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chromium / external / github.com / v8 / node / refs/heads/fuchsia / . / src / node_http2.cc
blob: c21adcfeb56e663e07a0fe4dbabe19c292953901 [file] [log] [blame]
#include "aliased_buffer.h"
#include "debug_utils-inl.h"
#include "memory_tracker-inl.h"
#include "node.h"
#include "node_buffer.h"
#include "node_http2.h"
#include "node_http2_state.h"
#include "node_mem-inl.h"
#include "node_perf.h"
#include "node_revert.h"
#include "util-inl.h"
#include <algorithm>
namespace node {
using v8::ArrayBuffer;
using v8::ArrayBufferView;
using v8::BackingStore;
using v8::Boolean;
using v8::Context;
using v8::Float64Array;
using v8::Function;
using v8::Integer;
using v8::NewStringType;
using v8::Number;
using v8::ObjectTemplate;
using v8::String;
using v8::Uint32;
using v8::Uint32Array;
using v8::Uint8Array;
using v8::Undefined;
using node::performance::PerformanceEntry;
namespace http2 {
namespace {
const char zero_bytes_256[256] = {};
inline Http2Stream* GetStream(Http2Session* session,
int32_t id,
nghttp2_data_source* source) {
Http2Stream* stream = static_cast<Http2Stream*>(source->ptr);
if (stream == nullptr)
stream = session->FindStream(id);
CHECK_NOT_NULL(stream);
CHECK_EQ(id, stream->id());
return stream;
}
} // anonymous namespace
// These configure the callbacks required by nghttp2 itself. There are
// two sets of callback functions, one that is used if a padding callback
// is set, and other that does not include the padding callback.
const Http2Session::Callbacks Http2Session::callback_struct_saved[2] = {
Callbacks(false),
Callbacks(true)};
// The Http2Scope object is used to queue a write to the i/o stream. It is
// used whenever any action is take on the underlying nghttp2 API that may
// push data into nghttp2 outbound data queue.
//
// For example:
//
// Http2Scope h2scope(session);
// nghttp2_submit_ping(**session, ... );
//
// When the Http2Scope passes out of scope and is deconstructed, it will
// call Http2Session::MaybeScheduleWrite().
Http2Scope::Http2Scope(Http2Stream* stream) : Http2Scope(stream->session()) {}
Http2Scope::Http2Scope(Http2Session* session) {
if (session == nullptr)
return;
if (session->flags_ & (SESSION_STATE_HAS_SCOPE |
SESSION_STATE_WRITE_SCHEDULED)) {
// There is another scope further below on the stack, or it is already
// known that a write is scheduled. In either case, there is nothing to do.
return;
}
session->flags_ |= SESSION_STATE_HAS_SCOPE;
session_ = session;
// Always keep the session object alive for at least as long as
// this scope is active.
session_handle_ = session->object();
CHECK(!session_handle_.IsEmpty());
}
Http2Scope::~Http2Scope() {
if (session_ == nullptr)
return;
session_->flags_ &= ~SESSION_STATE_HAS_SCOPE;
session_->MaybeScheduleWrite();
}
// The Http2Options object is used during the construction of Http2Session
// instances to configure an appropriate nghttp2_options struct. The class
// uses a single TypedArray instance that is shared with the JavaScript side
// to more efficiently pass values back and forth.
Http2Options::Http2Options(Environment* env, nghttp2_session_type type) {
nghttp2_option_new(&options_);
// Make sure closed connections aren't kept around, taking up memory.
// Note that this breaks the priority tree, which we don't use.
nghttp2_option_set_no_closed_streams(options_, 1);
// We manually handle flow control within a session in order to
// implement backpressure -- that is, we only send WINDOW_UPDATE
// frames to the remote peer as data is actually consumed by user
// code. This ensures that the flow of data over the connection
// does not move too quickly and limits the amount of data we
// are required to buffer.
nghttp2_option_set_no_auto_window_update(options_, 1);
// Enable built in support for receiving ALTSVC and ORIGIN frames (but
// only on client side sessions
if (type == NGHTTP2_SESSION_CLIENT) {
nghttp2_option_set_builtin_recv_extension_type(options_, NGHTTP2_ALTSVC);
nghttp2_option_set_builtin_recv_extension_type(options_, NGHTTP2_ORIGIN);
}
AliasedUint32Array& buffer = env->http2_state()->options_buffer;
uint32_t flags = buffer[IDX_OPTIONS_FLAGS];
if (flags & (1 << IDX_OPTIONS_MAX_DEFLATE_DYNAMIC_TABLE_SIZE)) {
nghttp2_option_set_max_deflate_dynamic_table_size(
options_,
buffer[IDX_OPTIONS_MAX_DEFLATE_DYNAMIC_TABLE_SIZE]);
}
if (flags & (1 << IDX_OPTIONS_MAX_RESERVED_REMOTE_STREAMS)) {
nghttp2_option_set_max_reserved_remote_streams(
options_,
buffer[IDX_OPTIONS_MAX_RESERVED_REMOTE_STREAMS]);
}
if (flags & (1 << IDX_OPTIONS_MAX_SEND_HEADER_BLOCK_LENGTH)) {
nghttp2_option_set_max_send_header_block_length(
options_,
buffer[IDX_OPTIONS_MAX_SEND_HEADER_BLOCK_LENGTH]);
}
// Recommended default
nghttp2_option_set_peer_max_concurrent_streams(options_, 100);
if (flags & (1 << IDX_OPTIONS_PEER_MAX_CONCURRENT_STREAMS)) {
nghttp2_option_set_peer_max_concurrent_streams(
options_,
buffer[IDX_OPTIONS_PEER_MAX_CONCURRENT_STREAMS]);
}
// The padding strategy sets the mechanism by which we determine how much
// additional frame padding to apply to DATA and HEADERS frames. Currently
// this is set on a per-session basis, but eventually we may switch to
// a per-stream setting, giving users greater control
if (flags & (1 << IDX_OPTIONS_PADDING_STRATEGY)) {
padding_strategy_type strategy =
static_cast<padding_strategy_type>(
buffer.GetValue(IDX_OPTIONS_PADDING_STRATEGY));
SetPaddingStrategy(strategy);
}
// The max header list pairs option controls the maximum number of
// header pairs the session may accept. This is a hard limit.. that is,
// if the remote peer sends more than this amount, the stream will be
// automatically closed with an RST_STREAM.
if (flags & (1 << IDX_OPTIONS_MAX_HEADER_LIST_PAIRS)) {
SetMaxHeaderPairs(buffer[IDX_OPTIONS_MAX_HEADER_LIST_PAIRS]);
}
// The HTTP2 specification places no limits on the number of HTTP2
// PING frames that can be sent. In order to prevent PINGS from being
// abused as an attack vector, however, we place a strict upper limit
// on the number of unacknowledged PINGS that can be sent at any given
// time.
if (flags & (1 << IDX_OPTIONS_MAX_OUTSTANDING_PINGS)) {
SetMaxOutstandingPings(buffer[IDX_OPTIONS_MAX_OUTSTANDING_PINGS]);
}
// The HTTP2 specification places no limits on the number of HTTP2
// SETTINGS frames that can be sent. In order to prevent PINGS from being
// abused as an attack vector, however, we place a strict upper limit
// on the number of unacknowledged SETTINGS that can be sent at any given
// time.
if (flags & (1 << IDX_OPTIONS_MAX_OUTSTANDING_SETTINGS)) {
SetMaxOutstandingSettings(buffer[IDX_OPTIONS_MAX_OUTSTANDING_SETTINGS]);
}
// The HTTP2 specification places no limits on the amount of memory
// that a session can consume. In order to prevent abuse, we place a
// cap on the amount of memory a session can consume at any given time.
// this is a credit based system. Existing streams may cause the limit
// to be temporarily exceeded but once over the limit, new streams cannot
// created.
// Important: The maxSessionMemory option in javascript is expressed in
// terms of MB increments (i.e. the value 1 == 1 MB)
if (flags & (1 << IDX_OPTIONS_MAX_SESSION_MEMORY)) {
SetMaxSessionMemory(buffer[IDX_OPTIONS_MAX_SESSION_MEMORY] * 1e6);
}
}
void Http2Session::Http2Settings::Init() {
AliasedUint32Array& buffer = env()->http2_state()->settings_buffer;
uint32_t flags = buffer[IDX_SETTINGS_COUNT];
size_t n = 0;
#define GRABSETTING(N, trace) \
if (flags & (1 << IDX_SETTINGS_##N)) { \
uint32_t val = buffer[IDX_SETTINGS_##N]; \
if (session_ != nullptr) \
Debug(session_, "setting " trace ": %d\n", val); \
entries_[n++] = \
nghttp2_settings_entry {NGHTTP2_SETTINGS_##N, val}; \
}
GRABSETTING(HEADER_TABLE_SIZE, "header table size");
GRABSETTING(MAX_CONCURRENT_STREAMS, "max concurrent streams");
GRABSETTING(MAX_FRAME_SIZE, "max frame size");
GRABSETTING(INITIAL_WINDOW_SIZE, "initial window size");
GRABSETTING(MAX_HEADER_LIST_SIZE, "max header list size");
GRABSETTING(ENABLE_PUSH, "enable push");
GRABSETTING(ENABLE_CONNECT_PROTOCOL, "enable connect protocol");
#undef GRABSETTING
count_ = n;
}
// The Http2Settings class is used to configure a SETTINGS frame that is
// to be sent to the connected peer. The settings are set using a TypedArray
// that is shared with the JavaScript side.
Http2Session::Http2Settings::Http2Settings(Environment* env,
Http2Session* session,
Local<Object> obj,
uint64_t start_time)
: AsyncWrap(env, obj, PROVIDER_HTTP2SETTINGS),
session_(session),
startTime_(start_time) {
Init();
}
// Generates a Buffer that contains the serialized payload of a SETTINGS
// frame. This can be used, for instance, to create the Base64-encoded
// content of an Http2-Settings header field.
Local<Value> Http2Session::Http2Settings::Pack() {
const size_t len = count_ * 6;
Local<Value> buf = Buffer::New(env(), len).ToLocalChecked();
ssize_t ret =
nghttp2_pack_settings_payload(
reinterpret_cast<uint8_t*>(Buffer::Data(buf)), len,
&entries_[0], count_);
if (ret >= 0)
return buf;
else
return Undefined(env()->isolate());
}
// Updates the shared TypedArray with the current remote or local settings for
// the session.
void Http2Session::Http2Settings::Update(Environment* env,
Http2Session* session,
get_setting fn) {
AliasedUint32Array& buffer = env->http2_state()->settings_buffer;
buffer[IDX_SETTINGS_HEADER_TABLE_SIZE] =
fn(**session, NGHTTP2_SETTINGS_HEADER_TABLE_SIZE);
buffer[IDX_SETTINGS_MAX_CONCURRENT_STREAMS] =
fn(**session, NGHTTP2_SETTINGS_MAX_CONCURRENT_STREAMS);
buffer[IDX_SETTINGS_INITIAL_WINDOW_SIZE] =
fn(**session, NGHTTP2_SETTINGS_INITIAL_WINDOW_SIZE);
buffer[IDX_SETTINGS_MAX_FRAME_SIZE] =
fn(**session, NGHTTP2_SETTINGS_MAX_FRAME_SIZE);
buffer[IDX_SETTINGS_MAX_HEADER_LIST_SIZE] =
fn(**session, NGHTTP2_SETTINGS_MAX_HEADER_LIST_SIZE);
buffer[IDX_SETTINGS_ENABLE_PUSH] =
fn(**session, NGHTTP2_SETTINGS_ENABLE_PUSH);
buffer[IDX_SETTINGS_ENABLE_CONNECT_PROTOCOL] =
fn(**session, NGHTTP2_SETTINGS_ENABLE_CONNECT_PROTOCOL);
}
// Initializes the shared TypedArray with the default settings values.
void Http2Session::Http2Settings::RefreshDefaults(Environment* env) {
AliasedUint32Array& buffer = env->http2_state()->settings_buffer;
buffer[IDX_SETTINGS_HEADER_TABLE_SIZE] =
DEFAULT_SETTINGS_HEADER_TABLE_SIZE;
buffer[IDX_SETTINGS_ENABLE_PUSH] =
DEFAULT_SETTINGS_ENABLE_PUSH;
buffer[IDX_SETTINGS_MAX_CONCURRENT_STREAMS] =
DEFAULT_SETTINGS_MAX_CONCURRENT_STREAMS;
buffer[IDX_SETTINGS_INITIAL_WINDOW_SIZE] =
DEFAULT_SETTINGS_INITIAL_WINDOW_SIZE;
buffer[IDX_SETTINGS_MAX_FRAME_SIZE] =
DEFAULT_SETTINGS_MAX_FRAME_SIZE;
buffer[IDX_SETTINGS_MAX_HEADER_LIST_SIZE] =
DEFAULT_SETTINGS_MAX_HEADER_LIST_SIZE;
buffer[IDX_SETTINGS_ENABLE_CONNECT_PROTOCOL] =
DEFAULT_SETTINGS_ENABLE_CONNECT_PROTOCOL;
buffer[IDX_SETTINGS_COUNT] =
(1 << IDX_SETTINGS_HEADER_TABLE_SIZE) |
(1 << IDX_SETTINGS_ENABLE_PUSH) |
(1 << IDX_SETTINGS_MAX_CONCURRENT_STREAMS) |
(1 << IDX_SETTINGS_INITIAL_WINDOW_SIZE) |
(1 << IDX_SETTINGS_MAX_FRAME_SIZE) |
(1 << IDX_SETTINGS_MAX_HEADER_LIST_SIZE) |
(1 << IDX_SETTINGS_ENABLE_CONNECT_PROTOCOL);
}
void Http2Session::Http2Settings::Send() {
Http2Scope h2scope(session_);
CHECK_EQ(nghttp2_submit_settings(**session_, NGHTTP2_FLAG_NONE,
&entries_[0], count_), 0);
}
void Http2Session::Http2Settings::Done(bool ack) {
uint64_t end = uv_hrtime();
double duration = (end - startTime_) / 1e6;
Local<Value> argv[] = {
Boolean::New(env()->isolate(), ack),
Number::New(env()->isolate(), duration)
};
MakeCallback(env()->ondone_string(), arraysize(argv), argv);
}
// The Http2Priority class initializes an appropriate nghttp2_priority_spec
// struct used when either creating a stream or updating its priority
// settings.
Http2Priority::Http2Priority(Environment* env,
Local<Value> parent,
Local<Value> weight,
Local<Value> exclusive) {
Local<Context> context = env->context();
int32_t parent_ = parent->Int32Value(context).ToChecked();
int32_t weight_ = weight->Int32Value(context).ToChecked();
bool exclusive_ = exclusive->BooleanValue(env->isolate());
Debug(env, DebugCategory::HTTP2STREAM,
"Http2Priority: parent: %d, weight: %d, exclusive: %d\n",
parent_, weight_, exclusive_);
nghttp2_priority_spec_init(&spec, parent_, weight_, exclusive_ ? 1 : 0);
}
const char* Http2Session::TypeName() const {
switch (session_type_) {
case NGHTTP2_SESSION_SERVER: return "server";
case NGHTTP2_SESSION_CLIENT: return "client";
default:
// This should never happen
ABORT();
}
}
// The Headers class initializes a proper array of nghttp2_nv structs
// containing the header name value pairs.
Headers::Headers(Isolate* isolate,
Local<Context> context,
Local<Array> headers) {
Local<Value> header_string = headers->Get(context, 0).ToLocalChecked();
Local<Value> header_count = headers->Get(context, 1).ToLocalChecked();
count_ = header_count.As<Uint32>()->Value();
int header_string_len = header_string.As<String>()->Length();
if (count_ == 0) {
CHECK_EQ(header_string_len, 0);
return;
}
// Allocate a single buffer with count_ nghttp2_nv structs, followed
// by the raw header data as passed from JS. This looks like:
// | possible padding | nghttp2_nv | nghttp2_nv | ... | header contents |
buf_.AllocateSufficientStorage((alignof(nghttp2_nv) - 1) +
count_ * sizeof(nghttp2_nv) +
header_string_len);
// Make sure the start address is aligned appropriately for an nghttp2_nv*.
char* start = reinterpret_cast<char*>(
RoundUp(reinterpret_cast<uintptr_t>(*buf_), alignof(nghttp2_nv)));
char* header_contents = start + (count_ * sizeof(nghttp2_nv));
nghttp2_nv* const nva = reinterpret_cast<nghttp2_nv*>(start);
CHECK_LE(header_contents + header_string_len, *buf_ + buf_.length());
CHECK_EQ(header_string.As<String>()->WriteOneByte(
isolate,
reinterpret_cast<uint8_t*>(header_contents),
0,
header_string_len,
String::NO_NULL_TERMINATION),
header_string_len);
size_t n = 0;
char* p;
for (p = header_contents; p < header_contents + header_string_len; n++) {
if (n >= count_) {
// This can happen if a passed header contained a null byte. In that
// case, just provide nghttp2 with an invalid header to make it reject
// the headers list.
static uint8_t zero = '\0';
nva[0].name = nva[0].value = &zero;
nva[0].namelen = nva[0].valuelen = 1;
count_ = 1;
return;
}
nva[n].flags = NGHTTP2_NV_FLAG_NONE;
nva[n].name = reinterpret_cast<uint8_t*>(p);
nva[n].namelen = strlen(p);
p += nva[n].namelen + 1;
nva[n].value = reinterpret_cast<uint8_t*>(p);
nva[n].valuelen = strlen(p);
p += nva[n].valuelen + 1;
}
}
Origins::Origins(Isolate* isolate,
Local<Context> context,
Local<String> origin_string,
size_t origin_count) : count_(origin_count) {
int origin_string_len = origin_string->Length();
if (count_ == 0) {
CHECK_EQ(origin_string_len, 0);
return;
}
// Allocate a single buffer with count_ nghttp2_nv structs, followed
// by the raw header data as passed from JS. This looks like:
// | possible padding | nghttp2_nv | nghttp2_nv | ... | header contents |
buf_.AllocateSufficientStorage((alignof(nghttp2_origin_entry) - 1) +
count_ * sizeof(nghttp2_origin_entry) +
origin_string_len);
// Make sure the start address is aligned appropriately for an nghttp2_nv*.
char* start = reinterpret_cast<char*>(
RoundUp(reinterpret_cast<uintptr_t>(*buf_),
alignof(nghttp2_origin_entry)));
char* origin_contents = start + (count_ * sizeof(nghttp2_origin_entry));
nghttp2_origin_entry* const nva =
reinterpret_cast<nghttp2_origin_entry*>(start);
CHECK_LE(origin_contents + origin_string_len, *buf_ + buf_.length());
CHECK_EQ(origin_string->WriteOneByte(
isolate,
reinterpret_cast<uint8_t*>(origin_contents),
0,
origin_string_len,
String::NO_NULL_TERMINATION),
origin_string_len);
size_t n = 0;
char* p;
for (p = origin_contents; p < origin_contents + origin_string_len; n++) {
if (n >= count_) {
static uint8_t zero = '\0';
nva[0].origin = &zero;
nva[0].origin_len = 1;
count_ = 1;
return;
}
nva[n].origin = reinterpret_cast<uint8_t*>(p);
nva[n].origin_len = strlen(p);
p += nva[n].origin_len + 1;
}
}
// Sets the various callback functions that nghttp2 will use to notify us
// about significant events while processing http2 stuff.
Http2Session::Callbacks::Callbacks(bool kHasGetPaddingCallback) {
CHECK_EQ(nghttp2_session_callbacks_new(&callbacks), 0);
nghttp2_session_callbacks_set_on_begin_headers_callback(
callbacks, OnBeginHeadersCallback);
nghttp2_session_callbacks_set_on_header_callback2(
callbacks, OnHeaderCallback);
nghttp2_session_callbacks_set_on_frame_recv_callback(
callbacks, OnFrameReceive);
nghttp2_session_callbacks_set_on_stream_close_callback(
callbacks, OnStreamClose);
nghttp2_session_callbacks_set_on_data_chunk_recv_callback(
callbacks, OnDataChunkReceived);
nghttp2_session_callbacks_set_on_frame_not_send_callback(
callbacks, OnFrameNotSent);
nghttp2_session_callbacks_set_on_invalid_header_callback2(
callbacks, OnInvalidHeader);
nghttp2_session_callbacks_set_error_callback(
callbacks, OnNghttpError);
nghttp2_session_callbacks_set_send_data_callback(
callbacks, OnSendData);
nghttp2_session_callbacks_set_on_invalid_frame_recv_callback(
callbacks, OnInvalidFrame);
nghttp2_session_callbacks_set_on_frame_send_callback(
callbacks, OnFrameSent);
if (kHasGetPaddingCallback) {
nghttp2_session_callbacks_set_select_padding_callback(
callbacks, OnSelectPadding);
}
}
Http2Session::Callbacks::~Callbacks() {
nghttp2_session_callbacks_del(callbacks);
}
void Http2Session::StopTrackingRcbuf(nghttp2_rcbuf* buf) {
StopTrackingMemory(buf);
}
void Http2Session::CheckAllocatedSize(size_t previous_size) const {
CHECK_GE(current_nghttp2_memory_, previous_size);
}
void Http2Session::IncreaseAllocatedSize(size_t size) {
current_nghttp2_memory_ += size;
}
void Http2Session::DecreaseAllocatedSize(size_t size) {
current_nghttp2_memory_ -= size;
}
Http2Session::Http2Session(Environment* env,
Local<Object> wrap,
nghttp2_session_type type)
: AsyncWrap(env, wrap, AsyncWrap::PROVIDER_HTTP2SESSION),
session_type_(type) {
MakeWeak();
statistics_.start_time = uv_hrtime();
// Capture the configuration options for this session
Http2Options opts(env, type);
max_session_memory_ = opts.GetMaxSessionMemory();
uint32_t maxHeaderPairs = opts.GetMaxHeaderPairs();
max_header_pairs_ =
type == NGHTTP2_SESSION_SERVER
? std::max(maxHeaderPairs, 4U) // minimum # of request headers
: std::max(maxHeaderPairs, 1U); // minimum # of response headers
max_outstanding_pings_ = opts.GetMaxOutstandingPings();
max_outstanding_settings_ = opts.GetMaxOutstandingSettings();
padding_strategy_ = opts.GetPaddingStrategy();
bool hasGetPaddingCallback =
padding_strategy_ != PADDING_STRATEGY_NONE;
nghttp2_session_callbacks* callbacks
= callback_struct_saved[hasGetPaddingCallback ? 1 : 0].callbacks;
auto fn = type == NGHTTP2_SESSION_SERVER ?
nghttp2_session_server_new3 :
nghttp2_session_client_new3;
nghttp2_mem alloc_info = MakeAllocator();
// This should fail only if the system is out of memory, which
// is going to cause lots of other problems anyway, or if any
// of the options are out of acceptable range, which we should
// be catching before it gets this far. Either way, crash if this
// fails.
CHECK_EQ(fn(&session_, callbacks, this, *opts, &alloc_info), 0);
outgoing_storage_.reserve(1024);
outgoing_buffers_.reserve(32);
// Make the js_fields_ property accessible to JS land.
js_fields_store_ =
ArrayBuffer::NewBackingStore(env->isolate(), sizeof(SessionJSFields));
js_fields_ = new(js_fields_store_->Data()) SessionJSFields;
Local<ArrayBuffer> ab = ArrayBuffer::New(env->isolate(), js_fields_store_);
Local<Uint8Array> uint8_arr =
Uint8Array::New(ab, 0, kSessionUint8FieldCount);
USE(wrap->Set(env->context(), env->fields_string(), uint8_arr));
}
Http2Session::~Http2Session() {
CHECK_EQ(flags_ & SESSION_STATE_HAS_SCOPE, 0);
Debug(this, "freeing nghttp2 session");
nghttp2_session_del(session_);
CHECK_EQ(current_nghttp2_memory_, 0);
js_fields_->~SessionJSFields();
}
std::string Http2Session::diagnostic_name() const {
return std::string("Http2Session ") + TypeName() + " (" +
std::to_string(static_cast<int64_t>(get_async_id())) + ")";
}
inline bool HasHttp2Observer(Environment* env) {
AliasedUint32Array& observers = env->performance_state()->observers;
return observers[performance::NODE_PERFORMANCE_ENTRY_TYPE_HTTP2] != 0;
}
void Http2Stream::EmitStatistics() {
if (!HasHttp2Observer(env()))
return;
auto entry =
std::make_unique<Http2StreamPerformanceEntry>(env(), id_, statistics_);
env()->SetImmediate([entry = move(entry)](Environment* env) {
if (!HasHttp2Observer(env))
return;
HandleScope handle_scope(env->isolate());
AliasedFloat64Array& buffer = env->http2_state()->stream_stats_buffer;
buffer[IDX_STREAM_STATS_ID] = entry->id();
if (entry->first_byte() != 0) {
buffer[IDX_STREAM_STATS_TIMETOFIRSTBYTE] =
(entry->first_byte() - entry->startTimeNano()) / 1e6;
} else {
buffer[IDX_STREAM_STATS_TIMETOFIRSTBYTE] = 0;
}
if (entry->first_header() != 0) {
buffer[IDX_STREAM_STATS_TIMETOFIRSTHEADER] =
(entry->first_header() - entry->startTimeNano()) / 1e6;
} else {
buffer[IDX_STREAM_STATS_TIMETOFIRSTHEADER] = 0;
}
if (entry->first_byte_sent() != 0) {
buffer[IDX_STREAM_STATS_TIMETOFIRSTBYTESENT] =
(entry->first_byte_sent() - entry->startTimeNano()) / 1e6;
} else {
buffer[IDX_STREAM_STATS_TIMETOFIRSTBYTESENT] = 0;
}
buffer[IDX_STREAM_STATS_SENTBYTES] = entry->sent_bytes();
buffer[IDX_STREAM_STATS_RECEIVEDBYTES] = entry->received_bytes();
Local<Object> obj;
if (entry->ToObject().ToLocal(&obj)) entry->Notify(obj);
});
}
void Http2Session::EmitStatistics() {
if (!HasHttp2Observer(env()))
return;
auto entry = std::make_unique<Http2SessionPerformanceEntry>(
env(), statistics_, session_type_);
env()->SetImmediate([entry = std::move(entry)](Environment* env) {
if (!HasHttp2Observer(env))
return;
HandleScope handle_scope(env->isolate());
AliasedFloat64Array& buffer = env->http2_state()->session_stats_buffer;
buffer[IDX_SESSION_STATS_TYPE] = entry->type();
buffer[IDX_SESSION_STATS_PINGRTT] = entry->ping_rtt() / 1e6;
buffer[IDX_SESSION_STATS_FRAMESRECEIVED] = entry->frame_count();
buffer[IDX_SESSION_STATS_FRAMESSENT] = entry->frame_sent();
buffer[IDX_SESSION_STATS_STREAMCOUNT] = entry->stream_count();
buffer[IDX_SESSION_STATS_STREAMAVERAGEDURATION] =
entry->stream_average_duration();
buffer[IDX_SESSION_STATS_DATA_SENT] = entry->data_sent();
buffer[IDX_SESSION_STATS_DATA_RECEIVED] = entry->data_received();
buffer[IDX_SESSION_STATS_MAX_CONCURRENT_STREAMS] =
entry->max_concurrent_streams();
Local<Object> obj;
if (entry->ToObject().ToLocal(&obj)) entry->Notify(obj);
});
}
// Closes the session and frees the associated resources
void Http2Session::Close(uint32_t code, bool socket_closed) {
Debug(this, "closing session");
if (flags_ & SESSION_STATE_CLOSING)
return;
flags_ |= SESSION_STATE_CLOSING;
// Stop reading on the i/o stream
if (stream_ != nullptr) {
flags_ |= SESSION_STATE_READING_STOPPED;
stream_->ReadStop();
}
// If the socket is not closed, then attempt to send a closing GOAWAY
// frame. There is no guarantee that this GOAWAY will be received by
// the peer but the HTTP/2 spec recommends sending it anyway. We'll
// make a best effort.
if (!socket_closed) {
Debug(this, "terminating session with code %d", code);
CHECK_EQ(nghttp2_session_terminate_session(session_, code), 0);
SendPendingData();
} else if (stream_ != nullptr) {
stream_->RemoveStreamListener(this);
}
flags_ |= SESSION_STATE_CLOSED;
// If we are writing we will get to make the callback in OnStreamAfterWrite.
if ((flags_ & SESSION_STATE_WRITE_IN_PROGRESS) == 0) {
Debug(this, "make done session callback");
HandleScope scope(env()->isolate());
MakeCallback(env()->ondone_string(), 0, nullptr);
}
// If there are outstanding pings, those will need to be canceled, do
// so on the next iteration of the event loop to avoid calling out into
// javascript since this may be called during garbage collection.
while (BaseObjectPtr<Http2Ping> ping = PopPing()) {
ping->DetachFromSession();
env()->SetImmediate(
[ping = std::move(ping)](Environment* env) {
ping->Done(false);
});
}
statistics_.end_time = uv_hrtime();
EmitStatistics();
}
// Locates an existing known stream by ID. nghttp2 has a similar method
// but this is faster and does not fail if the stream is not found.
inline Http2Stream* Http2Session::FindStream(int32_t id) {
auto s = streams_.find(id);
return s != streams_.end() ? s->second : nullptr;
}
inline bool Http2Session::CanAddStream() {
uint32_t maxConcurrentStreams =
nghttp2_session_get_local_settings(
session_, NGHTTP2_SETTINGS_MAX_CONCURRENT_STREAMS);
size_t maxSize =
std::min(streams_.max_size(), static_cast<size_t>(maxConcurrentStreams));
// We can add a new stream so long as we are less than the current
// maximum on concurrent streams and there's enough available memory
return streams_.size() < maxSize &&
IsAvailableSessionMemory(sizeof(Http2Stream));
}
inline void Http2Session::AddStream(Http2Stream* stream) {
CHECK_GE(++statistics_.stream_count, 0);
streams_[stream->id()] = stream;
size_t size = streams_.size();
if (size > statistics_.max_concurrent_streams)
statistics_.max_concurrent_streams = size;
IncrementCurrentSessionMemory(sizeof(*stream));
}
inline void Http2Session::RemoveStream(Http2Stream* stream) {
if (streams_.empty() || stream == nullptr)
return; // Nothing to remove, item was never added?
streams_.erase(stream->id());
DecrementCurrentSessionMemory(sizeof(*stream));
}
// Used as one of the Padding Strategy functions. Will attempt to ensure
// that the total frame size, including header bytes, are 8-byte aligned.
// If maxPayloadLen is smaller than the number of bytes necessary to align,
// will return maxPayloadLen instead.
ssize_t Http2Session::OnDWordAlignedPadding(size_t frameLen,
size_t maxPayloadLen) {
size_t r = (frameLen + 9) % 8;
if (r == 0) return frameLen; // If already a multiple of 8, return.
size_t pad = frameLen + (8 - r);
// If maxPayloadLen happens to be less than the calculated pad length,
// use the max instead, even tho this means the frame will not be
// aligned.
pad = std::min(maxPayloadLen, pad);
Debug(this, "using frame size padding: %d", pad);
return pad;
}
// Used as one of the Padding Strategy functions. Uses the maximum amount
// of padding allowed for the current frame.
ssize_t Http2Session::OnMaxFrameSizePadding(size_t frameLen,
size_t maxPayloadLen) {
Debug(this, "using max frame size padding: %d", maxPayloadLen);
return maxPayloadLen;
}
// Write data received from the i/o stream to the underlying nghttp2_session.
// On each call to nghttp2_session_mem_recv, nghttp2 will begin calling the
// various callback functions. Each of these will typically result in a call
// out to JavaScript so this particular function is rather hot and can be
// quite expensive. This is a potential performance optimization target later.
ssize_t Http2Session::ConsumeHTTP2Data() {
CHECK_NOT_NULL(stream_buf_.base);
CHECK_LT(stream_buf_offset_, stream_buf_.len);
size_t read_len = stream_buf_.len - stream_buf_offset_;
// multiple side effects.
Debug(this, "receiving %d bytes [wants data? %d]",
read_len,
nghttp2_session_want_read(session_));
flags_ &= ~SESSION_STATE_NGHTTP2_RECV_PAUSED;
ssize_t ret =
nghttp2_session_mem_recv(session_,
reinterpret_cast<uint8_t*>(stream_buf_.base) +
stream_buf_offset_,
read_len);
CHECK_NE(ret, NGHTTP2_ERR_NOMEM);
if (flags_ & SESSION_STATE_NGHTTP2_RECV_PAUSED) {
CHECK_NE(flags_ & SESSION_STATE_READING_STOPPED, 0);
CHECK_GT(ret, 0);
CHECK_LE(static_cast<size_t>(ret), read_len);
if (static_cast<size_t>(ret) < read_len) {
// Mark the remainder of the data as available for later consumption.
stream_buf_offset_ += ret;
return ret;
}
}
// We are done processing the current input chunk.
DecrementCurrentSessionMemory(stream_buf_.len);
stream_buf_offset_ = 0;
stream_buf_ab_.Reset();
stream_buf_allocation_.clear();
stream_buf_ = uv_buf_init(nullptr, 0);
if (ret < 0)
return ret;
// Send any data that was queued up while processing the received data.
if (!IsDestroyed()) {
SendPendingData();
}
return ret;
}
inline int32_t GetFrameID(const nghttp2_frame* frame) {
// If this is a push promise, we want to grab the id of the promised stream
return (frame->hd.type == NGHTTP2_PUSH_PROMISE) ?
frame->push_promise.promised_stream_id :
frame->hd.stream_id;
}
// Called by nghttp2 at the start of receiving a HEADERS frame. We use this
// callback to determine if a new stream is being created or if we are simply
// adding a new block of headers to an existing stream. The header pairs
// themselves are set in the OnHeaderCallback
int Http2Session::OnBeginHeadersCallback(nghttp2_session* handle,
const nghttp2_frame* frame,
void* user_data) {
Http2Session* session = static_cast<Http2Session*>(user_data);
int32_t id = GetFrameID(frame);
Debug(session, "beginning headers for stream %d", id);
Http2Stream* stream = session->FindStream(id);
// The common case is that we're creating a new stream. The less likely
// case is that we're receiving a set of trailers
if (LIKELY(stream == nullptr)) {
if (UNLIKELY(!session->CanAddStream() ||
Http2Stream::New(session, id, frame->headers.cat) ==
nullptr)) {
if (session->rejected_stream_count_++ >
session->js_fields_->max_rejected_streams)
return NGHTTP2_ERR_CALLBACK_FAILURE;
// Too many concurrent streams being opened
nghttp2_submit_rst_stream(**session, NGHTTP2_FLAG_NONE, id,
NGHTTP2_ENHANCE_YOUR_CALM);
return NGHTTP2_ERR_TEMPORAL_CALLBACK_FAILURE;
}
session->rejected_stream_count_ = 0;
} else if (!stream->IsDestroyed()) {
stream->StartHeaders(frame->headers.cat);
}
return 0;
}
// Called by nghttp2 for each header name/value pair in a HEADERS block.
// This had to have been preceded by a call to OnBeginHeadersCallback so
// the Http2Stream is guaranteed to already exist.
int Http2Session::OnHeaderCallback(nghttp2_session* handle,
const nghttp2_frame* frame,
nghttp2_rcbuf* name,
nghttp2_rcbuf* value,
uint8_t flags,
void* user_data) {
Http2Session* session = static_cast<Http2Session*>(user_data);
int32_t id = GetFrameID(frame);
Http2Stream* stream = session->FindStream(id);
// If stream is null at this point, either something odd has happened
// or the stream was closed locally while header processing was occurring.
// either way, do not proceed and close the stream.
if (UNLIKELY(stream == nullptr))
return NGHTTP2_ERR_TEMPORAL_CALLBACK_FAILURE;
// If the stream has already been destroyed, ignore.
if (!stream->IsDestroyed() && !stream->AddHeader(name, value, flags)) {
// This will only happen if the connected peer sends us more
// than the allowed number of header items at any given time
stream->SubmitRstStream(NGHTTP2_ENHANCE_YOUR_CALM);
return NGHTTP2_ERR_TEMPORAL_CALLBACK_FAILURE;
}
return 0;
}
// Called by nghttp2 when a complete HTTP2 frame has been received. There are
// only a handful of frame types that we care about handling here.
int Http2Session::OnFrameReceive(nghttp2_session* handle,
const nghttp2_frame* frame,
void* user_data) {
Http2Session* session = static_cast<Http2Session*>(user_data);
session->statistics_.frame_count++;
Debug(session, "complete frame received: type: %d",
frame->hd.type);
switch (frame->hd.type) {
case NGHTTP2_DATA:
return session->HandleDataFrame(frame);
case NGHTTP2_PUSH_PROMISE:
// Intentional fall-through, handled just like headers frames
case NGHTTP2_HEADERS:
session->HandleHeadersFrame(frame);
break;
case NGHTTP2_SETTINGS:
session->HandleSettingsFrame(frame);
break;
case NGHTTP2_PRIORITY:
session->HandlePriorityFrame(frame);
break;
case NGHTTP2_GOAWAY:
session->HandleGoawayFrame(frame);
break;
case NGHTTP2_PING:
session->HandlePingFrame(frame);
break;
case NGHTTP2_ALTSVC:
session->HandleAltSvcFrame(frame);
break;
case NGHTTP2_ORIGIN:
session->HandleOriginFrame(frame);
break;
default:
break;
}
return 0;
}
int Http2Session::OnInvalidFrame(nghttp2_session* handle,
const nghttp2_frame* frame,
int lib_error_code,
void* user_data) {
Http2Session* session = static_cast<Http2Session*>(user_data);
Debug(session,
"invalid frame received (%u/%u), code: %d",
session->invalid_frame_count_,
session->js_fields_->max_invalid_frames,
lib_error_code);
if (session->invalid_frame_count_++ > session->js_fields_->max_invalid_frames)
return 1;
// If the error is fatal or if error code is ERR_STREAM_CLOSED... emit error
if (nghttp2_is_fatal(lib_error_code) ||
lib_error_code == NGHTTP2_ERR_STREAM_CLOSED) {
Environment* env = session->env();
Isolate* isolate = env->isolate();
HandleScope scope(isolate);
Local<Context> context = env->context();
Context::Scope context_scope(context);
Local<Value> arg = Integer::New(isolate, lib_error_code);
session->MakeCallback(env->http2session_on_error_function(), 1, &arg);
}
return 0;
}
// If nghttp2 is unable to send a queued up frame, it will call this callback
// to let us know. If the failure occurred because we are in the process of
// closing down the session or stream, we go ahead and ignore it. We don't
// really care about those and there's nothing we can reasonably do about it
// anyway. Other types of failures are reported up to JavaScript. This should
// be exceedingly rare.
int Http2Session::OnFrameNotSent(nghttp2_session* handle,
const nghttp2_frame* frame,
int error_code,
void* user_data) {
Http2Session* session = static_cast<Http2Session*>(user_data);
Environment* env = session->env();
Debug(session, "frame type %d was not sent, code: %d",
frame->hd.type, error_code);
// Do not report if the frame was not sent due to the session closing
if (error_code == NGHTTP2_ERR_SESSION_CLOSING ||
error_code == NGHTTP2_ERR_STREAM_CLOSED ||
error_code == NGHTTP2_ERR_STREAM_CLOSING ||
session->js_fields_->frame_error_listener_count == 0) {
return 0;
}
Isolate* isolate = env->isolate();
HandleScope scope(isolate);
Local<Context> context = env->context();
Context::Scope context_scope(context);
Local<Value> argv[3] = {
Integer::New(isolate, frame->hd.stream_id),
Integer::New(isolate, frame->hd.type),
Integer::New(isolate, error_code)
};
session->MakeCallback(
env->http2session_on_frame_error_function(),
arraysize(argv), argv);
return 0;
}
int Http2Session::OnFrameSent(nghttp2_session* handle,
const nghttp2_frame* frame,
void* user_data) {
Http2Session* session = static_cast<Http2Session*>(user_data);
session->statistics_.frame_sent += 1;
return 0;
}
// Called by nghttp2 when a stream closes.
int Http2Session::OnStreamClose(nghttp2_session* handle,
int32_t id,
uint32_t code,
void* user_data) {
Http2Session* session = static_cast<Http2Session*>(user_data);
Environment* env = session->env();
Isolate* isolate = env->isolate();
HandleScope scope(isolate);
Local<Context> context = env->context();
Context::Scope context_scope(context);
Debug(session, "stream %d closed with code: %d", id, code);
Http2Stream* stream = session->FindStream(id);
// Intentionally ignore the callback if the stream does not exist or has
// already been destroyed
if (stream == nullptr || stream->IsDestroyed())
return 0;
stream->Close(code);
// It is possible for the stream close to occur before the stream is
// ever passed on to the javascript side. If that happens, the callback
// will return false.
Local<Value> arg = Integer::NewFromUnsigned(isolate, code);
MaybeLocal<Value> answer =
stream->MakeCallback(env->http2session_on_stream_close_function(),
1, &arg);
if (answer.IsEmpty() ||
!(answer.ToLocalChecked()->BooleanValue(env->isolate()))) {
// Skip to destroy
stream->Destroy();
}
return 0;
}
// Called by nghttp2 when an invalid header has been received. For now, we
// ignore these. If this callback was not provided, nghttp2 would handle
// invalid headers strictly and would shut down the stream. We are intentionally
// being more lenient here although we may want to revisit this choice later.
int Http2Session::OnInvalidHeader(nghttp2_session* session,
const nghttp2_frame* frame,
nghttp2_rcbuf* name,
nghttp2_rcbuf* value,
uint8_t flags,
void* user_data) {
// Ignore invalid header fields by default.
return 0;
}
// When nghttp2 receives a DATA frame, it will deliver the data payload to
// us in discrete chunks. We push these into a linked list stored in the
// Http2Sttream which is flushed out to JavaScript as quickly as possible.
// This can be a particularly hot path.
int Http2Session::OnDataChunkReceived(nghttp2_session* handle,
uint8_t flags,
int32_t id,
const uint8_t* data,
size_t len,
void* user_data) {
Http2Session* session = static_cast<Http2Session*>(user_data);
Debug(session, "buffering data chunk for stream %d, size: "
"%d, flags: %d", id, len, flags);
Environment* env = session->env();
HandleScope scope(env->isolate());
// We should never actually get a 0-length chunk so this check is
// only a precaution at this point.
if (len == 0)
return 0;
// Notify nghttp2 that we've consumed a chunk of data on the connection
// so that it can send a WINDOW_UPDATE frame. This is a critical part of
// the flow control process in http2
CHECK_EQ(nghttp2_session_consume_connection(handle, len), 0);
Http2Stream* stream = session->FindStream(id);
// If the stream has been destroyed, ignore this chunk
if (stream->IsDestroyed())
return 0;
stream->statistics_.received_bytes += len;
// Repeatedly ask the stream's owner for memory, and copy the read data
// into those buffers.
// The typical case is actually the exception here; Http2StreamListeners
// know about the HTTP2 session associated with this stream, so they know
// about the larger from-socket read buffer, so they do not require copying.
do {
uv_buf_t buf = stream->EmitAlloc(len);
ssize_t avail = len;
if (static_cast<ssize_t>(buf.len) < avail)
avail = buf.len;
// `buf.base == nullptr` is the default Http2StreamListener's way
// of saying that it wants a pointer to the raw original.
// Since it has access to the original socket buffer from which the data
// was read in the first place, it can use that to minimize ArrayBuffer
// allocations.
if (LIKELY(buf.base == nullptr))
buf.base = reinterpret_cast<char*>(const_cast<uint8_t*>(data));
else
memcpy(buf.base, data, avail);
data += avail;
len -= avail;
stream->EmitRead(avail, buf);
// If the stream owner (e.g. the JS Http2Stream) wants more data, just
// tell nghttp2 that all data has been consumed. Otherwise, defer until
// more data is being requested.
if (stream->IsReading())
nghttp2_session_consume_stream(handle, id, avail);
else
stream->inbound_consumed_data_while_paused_ += avail;
// If we have a gathered a lot of data for output, try sending it now.
if (session->outgoing_length_ > 4096 ||
stream->available_outbound_length_ > 4096) {
session->SendPendingData();
}
} while (len != 0);
// If we are currently waiting for a write operation to finish, we should
// tell nghttp2 that we want to wait before we process more input data.
if (session->flags_ & SESSION_STATE_WRITE_IN_PROGRESS) {
CHECK_NE(session->flags_ & SESSION_STATE_READING_STOPPED, 0);
session->flags_ |= SESSION_STATE_NGHTTP2_RECV_PAUSED;
return NGHTTP2_ERR_PAUSE;
}
return 0;
}
// Called by nghttp2 when it needs to determine how much padding to use in
// a DATA or HEADERS frame.
ssize_t Http2Session::OnSelectPadding(nghttp2_session* handle,
const nghttp2_frame* frame,
size_t maxPayloadLen,
void* user_data) {
Http2Session* session = static_cast<Http2Session*>(user_data);
ssize_t padding = frame->hd.length;
switch (session->padding_strategy_) {
case PADDING_STRATEGY_NONE:
// Fall-through
break;
case PADDING_STRATEGY_MAX:
padding = session->OnMaxFrameSizePadding(padding, maxPayloadLen);
break;
case PADDING_STRATEGY_ALIGNED:
padding = session->OnDWordAlignedPadding(padding, maxPayloadLen);
break;
}
return padding;
}
#define BAD_PEER_MESSAGE "Remote peer returned unexpected data while we " \
"expected SETTINGS frame. Perhaps, peer does not " \
"support HTTP/2 properly."
// We use this currently to determine when an attempt is made to use the http2
// protocol with a non-http2 peer.
int Http2Session::OnNghttpError(nghttp2_session* handle,
const char* message,
size_t len,
void* user_data) {
// Unfortunately, this is currently the only way for us to know if
// the session errored because the peer is not an http2 peer.
Http2Session* session = static_cast<Http2Session*>(user_data);
Debug(session, "Error '%.*s'", len, message);
if (strncmp(message, BAD_PEER_MESSAGE, len) == 0) {
Environment* env = session->env();
Isolate* isolate = env->isolate();
HandleScope scope(isolate);
Local<Context> context = env->context();
Context::Scope context_scope(context);
Local<Value> arg = Integer::New(isolate, NGHTTP2_ERR_PROTO);
session->MakeCallback(env->http2session_on_error_function(), 1, &arg);
}
return 0;
}
uv_buf_t Http2StreamListener::OnStreamAlloc(size_t size) {
// See the comments in Http2Session::OnDataChunkReceived
// (which is the only possible call site for this method).
return uv_buf_init(nullptr, size);
}
void Http2StreamListener::OnStreamRead(ssize_t nread, const uv_buf_t& buf) {
Http2Stream* stream = static_cast<Http2Stream*>(stream_);
Http2Session* session = stream->session();
Environment* env = stream->env();
HandleScope handle_scope(env->isolate());
Context::Scope context_scope(env->context());
if (nread < 0) {
PassReadErrorToPreviousListener(nread);
return;
}
Local<ArrayBuffer> ab;
if (session->stream_buf_ab_.IsEmpty()) {
ab = session->stream_buf_allocation_.ToArrayBuffer();
session->stream_buf_ab_.Reset(env->isolate(), ab);
} else {
ab = PersistentToLocal::Strong(session->stream_buf_ab_);
}
// There is a single large array buffer for the entire data read from the
// network; create a slice of that array buffer and emit it as the
// received data buffer.
size_t offset = buf.base - session->stream_buf_.base;
// Verify that the data offset is inside the current read buffer.
CHECK_GE(offset, session->stream_buf_offset_);
CHECK_LE(offset, session->stream_buf_.len);
CHECK_LE(offset + buf.len, session->stream_buf_.len);
stream->CallJSOnreadMethod(nread, ab, offset);
}
// Called by OnFrameReceived to notify JavaScript land that a complete
// HEADERS frame has been received and processed. This method converts the
// received headers into a JavaScript array and pushes those out to JS.
void Http2Session::HandleHeadersFrame(const nghttp2_frame* frame) {
Isolate* isolate = env()->isolate();
HandleScope scope(isolate);
Local<Context> context = env()->context();
Context::Scope context_scope(context);
int32_t id = GetFrameID(frame);
Debug(this, "handle headers frame for stream %d", id);
Http2Stream* stream = FindStream(id);
// If the stream has already been destroyed, ignore.
if (stream->IsDestroyed())
return;
std::vector<nghttp2_header> headers(stream->move_headers());
DecrementCurrentSessionMemory(stream->current_headers_length_);
stream->current_headers_length_ = 0;
// The headers are passed in above as a queue of nghttp2_header structs.
// The following converts that into a JS array with the structure:
// [name1, value1, name2, value2, name3, value3, name3, value4] and so on.
// That array is passed up to the JS layer and converted into an Object form
// like {name1: value1, name2: value2, name3: [value3, value4]}. We do it
// this way for performance reasons (it's faster to generate and pass an
// array than it is to generate and pass the object).
size_t headers_size = headers.size();
std::vector<Local<Value>> headers_v(headers_size * 2);
for (size_t i = 0; i < headers_size; ++i) {
const nghttp2_header& item = headers[i];
// The header name and value are passed as external one-byte strings
headers_v[i * 2] =
ExternalHeader::New<true>(this, item.name).ToLocalChecked();
headers_v[i * 2 + 1] =
ExternalHeader::New<false>(this, item.value).ToLocalChecked();
}
Local<Value> args[5] = {
stream->object(),
Integer::New(isolate, id),
Integer::New(isolate, stream->headers_category()),
Integer::New(isolate, frame->hd.flags),
Array::New(isolate, headers_v.data(), headers_size * 2)};
MakeCallback(env()->http2session_on_headers_function(),
arraysize(args), args);
}
// Called by OnFrameReceived when a complete PRIORITY frame has been
// received. Notifies JS land about the priority change. Note that priorities
// are considered advisory only, so this has no real effect other than to
// simply let user code know that the priority has changed.
void Http2Session::HandlePriorityFrame(const nghttp2_frame* frame) {
if (js_fields_->priority_listener_count == 0) return;
Isolate* isolate = env()->isolate();
HandleScope scope(isolate);
Local<Context> context = env()->context();
Context::Scope context_scope(context);
nghttp2_priority priority_frame = frame->priority;
int32_t id = GetFrameID(frame);
Debug(this, "handle priority frame for stream %d", id);
// Priority frame stream ID should never be <= 0. nghttp2 handles this for us
nghttp2_priority_spec spec = priority_frame.pri_spec;
Local<Value> argv[4] = {
Integer::New(isolate, id),
Integer::New(isolate, spec.stream_id),
Integer::New(isolate, spec.weight),
Boolean::New(isolate, spec.exclusive)
};
MakeCallback(env()->http2session_on_priority_function(),
arraysize(argv), argv);
}
// Called by OnFrameReceived when a complete DATA frame has been received.
// If we know that this was the last DATA frame (because the END_STREAM flag
// is set), then we'll terminate the readable side of the StreamBase.
int Http2Session::HandleDataFrame(const nghttp2_frame* frame) {
int32_t id = GetFrameID(frame);
Debug(this, "handling data frame for stream %d", id);
Http2Stream* stream = FindStream(id);
if (!stream->IsDestroyed() && frame->hd.flags & NGHTTP2_FLAG_END_STREAM) {
stream->EmitRead(UV_EOF);
} else if (frame->hd.length == 0) {
return 1; // Consider 0-length frame without END_STREAM an error.
}
return 0;
}
// Called by OnFrameReceived when a complete GOAWAY frame has been received.
void Http2Session::HandleGoawayFrame(const nghttp2_frame* frame) {
Isolate* isolate = env()->isolate();
HandleScope scope(isolate);
Local<Context> context = env()->context();
Context::Scope context_scope(context);
nghttp2_goaway goaway_frame = frame->goaway;
Debug(this, "handling goaway frame");
Local<Value> argv[3] = {
Integer::NewFromUnsigned(isolate, goaway_frame.error_code),
Integer::New(isolate, goaway_frame.last_stream_id),
Undefined(isolate)
};
size_t length = goaway_frame.opaque_data_len;
if (length > 0) {
argv[2] = Buffer::Copy(isolate,
reinterpret_cast<char*>(goaway_frame.opaque_data),
length).ToLocalChecked();
}
MakeCallback(env()->http2session_on_goaway_data_function(),
arraysize(argv), argv);
}
// Called by OnFrameReceived when a complete ALTSVC frame has been received.
void Http2Session::HandleAltSvcFrame(const nghttp2_frame* frame) {
if (!(js_fields_->bitfield & (1 << kSessionHasAltsvcListeners))) return;
Isolate* isolate = env()->isolate();
HandleScope scope(isolate);
Local<Context> context = env()->context();
Context::Scope context_scope(context);
int32_t id = GetFrameID(frame);
nghttp2_extension ext = frame->ext;
nghttp2_ext_altsvc* altsvc = static_cast<nghttp2_ext_altsvc*>(ext.payload);
Debug(this, "handling altsvc frame");
Local<Value> argv[3] = {
Integer::New(isolate, id),
String::NewFromOneByte(isolate,
altsvc->origin,
NewStringType::kNormal,
altsvc->origin_len).ToLocalChecked(),
String::NewFromOneByte(isolate,
altsvc->field_value,
NewStringType::kNormal,
altsvc->field_value_len).ToLocalChecked(),
};
MakeCallback(env()->http2session_on_altsvc_function(),
arraysize(argv), argv);
}
void Http2Session::HandleOriginFrame(const nghttp2_frame* frame) {
Isolate* isolate = env()->isolate();
HandleScope scope(isolate);
Local<Context> context = env()->context();
Context::Scope context_scope(context);
Debug(this, "handling origin frame");
nghttp2_extension ext = frame->ext;
nghttp2_ext_origin* origin = static_cast<nghttp2_ext_origin*>(ext.payload);
size_t nov = origin->nov;
std::vector<Local<Value>> origin_v(nov);
for (size_t i = 0; i < nov; ++i) {
const nghttp2_origin_entry& entry = origin->ov[i];
origin_v[i] =
String::NewFromOneByte(
isolate, entry.origin, NewStringType::kNormal, entry.origin_len)
.ToLocalChecked();
}
Local<Value> holder = Array::New(isolate, origin_v.data(), origin_v.size());
MakeCallback(env()->http2session_on_origin_function(), 1, &holder);
}
// Called by OnFrameReceived when a complete PING frame has been received.
void Http2Session::HandlePingFrame(const nghttp2_frame* frame) {
Isolate* isolate = env()->isolate();
HandleScope scope(isolate);
Local<Context> context = env()->context();
Context::Scope context_scope(context);
Local<Value> arg;
bool ack = frame->hd.flags & NGHTTP2_FLAG_ACK;
if (ack) {
BaseObjectPtr<Http2Ping> ping = PopPing();
if (!ping) {
// PING Ack is unsolicited. Treat as a connection error. The HTTP/2
// spec does not require this, but there is no legitimate reason to
// receive an unsolicited PING ack on a connection. Either the peer
// is buggy or malicious, and we're not going to tolerate such
// nonsense.
arg = Integer::New(isolate, NGHTTP2_ERR_PROTO);
MakeCallback(env()->http2session_on_error_function(), 1, &arg);
return;
}
ping->Done(true, frame->ping.opaque_data);
return;
}
if (!(js_fields_->bitfield & (1 << kSessionHasPingListeners))) return;
// Notify the session that a ping occurred
arg = Buffer::Copy(env(),
reinterpret_cast<const char*>(frame->ping.opaque_data),
8).ToLocalChecked();
MakeCallback(env()->http2session_on_ping_function(), 1, &arg);
}
// Called by OnFrameReceived when a complete SETTINGS frame has been received.
void Http2Session::HandleSettingsFrame(const nghttp2_frame* frame) {
bool ack = frame->hd.flags & NGHTTP2_FLAG_ACK;
if (!ack) {
js_fields_->bitfield &= ~(1 << kSessionRemoteSettingsIsUpToDate);
if (!(js_fields_->bitfield & (1 << kSessionHasRemoteSettingsListeners)))
return;
// This is not a SETTINGS acknowledgement, notify and return
MakeCallback(env()->http2session_on_settings_function(), 0, nullptr);
return;
}
// If this is an acknowledgement, we should have an Http2Settings
// object for it.
BaseObjectPtr<Http2Settings> settings = PopSettings();
if (settings) {
settings->Done(true);
return;
}
// SETTINGS Ack is unsolicited. Treat as a connection error. The HTTP/2
// spec does not require this, but there is no legitimate reason to
// receive an unsolicited SETTINGS ack on a connection. Either the peer
// is buggy or malicious, and we're not going to tolerate such
// nonsense.
// Note that nghttp2 currently prevents this from happening for SETTINGS
// frames, so this block is purely defensive just in case that behavior
// changes. Specifically, unlike unsolicited PING acks, unsolicited
// SETTINGS acks should *never* make it this far.
Isolate* isolate = env()->isolate();
HandleScope scope(isolate);
Local<Context> context = env()->context();
Context::Scope context_scope(context);
Local<Value> arg = Integer::New(isolate, NGHTTP2_ERR_PROTO);
MakeCallback(env()->http2session_on_error_function(), 1, &arg);
}
// Callback used when data has been written to the stream.
void Http2Session::OnStreamAfterWrite(WriteWrap* w, int status) {
Debug(this, "write finished with status %d", status);
CHECK_NE(flags_ & SESSION_STATE_WRITE_IN_PROGRESS, 0);
flags_ &= ~SESSION_STATE_WRITE_IN_PROGRESS;
// Inform all pending writes about their completion.
ClearOutgoing(status);
if ((flags_ & SESSION_STATE_READING_STOPPED) &&
!(flags_ & SESSION_STATE_WRITE_IN_PROGRESS) &&
nghttp2_session_want_read(session_)) {
flags_ &= ~SESSION_STATE_READING_STOPPED;
stream_->ReadStart();
}
if ((flags_ & SESSION_STATE_CLOSED) != 0) {
HandleScope scope(env()->isolate());
MakeCallback(env()->ondone_string(), 0, nullptr);
return;
}
// If there is more incoming data queued up, consume it.
if (stream_buf_offset_ > 0) {
ConsumeHTTP2Data();
}
if (!(flags_ & SESSION_STATE_WRITE_SCHEDULED)) {
// Schedule a new write if nghttp2 wants to send data.
MaybeScheduleWrite();
}
}
// If the underlying nghttp2_session struct has data pending in its outbound
// queue, MaybeScheduleWrite will schedule a SendPendingData() call to occur
// on the next iteration of the Node.js event loop (using the SetImmediate
// queue), but only if a write has not already been scheduled.
void Http2Session::MaybeScheduleWrite() {
CHECK_EQ(flags_ & SESSION_STATE_WRITE_SCHEDULED, 0);
if (UNLIKELY(session_ == nullptr))
return;
if (nghttp2_session_want_write(session_)) {
HandleScope handle_scope(env()->isolate());
Debug(this, "scheduling write");
flags_ |= SESSION_STATE_WRITE_SCHEDULED;
BaseObjectPtr<Http2Session> strong_ref{this};
env()->SetImmediate([this, strong_ref](Environment* env) {
if (session_ == nullptr || !(flags_ & SESSION_STATE_WRITE_SCHEDULED)) {
// This can happen e.g. when a stream was reset before this turn
// of the event loop, in which case SendPendingData() is called early,
// or the session was destroyed in the meantime.
return;
}
// Sending data may call arbitrary JS code, so keep track of
// async context.
HandleScope handle_scope(env->isolate());
InternalCallbackScope callback_scope(this);
SendPendingData();
});
}
}
void Http2Session::MaybeStopReading() {
if (flags_ & SESSION_STATE_READING_STOPPED) return;
int want_read = nghttp2_session_want_read(session_);
Debug(this, "wants read? %d", want_read);
if (want_read == 0 || (flags_ & SESSION_STATE_WRITE_IN_PROGRESS)) {
flags_ |= SESSION_STATE_READING_STOPPED;
stream_->ReadStop();
}
}
// Unset the sending state, finish up all current writes, and reset
// storage for data and metadata that was associated with these writes.
void Http2Session::ClearOutgoing(int status) {
CHECK_NE(flags_ & SESSION_STATE_SENDING, 0);
flags_ &= ~SESSION_STATE_SENDING;
if (outgoing_buffers_.size() > 0) {
outgoing_storage_.clear();
outgoing_length_ = 0;
std::vector<nghttp2_stream_write> current_outgoing_buffers_;
current_outgoing_buffers_.swap(outgoing_buffers_);
for (const nghttp2_stream_write& wr : current_outgoing_buffers_) {
WriteWrap* wrap = wr.req_wrap;
if (wrap != nullptr) {
// TODO(addaleax): Pass `status` instead of 0, so that we actually error
// out with the error from the write to the underlying protocol,
// if one occurred.
wrap->Done(0);
}
}
}
// Now that we've finished sending queued data, if there are any pending
// RstStreams we should try sending again and then flush them one by one.
if (pending_rst_streams_.size() > 0) {
std::vector<int32_t> current_pending_rst_streams;
pending_rst_streams_.swap(current_pending_rst_streams);
SendPendingData();
for (int32_t stream_id : current_pending_rst_streams) {
Http2Stream* stream = FindStream(stream_id);
if (LIKELY(stream != nullptr))
stream->FlushRstStream();
}
}
}
void Http2Session::PushOutgoingBuffer(nghttp2_stream_write&& write) {
outgoing_length_ += write.buf.len;
outgoing_buffers_.emplace_back(std::move(write));
}
// Queue a given block of data for sending. This always creates a copy,
// so it is used for the cases in which nghttp2 requests sending of a
// small chunk of data.
void Http2Session::CopyDataIntoOutgoing(const uint8_t* src, size_t src_length) {
size_t offset = outgoing_storage_.size();
outgoing_storage_.resize(offset + src_length);
memcpy(&outgoing_storage_[offset], src, src_length);
// Store with a base of `nullptr` initially, since future resizes
// of the outgoing_buffers_ vector may invalidate the pointer.
// The correct base pointers will be set later, before writing to the
// underlying socket.
PushOutgoingBuffer(nghttp2_stream_write {
uv_buf_init(nullptr, src_length)
});
}
// Prompts nghttp2 to begin serializing it's pending data and pushes each
// chunk out to the i/o socket to be sent. This is a particularly hot method
// that will generally be called at least twice be event loop iteration.
// This is a potential performance optimization target later.
// Returns non-zero value if a write is already in progress.
uint8_t Http2Session::SendPendingData() {
Debug(this, "sending pending data");
// Do not attempt to send data on the socket if the destroying flag has
// been set. That means everything is shutting down and the socket
// will not be usable.
if (IsDestroyed())
return 0;
flags_ &= ~SESSION_STATE_WRITE_SCHEDULED;
// SendPendingData should not be called recursively.
if (flags_ & SESSION_STATE_SENDING)
return 1;
// This is cleared by ClearOutgoing().
flags_ |= SESSION_STATE_SENDING;
ssize_t src_length;
const uint8_t* src;
CHECK_EQ(outgoing_buffers_.size(), 0);
CHECK_EQ(outgoing_storage_.size(), 0);
// Part One: Gather data from nghttp2
while ((src_length = nghttp2_session_mem_send(session_, &src)) > 0) {
Debug(this, "nghttp2 has %d bytes to send", src_length);
CopyDataIntoOutgoing(src, src_length);
}
CHECK_NE(src_length, NGHTTP2_ERR_NOMEM);
if (stream_ == nullptr) {
// It would seem nice to bail out earlier, but `nghttp2_session_mem_send()`
// does take care of things like closing the individual streams after
// a socket has been torn down, so we still need to call it.
ClearOutgoing(UV_ECANCELED);
return 0;
}
// Part Two: Pass Data to the underlying stream
size_t count = outgoing_buffers_.size();
if (count == 0) {
ClearOutgoing(0);
return 0;
}
MaybeStackBuffer<uv_buf_t, 32> bufs;
bufs.AllocateSufficientStorage(count);
// Set the buffer base pointers for copied data that ended up in the
// sessions's own storage since it might have shifted around during gathering.
// (Those are marked by having .base == nullptr.)
size_t offset = 0;
size_t i = 0;
for (const nghttp2_stream_write& write : outgoing_buffers_) {
statistics_.data_sent += write.buf.len;
if (write.buf.base == nullptr) {
bufs[i++] = uv_buf_init(
reinterpret_cast<char*>(outgoing_storage_.data() + offset),
write.buf.len);
offset += write.buf.len;
} else {
bufs[i++] = write.buf;
}
}
chunks_sent_since_last_write_++;
CHECK_EQ(flags_ & SESSION_STATE_WRITE_IN_PROGRESS, 0);
flags_ |= SESSION_STATE_WRITE_IN_PROGRESS;
StreamWriteResult res = underlying_stream()->Write(*bufs, count);
if (!res.async) {
flags_ &= ~SESSION_STATE_WRITE_IN_PROGRESS;
ClearOutgoing(res.err);
}
MaybeStopReading();
return 0;
}
// This callback is called from nghttp2 when it wants to send DATA frames for a
// given Http2Stream, when we set the `NGHTTP2_DATA_FLAG_NO_COPY` flag earlier
// in the Http2Stream::Provider::Stream::OnRead callback.
// We take the write information directly out of the stream's data queue.
int Http2Session::OnSendData(
nghttp2_session* session_,
nghttp2_frame* frame,
const uint8_t* framehd,
size_t length,
nghttp2_data_source* source,
void* user_data) {
Http2Session* session = static_cast<Http2Session*>(user_data);
Http2Stream* stream = GetStream(session, frame->hd.stream_id, source);
// Send the frame header + a byte that indicates padding length.
session->CopyDataIntoOutgoing(framehd, 9);
if (frame->data.padlen > 0) {
uint8_t padding_byte = frame->data.padlen - 1;
CHECK_EQ(padding_byte, frame->data.padlen - 1);
session->CopyDataIntoOutgoing(&padding_byte, 1);
}
Debug(session, "nghttp2 has %d bytes to send directly", length);
while (length > 0) {
// nghttp2 thinks that there is data available (length > 0), which means
// we told it so, which means that we *should* have data available.
CHECK(!stream->queue_.empty());
nghttp2_stream_write& write = stream->queue_.front();
if (write.buf.len <= length) {
// This write does not suffice by itself, so we can consume it completely.
length -= write.buf.len;
session->PushOutgoingBuffer(std::move(write));
stream->queue_.pop();
continue;
}
// Slice off `length` bytes of the first write in the queue.
session->PushOutgoingBuffer(nghttp2_stream_write {
uv_buf_init(write.buf.base, length)
});
write.buf.base += length;
write.buf.len -= length;
break;
}
if (frame->data.padlen > 0) {
// Send padding if that was requested.
session->PushOutgoingBuffer(nghttp2_stream_write {
uv_buf_init(const_cast<char*>(zero_bytes_256), frame->data.padlen - 1)
});
}
return 0;
}
// Creates a new Http2Stream and submits a new http2 request.
Http2Stream* Http2Session::SubmitRequest(
nghttp2_priority_spec* prispec,
nghttp2_nv* nva,
size_t len,
int32_t* ret,
int options) {
Debug(this, "submitting request");
Http2Scope h2scope(this);
Http2Stream* stream = nullptr;
Http2Stream::Provider::Stream prov(options);
*ret = nghttp2_submit_request(session_, prispec, nva, len, *prov, nullptr);
CHECK_NE(*ret, NGHTTP2_ERR_NOMEM);
if (LIKELY(*ret > 0))
stream = Http2Stream::New(this, *ret, NGHTTP2_HCAT_HEADERS, options);
return stream;
}
uv_buf_t Http2Session::OnStreamAlloc(size_t suggested_size) {
return env()->AllocateManaged(suggested_size).release();
}
// Callback used to receive inbound data from the i/o stream
void Http2Session::OnStreamRead(ssize_t nread, const uv_buf_t& buf_) {
HandleScope handle_scope(env()->isolate());
Context::Scope context_scope(env()->context());
Http2Scope h2scope(this);
CHECK_NOT_NULL(stream_);
Debug(this, "receiving %d bytes, offset %d", nread, stream_buf_offset_);
AllocatedBuffer buf(env(), buf_);
// Only pass data on if nread > 0
if (nread <= 0) {
if (nread < 0) {
PassReadErrorToPreviousListener(nread);
}
return;
}
statistics_.data_received += nread;
if (LIKELY(stream_buf_offset_ == 0)) {
// Shrink to the actual amount of used data.
buf.Resize(nread);
IncrementCurrentSessionMemory(nread);
} else {
// This is a very unlikely case, and should only happen if the ReadStart()
// call in OnStreamAfterWrite() immediately provides data. If that does
// happen, we concatenate the data we received with the already-stored
// pending input data, slicing off the already processed part.
size_t pending_len = stream_buf_.len - stream_buf_offset_;
AllocatedBuffer new_buf = env()->AllocateManaged(pending_len + nread);
memcpy(new_buf.data(), stream_buf_.base + stream_buf_offset_, pending_len);
memcpy(new_buf.data() + pending_len, buf.data(), nread);
// The data in stream_buf_ is already accounted for, add nread received
// bytes to session memory but remove the already processed
// stream_buf_offset_ bytes.
IncrementCurrentSessionMemory(nread - stream_buf_offset_);
buf = std::move(new_buf);
nread = buf.size();
stream_buf_offset_ = 0;
stream_buf_ab_.Reset();
}
// Remember the current buffer, so that OnDataChunkReceived knows the
// offset of a DATA frame's data into the socket read buffer.
stream_buf_ = uv_buf_init(buf.data(), nread);
Isolate* isolate = env()->isolate();
// Store this so we can create an ArrayBuffer for read data from it.
// DATA frames will be emitted as slices of that ArrayBuffer to avoid having
// to copy memory.
stream_buf_allocation_ = std::move(buf);
ssize_t ret = ConsumeHTTP2Data();
if (UNLIKELY(ret < 0)) {
Debug(this, "fatal error receiving data: %d", ret);
Local<Value> arg = Integer::New(isolate, ret);
MakeCallback(env()->http2session_on_error_function(), 1, &arg);
return;
}
MaybeStopReading();
}
bool Http2Session::HasWritesOnSocketForStream(Http2Stream* stream) {
for (const nghttp2_stream_write& wr : outgoing_buffers_) {
if (wr.req_wrap != nullptr && wr.req_wrap->stream() == stream)
return true;
}
return false;
}
// Every Http2Session session is tightly bound to a single i/o StreamBase
// (typically a net.Socket or tls.TLSSocket). The lifecycle of the two is
// tightly coupled with all data transfer between the two happening at the
// C++ layer via the StreamBase API.
void Http2Session::Consume(Local<Object> stream_obj) {
StreamBase* stream = StreamBase::FromObject(stream_obj);
stream->PushStreamListener(this);
Debug(this, "i/o stream consumed");
}
Http2Stream* Http2Stream::New(Http2Session* session,
int32_t id,
nghttp2_headers_category category,
int options) {
Local<Object> obj;
if (!session->env()
->http2stream_constructor_template()
->NewInstance(session->env()->context())
.ToLocal(&obj)) {
return nullptr;
}
return new Http2Stream(session, obj, id, category, options);
}
Http2Stream::Http2Stream(Http2Session* session,
Local<Object> obj,
int32_t id,
nghttp2_headers_category category,
int options)
: AsyncWrap(session->env(), obj, AsyncWrap::PROVIDER_HTTP2STREAM),
StreamBase(session->env()),
session_(session),
id_(id),
current_headers_category_(category) {
MakeWeak();
StreamBase::AttachToObject(GetObject());
statistics_.start_time = uv_hrtime();
// Limit the number of header pairs
max_header_pairs_ = session->GetMaxHeaderPairs();
if (max_header_pairs_ == 0) {
max_header_pairs_ = DEFAULT_MAX_HEADER_LIST_PAIRS;
}
current_headers_.reserve(std::min(max_header_pairs_, 12u));
// Limit the number of header octets
max_header_length_ =
std::min(
nghttp2_session_get_local_settings(
session->session(),
NGHTTP2_SETTINGS_MAX_HEADER_LIST_SIZE),
MAX_MAX_HEADER_LIST_SIZE);
if (options & STREAM_OPTION_GET_TRAILERS)
flags_ |= NGHTTP2_STREAM_FLAG_TRAILERS;
PushStreamListener(&stream_listener_);
if (options & STREAM_OPTION_EMPTY_PAYLOAD)
Shutdown();
session->AddStream(this);
}
Http2Stream::~Http2Stream() {
for (nghttp2_header& header : current_headers_) {
nghttp2_rcbuf_decref(header.name);
nghttp2_rcbuf_decref(header.value);
}
if (!session_)
return;
Debug(this, "tearing down stream");
session_->DecrementCurrentSessionMemory(current_headers_length_);
session_->RemoveStream(this);
}
std::string Http2Stream::diagnostic_name() const {
return "HttpStream " + std::to_string(id()) + " (" +
std::to_string(static_cast<int64_t>(get_async_id())) + ") [" +
session()->diagnostic_name() + "]";
}
// Notify the Http2Stream that a new block of HEADERS is being processed.
void Http2Stream::StartHeaders(nghttp2_headers_category category) {
Debug(this, "starting headers, category: %d", category);
CHECK(!this->IsDestroyed());
session_->DecrementCurrentSessionMemory(current_headers_length_);
current_headers_length_ = 0;
current_headers_.clear();
current_headers_category_ = category;
}
nghttp2_stream* Http2Stream::operator*() {
return nghttp2_session_find_stream(**session_, id_);
}
void Http2Stream::Close(int32_t code) {
CHECK(!this->IsDestroyed());
flags_ |= NGHTTP2_STREAM_FLAG_CLOSED;
code_ = code;
Debug(this, "closed with code %d", code);
}
ShutdownWrap* Http2Stream::CreateShutdownWrap(v8::Local<v8::Object> object) {
// DoShutdown() always finishes synchronously, so there's no need to create
// a structure to store asynchronous context.
return nullptr;
}
int Http2Stream::DoShutdown(ShutdownWrap* req_wrap) {
if (IsDestroyed())
return UV_EPIPE;
{
Http2Scope h2scope(this);
flags_ |= NGHTTP2_STREAM_FLAG_SHUT;
CHECK_NE(nghttp2_session_resume_data(**session_, id_),
NGHTTP2_ERR_NOMEM);
Debug(this, "writable side shutdown");
}
return 1;
}
// Destroy the Http2Stream and render it unusable. Actual resources for the
// Stream will not be freed until the next tick of the Node.js event loop
// using the SetImmediate queue.
void Http2Stream::Destroy() {
// Do nothing if this stream instance is already destroyed
if (IsDestroyed())
return;
if (session_->HasPendingRstStream(id_))
FlushRstStream();
flags_ |= NGHTTP2_STREAM_FLAG_DESTROYED;
Debug(this, "destroying stream");
// Wait until the start of the next loop to delete because there
// may still be some pending operations queued for this stream.
BaseObjectPtr<Http2Stream> strong_ref{this};
env()->SetImmediate([this, strong_ref](Environment* env) {
// Free any remaining outgoing data chunks here. This should be done
// here because it's possible for destroy to have been called while
// we still have queued outbound writes.
while (!queue_.empty()) {
nghttp2_stream_write& head = queue_.front();
if (head.req_wrap != nullptr)
head.req_wrap->Done(UV_ECANCELED);
queue_.pop();
}
// We can destroy the stream now if there are no writes for it
// already on the socket. Otherwise, we'll wait for the garbage collector
// to take care of cleaning up.
if (session() == nullptr || !session()->HasWritesOnSocketForStream(this)) {
// Delete once strong_ref goes out of scope.
Detach();
}
});
statistics_.end_time = uv_hrtime();
session_->statistics_.stream_average_duration =
((statistics_.end_time - statistics_.start_time) /
session_->statistics_.stream_count) / 1e6;
EmitStatistics();
}
// Initiates a response on the Http2Stream using data provided via the
// StreamBase Streams API.
int Http2Stream::SubmitResponse(nghttp2_nv* nva, size_t len, int options) {
CHECK(!this->IsDestroyed());
Http2Scope h2scope(this);
Debug(this, "submitting response");
if (options & STREAM_OPTION_GET_TRAILERS)
flags_ |= NGHTTP2_STREAM_FLAG_TRAILERS;
if (!IsWritable())
options |= STREAM_OPTION_EMPTY_PAYLOAD;
Http2Stream::Provider::Stream prov(this, options);
int ret = nghttp2_submit_response(**session_, id_, nva, len, *prov);
CHECK_NE(ret, NGHTTP2_ERR_NOMEM);
return ret;
}
// Submit informational headers for a stream.
int Http2Stream::SubmitInfo(nghttp2_nv* nva, size_t len) {
CHECK(!this->IsDestroyed());
Http2Scope h2scope(this);
Debug(this, "sending %d informational headers", len);
int ret = nghttp2_submit_headers(**session_,
NGHTTP2_FLAG_NONE,
id_, nullptr,
nva, len, nullptr);
CHECK_NE(ret, NGHTTP2_ERR_NOMEM);
return ret;
}
void Http2Stream::OnTrailers() {
Debug(this, "let javascript know we are ready for trailers");
CHECK(!this->IsDestroyed());
Isolate* isolate = env()->isolate();
HandleScope scope(isolate);
Local<Context> context = env()->context();
Context::Scope context_scope(context);
flags_ &= ~NGHTTP2_STREAM_FLAG_TRAILERS;
MakeCallback(env()->http2session_on_stream_trailers_function(), 0, nullptr);
}
// Submit informational headers for a stream.
int Http2Stream::SubmitTrailers(nghttp2_nv* nva, size_t len) {
CHECK(!this->IsDestroyed());
Http2Scope h2scope(this);
Debug(this, "sending %d trailers", len);
int ret;
// Sending an empty trailers frame poses problems in Safari, Edge & IE.
// Instead we can just send an empty data frame with NGHTTP2_FLAG_END_STREAM
// to indicate that the stream is ready to be closed.
if (len == 0) {
Http2Stream::Provider::Stream prov(this, 0);
ret = nghttp2_submit_data(**session_, NGHTTP2_FLAG_END_STREAM, id_, *prov);
} else {
ret = nghttp2_submit_trailer(**session_, id_, nva, len);
}
CHECK_NE(ret, NGHTTP2_ERR_NOMEM);
return ret;
}
// Submit a PRIORITY frame to the connected peer.
int Http2Stream::SubmitPriority(nghttp2_priority_spec* prispec,
bool silent) {
CHECK(!this->IsDestroyed());
Http2Scope h2scope(this);
Debug(this, "sending priority spec");
int ret = silent ?
nghttp2_session_change_stream_priority(**session_,
id_, prispec) :
nghttp2_submit_priority(**session_,
NGHTTP2_FLAG_NONE,
id_, prispec);
CHECK_NE(ret, NGHTTP2_ERR_NOMEM);
return ret;
}
// Closes the Http2Stream by submitting an RST_STREAM frame to the connected
// peer.
void Http2Stream::SubmitRstStream(const uint32_t code) {
CHECK(!this->IsDestroyed());
code_ = code;
// If possible, force a purge of any currently pending data here to make sure
// it is sent before closing the stream. If it returns non-zero then we need
// to wait until the current write finishes and try again to avoid nghttp2
// behaviour where it prioritizes RstStream over everything else.
if (session_->SendPendingData() != 0) {
session_->AddPendingRstStream(id_);
return;
}
FlushRstStream();
}
void Http2Stream::FlushRstStream() {
if (IsDestroyed())
return;
Http2Scope h2scope(this);
CHECK_EQ(nghttp2_submit_rst_stream(**session_, NGHTTP2_FLAG_NONE,
id_, code_), 0);
}
// Submit a push promise and create the associated Http2Stream if successful.
Http2Stream* Http2Stream::SubmitPushPromise(nghttp2_nv* nva,
size_t len,
int32_t* ret,
int options) {
CHECK(!this->IsDestroyed());
Http2Scope h2scope(this);
Debug(this, "sending push promise");
*ret = nghttp2_submit_push_promise(**session_, NGHTTP2_FLAG_NONE,
id_, nva, len, nullptr);
CHECK_NE(*ret, NGHTTP2_ERR_NOMEM);
Http2Stream* stream = nullptr;
if (*ret > 0) {
stream = Http2Stream::New(
session_.get(), *ret, NGHTTP2_HCAT_HEADERS, options);
}
return stream;
}
// Switch the StreamBase into flowing mode to begin pushing chunks of data
// out to JS land.
int Http2Stream::ReadStart() {
Http2Scope h2scope(this);
CHECK(!this->IsDestroyed());
flags_ |= NGHTTP2_STREAM_FLAG_READ_START;
flags_ &= ~NGHTTP2_STREAM_FLAG_READ_PAUSED;
Debug(this, "reading starting");
// Tell nghttp2 about our consumption of the data that was handed
// off to JS land.
nghttp2_session_consume_stream(**session_,
id_,
inbound_consumed_data_while_paused_);
inbound_consumed_data_while_paused_ = 0;
return 0;
}
// Switch the StreamBase into paused mode.
int Http2Stream::ReadStop() {
CHECK(!this->IsDestroyed());
if (!IsReading())
return 0;
flags_ |= NGHTTP2_STREAM_FLAG_READ_PAUSED;
Debug(this, "reading stopped");
return 0;
}
// The Http2Stream class is a subclass of StreamBase. The DoWrite method
// receives outbound chunks of data to send as outbound DATA frames. These
// are queued in an internal linked list of uv_buf_t structs that are sent
// when nghttp2 is ready to serialize the data frame.
//
// Queue the given set of uv_but_t handles for writing to an
// nghttp2_stream. The WriteWrap's Done callback will be invoked once the
// chunks of data have been flushed to the underlying nghttp2_session.
// Note that this does *not* mean that the data has been flushed
// to the socket yet.
int Http2Stream::DoWrite(WriteWrap* req_wrap,
uv_buf_t* bufs,
size_t nbufs,
uv_stream_t* send_handle) {
CHECK_NULL(send_handle);
Http2Scope h2scope(this);
if (!IsWritable() || IsDestroyed()) {
req_wrap->Done(UV_EOF);
return 0;
}
Debug(this, "queuing %d buffers to send", nbufs);
for (size_t i = 0; i < nbufs; ++i) {
// Store the req_wrap on the last write info in the queue, so that it is
// only marked as finished once all buffers associated with it are finished.
queue_.emplace(nghttp2_stream_write {
i == nbufs - 1 ? req_wrap : nullptr,
bufs[i]
});
IncrementAvailableOutboundLength(bufs[i].len);
}
CHECK_NE(nghttp2_session_resume_data(**session_, id_), NGHTTP2_ERR_NOMEM);
return 0;
}
// Ads a header to the Http2Stream. Note that the header name and value are
// provided using a buffer structure provided by nghttp2 that allows us to
// avoid unnecessary memcpy's. Those buffers are ref counted. The ref count
// is incremented here and are decremented when the header name and values
// are garbage collected later.
bool Http2Stream::AddHeader(nghttp2_rcbuf* name,
nghttp2_rcbuf* value,
uint8_t flags) {
CHECK(!this->IsDestroyed());
if (this->statistics_.first_header == 0)
this->statistics_.first_header = uv_hrtime();
size_t name_len = nghttp2_rcbuf_get_buf(name).len;
if (name_len == 0) return true; // Ignore headers with empty names.
size_t value_len = nghttp2_rcbuf_get_buf(value).len;
size_t length = name_len + value_len + 32;
// A header can only be added if we have not exceeded the maximum number
// of headers and the session has memory available for it.
if (!session_->IsAvailableSessionMemory(length) ||
current_headers_.size() == max_header_pairs_ ||
current_headers_length_ + length > max_header_length_) {
return false;
}
nghttp2_header header;
header.name = name;
header.value = value;
header.flags = flags;
current_headers_.push_back(header);
nghttp2_rcbuf_incref(name);
nghttp2_rcbuf_incref(value);
current_headers_length_ += length;
session_->IncrementCurrentSessionMemory(length);
return true;
}
// A Provider is the thing that provides outbound DATA frame data.
Http2Stream::Provider::Provider(Http2Stream* stream, int options) {
CHECK(!stream->IsDestroyed());
provider_.source.ptr = stream;
empty_ = options & STREAM_OPTION_EMPTY_PAYLOAD;
}
Http2Stream::Provider::Provider(int options) {
provider_.source.ptr = nullptr;
empty_ = options & STREAM_OPTION_EMPTY_PAYLOAD;
}
Http2Stream::Provider::~Provider() {
provider_.source.ptr = nullptr;
}
// The Stream Provider pulls data from a linked list of uv_buf_t structs
// built via the StreamBase API and the Streams js API.
Http2Stream::Provider::Stream::Stream(int options)
: Http2Stream::Provider(options) {
provider_.read_callback = Http2Stream::Provider::Stream::OnRead;
}
Http2Stream::Provider::Stream::Stream(Http2Stream* stream, int options)
: Http2Stream::Provider(stream, options) {
provider_.read_callback = Http2Stream::Provider::Stream::OnRead;
}
ssize_t Http2Stream::Provider::Stream::OnRead(nghttp2_session* handle,
int32_t id,
uint8_t* buf,
size_t length,
uint32_t* flags,
nghttp2_data_source* source,
void* user_data) {
Http2Session* session = static_cast<Http2Session*>(user_data);
Debug(session, "reading outbound data for stream %d", id);
Http2Stream* stream = GetStream(session, id, source);
if (stream->statistics_.first_byte_sent == 0)
stream->statistics_.first_byte_sent = uv_hrtime();
CHECK_EQ(id, stream->id());
size_t amount = 0; // amount of data being sent in this data frame.
// Remove all empty chunks from the head of the queue.
// This is done here so that .write('', cb) is still a meaningful way to
// find out when the HTTP2 stream wants to consume data, and because the
// StreamBase API allows empty input chunks.
while (!stream->queue_.empty() && stream->queue_.front().buf.len == 0) {
WriteWrap* finished = stream->queue_.front().req_wrap;
stream->queue_.pop();
if (finished != nullptr)
finished->Done(0);
}
if (!stream->queue_.empty()) {
Debug(session, "stream %d has pending outbound data", id);
amount = std::min(stream->available_outbound_length_, length);
Debug(session, "sending %d bytes for data frame on stream %d", amount, id);
if (amount > 0) {
// Just return the length, let Http2Session::OnSendData take care of
// actually taking the buffers out of the queue.
*flags |= NGHTTP2_DATA_FLAG_NO_COPY;
stream->DecrementAvailableOutboundLength(amount);
}
}
if (amount == 0 && stream->IsWritable()) {
CHECK(stream->queue_.empty());
Debug(session, "deferring stream %d", id);
stream->EmitWantsWrite(length);
if (stream->available_outbound_length_ > 0 || !stream->IsWritable()) {
// EmitWantsWrite() did something interesting synchronously, restart:
return OnRead(handle, id, buf, length, flags, source, user_data);
}
return NGHTTP2_ERR_DEFERRED;
}
if (stream->queue_.empty() && !stream->IsWritable()) {
Debug(session, "no more data for stream %d", id);
*flags |= NGHTTP2_DATA_FLAG_EOF;
if (stream->HasTrailers()) {
*flags |= NGHTTP2_DATA_FLAG_NO_END_STREAM;
stream->OnTrailers();
}
}
stream->statistics_.sent_bytes += amount;
return amount;
}
inline void Http2Stream::IncrementAvailableOutboundLength(size_t amount) {
available_outbound_length_ += amount;
session_->IncrementCurrentSessionMemory(amount);
}
inline void Http2Stream::DecrementAvailableOutboundLength(size_t amount) {
available_outbound_length_ -= amount;
session_->DecrementCurrentSessionMemory(amount);
}
// Implementation of the JavaScript API
// Fetches the string description of a nghttp2 error code and passes that
// back to JS land
void HttpErrorString(const FunctionCallbackInfo<Value>& args) {
Environment* env = Environment::GetCurrent(args);
uint32_t val = args[0]->Uint32Value(env->context()).ToChecked();
args.GetReturnValue().Set(
String::NewFromOneByte(
env->isolate(),
reinterpret_cast<const uint8_t*>(nghttp2_strerror(val)),
NewStringType::kInternalized).ToLocalChecked());
}
// Serializes the settings object into a Buffer instance that
// would be suitable, for instance, for creating the Base64
// output for an HTTP2-Settings header field.
void PackSettings(const FunctionCallbackInfo<Value>& args) {
Environment* env = Environment::GetCurrent(args);
// TODO(addaleax): We should not be creating a full AsyncWrap for this.
Local<Object> obj;
if (!env->http2settings_constructor_template()
->NewInstance(env->context())
.ToLocal(&obj)) {
return;
}
Http2Session::Http2Settings settings(env, nullptr, obj);
args.GetReturnValue().Set(settings.Pack());
}
// A TypedArray instance is shared between C++ and JS land to contain the
// default SETTINGS. RefreshDefaultSettings updates that TypedArray with the
// default values.
void RefreshDefaultSettings(const FunctionCallbackInfo<Value>& args) {
Environment* env = Environment::GetCurrent(args);
Http2Session::Http2Settings::RefreshDefaults(env);
}
// Sets the next stream ID the Http2Session. If successful, returns true.
void Http2Session::SetNextStreamID(const FunctionCallbackInfo<Value>& args) {
Environment* env = Environment::GetCurrent(args);
Http2Session* session;
ASSIGN_OR_RETURN_UNWRAP(&session, args.Holder());
int32_t id = args[0]->Int32Value(env->context()).ToChecked();
if (nghttp2_session_set_next_stream_id(**session, id) < 0) {
Debug(session, "failed to set next stream id to %d", id);
return args.GetReturnValue().Set(false);
}
args.GetReturnValue().Set(true);
Debug(session, "set next stream id to %d", id);
}
// A TypedArray instance is shared between C++ and JS land to contain the
// SETTINGS (either remote or local). RefreshSettings updates the current
// values established for each of the settings so those can be read in JS land.
template <get_setting fn>
void Http2Session::RefreshSettings(const FunctionCallbackInfo<Value>& args) {
Environment* env = Environment::GetCurrent(args);
Http2Session* session;
ASSIGN_OR_RETURN_UNWRAP(&session, args.Holder());
Http2Settings::Update(env, session, fn);
Debug(session, "settings refreshed for session");
}
// A TypedArray instance is shared between C++ and JS land to contain state
// information of the current Http2Session. This updates the values in the
// TypedArray so those can be read in JS land.
void Http2Session::RefreshState(const FunctionCallbackInfo<Value>& args) {
Environment* env = Environment::GetCurrent(args);
Http2Session* session;
ASSIGN_OR_RETURN_UNWRAP(&session, args.Holder());
Debug(session, "refreshing state");
AliasedFloat64Array& buffer = env->http2_state()->session_state_buffer;
nghttp2_session* s = **session;
buffer[IDX_SESSION_STATE_EFFECTIVE_LOCAL_WINDOW_SIZE] =
nghttp2_session_get_effective_local_window_size(s);
buffer[IDX_SESSION_STATE_EFFECTIVE_RECV_DATA_LENGTH] =
nghttp2_session_get_effective_recv_data_length(s);
buffer[IDX_SESSION_STATE_NEXT_STREAM_ID] =
nghttp2_session_get_next_stream_id(s);
buffer[IDX_SESSION_STATE_LOCAL_WINDOW_SIZE] =
nghttp2_session_get_local_window_size(s);
buffer[IDX_SESSION_STATE_LAST_PROC_STREAM_ID] =
nghttp2_session_get_last_proc_stream_id(s);
buffer[IDX_SESSION_STATE_REMOTE_WINDOW_SIZE] =
nghttp2_session_get_remote_window_size(s);
buffer[IDX_SESSION_STATE_OUTBOUND_QUEUE_SIZE] =
nghttp2_session_get_outbound_queue_size(s);
buffer[IDX_SESSION_STATE_HD_DEFLATE_DYNAMIC_TABLE_SIZE] =
nghttp2_session_get_hd_deflate_dynamic_table_size(s);
buffer[IDX_SESSION_STATE_HD_INFLATE_DYNAMIC_TABLE_SIZE] =
nghttp2_session_get_hd_inflate_dynamic_table_size(s);
}
// Constructor for new Http2Session instances.
void Http2Session::New(const FunctionCallbackInfo<Value>& args) {
Environment* env = Environment::GetCurrent(args);
CHECK(args.IsConstructCall());
int val = args[0]->IntegerValue(env->context()).ToChecked();
nghttp2_session_type type = static_cast<nghttp2_session_type>(val);
Http2Session* session = new Http2Session(env, args.This(), type);
session->get_async_id(); // avoid compiler warning
Debug(session, "session created");
}
// Binds the Http2Session with a StreamBase used for i/o
void Http2Session::Consume(const FunctionCallbackInfo<Value>& args) {
Http2Session* session;
ASSIGN_OR_RETURN_UNWRAP(&session, args.Holder());
CHECK(args[0]->IsObject());
session->Consume(args[0].As<Object>());
}
// Destroys the Http2Session instance and renders it unusable
void Http2Session::Destroy(const FunctionCallbackInfo<Value>& args) {
Http2Session* session;
ASSIGN_OR_RETURN_UNWRAP(&session, args.Holder());
Debug(session, "destroying session");
Environment* env = Environment::GetCurrent(args);
Local<Context> context = env->context();
uint32_t code = args[0]->Uint32Value(context).ToChecked();
bool socketDestroyed = args[1]->BooleanValue(env->isolate());
session->Close(code, socketDestroyed);
}
// Submits a new request on the Http2Session and returns either an error code
// or the Http2Stream object.
void Http2Session::Request(const FunctionCallbackInfo<Value>& args) {
Http2Session* session;
ASSIGN_OR_RETURN_UNWRAP(&session, args.Holder());
Environment* env = session->env();
Local<Context> context = env->context();
Isolate* isolate = env->isolate();
Local<Array> headers = args[0].As<Array>();
int options = args[1]->IntegerValue(context).ToChecked();
Http2Priority priority(env, args[2], args[3], args[4]);
Headers list(isolate, context, headers);
Debug(session, "request submitted");
int32_t ret = 0;
Http2Stream* stream =
session->Http2Session::SubmitRequest(*priority, *list, list.length(),
&ret, options);
if (ret <= 0 || stream == nullptr) {
Debug(session, "could not submit request: %s", nghttp2_strerror(ret));
return args.GetReturnValue().Set(ret);
}
Debug(session, "request submitted, new stream id %d", stream->id());
args.GetReturnValue().Set(stream->object());
}
// Submits a GOAWAY frame to signal that the Http2Session is in the process
// of shutting down. Note that this function does not actually alter the
// state of the Http2Session, it's simply a notification.
void Http2Session::Goaway(uint32_t code,
int32_t lastStreamID,
const uint8_t* data,
size_t len) {
if (IsDestroyed())
return;
Http2Scope h2scope(this);
// the last proc stream id is the most recently created Http2Stream.
if (lastStreamID <= 0)
lastStreamID = nghttp2_session_get_last_proc_stream_id(session_);
Debug(this, "submitting goaway");
nghttp2_submit_goaway(session_, NGHTTP2_FLAG_NONE,
lastStreamID, code, data, len);
}
// Submits a GOAWAY frame to signal that the Http2Session is in the process
// of shutting down. The opaque data argument is an optional TypedArray that
// can be used to send debugging data to the connected peer.
void Http2Session::Goaway(const FunctionCallbackInfo<Value>& args) {
Environment* env = Environment::GetCurrent(args);
Local<Context> context = env->context();
Http2Session* session;
ASSIGN_OR_RETURN_UNWRAP(&session, args.Holder());
uint32_t code = args[0]->Uint32Value(context).ToChecked();
int32_t lastStreamID = args[1]->Int32Value(context).ToChecked();
ArrayBufferViewContents<uint8_t> opaque_data;
if (args[2]->IsArrayBufferView()) {
opaque_data.Read(args[2].As<ArrayBufferView>());
}
session->Goaway(code, lastStreamID, opaque_data.data(), opaque_data.length());
}
// Update accounting of data chunks. This is used primarily to manage timeout
// logic when using the FD Provider.
void Http2Session::UpdateChunksSent(const FunctionCallbackInfo<Value>& args) {
Environment* env = Environment::GetCurrent(args);
Isolate* isolate = env->isolate();
HandleScope scope(isolate);
Http2Session* session;
ASSIGN_OR_RETURN_UNWRAP(&session, args.Holder());
uint32_t length = session->chunks_sent_since_last_write_;
session->object()->Set(env->context(),
env->chunks_sent_since_last_write_string(),
Integer::NewFromUnsigned(isolate, length)).Check();
args.GetReturnValue().Set(length);
}
// Submits an RST_STREAM frame effectively closing the Http2Stream. Note that
// this *WILL* alter the state of the stream, causing the OnStreamClose
// callback to the triggered.
void Http2Stream::RstStream(const FunctionCallbackInfo<Value>& args) {
Environment* env = Environment::GetCurrent(args);
Local<Context> context = env->context();
Http2Stream* stream;
ASSIGN_OR_RETURN_UNWRAP(&stream, args.Holder());
uint32_t code = args[0]->Uint32Value(context).ToChecked();
Debug(stream, "sending rst_stream with code %d", code);
stream->SubmitRstStream(code);
}
// Initiates a response on the Http2Stream using the StreamBase API to provide
// outbound DATA frames.
void Http2Stream::Respond(const FunctionCallbackInfo<Value>& args) {
Environment* env = Environment::GetCurrent(args);
Local<Context> context = env->context();
Isolate* isolate = env->isolate();
Http2Stream* stream;
ASSIGN_OR_RETURN_UNWRAP(&stream, args.Holder());
Local<Array> headers = args[0].As<Array>();
int options = args[1]->IntegerValue(context).ToChecked();
Headers list(isolate, context, headers);
args.GetReturnValue().Set(
stream->SubmitResponse(*list, list.length(), options));
Debug(stream, "response submitted");
}
// Submits informational headers on the Http2Stream
void Http2Stream::Info(const FunctionCallbackInfo<Value>& args) {
Environment* env = Environment::GetCurrent(args);
Local<Context> context = env->context();
Isolate* isolate = env->isolate();
Http2Stream* stream;
ASSIGN_OR_RETURN_UNWRAP(&stream, args.Holder());
Local<Array> headers = args[0].As<Array>();
Headers list(isolate, context, headers);
args.GetReturnValue().Set(stream->SubmitInfo(*list, list.length()));
Debug(stream, "%d informational headers sent", list.length());
}
// Submits trailing headers on the Http2Stream
void Http2Stream::Trailers(const FunctionCallbackInfo<Value>& args) {
Environment* env = Environment::GetCurrent(args);
Local<Context> context = env->context();
Isolate* isolate = env->isolate();
Http2Stream* stream;
ASSIGN_OR_RETURN_UNWRAP(&stream, args.Holder());
Local<Array> headers = args[0].As<Array>();
Headers list(isolate, context, headers);
args.GetReturnValue().Set(stream->SubmitTrailers(*list, list.length()));
Debug(stream, "%d trailing headers sent", list.length());
}
// Grab the numeric id of the Http2Stream
void Http2Stream::GetID(const FunctionCallbackInfo<Value>& args) {
Http2Stream* stream;
ASSIGN_OR_RETURN_UNWRAP(&stream, args.Holder());
args.GetReturnValue().Set(stream->id());
}
// Destroy the Http2Stream, rendering it no longer usable
void Http2Stream::Destroy(const FunctionCallbackInfo<Value>& args) {
Http2Stream* stream;
ASSIGN_OR_RETURN_UNWRAP(&stream, args.Holder());
Debug(stream, "destroying stream");
stream->Destroy();
}
// Initiate a Push Promise and create the associated Http2Stream
void Http2Stream::PushPromise(const FunctionCallbackInfo<Value>& args) {
Environment* env = Environment::GetCurrent(args);
Local<Context> context = env->context();
Isolate* isolate = env->isolate();
Http2Stream* parent;
ASSIGN_OR_RETURN_UNWRAP(&parent, args.Holder());
Local<Array> headers = args[0].As<Array>();
int options = args[1]->IntegerValue(context).ToChecked();
Headers list(isolate, context, headers);
Debug(parent, "creating push promise");
int32_t ret = 0;
Http2Stream* stream = parent->SubmitPushPromise(*list, list.length(),
&ret, options);
if (ret <= 0 || stream == nullptr) {
Debug(parent, "failed to create push stream: %d", ret);
return args.GetReturnValue().Set(ret);
}
Debug(parent, "push stream %d created", stream->id());
args.GetReturnValue().Set(stream->object());
}
// Send a PRIORITY frame
void Http2Stream::Priority(const FunctionCallbackInfo<Value>& args) {
Environment* env = Environment::GetCurrent(args);
Http2Stream* stream;
ASSIGN_OR_RETURN_UNWRAP(&stream, args.Holder());
Http2Priority priority(env, args[0], args[1], args[2]);
bool silent = args[3]->BooleanValue(env->isolate());
CHECK_EQ(stream->SubmitPriority(*priority, silent), 0);
Debug(stream, "priority submitted");
}
// A TypedArray shared by C++ and JS land is used to communicate state
// information about the Http2Stream. This updates the values in that
// TypedArray so that the state can be read by JS.
void Http2Stream::RefreshState(const FunctionCallbackInfo<Value>& args) {
Environment* env = Environment::GetCurrent(args);
Http2Stream* stream;
ASSIGN_OR_RETURN_UNWRAP(&stream, args.Holder());
Debug(stream, "refreshing state");
AliasedFloat64Array& buffer = env->http2_state()->stream_state_buffer;
nghttp2_stream* str = **stream;
nghttp2_session* s = **(stream->session());
if (str == nullptr) {
buffer[IDX_STREAM_STATE] = NGHTTP2_STREAM_STATE_IDLE;
buffer[IDX_STREAM_STATE_WEIGHT] =
buffer[IDX_STREAM_STATE_SUM_DEPENDENCY_WEIGHT] =
buffer[IDX_STREAM_STATE_LOCAL_CLOSE] =
buffer[IDX_STREAM_STATE_REMOTE_CLOSE] =
buffer[IDX_STREAM_STATE_LOCAL_WINDOW_SIZE] = 0;
} else {
buffer[IDX_STREAM_STATE] =
nghttp2_stream_get_state(str);
buffer[IDX_STREAM_STATE_WEIGHT] =
nghttp2_stream_get_weight(str);
buffer[IDX_STREAM_STATE_SUM_DEPENDENCY_WEIGHT] =
nghttp2_stream_get_sum_dependency_weight(str);
buffer[IDX_STREAM_STATE_LOCAL_CLOSE] =
nghttp2_session_get_stream_local_close(s, stream->id());
buffer[IDX_STREAM_STATE_REMOTE_CLOSE] =
nghttp2_session_get_stream_remote_close(s, stream->id());
buffer[IDX_STREAM_STATE_LOCAL_WINDOW_SIZE] =
nghttp2_session_get_stream_local_window_size(s, stream->id());
}
}
void Http2Session::AltSvc(int32_t id,
uint8_t* origin,
size_t origin_len,
uint8_t* value,
size_t value_len) {
Http2Scope h2scope(this);
CHECK_EQ(nghttp2_submit_altsvc(session_, NGHTTP2_FLAG_NONE, id,
origin, origin_len, value, value_len), 0);
}
void Http2Session::Origin(nghttp2_origin_entry* ov, size_t count) {
Http2Scope h2scope(this);
CHECK_EQ(nghttp2_submit_origin(session_, NGHTTP2_FLAG_NONE, ov, count), 0);
}
// Submits an AltSvc frame to be sent to the connected peer.
void Http2Session::AltSvc(const FunctionCallbackInfo<Value>& args) {
Environment* env = Environment::GetCurrent(args);
Http2Session* session;
ASSIGN_OR_RETURN_UNWRAP(&session, args.Holder());
int32_t id = args[0]->Int32Value(env->context()).ToChecked();
// origin and value are both required to be ASCII, handle them as such.
Local<String> origin_str = args[1]->ToString(env->context()).ToLocalChecked();
Local<String> value_str = args[2]->ToString(env->context()).ToLocalChecked();
size_t origin_len = origin_str->Length();
size_t value_len = value_str->Length();
CHECK_LE(origin_len + value_len, 16382); // Max permitted for ALTSVC
// Verify that origin len != 0 if stream id == 0, or
// that origin len == 0 if stream id != 0
CHECK((origin_len != 0 && id == 0) || (origin_len == 0 && id != 0));
MaybeStackBuffer<uint8_t> origin(origin_len);
MaybeStackBuffer<uint8_t> value(value_len);
origin_str->WriteOneByte(env->isolate(), *origin);
value_str->WriteOneByte(env->isolate(), *value);
session->AltSvc(id, *origin, origin_len, *value, value_len);
}
void Http2Session::Origin(const FunctionCallbackInfo<Value>& args) {
Environment* env = Environment::GetCurrent(args);
Local<Context> context = env->context();
Http2Session* session;
ASSIGN_OR_RETURN_UNWRAP(&session, args.Holder());
Local<String> origin_string = args[0].As<String>();
int count = args[1]->IntegerValue(context).ToChecked();
Origins origins(env->isolate(),
env->context(),
origin_string,
count);
session->Origin(*origins, origins.length());
}
// Submits a PING frame to be sent to the connected peer.
void Http2Session::Ping(const FunctionCallbackInfo<Value>& args) {
Environment* env = Environment::GetCurrent(args);
Http2Session* session;
ASSIGN_OR_RETURN_UNWRAP(&session, args.Holder());
// A PING frame may have exactly 8 bytes of payload data. If not provided,
// then the current hrtime will be used as the payload.
ArrayBufferViewContents<uint8_t, 8> payload;
if (args[0]->IsArrayBufferView()) {
payload.Read(args[0].As<ArrayBufferView>());
CHECK_EQ(payload.length(), 8);
}
Local<Object> obj;
if (!env->http2ping_constructor_template()
->NewInstance(env->context())
.ToLocal(&obj)) {
return;
}
if (obj->Set(env->context(), env->ondone_string(), args[1]).IsNothing())
return;
Http2Ping* ping = session->AddPing(
MakeDetachedBaseObject<Http2Ping>(session, obj));
// To prevent abuse, we strictly limit the number of unacknowledged PING
// frames that may be sent at any given time. This is configurable in the
// Options when creating a Http2Session.
if (ping == nullptr) return args.GetReturnValue().Set(false);
// The Ping itself is an Async resource. When the acknowledgement is received,
// the callback will be invoked and a notification sent out to JS land. The
// notification will include the duration of the ping, allowing the round
// trip to be measured.
ping->Send(payload.data());
args.GetReturnValue().Set(true);
}
// Submits a SETTINGS frame for the Http2Session
void Http2Session::Settings(const FunctionCallbackInfo<Value>& args) {
Environment* env = Environment::GetCurrent(args);
Http2Session* session;
ASSIGN_OR_RETURN_UNWRAP(&session, args.Holder());
Local<Object> obj;
if (!env->http2settings_constructor_template()
->NewInstance(env->context())
.ToLocal(&obj)) {
return;
}
if (obj->Set(env->context(), env->ondone_string(), args[0]).IsNothing())
return;
Http2Settings* settings = session->AddSettings(
MakeDetachedBaseObject<Http2Settings>(session->env(), session, obj, 0));
if (settings == nullptr) return args.GetReturnValue().Set(false);
settings->Send();
args.GetReturnValue().Set(true);
}
BaseObjectPtr<Http2Session::Http2Ping> Http2Session::PopPing() {
BaseObjectPtr<Http2Ping> ping;
if (!outstanding_pings_.empty()) {
ping = std::move(outstanding_pings_.front());
outstanding_pings_.pop();
DecrementCurrentSessionMemory(sizeof(*ping));
}
return ping;
}
Http2Session::Http2Ping* Http2Session::AddPing(
BaseObjectPtr<Http2Session::Http2Ping> ping) {
if (outstanding_pings_.size() == max_outstanding_pings_) {
ping->Done(false);
return nullptr;
}
Http2Ping* ptr = ping.get();
outstanding_pings_.emplace(std::move(ping));
IncrementCurrentSessionMemory(sizeof(*ping));
return ptr;
}
BaseObjectPtr<Http2Session::Http2Settings> Http2Session::PopSettings() {
BaseObjectPtr<Http2Settings> settings;
if (!outstanding_settings_.empty()) {
settings = std::move(outstanding_settings_.front());
outstanding_settings_.pop();
DecrementCurrentSessionMemory(sizeof(*settings));
}
return settings;
}
Http2Session::Http2Settings* Http2Session::AddSettings(
BaseObjectPtr<Http2Session::Http2Settings> settings) {
if (outstanding_settings_.size() == max_outstanding_settings_) {
settings->Done(false);
return nullptr;
}
Http2Settings* ptr = settings.get();
outstanding_settings_.emplace(std::move(settings));
IncrementCurrentSessionMemory(sizeof(*settings));
return ptr;
}
Http2Session::Http2Ping::Http2Ping(Http2Session* session, Local<Object> obj)
: AsyncWrap(session->env(), obj, AsyncWrap::PROVIDER_HTTP2PING),
session_(session),
startTime_(uv_hrtime()) {
}
void Http2Session::Http2Ping::Send(const uint8_t* payload) {
CHECK_NOT_NULL(session_);
uint8_t data[8];
if (payload == nullptr) {
memcpy(&data, &startTime_, arraysize(data));
payload = data;
}
Http2Scope h2scope(session_);
CHECK_EQ(nghttp2_submit_ping(**session_, NGHTTP2_FLAG_NONE, payload), 0);
}
void Http2Session::Http2Ping::Done(bool ack, const uint8_t* payload) {
uint64_t duration_ns = uv_hrtime() - startTime_;
double duration_ms = duration_ns / 1e6;
if (session_ != nullptr) session_->statistics_.ping_rtt = duration_ns;
HandleScope handle_scope(env()->isolate());
Context::Scope context_scope(env()->context());
Local<Value> buf = Undefined(env()->isolate());
if (payload != nullptr) {
buf = Buffer::Copy(env()->isolate(),
reinterpret_cast<const char*>(payload),
8).ToLocalChecked();
}
Local<Value> argv[] = {
Boolean::New(env()->isolate(), ack),
Number::New(env()->isolate(), duration_ms),
buf
};
MakeCallback(env()->ondone_string(), arraysize(argv), argv);
}
void Http2Session::Http2Ping::DetachFromSession() {
session_ = nullptr;
}
void nghttp2_stream_write::MemoryInfo(MemoryTracker* tracker) const {
if (req_wrap != nullptr)
tracker->TrackField("req_wrap", req_wrap->GetAsyncWrap());
tracker->TrackField("buf", buf);
}
void nghttp2_header::MemoryInfo(MemoryTracker* tracker) const {
tracker->TrackFieldWithSize("name", nghttp2_rcbuf_get_buf(name).len);
tracker->TrackFieldWithSize("value", nghttp2_rcbuf_get_buf(value).len);
}
void SetCallbackFunctions(const FunctionCallbackInfo<Value>& args) {
Environment* env = Environment::GetCurrent(args);
CHECK_EQ(args.Length(), 11);
#define SET_FUNCTION(arg, name) \
CHECK(args[arg]->IsFunction()); \
env->set_http2session_on_ ## name ## _function(args[arg].As<Function>());
SET_FUNCTION(0, error)
SET_FUNCTION(1, priority)
SET_FUNCTION(2, settings)
SET_FUNCTION(3, ping)
SET_FUNCTION(4, headers)
SET_FUNCTION(5, frame_error)
SET_FUNCTION(6, goaway_data)
SET_FUNCTION(7, altsvc)
SET_FUNCTION(8, origin)
SET_FUNCTION(9, stream_trailers)
SET_FUNCTION(10, stream_close)
#undef SET_FUNCTION
}
// Set up the process.binding('http2') binding.
void Initialize(Local<Object> target,
Local<Value> unused,
Local<Context> context,
void* priv) {
Environment* env = Environment::GetCurrent(context);
Isolate* isolate = env->isolate();
HandleScope scope(isolate);
std::unique_ptr<Http2State> state(new Http2State(isolate));
#define SET_STATE_TYPEDARRAY(name, field) \
target->Set(context, \
FIXED_ONE_BYTE_STRING(isolate, (name)), \
(field)).FromJust()
// Initialize the buffer used to store the session state
SET_STATE_TYPEDARRAY(
"sessionState", state->session_state_buffer.GetJSArray());
// Initialize the buffer used to store the stream state
SET_STATE_TYPEDARRAY(
"streamState", state->stream_state_buffer.GetJSArray());
SET_STATE_TYPEDARRAY(
"settingsBuffer", state->settings_buffer.GetJSArray());
SET_STATE_TYPEDARRAY(
"optionsBuffer", state->options_buffer.GetJSArray());
SET_STATE_TYPEDARRAY(
"streamStats", state->stream_stats_buffer.GetJSArray());
SET_STATE_TYPEDARRAY(
"sessionStats", state->session_stats_buffer.GetJSArray());
#undef SET_STATE_TYPEDARRAY
env->set_http2_state(std::move(state));
NODE_DEFINE_CONSTANT(target, kBitfield);
NODE_DEFINE_CONSTANT(target, kSessionPriorityListenerCount);
NODE_DEFINE_CONSTANT(target, kSessionFrameErrorListenerCount);
NODE_DEFINE_CONSTANT(target, kSessionMaxInvalidFrames);
NODE_DEFINE_CONSTANT(target, kSessionMaxRejectedStreams);
NODE_DEFINE_CONSTANT(target, kSessionUint8FieldCount);
NODE_DEFINE_CONSTANT(target, kSessionHasRemoteSettingsListeners);
NODE_DEFINE_CONSTANT(target, kSessionRemoteSettingsIsUpToDate);
NODE_DEFINE_CONSTANT(target, kSessionHasPingListeners);
NODE_DEFINE_CONSTANT(target, kSessionHasAltsvcListeners);
// Method to fetch the nghttp2 string description of an nghttp2 error code
env->SetMethod(target, "nghttp2ErrorString", HttpErrorString);
Local<String> http2SessionClassName =
FIXED_ONE_BYTE_STRING(isolate, "Http2Session");
Local<FunctionTemplate> ping = FunctionTemplate::New(env->isolate());
ping->SetClassName(FIXED_ONE_BYTE_STRING(env->isolate(), "Http2Ping"));
ping->Inherit(AsyncWrap::GetConstructorTemplate(env));
Local<ObjectTemplate> pingt = ping->InstanceTemplate();
pingt->SetInternalFieldCount(1);
env->set_http2ping_constructor_template(pingt);
Local<FunctionTemplate> setting = FunctionTemplate::New(env->isolate());
setting->SetClassName(FIXED_ONE_BYTE_STRING(env->isolate(), "Http2Setting"));
setting->Inherit(AsyncWrap::GetConstructorTemplate(env));
Local<ObjectTemplate> settingt = setting->InstanceTemplate();
settingt->SetInternalFieldCount(1);
env->set_http2settings_constructor_template(settingt);
Local<FunctionTemplate> stream = FunctionTemplate::New(env->isolate());
stream->SetClassName(FIXED_ONE_BYTE_STRING(env->isolate(), "Http2Stream"));
env->SetProtoMethod(stream, "id", Http2Stream::GetID);
env->SetProtoMethod(stream, "destroy", Http2Stream::Destroy);
env->SetProtoMethod(stream, "priority", Http2Stream::Priority);
env->SetProtoMethod(stream, "pushPromise", Http2Stream::PushPromise);
env->SetProtoMethod(stream, "info", Http2Stream::Info);
env->SetProtoMethod(stream, "trailers", Http2Stream::Trailers);
env->SetProtoMethod(stream, "respond", Http2Stream::Respond);
env->SetProtoMethod(stream, "rstStream", Http2Stream::RstStream);
env->SetProtoMethod(stream, "refreshState", Http2Stream::RefreshState);
stream->Inherit(AsyncWrap::GetConstructorTemplate(env));
StreamBase::AddMethods(env, stream);
Local<ObjectTemplate> streamt = stream->InstanceTemplate();
streamt->SetInternalFieldCount(StreamBase::kStreamBaseFieldCount);
env->set_http2stream_constructor_template(streamt);
target->Set(context,
FIXED_ONE_BYTE_STRING(env->isolate(), "Http2Stream"),
stream->GetFunction(env->context()).ToLocalChecked()).Check();
Local<FunctionTemplate> session =
env->NewFunctionTemplate(Http2Session::New);
session->SetClassName(http2SessionClassName);
session->InstanceTemplate()->SetInternalFieldCount(1);
session->Inherit(AsyncWrap::GetConstructorTemplate(env));
env->SetProtoMethod(session, "origin", Http2Session::Origin);
env->SetProtoMethod(session, "altsvc", Http2Session::AltSvc);
env->SetProtoMethod(session, "ping", Http2Session::Ping);
env->SetProtoMethod(session, "consume", Http2Session::Consume);
env->SetProtoMethod(session, "destroy", Http2Session::Destroy);
env->SetProtoMethod(session, "goaway", Http2Session::Goaway);
env->SetProtoMethod(session, "settings", Http2Session::Settings);
env->SetProtoMethod(session, "request", Http2Session::Request);
env->SetProtoMethod(session, "setNextStreamID",
Http2Session::SetNextStreamID);
env->SetProtoMethod(session, "updateChunksSent",
Http2Session::UpdateChunksSent);
env->SetProtoMethod(session, "refreshState", Http2Session::RefreshState);
env->SetProtoMethod(
session, "localSettings",
Http2Session::RefreshSettings<nghttp2_session_get_local_settings>);
env->SetProtoMethod(
session, "remoteSettings",
Http2Session::RefreshSettings<nghttp2_session_get_remote_settings>);
target->Set(context,
http2SessionClassName,
session->GetFunction(env->context()).ToLocalChecked()).Check();
Local<Object> constants = Object::New(isolate);
Local<Array> name_for_error_code = Array::New(isolate);
#define NODE_NGHTTP2_ERROR_CODES(V) \
V(NGHTTP2_SESSION_SERVER); \
V(NGHTTP2_SESSION_CLIENT); \
V(NGHTTP2_STREAM_STATE_IDLE); \
V(NGHTTP2_STREAM_STATE_OPEN); \
V(NGHTTP2_STREAM_STATE_RESERVED_LOCAL); \
V(NGHTTP2_STREAM_STATE_RESERVED_REMOTE); \
V(NGHTTP2_STREAM_STATE_HALF_CLOSED_LOCAL); \
V(NGHTTP2_STREAM_STATE_HALF_CLOSED_REMOTE); \
V(NGHTTP2_STREAM_STATE_CLOSED); \
V(NGHTTP2_NO_ERROR); \
V(NGHTTP2_PROTOCOL_ERROR); \
V(NGHTTP2_INTERNAL_ERROR); \
V(NGHTTP2_FLOW_CONTROL_ERROR); \
V(NGHTTP2_SETTINGS_TIMEOUT); \
V(NGHTTP2_STREAM_CLOSED); \
V(NGHTTP2_FRAME_SIZE_ERROR); \
V(NGHTTP2_REFUSED_STREAM); \
V(NGHTTP2_CANCEL); \
V(NGHTTP2_COMPRESSION_ERROR); \
V(NGHTTP2_CONNECT_ERROR); \
V(NGHTTP2_ENHANCE_YOUR_CALM); \
V(NGHTTP2_INADEQUATE_SECURITY); \
V(NGHTTP2_HTTP_1_1_REQUIRED); \
#define V(name) \
NODE_DEFINE_CONSTANT(constants, name); \
name_for_error_code->Set(env->context(), \
static_cast<int>(name), \
FIXED_ONE_BYTE_STRING(isolate, \
#name)).Check();
NODE_NGHTTP2_ERROR_CODES(V)
#undef V
NODE_DEFINE_HIDDEN_CONSTANT(constants, NGHTTP2_HCAT_REQUEST);
NODE_DEFINE_HIDDEN_CONSTANT(constants, NGHTTP2_HCAT_RESPONSE);
NODE_DEFINE_HIDDEN_CONSTANT(constants, NGHTTP2_HCAT_PUSH_RESPONSE);
NODE_DEFINE_HIDDEN_CONSTANT(constants, NGHTTP2_HCAT_HEADERS);
NODE_DEFINE_HIDDEN_CONSTANT(constants, NGHTTP2_NV_FLAG_NONE);
NODE_DEFINE_HIDDEN_CONSTANT(constants, NGHTTP2_NV_FLAG_NO_INDEX);
NODE_DEFINE_HIDDEN_CONSTANT(constants, NGHTTP2_ERR_DEFERRED);
NODE_DEFINE_HIDDEN_CONSTANT(constants, NGHTTP2_ERR_STREAM_ID_NOT_AVAILABLE);
NODE_DEFINE_HIDDEN_CONSTANT(constants, NGHTTP2_ERR_INVALID_ARGUMENT);
NODE_DEFINE_HIDDEN_CONSTANT(constants, NGHTTP2_ERR_STREAM_CLOSED);
NODE_DEFINE_CONSTANT(constants, NGHTTP2_ERR_FRAME_SIZE_ERROR);
NODE_DEFINE_HIDDEN_CONSTANT(constants, STREAM_OPTION_EMPTY_PAYLOAD);
NODE_DEFINE_HIDDEN_CONSTANT(constants, STREAM_OPTION_GET_TRAILERS);
NODE_DEFINE_CONSTANT(constants, NGHTTP2_FLAG_NONE);
NODE_DEFINE_CONSTANT(constants, NGHTTP2_FLAG_END_STREAM);
NODE_DEFINE_CONSTANT(constants, NGHTTP2_FLAG_END_HEADERS);
NODE_DEFINE_CONSTANT(constants, NGHTTP2_FLAG_ACK);
NODE_DEFINE_CONSTANT(constants, NGHTTP2_FLAG_PADDED);
NODE_DEFINE_CONSTANT(constants, NGHTTP2_FLAG_PRIORITY);
NODE_DEFINE_CONSTANT(constants, DEFAULT_SETTINGS_HEADER_TABLE_SIZE);
NODE_DEFINE_CONSTANT(constants, DEFAULT_SETTINGS_ENABLE_PUSH);
NODE_DEFINE_CONSTANT(constants, DEFAULT_SETTINGS_MAX_CONCURRENT_STREAMS);
NODE_DEFINE_CONSTANT(constants, DEFAULT_SETTINGS_INITIAL_WINDOW_SIZE);
NODE_DEFINE_CONSTANT(constants, DEFAULT_SETTINGS_MAX_FRAME_SIZE);
NODE_DEFINE_CONSTANT(constants, DEFAULT_SETTINGS_MAX_HEADER_LIST_SIZE);
NODE_DEFINE_CONSTANT(constants, DEFAULT_SETTINGS_ENABLE_CONNECT_PROTOCOL);
NODE_DEFINE_CONSTANT(constants, MAX_MAX_FRAME_SIZE);
NODE_DEFINE_CONSTANT(constants, MIN_MAX_FRAME_SIZE);
NODE_DEFINE_CONSTANT(constants, MAX_INITIAL_WINDOW_SIZE);
NODE_DEFINE_CONSTANT(constants, NGHTTP2_DEFAULT_WEIGHT);
NODE_DEFINE_CONSTANT(constants, NGHTTP2_SETTINGS_HEADER_TABLE_SIZE);
NODE_DEFINE_CONSTANT(constants, NGHTTP2_SETTINGS_ENABLE_PUSH);
NODE_DEFINE_CONSTANT(constants, NGHTTP2_SETTINGS_MAX_CONCURRENT_STREAMS);
NODE_DEFINE_CONSTANT(constants, NGHTTP2_SETTINGS_INITIAL_WINDOW_SIZE);
NODE_DEFINE_CONSTANT(constants, NGHTTP2_SETTINGS_MAX_FRAME_SIZE);
NODE_DEFINE_CONSTANT(constants, NGHTTP2_SETTINGS_MAX_HEADER_LIST_SIZE);
NODE_DEFINE_CONSTANT(constants, NGHTTP2_SETTINGS_ENABLE_CONNECT_PROTOCOL);
NODE_DEFINE_CONSTANT(constants, PADDING_STRATEGY_NONE);
NODE_DEFINE_CONSTANT(constants, PADDING_STRATEGY_ALIGNED);
NODE_DEFINE_CONSTANT(constants, PADDING_STRATEGY_MAX);
NODE_DEFINE_CONSTANT(constants, PADDING_STRATEGY_CALLBACK);
#define STRING_CONSTANT(NAME, VALUE) \
NODE_DEFINE_STRING_CONSTANT(constants, "HTTP2_HEADER_" # NAME, VALUE);
HTTP_KNOWN_HEADERS(STRING_CONSTANT)
#undef STRING_CONSTANT
#define STRING_CONSTANT(NAME, VALUE) \
NODE_DEFINE_STRING_CONSTANT(constants, "HTTP2_METHOD_" # NAME, VALUE);
HTTP_KNOWN_METHODS(STRING_CONSTANT)
#undef STRING_CONSTANT
#define V(name, _) NODE_DEFINE_CONSTANT(constants, HTTP_STATUS_##name);
HTTP_STATUS_CODES(V)
#undef V
env->SetMethod(target, "refreshDefaultSettings", RefreshDefaultSettings);
env->SetMethod(target, "packSettings", PackSettings);
env->SetMethod(target, "setCallbackFunctions", SetCallbackFunctions);
target->Set(context,
env->constants_string(),
constants).Check();
target->Set(context,
FIXED_ONE_BYTE_STRING(isolate, "nameForErrorCode"),
name_for_error_code).Check();
}
} // namespace http2
} // namespace node
NODE_MODULE_CONTEXT_AWARE_INTERNAL(http2, node::http2::Initialize)