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chromium / chromium / src / 5.0.375.55 / . / net / http / http_network_transaction.cc
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// Copyright (c) 2010 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/http/http_network_transaction.h"
#include "base/compiler_specific.h"
#include "base/field_trial.h"
#include "base/format_macros.h"
#include "base/histogram.h"
#include "base/scoped_ptr.h"
#include "base/stats_counters.h"
#include "base/string_util.h"
#include "base/trace_event.h"
#include "build/build_config.h"
#include "net/base/connection_type_histograms.h"
#include "net/base/io_buffer.h"
#include "net/base/load_flags.h"
#include "net/base/net_errors.h"
#include "net/base/net_util.h"
#include "net/base/ssl_cert_request_info.h"
#include "net/base/upload_data_stream.h"
#include "net/http/http_auth.h"
#include "net/http/http_auth_handler.h"
#include "net/http/http_basic_stream.h"
#include "net/http/http_chunked_decoder.h"
#include "net/http/http_network_session.h"
#include "net/http/http_request_headers.h"
#include "net/http/http_request_info.h"
#include "net/http/http_response_headers.h"
#include "net/http/http_response_info.h"
#include "net/http/http_util.h"
#include "net/http/url_security_manager.h"
#include "net/socket/client_socket_factory.h"
#include "net/socket/socks_client_socket_pool.h"
#include "net/socket/ssl_client_socket.h"
#include "net/socket/tcp_client_socket_pool.h"
#include "net/spdy/spdy_session.h"
#include "net/spdy/spdy_session_pool.h"
#include "net/spdy/spdy_stream.h"
using base::Time;
namespace net {
namespace {
const std::string* g_next_protos = NULL;
void BuildRequestHeaders(const HttpRequestInfo* request_info,
const HttpRequestHeaders& authorization_headers,
const UploadDataStream* upload_data_stream,
bool using_proxy,
HttpRequestHeaders* request_headers) {
const std::string path = using_proxy ?
HttpUtil::SpecForRequest(request_info->url) :
HttpUtil::PathForRequest(request_info->url);
request_headers->SetRequestLine(
request_info->method, path, "1.1");
request_headers->SetHeader(HttpRequestHeaders::kHost,
GetHostAndOptionalPort(request_info->url));
// For compat with HTTP/1.0 servers and proxies:
if (using_proxy) {
request_headers->SetHeader(HttpRequestHeaders::kProxyConnection,
"keep-alive");
} else {
request_headers->SetHeader(HttpRequestHeaders::kConnection, "keep-alive");
}
if (!request_info->user_agent.empty()) {
request_headers->SetHeader(HttpRequestHeaders::kUserAgent,
request_info->user_agent);
}
// Our consumer should have made sure that this is a safe referrer. See for
// instance WebCore::FrameLoader::HideReferrer.
if (request_info->referrer.is_valid()) {
request_headers->SetHeader(HttpRequestHeaders::kReferer,
request_info->referrer.spec());
}
// Add a content length header?
if (upload_data_stream) {
request_headers->SetHeader(
HttpRequestHeaders::kContentLength,
Uint64ToString(upload_data_stream->size()));
} else if (request_info->method == "POST" || request_info->method == "PUT" ||
request_info->method == "HEAD") {
// An empty POST/PUT request still needs a content length. As for HEAD,
// IE and Safari also add a content length header. Presumably it is to
// support sending a HEAD request to an URL that only expects to be sent a
// POST or some other method that normally would have a message body.
request_headers->SetHeader(HttpRequestHeaders::kContentLength, "0");
}
// Honor load flags that impact proxy caches.
if (request_info->load_flags & LOAD_BYPASS_CACHE) {
request_headers->SetHeader(HttpRequestHeaders::kPragma, "no-cache");
request_headers->SetHeader(HttpRequestHeaders::kCacheControl, "no-cache");
} else if (request_info->load_flags & LOAD_VALIDATE_CACHE) {
request_headers->SetHeader(HttpRequestHeaders::kCacheControl, "max-age=0");
}
request_headers->MergeFrom(authorization_headers);
// Headers that will be stripped from request_info->extra_headers to prevent,
// e.g., plugins from overriding headers that are controlled using other
// means. Otherwise a plugin could set a referrer although sending the
// referrer is inhibited.
// TODO(jochen): check whether also other headers should be stripped.
static const char* const kExtraHeadersToBeStripped[] = {
"Referer"
};
// TODO(willchan): Change HttpRequestInfo::extra_headers to be a
// HttpRequestHeaders.
std::vector<std::string> extra_headers_vector;
Tokenize(request_info->extra_headers, "\r\n", &extra_headers_vector);
HttpRequestHeaders extra_headers;
if (!extra_headers_vector.empty()) {
for (std::vector<std::string>::const_iterator it =
extra_headers_vector.begin(); it != extra_headers_vector.end(); ++it)
extra_headers.AddHeaderFromString(*it);
for (size_t i = 0; i < arraysize(kExtraHeadersToBeStripped); ++i)
extra_headers.RemoveHeader(kExtraHeadersToBeStripped[i]);
request_headers->MergeFrom(extra_headers);
}
}
// The HTTP CONNECT method for establishing a tunnel connection is documented
// in draft-luotonen-web-proxy-tunneling-01.txt and RFC 2817, Sections 5.2 and
// 5.3.
void BuildTunnelRequest(const HttpRequestInfo* request_info,
const HttpRequestHeaders& authorization_headers,
HttpRequestHeaders* request_headers) {
// RFC 2616 Section 9 says the Host request-header field MUST accompany all
// HTTP/1.1 requests. Add "Proxy-Connection: keep-alive" for compat with
// HTTP/1.0 proxies such as Squid (required for NTLM authentication).
request_headers->SetRequestLine(
"CONNECT", GetHostAndPort(request_info->url), "1.1");
request_headers->SetHeader(HttpRequestHeaders::kHost,
GetHostAndOptionalPort(request_info->url));
request_headers->SetHeader(HttpRequestHeaders::kProxyConnection,
"keep-alive");
if (!request_info->user_agent.empty()) {
request_headers->SetHeader(HttpRequestHeaders::kUserAgent,
request_info->user_agent);
}
request_headers->MergeFrom(authorization_headers);
}
void ProcessAlternateProtocol(const HttpResponseHeaders& headers,
const HostPortPair& http_host_port_pair,
HttpAlternateProtocols* alternate_protocols) {
if (!g_next_protos || g_next_protos->empty()) {
// This implies that NPN is not suppoted. We don't currently support any
// alternate protocols that don't use NPN.
return;
}
std::string alternate_protocol_str;
if (!headers.EnumerateHeader(NULL, HttpAlternateProtocols::kHeader,
&alternate_protocol_str)) {
// Header is not present.
return;
}
std::vector<std::string> port_protocol_vector;
SplitString(alternate_protocol_str, ':', &port_protocol_vector);
if (port_protocol_vector.size() != 2) {
DLOG(WARNING) << HttpAlternateProtocols::kHeader
<< " header has too many tokens: "
<< alternate_protocol_str;
return;
}
int port;
if (!StringToInt(port_protocol_vector[0], &port) ||
port <= 0 || port >= 1 << 16) {
DLOG(WARNING) << HttpAlternateProtocols::kHeader
<< " header has unrecognizable port: "
<< port_protocol_vector[0];
return;
}
if (port_protocol_vector[1] !=
HttpAlternateProtocols::kProtocolStrings[
HttpAlternateProtocols::NPN_SPDY]) {
// Currently, we only recognize the npn-spdy protocol.
DLOG(WARNING) << HttpAlternateProtocols::kHeader
<< " header has unrecognized protocol: "
<< port_protocol_vector[1];
return;
}
if (alternate_protocols->HasAlternateProtocolFor(http_host_port_pair)) {
const HttpAlternateProtocols::PortProtocolPair existing_alternate =
alternate_protocols->GetAlternateProtocolFor(http_host_port_pair);
// If we think the alternate protocol is broken, don't change it.
if (existing_alternate.protocol == HttpAlternateProtocols::BROKEN)
return;
}
alternate_protocols->SetAlternateProtocolFor(
http_host_port_pair, port, HttpAlternateProtocols::NPN_SPDY);
}
} // namespace
//-----------------------------------------------------------------------------
bool HttpNetworkTransaction::g_ignore_certificate_errors = false;
HttpNetworkTransaction::HttpNetworkTransaction(HttpNetworkSession* session)
: pending_auth_target_(HttpAuth::AUTH_NONE),
ALLOW_THIS_IN_INITIALIZER_LIST(
io_callback_(this, &HttpNetworkTransaction::OnIOComplete)),
user_callback_(NULL),
session_(session),
request_(NULL),
pac_request_(NULL),
connection_(new ClientSocketHandle),
reused_socket_(false),
headers_valid_(false),
logged_response_time(false),
using_ssl_(false),
proxy_mode_(kDirectConnection),
establishing_tunnel_(false),
using_spdy_(false),
alternate_protocol_mode_(kUnspecified),
embedded_identity_used_(false),
default_credentials_used_(false),
read_buf_len_(0),
next_state_(STATE_NONE) {
session->ssl_config_service()->GetSSLConfig(&ssl_config_);
if (g_next_protos)
ssl_config_.next_protos = *g_next_protos;
}
// static
void HttpNetworkTransaction::SetNextProtos(const std::string& next_protos) {
delete g_next_protos;
g_next_protos = new std::string(next_protos);
}
// static
void HttpNetworkTransaction::IgnoreCertificateErrors(bool enabled) {
g_ignore_certificate_errors = enabled;
}
int HttpNetworkTransaction::Start(const HttpRequestInfo* request_info,
CompletionCallback* callback,
const BoundNetLog& net_log) {
SIMPLE_STATS_COUNTER("HttpNetworkTransaction.Count");
net_log_ = net_log;
request_ = request_info;
start_time_ = base::Time::Now();
next_state_ = STATE_RESOLVE_PROXY;
int rv = DoLoop(OK);
if (rv == ERR_IO_PENDING)
user_callback_ = callback;
return rv;
}
int HttpNetworkTransaction::RestartIgnoringLastError(
CompletionCallback* callback) {
if (connection_->socket()->IsConnectedAndIdle()) {
// TODO(wtc): Should we update any of the connection histograms that we
// update in DoSSLConnectComplete if |result| is OK?
if (using_spdy_) {
next_state_ = STATE_SPDY_SEND_REQUEST;
} else {
next_state_ = STATE_SEND_REQUEST;
}
} else {
connection_->socket()->Disconnect();
connection_->Reset();
next_state_ = STATE_INIT_CONNECTION;
}
int rv = DoLoop(OK);
if (rv == ERR_IO_PENDING)
user_callback_ = callback;
return rv;
}
int HttpNetworkTransaction::RestartWithCertificate(
X509Certificate* client_cert,
CompletionCallback* callback) {
ssl_config_.client_cert = client_cert;
if (client_cert) {
session_->ssl_client_auth_cache()->Add(GetHostAndPort(request_->url),
client_cert);
}
ssl_config_.send_client_cert = true;
next_state_ = STATE_INIT_CONNECTION;
// Reset the other member variables.
// Note: this is necessary only with SSL renegotiation.
ResetStateForRestart();
int rv = DoLoop(OK);
if (rv == ERR_IO_PENDING)
user_callback_ = callback;
return rv;
}
int HttpNetworkTransaction::RestartWithAuth(
const std::wstring& username,
const std::wstring& password,
CompletionCallback* callback) {
HttpAuth::Target target = pending_auth_target_;
if (target == HttpAuth::AUTH_NONE) {
NOTREACHED();
return ERR_UNEXPECTED;
}
pending_auth_target_ = HttpAuth::AUTH_NONE;
DCHECK(auth_identity_[target].invalid ||
(username.empty() && password.empty()));
if (auth_identity_[target].invalid) {
// Update the username/password.
auth_identity_[target].source = HttpAuth::IDENT_SRC_EXTERNAL;
auth_identity_[target].invalid = false;
auth_identity_[target].username = username;
auth_identity_[target].password = password;
}
PrepareForAuthRestart(target);
DCHECK(user_callback_ == NULL);
int rv = DoLoop(OK);
if (rv == ERR_IO_PENDING)
user_callback_ = callback;
return rv;
}
void HttpNetworkTransaction::PrepareForAuthRestart(HttpAuth::Target target) {
DCHECK(HaveAuth(target));
DCHECK(auth_identity_[target].source != HttpAuth::IDENT_SRC_PATH_LOOKUP);
// Add the auth entry to the cache before restarting. We don't know whether
// the identity is valid yet, but if it is valid we want other transactions
// to know about it. If an entry for (origin, handler->realm()) already
// exists, we update it.
//
// If auth_identity_[target].source is HttpAuth::IDENT_SRC_NONE or
// HttpAuth::IDENT_SRC_DEFAULT_CREDENTIALS, auth_identity_[target] contains
// no identity because identity is not required yet or we're using default
// credentials.
//
// TODO(wtc): For NTLM_SSPI, we add the same auth entry to the cache in
// round 1 and round 2, which is redundant but correct. It would be nice
// to add an auth entry to the cache only once, preferrably in round 1.
// See http://crbug.com/21015.
switch (auth_identity_[target].source) {
case HttpAuth::IDENT_SRC_NONE:
case HttpAuth::IDENT_SRC_DEFAULT_CREDENTIALS:
break;
default:
session_->auth_cache()->Add(
AuthOrigin(target), auth_handler_[target],
auth_identity_[target].username, auth_identity_[target].password,
AuthPath(target));
break;
}
bool keep_alive = false;
// Even if the server says the connection is keep-alive, we have to be
// able to find the end of each response in order to reuse the connection.
if (GetResponseHeaders()->IsKeepAlive() &&
http_stream_->CanFindEndOfResponse()) {
// If the response body hasn't been completely read, we need to drain
// it first.
if (!http_stream_->IsResponseBodyComplete()) {
next_state_ = STATE_DRAIN_BODY_FOR_AUTH_RESTART;
read_buf_ = new IOBuffer(kDrainBodyBufferSize); // A bit bucket.
read_buf_len_ = kDrainBodyBufferSize;
return;
}
keep_alive = true;
}
// We don't need to drain the response body, so we act as if we had drained
// the response body.
DidDrainBodyForAuthRestart(keep_alive);
}
void HttpNetworkTransaction::DidDrainBodyForAuthRestart(bool keep_alive) {
if (keep_alive && connection_->socket()->IsConnectedAndIdle()) {
// We should call connection_->set_idle_time(), but this doesn't occur
// often enough to be worth the trouble.
next_state_ = STATE_SEND_REQUEST;
connection_->set_is_reused(true);
reused_socket_ = true;
} else {
next_state_ = STATE_INIT_CONNECTION;
connection_->socket()->Disconnect();
connection_->Reset();
}
// Reset the other member variables.
ResetStateForRestart();
}
int HttpNetworkTransaction::Read(IOBuffer* buf, int buf_len,
CompletionCallback* callback) {
DCHECK(buf);
DCHECK_LT(0, buf_len);
State next_state = STATE_NONE;
// Are we using SPDY or HTTP?
if (using_spdy_) {
DCHECK(!http_stream_.get());
DCHECK(spdy_stream_->GetResponseInfo()->headers);
next_state = STATE_SPDY_READ_BODY;
} else {
DCHECK(!spdy_stream_.get());
scoped_refptr<HttpResponseHeaders> headers = GetResponseHeaders();
DCHECK(headers.get());
next_state = STATE_READ_BODY;
if (!connection_->is_initialized())
return 0; // connection_->has been reset. Treat like EOF.
if (establishing_tunnel_) {
// We're trying to read the body of the response but we're still trying
// to establish an SSL tunnel through the proxy. We can't read these
// bytes when establishing a tunnel because they might be controlled by
// an active network attacker. We don't worry about this for HTTP
// because an active network attacker can already control HTTP sessions.
// We reach this case when the user cancels a 407 proxy auth prompt.
// See http://crbug.com/8473.
DCHECK_EQ(407, headers->response_code());
LogBlockedTunnelResponse(headers->response_code());
return ERR_TUNNEL_CONNECTION_FAILED;
}
}
read_buf_ = buf;
read_buf_len_ = buf_len;
next_state_ = next_state;
int rv = DoLoop(OK);
if (rv == ERR_IO_PENDING)
user_callback_ = callback;
return rv;
}
const HttpResponseInfo* HttpNetworkTransaction::GetResponseInfo() const {
return ((headers_valid_ && response_.headers) || response_.ssl_info.cert ||
response_.cert_request_info) ? &response_ : NULL;
}
LoadState HttpNetworkTransaction::GetLoadState() const {
// TODO(wtc): Define a new LoadState value for the
// STATE_INIT_CONNECTION_COMPLETE state, which delays the HTTP request.
switch (next_state_) {
case STATE_RESOLVE_PROXY_COMPLETE:
return LOAD_STATE_RESOLVING_PROXY_FOR_URL;
case STATE_INIT_CONNECTION_COMPLETE:
return connection_->GetLoadState();
case STATE_SEND_REQUEST_COMPLETE:
return LOAD_STATE_SENDING_REQUEST;
case STATE_READ_HEADERS_COMPLETE:
return LOAD_STATE_WAITING_FOR_RESPONSE;
case STATE_READ_BODY_COMPLETE:
return LOAD_STATE_READING_RESPONSE;
default:
return LOAD_STATE_IDLE;
}
}
uint64 HttpNetworkTransaction::GetUploadProgress() const {
if (!http_stream_.get())
return 0;
return http_stream_->GetUploadProgress();
}
HttpNetworkTransaction::~HttpNetworkTransaction() {
// If we still have an open socket, then make sure to disconnect it so it
// won't call us back and we don't try to reuse it later on.
if (connection_.get() && connection_->is_initialized())
connection_->socket()->Disconnect();
if (pac_request_)
session_->proxy_service()->CancelPacRequest(pac_request_);
if (spdy_stream_.get())
spdy_stream_->Cancel();
}
void HttpNetworkTransaction::DoCallback(int rv) {
DCHECK(rv != ERR_IO_PENDING);
DCHECK(user_callback_);
// Since Run may result in Read being called, clear user_callback_ up front.
CompletionCallback* c = user_callback_;
user_callback_ = NULL;
c->Run(rv);
}
void HttpNetworkTransaction::OnIOComplete(int result) {
int rv = DoLoop(result);
if (rv != ERR_IO_PENDING)
DoCallback(rv);
}
int HttpNetworkTransaction::DoLoop(int result) {
DCHECK(next_state_ != STATE_NONE);
int rv = result;
do {
State state = next_state_;
next_state_ = STATE_NONE;
switch (state) {
case STATE_RESOLVE_PROXY:
DCHECK_EQ(OK, rv);
TRACE_EVENT_BEGIN("http.resolve_proxy", request_, request_->url.spec());
rv = DoResolveProxy();
break;
case STATE_RESOLVE_PROXY_COMPLETE:
rv = DoResolveProxyComplete(rv);
TRACE_EVENT_END("http.resolve_proxy", request_, request_->url.spec());
break;
case STATE_INIT_CONNECTION:
DCHECK_EQ(OK, rv);
TRACE_EVENT_BEGIN("http.init_conn", request_, request_->url.spec());
rv = DoInitConnection();
break;
case STATE_INIT_CONNECTION_COMPLETE:
rv = DoInitConnectionComplete(rv);
TRACE_EVENT_END("http.init_conn", request_, request_->url.spec());
break;
case STATE_SSL_CONNECT:
DCHECK_EQ(OK, rv);
TRACE_EVENT_BEGIN("http.ssl_connect", request_, request_->url.spec());
rv = DoSSLConnect();
break;
case STATE_SSL_CONNECT_COMPLETE:
rv = DoSSLConnectComplete(rv);
TRACE_EVENT_END("http.ssl_connect", request_, request_->url.spec());
break;
case STATE_SEND_REQUEST:
DCHECK_EQ(OK, rv);
TRACE_EVENT_BEGIN("http.send_request", request_, request_->url.spec());
net_log_.BeginEvent(NetLog::TYPE_HTTP_TRANSACTION_SEND_REQUEST);
rv = DoSendRequest();
break;
case STATE_SEND_REQUEST_COMPLETE:
rv = DoSendRequestComplete(rv);
TRACE_EVENT_END("http.send_request", request_, request_->url.spec());
net_log_.EndEvent(NetLog::TYPE_HTTP_TRANSACTION_SEND_REQUEST);
break;
case STATE_READ_HEADERS:
DCHECK_EQ(OK, rv);
TRACE_EVENT_BEGIN("http.read_headers", request_, request_->url.spec());
net_log_.BeginEvent(NetLog::TYPE_HTTP_TRANSACTION_READ_HEADERS);
rv = DoReadHeaders();
break;
case STATE_READ_HEADERS_COMPLETE:
rv = DoReadHeadersComplete(rv);
TRACE_EVENT_END("http.read_headers", request_, request_->url.spec());
net_log_.EndEvent(NetLog::TYPE_HTTP_TRANSACTION_READ_HEADERS);
break;
case STATE_RESOLVE_CANONICAL_NAME:
rv = DoResolveCanonicalName();
break;
case STATE_RESOLVE_CANONICAL_NAME_COMPLETE:
rv = DoResolveCanonicalNameComplete(rv);
break;
case STATE_READ_BODY:
DCHECK_EQ(OK, rv);
TRACE_EVENT_BEGIN("http.read_body", request_, request_->url.spec());
net_log_.BeginEvent(NetLog::TYPE_HTTP_TRANSACTION_READ_BODY);
rv = DoReadBody();
break;
case STATE_READ_BODY_COMPLETE:
rv = DoReadBodyComplete(rv);
TRACE_EVENT_END("http.read_body", request_, request_->url.spec());
net_log_.EndEvent(NetLog::TYPE_HTTP_TRANSACTION_READ_BODY);
break;
case STATE_DRAIN_BODY_FOR_AUTH_RESTART:
DCHECK_EQ(OK, rv);
TRACE_EVENT_BEGIN("http.drain_body_for_auth_restart",
request_, request_->url.spec());
net_log_.BeginEvent(
NetLog::TYPE_HTTP_TRANSACTION_DRAIN_BODY_FOR_AUTH_RESTART);
rv = DoDrainBodyForAuthRestart();
break;
case STATE_DRAIN_BODY_FOR_AUTH_RESTART_COMPLETE:
rv = DoDrainBodyForAuthRestartComplete(rv);
TRACE_EVENT_END("http.drain_body_for_auth_restart",
request_, request_->url.spec());
net_log_.EndEvent(
NetLog::TYPE_HTTP_TRANSACTION_DRAIN_BODY_FOR_AUTH_RESTART);
break;
case STATE_SPDY_SEND_REQUEST:
DCHECK_EQ(OK, rv);
TRACE_EVENT_BEGIN("http.send_request", request_, request_->url.spec());
net_log_.BeginEvent(NetLog::TYPE_SPDY_TRANSACTION_SEND_REQUEST);
rv = DoSpdySendRequest();
break;
case STATE_SPDY_SEND_REQUEST_COMPLETE:
rv = DoSpdySendRequestComplete(rv);
TRACE_EVENT_END("http.send_request", request_, request_->url.spec());
net_log_.EndEvent(NetLog::TYPE_SPDY_TRANSACTION_SEND_REQUEST);
break;
case STATE_SPDY_READ_HEADERS:
DCHECK_EQ(OK, rv);
TRACE_EVENT_BEGIN("http.read_headers", request_, request_->url.spec());
net_log_.BeginEvent(NetLog::TYPE_SPDY_TRANSACTION_READ_HEADERS);
rv = DoSpdyReadHeaders();
break;
case STATE_SPDY_READ_HEADERS_COMPLETE:
rv = DoSpdyReadHeadersComplete(rv);
TRACE_EVENT_END("http.read_headers", request_, request_->url.spec());
net_log_.EndEvent(NetLog::TYPE_SPDY_TRANSACTION_READ_HEADERS);
break;
case STATE_SPDY_READ_BODY:
DCHECK_EQ(OK, rv);
TRACE_EVENT_BEGIN("http.read_body", request_, request_->url.spec());
net_log_.BeginEvent(NetLog::TYPE_SPDY_TRANSACTION_READ_BODY);
rv = DoSpdyReadBody();
break;
case STATE_SPDY_READ_BODY_COMPLETE:
rv = DoSpdyReadBodyComplete(rv);
TRACE_EVENT_END("http.read_body", request_, request_->url.spec());
net_log_.EndEvent(NetLog::TYPE_SPDY_TRANSACTION_READ_BODY);
break;
default:
NOTREACHED() << "bad state";
rv = ERR_FAILED;
break;
}
} while (rv != ERR_IO_PENDING && next_state_ != STATE_NONE);
return rv;
}
int HttpNetworkTransaction::DoResolveProxy() {
DCHECK(!pac_request_);
next_state_ = STATE_RESOLVE_PROXY_COMPLETE;
if (request_->load_flags & LOAD_BYPASS_PROXY) {
proxy_info_.UseDirect();
return OK;
}
return session_->proxy_service()->ResolveProxy(
request_->url, &proxy_info_, &io_callback_, &pac_request_, net_log_);
}
int HttpNetworkTransaction::DoResolveProxyComplete(int result) {
pac_request_ = NULL;
if (result != OK)
return result;
// Remove unsupported proxies from the list.
proxy_info_.RemoveProxiesWithoutScheme(
ProxyServer::SCHEME_DIRECT | ProxyServer::SCHEME_HTTP |
ProxyServer::SCHEME_SOCKS4 | ProxyServer::SCHEME_SOCKS5);
if (proxy_info_.is_empty()) {
// No proxies/direct to choose from. This happens when we don't support any
// of the proxies in the returned list.
return ERR_NO_SUPPORTED_PROXIES;
}
next_state_ = STATE_INIT_CONNECTION;
return OK;
}
int HttpNetworkTransaction::DoInitConnection() {
DCHECK(!connection_->is_initialized());
DCHECK(proxy_info_.proxy_server().is_valid());
next_state_ = STATE_INIT_CONNECTION_COMPLETE;
using_ssl_ = request_->url.SchemeIs("https");
using_spdy_ = false;
// TODO(vandebo) get rid of proxy_mode_, it's redundant
if (proxy_info_.is_direct())
proxy_mode_ = kDirectConnection;
else if (proxy_info_.proxy_server().is_socks())
proxy_mode_ = kSOCKSProxy;
else if (using_ssl_)
proxy_mode_ = kHTTPProxyUsingTunnel;
else
proxy_mode_ = kHTTPProxy;
// Build the string used to uniquely identify connections of this type.
// Determine the host and port to connect to.
std::string connection_group;
std::string host;
int port;
if (proxy_mode_ != kDirectConnection) {
ProxyServer proxy_server = proxy_info_.proxy_server();
connection_group = "proxy/" + proxy_server.ToURI() + "/";
host = proxy_server.HostNoBrackets();
port = proxy_server.port();
} else {
host = request_->url.HostNoBrackets();
port = request_->url.EffectiveIntPort();
if (alternate_protocol_mode_ == kUnspecified) {
const HttpAlternateProtocols& alternate_protocols =
session_->alternate_protocols();
if (alternate_protocols.HasAlternateProtocolFor(host, port)) {
HttpAlternateProtocols::PortProtocolPair alternate =
alternate_protocols.GetAlternateProtocolFor(host, port);
if (alternate.protocol != HttpAlternateProtocols::BROKEN) {
DCHECK_EQ(HttpAlternateProtocols::NPN_SPDY, alternate.protocol);
port = alternate.port;
using_ssl_ = true;
alternate_protocol_ = HttpAlternateProtocols::NPN_SPDY;
alternate_protocol_mode_ = kUsingAlternateProtocol;
}
}
}
}
// Use the fixed testing ports if they've been provided.
if (using_ssl_) {
if (session_->fixed_https_port() != 0)
port = session_->fixed_https_port();
} else if (session_->fixed_http_port() != 0) {
port = session_->fixed_http_port();
}
// Check first if we have a spdy session for this group. If so, then go
// straight to using that.
HostPortPair host_port_pair(host, port);
if (session_->spdy_session_pool()->HasSession(host_port_pair)) {
using_spdy_ = true;
return OK;
}
// For a connection via HTTP proxy not using CONNECT, the connection
// is to the proxy server only. For all other cases
// (direct, HTTP proxy CONNECT, SOCKS), the connection is upto the
// url endpoint. Hence we append the url data into the connection_group.
if (proxy_mode_ != kHTTPProxy)
connection_group.append(request_->url.GetOrigin().spec());
DCHECK(!connection_group.empty());
// If the user is refreshing the page, bypass the host cache.
bool disable_resolver_cache = request_->load_flags & LOAD_BYPASS_CACHE ||
request_->load_flags & LOAD_VALIDATE_CACHE ||
request_->load_flags & LOAD_DISABLE_CACHE;
TCPSocketParams tcp_params(host, port, request_->priority, request_->referrer,
disable_resolver_cache);
int rv;
if (proxy_mode_ != kSOCKSProxy) {
rv = connection_->Init(connection_group, tcp_params, request_->priority,
&io_callback_, session_->tcp_socket_pool(),
net_log_);
} else {
bool socks_v5 = proxy_info_.proxy_server().scheme() ==
ProxyServer::SCHEME_SOCKS5;
SOCKSSocketParams socks_params(tcp_params, socks_v5,
request_->url.HostNoBrackets(),
request_->url.EffectiveIntPort(),
request_->priority, request_->referrer);
rv = connection_->Init(connection_group, socks_params, request_->priority,
&io_callback_, session_->socks_socket_pool(),
net_log_);
}
return rv;
}
int HttpNetworkTransaction::DoInitConnectionComplete(int result) {
if (result < 0) {
if (alternate_protocol_mode_ == kUsingAlternateProtocol) {
// Mark the alternate protocol as broken and fallback.
MarkBrokenAlternateProtocolAndFallback();
return OK;
}
return ReconsiderProxyAfterError(result);
}
DCHECK_EQ(OK, result);
if (using_spdy_) {
DCHECK(!connection_->is_initialized());
next_state_ = STATE_SPDY_SEND_REQUEST;
return OK;
}
LogHttpConnectedMetrics(*connection_);
// Set the reused_socket_ flag to indicate that we are using a keep-alive
// connection. This flag is used to handle errors that occur while we are
// trying to reuse a keep-alive connection.
reused_socket_ = connection_->is_reused();
if (reused_socket_) {
next_state_ = STATE_SEND_REQUEST;
} else {
// Now we have a TCP connected socket. Perform other connection setup as
// needed.
UpdateConnectionTypeHistograms(CONNECTION_HTTP);
if (using_ssl_ && (proxy_mode_ == kDirectConnection ||
proxy_mode_ == kSOCKSProxy)) {
next_state_ = STATE_SSL_CONNECT;
} else {
next_state_ = STATE_SEND_REQUEST;
if (proxy_mode_ == kHTTPProxyUsingTunnel)
establishing_tunnel_ = true;
}
}
return OK;
}
int HttpNetworkTransaction::DoSSLConnect() {
next_state_ = STATE_SSL_CONNECT_COMPLETE;
if (request_->load_flags & LOAD_VERIFY_EV_CERT)
ssl_config_.verify_ev_cert = true;
ssl_connect_start_time_ = base::TimeTicks::Now();
// Add a SSL socket on top of our existing transport socket.
ClientSocket* s = connection_->release_socket();
s = session_->socket_factory()->CreateSSLClientSocket(
s, request_->url.HostNoBrackets(), ssl_config_);
connection_->set_socket(s);
return connection_->socket()->Connect(&io_callback_, net_log_);
}
int HttpNetworkTransaction::DoSSLConnectComplete(int result) {
SSLClientSocket* ssl_socket =
reinterpret_cast<SSLClientSocket*>(connection_->socket());
SSLClientSocket::NextProtoStatus status =
SSLClientSocket::kNextProtoUnsupported;
std::string proto;
// GetNextProto will fail and and trigger a NOTREACHED if we pass in a socket
// that hasn't had SSL_ImportFD called on it. If we get a certificate error
// here, then we know that we called SSL_ImportFD.
if (result == OK || IsCertificateError(result))
status = ssl_socket->GetNextProto(&proto);
static const char kSpdyProto[] = "spdy";
using_spdy_ = (status == SSLClientSocket::kNextProtoNegotiated &&
proto == kSpdyProto);
if (alternate_protocol_mode_ == kUsingAlternateProtocol &&
alternate_protocol_ == HttpAlternateProtocols::NPN_SPDY &&
!using_spdy_) {
// We tried using the NPN_SPDY alternate protocol, but failed, so we
// fallback.
MarkBrokenAlternateProtocolAndFallback();
return OK;
}
if (IsCertificateError(result)) {
result = HandleCertificateError(result);
if (result == OK && !connection_->socket()->IsConnectedAndIdle()) {
connection_->socket()->Disconnect();
connection_->Reset();
next_state_ = STATE_INIT_CONNECTION;
return result;
}
}
if (result == OK) {
DCHECK(ssl_connect_start_time_ != base::TimeTicks());
base::TimeDelta connect_duration =
base::TimeTicks::Now() - ssl_connect_start_time_;
if (using_spdy_) {
UMA_HISTOGRAM_CUSTOM_TIMES("Net.SpdyConnectionLatency",
connect_duration,
base::TimeDelta::FromMilliseconds(1),
base::TimeDelta::FromMinutes(10),
100);
UpdateConnectionTypeHistograms(CONNECTION_SPDY);
next_state_ = STATE_SPDY_SEND_REQUEST;
} else {
UMA_HISTOGRAM_CUSTOM_TIMES("Net.SSL_Connection_Latency",
connect_duration,
base::TimeDelta::FromMilliseconds(1),
base::TimeDelta::FromMinutes(10),
100);
next_state_ = STATE_SEND_REQUEST;
}
} else if (result == ERR_SSL_CLIENT_AUTH_CERT_NEEDED) {
result = HandleCertificateRequest(result);
} else {
result = HandleSSLHandshakeError(result);
}
return result;
}
int HttpNetworkTransaction::DoSendRequest() {
next_state_ = STATE_SEND_REQUEST_COMPLETE;
UploadDataStream* request_body = NULL;
if (!establishing_tunnel_ && request_->upload_data) {
int error_code;
request_body = UploadDataStream::Create(request_->upload_data, &error_code);
if (!request_body)
return error_code;
}
// This is constructed lazily (instead of within our Start method), so that
// we have proxy info available.
if (request_headers_.empty()) {
// Figure out if we can/should add Proxy-Authentication & Authentication
// headers.
bool have_proxy_auth =
ShouldApplyProxyAuth() &&
(HaveAuth(HttpAuth::AUTH_PROXY) ||
SelectPreemptiveAuth(HttpAuth::AUTH_PROXY));
bool have_server_auth =
ShouldApplyServerAuth() &&
(HaveAuth(HttpAuth::AUTH_SERVER) ||
SelectPreemptiveAuth(HttpAuth::AUTH_SERVER));
HttpRequestHeaders request_headers;
HttpRequestHeaders authorization_headers;
// TODO(wtc): If BuildAuthorizationHeader fails (returns an authorization
// header with no credentials), we should return an error to prevent
// entering an infinite auth restart loop. See http://crbug.com/21050.
if (have_proxy_auth)
AddAuthorizationHeader(HttpAuth::AUTH_PROXY, &authorization_headers);
if (have_server_auth)
AddAuthorizationHeader(HttpAuth::AUTH_SERVER, &authorization_headers);
if (establishing_tunnel_) {
BuildTunnelRequest(request_, authorization_headers, &request_headers);
} else {
BuildRequestHeaders(request_, authorization_headers, request_body,
proxy_mode_ == kHTTPProxy, &request_headers);
}
request_headers_ = request_headers.ToString();
}
headers_valid_ = false;
http_stream_.reset(new HttpBasicStream(connection_.get(), net_log_));
return http_stream_->SendRequest(request_, request_headers_,
request_body, &response_, &io_callback_);
}
int HttpNetworkTransaction::DoSendRequestComplete(int result) {
if (result < 0)
return HandleIOError(result);
next_state_ = STATE_READ_HEADERS;
return OK;
}
int HttpNetworkTransaction::DoReadHeaders() {
next_state_ = STATE_READ_HEADERS_COMPLETE;
return http_stream_->ReadResponseHeaders(&io_callback_);
}
int HttpNetworkTransaction::HandleConnectionClosedBeforeEndOfHeaders() {
if (establishing_tunnel_) {
// The connection was closed before the tunnel could be established.
return ERR_TUNNEL_CONNECTION_FAILED;
}
if (!response_.headers) {
// The connection was closed before any data was sent. Likely an error
// rather than empty HTTP/0.9 response.
return ERR_EMPTY_RESPONSE;
}
return OK;
}
int HttpNetworkTransaction::DoReadHeadersComplete(int result) {
// We can get a certificate error or ERR_SSL_CLIENT_AUTH_CERT_NEEDED here
// due to SSL renegotiation.
if (using_ssl_) {
if (IsCertificateError(result)) {
// We don't handle a certificate error during SSL renegotiation, so we
// have to return an error that's not in the certificate error range
// (-2xx).
LOG(ERROR) << "Got a server certificate with error " << result
<< " during SSL renegotiation";
result = ERR_CERT_ERROR_IN_SSL_RENEGOTIATION;
} else if (result == ERR_SSL_CLIENT_AUTH_CERT_NEEDED) {
result = HandleCertificateRequest(result);
if (result == OK)
return result;
}
}
if (result < 0 && result != ERR_CONNECTION_CLOSED)
return HandleIOError(result);
if (result == ERR_CONNECTION_CLOSED && ShouldResendRequest(result)) {
ResetConnectionAndRequestForResend();
return OK;
}
// After we call RestartWithAuth a new response_time will be recorded, and
// we need to be cautious about incorrectly logging the duration across the
// authentication activity.
if (!logged_response_time) {
LogTransactionConnectedMetrics();
logged_response_time = true;
}
if (result == ERR_CONNECTION_CLOSED) {
// For now, if we get at least some data, we do the best we can to make
// sense of it and send it back up the stack.
int rv = HandleConnectionClosedBeforeEndOfHeaders();
if (rv != OK)
return rv;
}
if (response_.headers->GetParsedHttpVersion() < HttpVersion(1, 0)) {
// Require the "HTTP/1.x" status line for SSL CONNECT.
if (establishing_tunnel_)
return ERR_TUNNEL_CONNECTION_FAILED;
// HTTP/0.9 doesn't support the PUT method, so lack of response headers
// indicates a buggy server. See:
// https://bugzilla.mozilla.org/show_bug.cgi?id=193921
if (request_->method == "PUT")
return ERR_METHOD_NOT_SUPPORTED;
}
if (establishing_tunnel_) {
switch (response_.headers->response_code()) {
case 200: // OK
if (http_stream_->IsMoreDataBuffered()) {
// The proxy sent extraneous data after the headers.
return ERR_TUNNEL_CONNECTION_FAILED;
}
next_state_ = STATE_SSL_CONNECT;
// Reset for the real request and response headers.
request_headers_.clear();
http_stream_.reset(new HttpBasicStream(connection_.get(), net_log_));
headers_valid_ = false;
establishing_tunnel_ = false;
// TODO(mbelshe): We should put in a test case to trip this code path.
response_ = HttpResponseInfo();
return OK;
// We aren't able to CONNECT to the remote host through the proxy. We
// need to be very suspicious about the response because an active network
// attacker can force us into this state by masquerading as the proxy.
// The only safe thing to do here is to fail the connection because our
// client is expecting an SSL protected response.
// See http://crbug.com/7338.
case 407: // Proxy Authentication Required
// We need this status code to allow proxy authentication. Our
// authentication code is smart enough to avoid being tricked by an
// active network attacker.
break;
default:
// For all other status codes, we conservatively fail the CONNECT
// request.
// We lose something by doing this. We have seen proxy 403, 404, and
// 501 response bodies that contain a useful error message. For
// example, Squid uses a 404 response to report the DNS error: "The
// domain name does not exist."
LogBlockedTunnelResponse(response_.headers->response_code());
return ERR_TUNNEL_CONNECTION_FAILED;
}
}
// Check for an intermediate 100 Continue response. An origin server is
// allowed to send this response even if we didn't ask for it, so we just
// need to skip over it.
// We treat any other 1xx in this same way (although in practice getting
// a 1xx that isn't a 100 is rare).
if (response_.headers->response_code() / 100 == 1) {
response_.headers = new HttpResponseHeaders("");
next_state_ = STATE_READ_HEADERS;
return OK;
}
HostPortPair http_host_port_pair;
http_host_port_pair.host = request_->url.host();
http_host_port_pair.port = request_->url.EffectiveIntPort();
ProcessAlternateProtocol(*response_.headers,
http_host_port_pair,
session_->mutable_alternate_protocols());
int rv = HandleAuthChallenge();
if (rv != OK)
return rv;
if (using_ssl_ && !establishing_tunnel_) {
SSLClientSocket* ssl_socket =
reinterpret_cast<SSLClientSocket*>(connection_->socket());
ssl_socket->GetSSLInfo(&response_.ssl_info);
}
headers_valid_ = true;
return OK;
}
int HttpNetworkTransaction::DoResolveCanonicalName() {
HttpAuthHandler* auth_handler = auth_handler_[pending_auth_target_];
DCHECK(auth_handler);
next_state_ = STATE_RESOLVE_CANONICAL_NAME_COMPLETE;
return auth_handler->ResolveCanonicalName(session_->host_resolver(),
&io_callback_, net_log_);
}
int HttpNetworkTransaction::DoResolveCanonicalNameComplete(int result) {
// The STATE_RESOLVE_CANONICAL_NAME state ends the Start sequence when the
// canonical name of the server needs to be determined. Normally
// DoReadHeadersComplete completes the sequence. The next state is
// intentionally not set as it should be STATE_NONE;
DCHECK_EQ(STATE_NONE, next_state_);
return result;
}
int HttpNetworkTransaction::DoReadBody() {
DCHECK(read_buf_);
DCHECK_GT(read_buf_len_, 0);
DCHECK(connection_->is_initialized());
next_state_ = STATE_READ_BODY_COMPLETE;
return http_stream_->ReadResponseBody(read_buf_, read_buf_len_,
&io_callback_);
}
int HttpNetworkTransaction::DoReadBodyComplete(int result) {
// We are done with the Read call.
DCHECK(!establishing_tunnel_) <<
"We should never read a response body of a tunnel.";
bool done = false, keep_alive = false;
if (result <= 0)
done = true;
if (http_stream_->IsResponseBodyComplete()) {
done = true;
if (http_stream_->CanFindEndOfResponse())
keep_alive = GetResponseHeaders()->IsKeepAlive();
}
// Clean up connection_->if we are done.
if (done) {
LogTransactionMetrics();
if (!keep_alive)
connection_->socket()->Disconnect();
connection_->Reset();
// The next Read call will return 0 (EOF).
}
// Clear these to avoid leaving around old state.
read_buf_ = NULL;
read_buf_len_ = 0;
return result;
}
int HttpNetworkTransaction::DoDrainBodyForAuthRestart() {
// This method differs from DoReadBody only in the next_state_. So we just
// call DoReadBody and override the next_state_. Perhaps there is a more
// elegant way for these two methods to share code.
int rv = DoReadBody();
DCHECK(next_state_ == STATE_READ_BODY_COMPLETE);
next_state_ = STATE_DRAIN_BODY_FOR_AUTH_RESTART_COMPLETE;
return rv;
}
// TODO(wtc): This method and the DoReadBodyComplete method are almost
// the same. Figure out a good way for these two methods to share code.
int HttpNetworkTransaction::DoDrainBodyForAuthRestartComplete(int result) {
// keep_alive defaults to true because the very reason we're draining the
// response body is to reuse the connection for auth restart.
bool done = false, keep_alive = true;
if (result < 0) {
// Error or closed connection while reading the socket.
done = true;
keep_alive = false;
} else if (http_stream_->IsResponseBodyComplete()) {
done = true;
}
if (done) {
DidDrainBodyForAuthRestart(keep_alive);
} else {
// Keep draining.
next_state_ = STATE_DRAIN_BODY_FOR_AUTH_RESTART;
}
return OK;
}
int HttpNetworkTransaction::DoSpdySendRequest() {
next_state_ = STATE_SPDY_SEND_REQUEST_COMPLETE;
CHECK(!spdy_stream_.get());
// First we get a SPDY session. Theoretically, we've just negotiated one, but
// if one already exists, then screw it, use the existing one! Otherwise,
// use the existing TCP socket.
HostPortPair host_port_pair(request_->url.HostNoBrackets(),
request_->url.EffectiveIntPort());
const scoped_refptr<SpdySessionPool> spdy_pool =
session_->spdy_session_pool();
scoped_refptr<SpdySession> spdy_session;
if (spdy_pool->HasSession(host_port_pair)) {
spdy_session = spdy_pool->Get(host_port_pair, session_);
} else {
// SPDY is negotiated using the TLS next protocol negotiation (NPN)
// extension, so |connection_| must contain an SSLClientSocket.
DCHECK(using_ssl_);
spdy_session = spdy_pool->GetSpdySessionFromSSLSocket(
host_port_pair, session_, connection_.release());
}
CHECK(spdy_session.get());
UploadDataStream* upload_data = NULL;
if (request_->upload_data) {
int error_code = OK;
upload_data = UploadDataStream::Create(request_->upload_data, &error_code);
if (!upload_data)
return error_code;
}
headers_valid_ = false;
spdy_stream_ = spdy_session->GetOrCreateStream(
*request_, upload_data, net_log_);
return spdy_stream_->SendRequest(upload_data, &response_, &io_callback_);
}
int HttpNetworkTransaction::DoSpdySendRequestComplete(int result) {
if (result < 0)
return result;
next_state_ = STATE_SPDY_READ_HEADERS;
return OK;
}
int HttpNetworkTransaction::DoSpdyReadHeaders() {
next_state_ = STATE_SPDY_READ_HEADERS_COMPLETE;
return spdy_stream_->ReadResponseHeaders(&io_callback_);
}
int HttpNetworkTransaction::DoSpdyReadHeadersComplete(int result) {
// TODO(willchan): Flesh out the support for HTTP authentication here.
if (result == OK)
headers_valid_ = true;
return result;
}
int HttpNetworkTransaction::DoSpdyReadBody() {
next_state_ = STATE_SPDY_READ_BODY_COMPLETE;
return spdy_stream_->ReadResponseBody(
read_buf_, read_buf_len_, &io_callback_);
}
int HttpNetworkTransaction::DoSpdyReadBodyComplete(int result) {
read_buf_ = NULL;
read_buf_len_ = 0;
if (result <= 0)
spdy_stream_ = NULL;
return result;
}
void HttpNetworkTransaction::LogHttpConnectedMetrics(
const ClientSocketHandle& handle) {
UMA_HISTOGRAM_ENUMERATION("Net.HttpSocketType", handle.reuse_type(),
ClientSocketHandle::NUM_TYPES);
switch (handle.reuse_type()) {
case ClientSocketHandle::UNUSED:
UMA_HISTOGRAM_CUSTOM_TIMES("Net.HttpConnectionLatency",
handle.setup_time(),
base::TimeDelta::FromMilliseconds(1),
base::TimeDelta::FromMinutes(10),
100);
break;
case ClientSocketHandle::UNUSED_IDLE:
UMA_HISTOGRAM_CUSTOM_TIMES("Net.SocketIdleTimeBeforeNextUse_UnusedSocket",
handle.idle_time(),
base::TimeDelta::FromMilliseconds(1),
base::TimeDelta::FromMinutes(6),
100);
break;
case ClientSocketHandle::REUSED_IDLE:
UMA_HISTOGRAM_CUSTOM_TIMES("Net.SocketIdleTimeBeforeNextUse_ReusedSocket",
handle.idle_time(),
base::TimeDelta::FromMilliseconds(1),
base::TimeDelta::FromMinutes(6),
100);
break;
default:
NOTREACHED();
break;
}
}
void HttpNetworkTransaction::LogIOErrorMetrics(
const ClientSocketHandle& handle) {
UMA_HISTOGRAM_ENUMERATION("Net.IOError_SocketReuseType",
handle.reuse_type(), ClientSocketHandle::NUM_TYPES);
switch (handle.reuse_type()) {
case ClientSocketHandle::UNUSED:
break;
case ClientSocketHandle::UNUSED_IDLE:
UMA_HISTOGRAM_CUSTOM_TIMES(
"Net.SocketIdleTimeOnIOError2_UnusedSocket",
handle.idle_time(), base::TimeDelta::FromMilliseconds(1),
base::TimeDelta::FromMinutes(6), 100);
break;
case ClientSocketHandle::REUSED_IDLE:
UMA_HISTOGRAM_CUSTOM_TIMES(
"Net.SocketIdleTimeOnIOError2_ReusedSocket",
handle.idle_time(), base::TimeDelta::FromMilliseconds(1),
base::TimeDelta::FromMinutes(6), 100);
break;
default:
NOTREACHED();
break;
}
}
void HttpNetworkTransaction::LogTransactionConnectedMetrics() const {
base::TimeDelta total_duration = response_.response_time - start_time_;
UMA_HISTOGRAM_CLIPPED_TIMES(
"Net.Transaction_Connected_Under_10",
total_duration,
base::TimeDelta::FromMilliseconds(1), base::TimeDelta::FromMinutes(10),
100);
if (!reused_socket_) {
UMA_HISTOGRAM_CLIPPED_TIMES(
"Net.Transaction_Connected_New",
total_duration,
base::TimeDelta::FromMilliseconds(1), base::TimeDelta::FromMinutes(10),
100);
}
// Currently, non-zero priority requests are frame or sub-frame resource
// types. This will change when we also prioritize certain subresources like
// css, js, etc.
if (request_->priority) {
UMA_HISTOGRAM_CLIPPED_TIMES(
"Net.Priority_High_Latency",
total_duration,
base::TimeDelta::FromMilliseconds(1), base::TimeDelta::FromMinutes(10),
100);
} else {
UMA_HISTOGRAM_CLIPPED_TIMES(
"Net.Priority_Low_Latency",
total_duration,
base::TimeDelta::FromMilliseconds(1), base::TimeDelta::FromMinutes(10),
100);
}
}
void HttpNetworkTransaction::LogTransactionMetrics() const {
base::TimeDelta duration = base::Time::Now() -
response_.request_time;
if (60 < duration.InMinutes())
return;
base::TimeDelta total_duration = base::Time::Now() - start_time_;
UMA_HISTOGRAM_LONG_TIMES("Net.Transaction_Latency", duration);
UMA_HISTOGRAM_CLIPPED_TIMES("Net.Transaction_Latency_Under_10", duration,
base::TimeDelta::FromMilliseconds(1), base::TimeDelta::FromMinutes(10),
100);
UMA_HISTOGRAM_CLIPPED_TIMES("Net.Transaction_Latency_Total_Under_10",
total_duration, base::TimeDelta::FromMilliseconds(1),
base::TimeDelta::FromMinutes(10), 100);
if (!reused_socket_) {
UMA_HISTOGRAM_CLIPPED_TIMES(
"Net.Transaction_Latency_Total_New_Connection_Under_10",
total_duration, base::TimeDelta::FromMilliseconds(1),
base::TimeDelta::FromMinutes(10), 100);
}
}
void HttpNetworkTransaction::LogBlockedTunnelResponse(
int response_code) const {
LOG(WARNING) << "Blocked proxy response with status " << response_code
<< " to CONNECT request for "
<< GetHostAndPort(request_->url) << ".";
}
int HttpNetworkTransaction::HandleCertificateError(int error) {
DCHECK(using_ssl_);
DCHECK(IsCertificateError(error));
SSLClientSocket* ssl_socket =
reinterpret_cast<SSLClientSocket*>(connection_->socket());
ssl_socket->GetSSLInfo(&response_.ssl_info);
// Add the bad certificate to the set of allowed certificates in the
// SSL info object. This data structure will be consulted after calling
// RestartIgnoringLastError(). And the user will be asked interactively
// before RestartIgnoringLastError() is ever called.
SSLConfig::CertAndStatus bad_cert;
bad_cert.cert = response_.ssl_info.cert;
bad_cert.cert_status = response_.ssl_info.cert_status;
ssl_config_.allowed_bad_certs.push_back(bad_cert);
if (g_ignore_certificate_errors)
return OK;
const int kCertFlags = LOAD_IGNORE_CERT_COMMON_NAME_INVALID |
LOAD_IGNORE_CERT_DATE_INVALID |
LOAD_IGNORE_CERT_AUTHORITY_INVALID |
LOAD_IGNORE_CERT_WRONG_USAGE;
if (request_->load_flags & kCertFlags) {
switch (error) {
case ERR_CERT_COMMON_NAME_INVALID:
if (request_->load_flags & LOAD_IGNORE_CERT_COMMON_NAME_INVALID)
error = OK;
break;
case ERR_CERT_DATE_INVALID:
if (request_->load_flags & LOAD_IGNORE_CERT_DATE_INVALID)
error = OK;
break;
case ERR_CERT_AUTHORITY_INVALID:
if (request_->load_flags & LOAD_IGNORE_CERT_AUTHORITY_INVALID)
error = OK;
break;
}
}
return error;
}
int HttpNetworkTransaction::HandleCertificateRequest(int error) {
// Assert that the socket did not send a client certificate.
// Note: If we got a reused socket, it was created with some other
// transaction's ssl_config_, so we need to disable this assertion. We can
// get a certificate request on a reused socket when the server requested
// renegotiation (rehandshake).
// TODO(wtc): add a GetSSLParams method to SSLClientSocket so we can query
// the SSL parameters it was created with and get rid of the reused_socket_
// test.
DCHECK(reused_socket_ || !ssl_config_.send_client_cert);
response_.cert_request_info = new SSLCertRequestInfo;
SSLClientSocket* ssl_socket =
reinterpret_cast<SSLClientSocket*>(connection_->socket());
ssl_socket->GetSSLCertRequestInfo(response_.cert_request_info);
// Close the connection while the user is selecting a certificate to send
// to the server.
connection_->socket()->Disconnect();
connection_->Reset();
// If the user selected one of the certificate in client_certs for this
// server before, use it automatically.
X509Certificate* client_cert = session_->ssl_client_auth_cache()->
Lookup(GetHostAndPort(request_->url));
if (client_cert) {
const std::vector<scoped_refptr<X509Certificate> >& client_certs =
response_.cert_request_info->client_certs;
for (size_t i = 0; i < client_certs.size(); ++i) {
if (client_cert->fingerprint().Equals(client_certs[i]->fingerprint())) {
ssl_config_.client_cert = client_cert;
ssl_config_.send_client_cert = true;
next_state_ = STATE_INIT_CONNECTION;
// Reset the other member variables.
// Note: this is necessary only with SSL renegotiation.
ResetStateForRestart();
return OK;
}
}
}
return error;
}
int HttpNetworkTransaction::HandleSSLHandshakeError(int error) {
if (ssl_config_.send_client_cert &&
(error == ERR_SSL_PROTOCOL_ERROR ||
error == ERR_BAD_SSL_CLIENT_AUTH_CERT)) {
session_->ssl_client_auth_cache()->Remove(GetHostAndPort(request_->url));
}
switch (error) {
case ERR_SSL_PROTOCOL_ERROR:
case ERR_SSL_VERSION_OR_CIPHER_MISMATCH:
if (ssl_config_.tls1_enabled) {
// This could be a TLS-intolerant server or an SSL 3.0 server that
// chose a TLS-only cipher suite. Turn off TLS 1.0 and retry.
ssl_config_.tls1_enabled = false;
connection_->socket()->Disconnect();
connection_->Reset();
next_state_ = STATE_INIT_CONNECTION;
error = OK;
}
break;
}
return error;
}
// This method determines whether it is safe to resend the request after an
// IO error. It can only be called in response to request header or body
// write errors or response header read errors. It should not be used in
// other cases, such as a Connect error.
int HttpNetworkTransaction::HandleIOError(int error) {
switch (error) {
// If we try to reuse a connection that the server is in the process of
// closing, we may end up successfully writing out our request (or a
// portion of our request) only to find a connection error when we try to
// read from (or finish writing to) the socket.
case ERR_CONNECTION_RESET:
case ERR_CONNECTION_CLOSED:
case ERR_CONNECTION_ABORTED:
LogIOErrorMetrics(*connection_);
if (ShouldResendRequest(error)) {
ResetConnectionAndRequestForResend();
error = OK;
}
break;
}
return error;
}
void HttpNetworkTransaction::ResetStateForRestart() {
pending_auth_target_ = HttpAuth::AUTH_NONE;
read_buf_ = NULL;
read_buf_len_ = 0;
http_stream_.reset();
headers_valid_ = false;
request_headers_.clear();
response_ = HttpResponseInfo();
}
HttpResponseHeaders* HttpNetworkTransaction::GetResponseHeaders() const {
return response_.headers;
}
bool HttpNetworkTransaction::ShouldResendRequest(int error) const {
// NOTE: we resend a request only if we reused a keep-alive connection.
// This automatically prevents an infinite resend loop because we'll run
// out of the cached keep-alive connections eventually.
if (establishing_tunnel_ ||
!connection_->ShouldResendFailedRequest(error) ||
GetResponseHeaders()) { // We have received some response headers.
return false;
}
return true;
}
void HttpNetworkTransaction::ResetConnectionAndRequestForResend() {
connection_->socket()->Disconnect();
connection_->Reset();
// We need to clear request_headers_ because it contains the real request
// headers, but we may need to resend the CONNECT request first to recreate
// the SSL tunnel.
request_headers_.clear();
next_state_ = STATE_INIT_CONNECTION; // Resend the request.
}
int HttpNetworkTransaction::ReconsiderProxyAfterError(int error) {
DCHECK(!pac_request_);
// A failure to resolve the hostname or any error related to establishing a
// TCP connection could be grounds for trying a new proxy configuration.
//
// Why do this when a hostname cannot be resolved? Some URLs only make sense
// to proxy servers. The hostname in those URLs might fail to resolve if we
// are still using a non-proxy config. We need to check if a proxy config
// now exists that corresponds to a proxy server that could load the URL.
//
switch (error) {
case ERR_NAME_NOT_RESOLVED:
case ERR_INTERNET_DISCONNECTED:
case ERR_ADDRESS_UNREACHABLE:
case ERR_CONNECTION_CLOSED:
case ERR_CONNECTION_RESET:
case ERR_CONNECTION_REFUSED:
case ERR_CONNECTION_ABORTED:
case ERR_TIMED_OUT:
case ERR_TUNNEL_CONNECTION_FAILED:
case ERR_SOCKS_CONNECTION_FAILED:
break;
case ERR_SOCKS_CONNECTION_HOST_UNREACHABLE:
// Remap the SOCKS-specific "host unreachable" error to a more
// generic error code (this way consumers like the link doctor
// know to substitute their error page).
//
// Note that if the host resolving was done by the SOCSK5 proxy, we can't
// differentiate between a proxy-side "host not found" versus a proxy-side
// "address unreachable" error, and will report both of these failures as
// ERR_ADDRESS_UNREACHABLE.
return ERR_ADDRESS_UNREACHABLE;
default:
return error;
}
if (request_->load_flags & LOAD_BYPASS_PROXY) {
return error;
}
int rv = session_->proxy_service()->ReconsiderProxyAfterError(
request_->url, &proxy_info_, &io_callback_, &pac_request_, net_log_);
if (rv == OK || rv == ERR_IO_PENDING) {
// If the error was during connection setup, there is no socket to
// disconnect.
if (connection_->socket())
connection_->socket()->Disconnect();
connection_->Reset();
next_state_ = STATE_RESOLVE_PROXY_COMPLETE;
} else {
// If ReconsiderProxyAfterError() failed synchronously, it means
// there was nothing left to fall-back to, so fail the transaction
// with the last connection error we got.
// TODO(eroman): This is a confusing contract, make it more obvious.
rv = error;
}
return rv;
}
bool HttpNetworkTransaction::ShouldApplyProxyAuth() const {
return (proxy_mode_ == kHTTPProxy) || establishing_tunnel_;
}
bool HttpNetworkTransaction::ShouldApplyServerAuth() const {
return !establishing_tunnel_ &&
!(request_->load_flags & LOAD_DO_NOT_SEND_AUTH_DATA);
}
void HttpNetworkTransaction::AddAuthorizationHeader(
HttpAuth::Target target, HttpRequestHeaders* authorization_headers) const {
DCHECK(HaveAuth(target));
// Add a Authorization/Proxy-Authorization header line.
std::string auth_token;
int rv;
if (auth_identity_[target].source ==
HttpAuth::IDENT_SRC_DEFAULT_CREDENTIALS) {
rv = auth_handler_[target]->GenerateDefaultAuthToken(
request_, &proxy_info_, &auth_token);
} else {
rv = auth_handler_[target]->GenerateAuthToken(
auth_identity_[target].username,
auth_identity_[target].password,
request_, &proxy_info_, &auth_token);
}
if (rv == OK) {
authorization_headers->SetHeader(
HttpAuth::GetAuthorizationHeaderName(target), auth_token);
}
// TODO(cbentzel): Evict username and password from cache on non-OK return?
// TODO(cbentzel): Never use this scheme again if
// ERR_UNSUPPORTED_AUTH_SCHEME is returned.
}
GURL HttpNetworkTransaction::AuthOrigin(HttpAuth::Target target) const {
return target == HttpAuth::AUTH_PROXY ?
GURL("http://" + proxy_info_.proxy_server().host_and_port()) :
request_->url.GetOrigin();
}
std::string HttpNetworkTransaction::AuthPath(HttpAuth::Target target)
const {
// Proxy authentication realms apply to all paths. So we will use
// empty string in place of an absolute path.
return target == HttpAuth::AUTH_PROXY ?
std::string() : request_->url.path();
}
// static
std::string HttpNetworkTransaction::AuthTargetString(
HttpAuth::Target target) {
return target == HttpAuth::AUTH_PROXY ? "proxy" : "server";
}
void HttpNetworkTransaction::InvalidateRejectedAuthFromCache(
HttpAuth::Target target,
const GURL& auth_origin) {
DCHECK(HaveAuth(target));
// TODO(eroman): this short-circuit can be relaxed. If the realm of
// the preemptively used auth entry matches the realm of the subsequent
// challenge, then we can invalidate the preemptively used entry.
// Otherwise as-is we may send the failed credentials one extra time.
if (auth_identity_[target].source == HttpAuth::IDENT_SRC_PATH_LOOKUP)
return;
// Clear the cache entry for the identity we just failed on.
// Note: we require the username/password to match before invalidating
// since the entry in the cache may be newer than what we used last time.
session_->auth_cache()->Remove(auth_origin,
auth_handler_[target]->realm(),
auth_identity_[target].username,
auth_identity_[target].password);
}
bool HttpNetworkTransaction::SelectPreemptiveAuth(HttpAuth::Target target) {
DCHECK(!HaveAuth(target));
// Don't do preemptive authorization if the URL contains a username/password,
// since we must first be challenged in order to use the URL's identity.
if (request_->url.has_username())
return false;
// SelectPreemptiveAuth() is on the critical path for each request, so it
// is expected to be fast. LookupByPath() is fast in the common case, since
// the number of http auth cache entries is expected to be very small.
// (For most users in fact, it will be 0.)
HttpAuthCache::Entry* entry = session_->auth_cache()->LookupByPath(
AuthOrigin(target), AuthPath(target));
// We don't support preemptive authentication for connection-based
// authentication schemes because they can't reuse entry->handler().
// Hopefully we can remove this limitation in the future.
if (entry && !entry->handler()->is_connection_based()) {
auth_identity_[target].source = HttpAuth::IDENT_SRC_PATH_LOOKUP;
auth_identity_[target].invalid = false;
auth_identity_[target].username = entry->username();
auth_identity_[target].password = entry->password();
auth_handler_[target] = entry->handler();
return true;
}
// TODO(cbentzel): Preemptively use default credentials if they have worked
// for the origin/path in the past to save a round trip.
return false;
}
bool HttpNetworkTransaction::SelectNextAuthIdentityToTry(
HttpAuth::Target target,
const GURL& auth_origin) {
DCHECK(auth_handler_[target]);
DCHECK(auth_identity_[target].invalid);
// Try to use the username/password encoded into the URL first.
if (target == HttpAuth::AUTH_SERVER && request_->url.has_username() &&
!embedded_identity_used_) {
auth_identity_[target].source = HttpAuth::IDENT_SRC_URL;
auth_identity_[target].invalid = false;
// Extract the username:password from the URL.
GetIdentityFromURL(request_->url,
&auth_identity_[target].username,
&auth_identity_[target].password);
embedded_identity_used_ = true;
// TODO(eroman): If the password is blank, should we also try combining
// with a password from the cache?
return true;
}
// Check the auth cache for a realm entry.
HttpAuthCache::Entry* entry = session_->auth_cache()->LookupByRealm(
auth_origin, auth_handler_[target]->realm());
if (entry) {
// Disallow re-using of identity if the scheme of the originating challenge
// does not match. This protects against the following situation:
// 1. Browser prompts user to sign into DIGEST realm="Foo".
// 2. Since the auth-scheme is not BASIC, the user is reasured that it
// will not be sent over the wire in clear text. So they use their
// most trusted password.
// 3. Next, the browser receives a challenge for BASIC realm="Foo". This
// is the same realm that we have a cached identity for. However if
// we use that identity, it would get sent over the wire in
// clear text (which isn't what the user agreed to when entering it).
if (entry->handler()->scheme() == auth_handler_[target]->scheme()) {
auth_identity_[target].source = HttpAuth::IDENT_SRC_REALM_LOOKUP;
auth_identity_[target].invalid = false;
auth_identity_[target].username = entry->username();
auth_identity_[target].password = entry->password();
return true;
}
LOG(WARNING) << "The scheme of realm " << auth_handler_[target]->realm()
<< " has changed from " << entry->handler()->scheme()
<< " to " << auth_handler_[target]->scheme();
// Fall through.
}
// Use default credentials (single sign on) if this is the first attempt
// at identity. Do not allow multiple times as it will infinite loop.
// We use default credentials after checking the auth cache so that if
// single sign-on doesn't work, we won't try default credentials for future
// transactions.
if (!default_credentials_used_ &&
auth_handler_[target]->AllowsDefaultCredentials()) {
auth_identity_[target].source = HttpAuth::IDENT_SRC_DEFAULT_CREDENTIALS;
auth_identity_[target].invalid = false;
default_credentials_used_ = true;
return true;
}
return false;
}
std::string HttpNetworkTransaction::AuthChallengeLogMessage() const {
std::string msg;
std::string header_val;
void* iter = NULL;
scoped_refptr<HttpResponseHeaders> headers = GetResponseHeaders();
while (headers->EnumerateHeader(&iter, "proxy-authenticate", &header_val)) {
msg.append("\n Has header Proxy-Authenticate: ");
msg.append(header_val);
}
iter = NULL;
while (headers->EnumerateHeader(&iter, "www-authenticate", &header_val)) {
msg.append("\n Has header WWW-Authenticate: ");
msg.append(header_val);
}
// RFC 4559 requires that a proxy indicate its support of NTLM/Negotiate
// authentication with a "Proxy-Support: Session-Based-Authentication"
// response header.
iter = NULL;
while (headers->EnumerateHeader(&iter, "proxy-support", &header_val)) {
msg.append("\n Has header Proxy-Support: ");
msg.append(header_val);
}
return msg;
}
int HttpNetworkTransaction::HandleAuthChallenge() {
scoped_refptr<HttpResponseHeaders> headers = GetResponseHeaders();
DCHECK(headers);
int status = headers->response_code();
if (status != 401 && status != 407)
return OK;
HttpAuth::Target target = status == 407 ?
HttpAuth::AUTH_PROXY : HttpAuth::AUTH_SERVER;
GURL auth_origin = AuthOrigin(target);
LOG(INFO) << "The " << AuthTargetString(target) << " "
<< auth_origin << " requested auth"
<< AuthChallengeLogMessage();
if (target == HttpAuth::AUTH_PROXY && proxy_info_.is_direct())
return ERR_UNEXPECTED_PROXY_AUTH;
// The auth we tried just failed, hence it can't be valid. Remove it from
// the cache so it won't be used again.
// TODO(wtc): IsFinalRound is not the right condition. In a multi-round
// auth sequence, the server may fail the auth in round 1 if our first
// authorization header is broken. We should inspect response_.headers to
// determine if the server already failed the auth or wants us to continue.
// See http://crbug.com/21015.
if (HaveAuth(target) && auth_handler_[target]->IsFinalRound()) {
InvalidateRejectedAuthFromCache(target, auth_origin);
auth_handler_[target] = NULL;
auth_identity_[target] = HttpAuth::Identity();
}
auth_identity_[target].invalid = true;
if (target != HttpAuth::AUTH_SERVER ||
!(request_->load_flags & LOAD_DO_NOT_SEND_AUTH_DATA)) {
// Find the best authentication challenge that we support.
HttpAuth::ChooseBestChallenge(session_->http_auth_handler_factory(),
headers, target,
auth_origin, &auth_handler_[target]);
}
if (!auth_handler_[target]) {
if (establishing_tunnel_) {
LOG(ERROR) << "Can't perform auth to the " << AuthTargetString(target)
<< " " << auth_origin << " when establishing a tunnel"
<< AuthChallengeLogMessage();
// We are establishing a tunnel, we can't show the error page because an
// active network attacker could control its contents. Instead, we just
// fail to establish the tunnel.
DCHECK(target == HttpAuth::AUTH_PROXY);
return ERR_PROXY_AUTH_REQUESTED;
}
// We found no supported challenge -- let the transaction continue
// so we end up displaying the error page.
return OK;
}
if (auth_handler_[target]->NeedsIdentity()) {
// Pick a new auth identity to try, by looking to the URL and auth cache.
// If an identity to try is found, it is saved to auth_identity_[target].
SelectNextAuthIdentityToTry(target, auth_origin);
} else {
// Proceed with the existing identity or a null identity.
//
// TODO(wtc): Add a safeguard against infinite transaction restarts, if
// the server keeps returning "NTLM".
auth_identity_[target].invalid = false;
}
// Make a note that we are waiting for auth. This variable is inspected
// when the client calls RestartWithAuth() to pick up where we left off.
pending_auth_target_ = target;
if (auth_identity_[target].invalid) {
// We have exhausted all identity possibilities, all we can do now is
// pass the challenge information back to the client.
PopulateAuthChallenge(target, auth_origin);
}
// SPN determination (for Negotiate) requires a DNS lookup to find the
// canonical name. This needs to be done asynchronously to prevent blocking
// the IO thread.
if (auth_handler_[target]->NeedsCanonicalName())
next_state_ = STATE_RESOLVE_CANONICAL_NAME;
return OK;
}
void HttpNetworkTransaction::PopulateAuthChallenge(HttpAuth::Target target,
const GURL& auth_origin) {
// Populates response_.auth_challenge with the authentication challenge info.
// This info is consumed by URLRequestHttpJob::GetAuthChallengeInfo().
AuthChallengeInfo* auth_info = new AuthChallengeInfo;
auth_info->is_proxy = target == HttpAuth::AUTH_PROXY;
auth_info->host_and_port = ASCIIToWide(GetHostAndPort(auth_origin));
auth_info->scheme = ASCIIToWide(auth_handler_[target]->scheme());
// TODO(eroman): decode realm according to RFC 2047.
auth_info->realm = ASCIIToWide(auth_handler_[target]->realm());
response_.auth_challenge = auth_info;
}
void HttpNetworkTransaction::MarkBrokenAlternateProtocolAndFallback() {
HostPortPair http_host_port_pair;
http_host_port_pair.host = request_->url.host();
http_host_port_pair.port = request_->url.EffectiveIntPort();
session_->mutable_alternate_protocols()->MarkBrokenAlternateProtocolFor(
http_host_port_pair);
alternate_protocol_mode_ = kDoNotUseAlternateProtocol;
if (connection_->socket())
connection_->socket()->Disconnect();
connection_->Reset();
next_state_ = STATE_INIT_CONNECTION;
}
} // namespace net