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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "net/third_party/quic/tools/quic_simple_server_stream.h"
#include <list>
#include <utility>
#include "net/third_party/quic/core/http/quic_spdy_stream.h"
#include "net/third_party/quic/core/http/spdy_utils.h"
#include "net/third_party/quic/core/quic_utils.h"
#include "net/third_party/quic/platform/api/quic_bug_tracker.h"
#include "net/third_party/quic/platform/api/quic_flags.h"
#include "net/third_party/quic/platform/api/quic_logging.h"
#include "net/third_party/quic/platform/api/quic_map_util.h"
#include "net/third_party/quic/platform/api/quic_text_utils.h"
#include "net/third_party/quic/tools/quic_simple_server_session.h"
#include "net/third_party/quiche/src/spdy/core/spdy_protocol.h"
using spdy::SpdyHeaderBlock;
namespace quic {
QuicSimpleServerStream::QuicSimpleServerStream(
QuicStreamId id,
QuicSpdySession* session,
StreamType type,
QuicSimpleServerBackend* quic_simple_server_backend)
: QuicSpdyServerStreamBase(id, session, type),
content_length_(-1),
quic_simple_server_backend_(quic_simple_server_backend) {}
QuicSimpleServerStream::QuicSimpleServerStream(
PendingStream pending,
QuicSpdySession* session,
StreamType type,
QuicSimpleServerBackend* quic_simple_server_backend)
: QuicSpdyServerStreamBase(std::move(pending), session, type),
content_length_(-1),
quic_simple_server_backend_(quic_simple_server_backend) {}
QuicSimpleServerStream::~QuicSimpleServerStream() {
quic_simple_server_backend_->CloseBackendResponseStream(this);
}
void QuicSimpleServerStream::OnInitialHeadersComplete(
bool fin,
size_t frame_len,
const QuicHeaderList& header_list) {
QuicSpdyStream::OnInitialHeadersComplete(fin, frame_len, header_list);
if (!SpdyUtils::CopyAndValidateHeaders(header_list, &content_length_,
&request_headers_)) {
QUIC_DVLOG(1) << "Invalid headers";
SendErrorResponse();
}
ConsumeHeaderList();
}
void QuicSimpleServerStream::OnTrailingHeadersComplete(
bool fin,
size_t frame_len,
const QuicHeaderList& header_list) {
QUIC_BUG << "Server does not support receiving Trailers.";
SendErrorResponse();
}
void QuicSimpleServerStream::OnBodyAvailable() {
while (HasBytesToRead()) {
struct iovec iov;
if (GetReadableRegions(&iov, 1) == 0) {
// No more data to read.
break;
}
QUIC_DVLOG(1) << "Stream " << id() << " processed " << iov.iov_len
<< " bytes.";
body_.append(static_cast<char*>(iov.iov_base), iov.iov_len);
if (content_length_ >= 0 &&
body_.size() > static_cast<uint64_t>(content_length_)) {
QUIC_DVLOG(1) << "Body size (" << body_.size() << ") > content length ("
<< content_length_ << ").";
SendErrorResponse();
return;
}
MarkConsumed(iov.iov_len);
}
if (!sequencer()->IsClosed()) {
sequencer()->SetUnblocked();
return;
}
// If the sequencer is closed, then all the body, including the fin, has been
// consumed.
OnFinRead();
if (write_side_closed() || fin_buffered()) {
return;
}
SendResponse();
}
void QuicSimpleServerStream::PushResponse(
SpdyHeaderBlock push_request_headers) {
if (QuicUtils::IsClientInitiatedStreamId(
session()->connection()->transport_version(), id())) {
QUIC_BUG << "Client initiated stream shouldn't be used as promised stream.";
return;
}
// Change the stream state to emulate a client request.
request_headers_ = std::move(push_request_headers);
content_length_ = 0;
QUIC_DVLOG(1) << "Stream " << id()
<< " ready to receive server push response.";
DCHECK(reading_stopped());
// Directly send response based on the emulated request_headers_.
SendResponse();
}
void QuicSimpleServerStream::SendResponse() {
if (request_headers_.empty()) {
QUIC_DVLOG(1) << "Request headers empty.";
SendErrorResponse();
return;
}
if (content_length_ > 0 &&
static_cast<uint64_t>(content_length_) != body_.size()) {
QUIC_DVLOG(1) << "Content length (" << content_length_ << ") != body size ("
<< body_.size() << ").";
SendErrorResponse();
return;
}
if (!QuicContainsKey(request_headers_, ":authority") ||
!QuicContainsKey(request_headers_, ":path")) {
QUIC_DVLOG(1) << "Request headers do not contain :authority or :path.";
SendErrorResponse();
return;
}
// Fetch the response from the backend interface and wait for callback once
// response is ready
quic_simple_server_backend_->FetchResponseFromBackend(request_headers_, body_,
this);
}
QuicConnectionId QuicSimpleServerStream::connection_id() const {
return spdy_session()->connection_id();
}
QuicStreamId QuicSimpleServerStream::stream_id() const {
return id();
}
QuicString QuicSimpleServerStream::peer_host() const {
return spdy_session()->peer_address().host().ToString();
}
void QuicSimpleServerStream::OnResponseBackendComplete(
const QuicBackendResponse* response,
std::list<QuicBackendResponse::ServerPushInfo> resources) {
if (response == nullptr) {
QUIC_DVLOG(1) << "Response not found in cache.";
SendNotFoundResponse();
return;
}
if (response->response_type() == QuicBackendResponse::CLOSE_CONNECTION) {
QUIC_DVLOG(1) << "Special response: closing connection.";
CloseConnectionWithDetails(QUIC_NO_ERROR, "Toy server forcing close");
return;
}
if (response->response_type() == QuicBackendResponse::IGNORE_REQUEST) {
QUIC_DVLOG(1) << "Special response: ignoring request.";
return;
}
if (response->response_type() == QuicBackendResponse::BACKEND_ERR_RESPONSE) {
QUIC_DVLOG(1) << "Quic Proxy: Backend connection error.";
/*502 Bad Gateway
The server was acting as a gateway or proxy and received an
invalid response from the upstream server.*/
SendErrorResponse(502);
return;
}
// Examing response status, if it was not pure integer as typical h2
// response status, send error response. Notice that
// QuicHttpResponseCache push urls are strictly authority + path only,
// scheme is not included (see |QuicHttpResponseCache::GetKey()|).
QuicString request_url = request_headers_[":authority"].as_string() +
request_headers_[":path"].as_string();
int response_code;
const SpdyHeaderBlock& response_headers = response->headers();
if (!ParseHeaderStatusCode(response_headers, &response_code)) {
auto status = response_headers.find(":status");
if (status == response_headers.end()) {
QUIC_LOG(WARNING)
<< ":status not present in response from cache for request "
<< request_url;
} else {
QUIC_LOG(WARNING) << "Illegal (non-integer) response :status from cache: "
<< status->second << " for request " << request_url;
}
SendErrorResponse();
return;
}
if (QuicUtils::IsServerInitiatedStreamId(
session()->connection()->transport_version(), id())) {
// A server initiated stream is only used for a server push response,
// and only 200 and 30X response codes are supported for server push.
// This behavior mirrors the HTTP/2 implementation.
bool is_redirection = response_code / 100 == 3;
if (response_code != 200 && !is_redirection) {
QUIC_LOG(WARNING) << "Response to server push request " << request_url
<< " result in response code " << response_code;
Reset(QUIC_STREAM_CANCELLED);
return;
}
}
if (!resources.empty()) {
QUIC_DVLOG(1) << "Stream " << id() << " found " << resources.size()
<< " push resources.";
QuicSimpleServerSession* session =
static_cast<QuicSimpleServerSession*>(spdy_session());
session->PromisePushResources(request_url, resources, id(),
request_headers_);
}
if (response->response_type() == QuicBackendResponse::INCOMPLETE_RESPONSE) {
QUIC_DVLOG(1)
<< "Stream " << id()
<< " sending an incomplete response, i.e. no trailer, no fin.";
SendIncompleteResponse(response->headers().Clone(), response->body());
return;
}
if (response->response_type() == QuicBackendResponse::STOP_SENDING) {
QUIC_DVLOG(1)
<< "Stream " << id()
<< " sending an incomplete response, i.e. no trailer, no fin.";
SendIncompleteResponse(response->headers().Clone(), response->body());
SendStopSending(response->stop_sending_code());
return;
}
QUIC_DVLOG(1) << "Stream " << id() << " sending response.";
SendHeadersAndBodyAndTrailers(response->headers().Clone(), response->body(),
response->trailers().Clone());
}
void QuicSimpleServerStream::SendNotFoundResponse() {
QUIC_DVLOG(1) << "Stream " << id() << " sending not found response.";
SpdyHeaderBlock headers;
headers[":status"] = "404";
headers["content-length"] =
QuicTextUtils::Uint64ToString(strlen(kNotFoundResponseBody));
SendHeadersAndBody(std::move(headers), kNotFoundResponseBody);
}
void QuicSimpleServerStream::SendErrorResponse() {
SendErrorResponse(0);
}
void QuicSimpleServerStream::SendErrorResponse(int resp_code) {
QUIC_DVLOG(1) << "Stream " << id() << " sending error response.";
SpdyHeaderBlock headers;
if (resp_code <= 0) {
headers[":status"] = "500";
} else {
headers[":status"] = QuicTextUtils::Uint64ToString(resp_code);
}
headers["content-length"] =
QuicTextUtils::Uint64ToString(strlen(kErrorResponseBody));
SendHeadersAndBody(std::move(headers), kErrorResponseBody);
}
void QuicSimpleServerStream::SendIncompleteResponse(
SpdyHeaderBlock response_headers,
QuicStringPiece body) {
QUIC_DLOG(INFO) << "Stream " << id() << " writing headers (fin = false) : "
<< response_headers.DebugString();
WriteHeaders(std::move(response_headers), /*fin=*/false, nullptr);
QUIC_DLOG(INFO) << "Stream " << id()
<< " writing body (fin = false) with size: " << body.size();
if (!body.empty()) {
WriteOrBufferBody(body, /*fin=*/false, nullptr);
}
}
void QuicSimpleServerStream::SendHeadersAndBody(
SpdyHeaderBlock response_headers,
QuicStringPiece body) {
SendHeadersAndBodyAndTrailers(std::move(response_headers), body,
SpdyHeaderBlock());
}
void QuicSimpleServerStream::SendHeadersAndBodyAndTrailers(
SpdyHeaderBlock response_headers,
QuicStringPiece body,
SpdyHeaderBlock response_trailers) {
// Send the headers, with a FIN if there's nothing else to send.
bool send_fin = (body.empty() && response_trailers.empty());
QUIC_DLOG(INFO) << "Stream " << id() << " writing headers (fin = " << send_fin
<< ") : " << response_headers.DebugString();
WriteHeaders(std::move(response_headers), send_fin, nullptr);
if (send_fin) {
// Nothing else to send.
return;
}
// Send the body, with a FIN if there's no trailers to send.
send_fin = response_trailers.empty();
QUIC_DLOG(INFO) << "Stream " << id() << " writing body (fin = " << send_fin
<< ") with size: " << body.size();
if (!body.empty() || send_fin) {
WriteOrBufferBody(body, send_fin, nullptr);
}
if (send_fin) {
// Nothing else to send.
return;
}
// Send the trailers. A FIN is always sent with trailers.
QUIC_DLOG(INFO) << "Stream " << id() << " writing trailers (fin = true): "
<< response_trailers.DebugString();
WriteTrailers(std::move(response_trailers), nullptr);
}
const char* const QuicSimpleServerStream::kErrorResponseBody = "bad";
const char* const QuicSimpleServerStream::kNotFoundResponseBody =
"file not found";
} // namespace quic