http_network_transaction.cc revision 7dbb3d5cf0c15f500944d211057644d6a2f37371
1// Copyright (c) 2012 The Chromium Authors. All rights reserved. 2// Use of this source code is governed by a BSD-style license that can be 3// found in the LICENSE file. 4 5#include "net/http/http_network_transaction.h" 6 7#include <set> 8#include <vector> 9 10#include "base/bind.h" 11#include "base/bind_helpers.h" 12#include "base/compiler_specific.h" 13#include "base/format_macros.h" 14#include "base/memory/scoped_ptr.h" 15#include "base/metrics/field_trial.h" 16#include "base/metrics/histogram.h" 17#include "base/metrics/stats_counters.h" 18#include "base/stl_util.h" 19#include "base/strings/string_number_conversions.h" 20#include "base/strings/string_util.h" 21#include "base/strings/stringprintf.h" 22#include "base/values.h" 23#include "build/build_config.h" 24#include "net/base/auth.h" 25#include "net/base/host_port_pair.h" 26#include "net/base/io_buffer.h" 27#include "net/base/load_flags.h" 28#include "net/base/load_timing_info.h" 29#include "net/base/net_errors.h" 30#include "net/base/net_util.h" 31#include "net/base/upload_data_stream.h" 32#include "net/http/http_auth.h" 33#include "net/http/http_auth_handler.h" 34#include "net/http/http_auth_handler_factory.h" 35#include "net/http/http_basic_stream.h" 36#include "net/http/http_chunked_decoder.h" 37#include "net/http/http_network_session.h" 38#include "net/http/http_proxy_client_socket.h" 39#include "net/http/http_proxy_client_socket_pool.h" 40#include "net/http/http_request_headers.h" 41#include "net/http/http_request_info.h" 42#include "net/http/http_response_headers.h" 43#include "net/http/http_response_info.h" 44#include "net/http/http_server_properties.h" 45#include "net/http/http_status_code.h" 46#include "net/http/http_stream_base.h" 47#include "net/http/http_stream_factory.h" 48#include "net/http/http_util.h" 49#include "net/http/transport_security_state.h" 50#include "net/http/url_security_manager.h" 51#include "net/socket/client_socket_factory.h" 52#include "net/socket/socks_client_socket_pool.h" 53#include "net/socket/ssl_client_socket.h" 54#include "net/socket/ssl_client_socket_pool.h" 55#include "net/socket/transport_client_socket_pool.h" 56#include "net/spdy/spdy_http_stream.h" 57#include "net/spdy/spdy_session.h" 58#include "net/spdy/spdy_session_pool.h" 59#include "net/ssl/ssl_cert_request_info.h" 60#include "net/ssl/ssl_connection_status_flags.h" 61#include "url/gurl.h" 62 63using base::Time; 64 65namespace net { 66 67namespace { 68 69void ProcessAlternateProtocol(HttpStreamFactory* factory, 70 HttpServerProperties* http_server_properties, 71 const HttpResponseHeaders& headers, 72 const HostPortPair& http_host_port_pair) { 73 std::string alternate_protocol_str; 74 75 if (!headers.EnumerateHeader(NULL, kAlternateProtocolHeader, 76 &alternate_protocol_str)) { 77 // Header is not present. 78 return; 79 } 80 81 factory->ProcessAlternateProtocol(http_server_properties, 82 alternate_protocol_str, 83 http_host_port_pair); 84} 85 86// Returns true if |error| is a client certificate authentication error. 87bool IsClientCertificateError(int error) { 88 switch (error) { 89 case ERR_BAD_SSL_CLIENT_AUTH_CERT: 90 case ERR_SSL_CLIENT_AUTH_PRIVATE_KEY_ACCESS_DENIED: 91 case ERR_SSL_CLIENT_AUTH_CERT_NO_PRIVATE_KEY: 92 case ERR_SSL_CLIENT_AUTH_SIGNATURE_FAILED: 93 return true; 94 default: 95 return false; 96 } 97} 98 99base::Value* NetLogSSLVersionFallbackCallback( 100 const GURL* url, 101 int net_error, 102 uint16 version_before, 103 uint16 version_after, 104 NetLog::LogLevel /* log_level */) { 105 base::DictionaryValue* dict = new base::DictionaryValue(); 106 dict->SetString("host_and_port", GetHostAndPort(*url)); 107 dict->SetInteger("net_error", net_error); 108 dict->SetInteger("version_before", version_before); 109 dict->SetInteger("version_after", version_after); 110 return dict; 111} 112 113} // namespace 114 115//----------------------------------------------------------------------------- 116 117HttpNetworkTransaction::HttpNetworkTransaction(RequestPriority priority, 118 HttpNetworkSession* session) 119 : pending_auth_target_(HttpAuth::AUTH_NONE), 120 io_callback_(base::Bind(&HttpNetworkTransaction::OnIOComplete, 121 base::Unretained(this))), 122 session_(session), 123 request_(NULL), 124 priority_(priority), 125 headers_valid_(false), 126 logged_response_time_(false), 127 request_headers_(), 128 read_buf_len_(0), 129 next_state_(STATE_NONE), 130 establishing_tunnel_(false) { 131 session->ssl_config_service()->GetSSLConfig(&server_ssl_config_); 132 if (session->http_stream_factory()->has_next_protos()) { 133 server_ssl_config_.next_protos = 134 session->http_stream_factory()->next_protos(); 135 } 136 proxy_ssl_config_ = server_ssl_config_; 137} 138 139HttpNetworkTransaction::~HttpNetworkTransaction() { 140 if (stream_.get()) { 141 HttpResponseHeaders* headers = GetResponseHeaders(); 142 // TODO(mbelshe): The stream_ should be able to compute whether or not the 143 // stream should be kept alive. No reason to compute here 144 // and pass it in. 145 bool try_to_keep_alive = 146 next_state_ == STATE_NONE && 147 stream_->CanFindEndOfResponse() && 148 (!headers || headers->IsKeepAlive()); 149 if (!try_to_keep_alive) { 150 stream_->Close(true /* not reusable */); 151 } else { 152 if (stream_->IsResponseBodyComplete()) { 153 // If the response body is complete, we can just reuse the socket. 154 stream_->Close(false /* reusable */); 155 } else if (stream_->IsSpdyHttpStream()) { 156 // Doesn't really matter for SpdyHttpStream. Just close it. 157 stream_->Close(true /* not reusable */); 158 } else { 159 // Otherwise, we try to drain the response body. 160 HttpStreamBase* stream = stream_.release(); 161 stream->Drain(session_.get()); 162 } 163 } 164 } 165} 166 167int HttpNetworkTransaction::Start(const HttpRequestInfo* request_info, 168 const CompletionCallback& callback, 169 const BoundNetLog& net_log) { 170 SIMPLE_STATS_COUNTER("HttpNetworkTransaction.Count"); 171 172 net_log_ = net_log; 173 request_ = request_info; 174 start_time_ = base::Time::Now(); 175 176 if (request_->load_flags & LOAD_DISABLE_CERT_REVOCATION_CHECKING) { 177 server_ssl_config_.rev_checking_enabled = false; 178 proxy_ssl_config_.rev_checking_enabled = false; 179 } 180 181 // Channel ID is enabled unless --disable-tls-channel-id flag is set, 182 // or if privacy mode is enabled. 183 bool channel_id_enabled = server_ssl_config_.channel_id_enabled && 184 (request_->privacy_mode == kPrivacyModeDisabled); 185 server_ssl_config_.channel_id_enabled = channel_id_enabled; 186 187 next_state_ = STATE_CREATE_STREAM; 188 int rv = DoLoop(OK); 189 if (rv == ERR_IO_PENDING) 190 callback_ = callback; 191 return rv; 192} 193 194int HttpNetworkTransaction::RestartIgnoringLastError( 195 const CompletionCallback& callback) { 196 DCHECK(!stream_.get()); 197 DCHECK(!stream_request_.get()); 198 DCHECK_EQ(STATE_NONE, next_state_); 199 200 next_state_ = STATE_CREATE_STREAM; 201 202 int rv = DoLoop(OK); 203 if (rv == ERR_IO_PENDING) 204 callback_ = callback; 205 return rv; 206} 207 208int HttpNetworkTransaction::RestartWithCertificate( 209 X509Certificate* client_cert, const CompletionCallback& callback) { 210 // In HandleCertificateRequest(), we always tear down existing stream 211 // requests to force a new connection. So we shouldn't have one here. 212 DCHECK(!stream_request_.get()); 213 DCHECK(!stream_.get()); 214 DCHECK_EQ(STATE_NONE, next_state_); 215 216 SSLConfig* ssl_config = response_.cert_request_info->is_proxy ? 217 &proxy_ssl_config_ : &server_ssl_config_; 218 ssl_config->send_client_cert = true; 219 ssl_config->client_cert = client_cert; 220 session_->ssl_client_auth_cache()->Add( 221 response_.cert_request_info->host_and_port, client_cert); 222 // Reset the other member variables. 223 // Note: this is necessary only with SSL renegotiation. 224 ResetStateForRestart(); 225 next_state_ = STATE_CREATE_STREAM; 226 int rv = DoLoop(OK); 227 if (rv == ERR_IO_PENDING) 228 callback_ = callback; 229 return rv; 230} 231 232int HttpNetworkTransaction::RestartWithAuth( 233 const AuthCredentials& credentials, const CompletionCallback& callback) { 234 HttpAuth::Target target = pending_auth_target_; 235 if (target == HttpAuth::AUTH_NONE) { 236 NOTREACHED(); 237 return ERR_UNEXPECTED; 238 } 239 pending_auth_target_ = HttpAuth::AUTH_NONE; 240 241 auth_controllers_[target]->ResetAuth(credentials); 242 243 DCHECK(callback_.is_null()); 244 245 int rv = OK; 246 if (target == HttpAuth::AUTH_PROXY && establishing_tunnel_) { 247 // In this case, we've gathered credentials for use with proxy 248 // authentication of a tunnel. 249 DCHECK_EQ(STATE_CREATE_STREAM_COMPLETE, next_state_); 250 DCHECK(stream_request_ != NULL); 251 auth_controllers_[target] = NULL; 252 ResetStateForRestart(); 253 rv = stream_request_->RestartTunnelWithProxyAuth(credentials); 254 } else { 255 // In this case, we've gathered credentials for the server or the proxy 256 // but it is not during the tunneling phase. 257 DCHECK(stream_request_ == NULL); 258 PrepareForAuthRestart(target); 259 rv = DoLoop(OK); 260 } 261 262 if (rv == ERR_IO_PENDING) 263 callback_ = callback; 264 return rv; 265} 266 267void HttpNetworkTransaction::PrepareForAuthRestart(HttpAuth::Target target) { 268 DCHECK(HaveAuth(target)); 269 DCHECK(!stream_request_.get()); 270 271 bool keep_alive = false; 272 // Even if the server says the connection is keep-alive, we have to be 273 // able to find the end of each response in order to reuse the connection. 274 if (GetResponseHeaders()->IsKeepAlive() && 275 stream_->CanFindEndOfResponse()) { 276 // If the response body hasn't been completely read, we need to drain 277 // it first. 278 if (!stream_->IsResponseBodyComplete()) { 279 next_state_ = STATE_DRAIN_BODY_FOR_AUTH_RESTART; 280 read_buf_ = new IOBuffer(kDrainBodyBufferSize); // A bit bucket. 281 read_buf_len_ = kDrainBodyBufferSize; 282 return; 283 } 284 keep_alive = true; 285 } 286 287 // We don't need to drain the response body, so we act as if we had drained 288 // the response body. 289 DidDrainBodyForAuthRestart(keep_alive); 290} 291 292void HttpNetworkTransaction::DidDrainBodyForAuthRestart(bool keep_alive) { 293 DCHECK(!stream_request_.get()); 294 295 if (stream_.get()) { 296 HttpStream* new_stream = NULL; 297 if (keep_alive && stream_->IsConnectionReusable()) { 298 // We should call connection_->set_idle_time(), but this doesn't occur 299 // often enough to be worth the trouble. 300 stream_->SetConnectionReused(); 301 new_stream = 302 static_cast<HttpStream*>(stream_.get())->RenewStreamForAuth(); 303 } 304 305 if (!new_stream) { 306 // Close the stream and mark it as not_reusable. Even in the 307 // keep_alive case, we've determined that the stream_ is not 308 // reusable if new_stream is NULL. 309 stream_->Close(true); 310 next_state_ = STATE_CREATE_STREAM; 311 } else { 312 next_state_ = STATE_INIT_STREAM; 313 } 314 stream_.reset(new_stream); 315 } 316 317 // Reset the other member variables. 318 ResetStateForAuthRestart(); 319} 320 321bool HttpNetworkTransaction::IsReadyToRestartForAuth() { 322 return pending_auth_target_ != HttpAuth::AUTH_NONE && 323 HaveAuth(pending_auth_target_); 324} 325 326int HttpNetworkTransaction::Read(IOBuffer* buf, int buf_len, 327 const CompletionCallback& callback) { 328 DCHECK(buf); 329 DCHECK_LT(0, buf_len); 330 331 State next_state = STATE_NONE; 332 333 scoped_refptr<HttpResponseHeaders> headers(GetResponseHeaders()); 334 if (headers_valid_ && headers.get() && stream_request_.get()) { 335 // We're trying to read the body of the response but we're still trying 336 // to establish an SSL tunnel through an HTTP proxy. We can't read these 337 // bytes when establishing a tunnel because they might be controlled by 338 // an active network attacker. We don't worry about this for HTTP 339 // because an active network attacker can already control HTTP sessions. 340 // We reach this case when the user cancels a 407 proxy auth prompt. We 341 // also don't worry about this for an HTTPS Proxy, because the 342 // communication with the proxy is secure. 343 // See http://crbug.com/8473. 344 DCHECK(proxy_info_.is_http() || proxy_info_.is_https()); 345 DCHECK_EQ(headers->response_code(), HTTP_PROXY_AUTHENTICATION_REQUIRED); 346 LOG(WARNING) << "Blocked proxy response with status " 347 << headers->response_code() << " to CONNECT request for " 348 << GetHostAndPort(request_->url) << "."; 349 return ERR_TUNNEL_CONNECTION_FAILED; 350 } 351 352 // Are we using SPDY or HTTP? 353 next_state = STATE_READ_BODY; 354 355 read_buf_ = buf; 356 read_buf_len_ = buf_len; 357 358 next_state_ = next_state; 359 int rv = DoLoop(OK); 360 if (rv == ERR_IO_PENDING) 361 callback_ = callback; 362 return rv; 363} 364 365bool HttpNetworkTransaction::GetFullRequestHeaders( 366 HttpRequestHeaders* headers) const { 367 // TODO(ttuttle): Make sure we've populated request_headers_. 368 *headers = request_headers_; 369 return true; 370} 371 372const HttpResponseInfo* HttpNetworkTransaction::GetResponseInfo() const { 373 return ((headers_valid_ && response_.headers.get()) || 374 response_.ssl_info.cert.get() || response_.cert_request_info.get()) 375 ? &response_ 376 : NULL; 377} 378 379LoadState HttpNetworkTransaction::GetLoadState() const { 380 // TODO(wtc): Define a new LoadState value for the 381 // STATE_INIT_CONNECTION_COMPLETE state, which delays the HTTP request. 382 switch (next_state_) { 383 case STATE_CREATE_STREAM_COMPLETE: 384 return stream_request_->GetLoadState(); 385 case STATE_GENERATE_PROXY_AUTH_TOKEN_COMPLETE: 386 case STATE_GENERATE_SERVER_AUTH_TOKEN_COMPLETE: 387 case STATE_SEND_REQUEST_COMPLETE: 388 return LOAD_STATE_SENDING_REQUEST; 389 case STATE_READ_HEADERS_COMPLETE: 390 return LOAD_STATE_WAITING_FOR_RESPONSE; 391 case STATE_READ_BODY_COMPLETE: 392 return LOAD_STATE_READING_RESPONSE; 393 default: 394 return LOAD_STATE_IDLE; 395 } 396} 397 398UploadProgress HttpNetworkTransaction::GetUploadProgress() const { 399 if (!stream_.get()) 400 return UploadProgress(); 401 402 // TODO(bashi): This cast is temporary. Remove later. 403 return static_cast<HttpStream*>(stream_.get())->GetUploadProgress(); 404} 405 406bool HttpNetworkTransaction::GetLoadTimingInfo( 407 LoadTimingInfo* load_timing_info) const { 408 if (!stream_ || !stream_->GetLoadTimingInfo(load_timing_info)) 409 return false; 410 411 load_timing_info->proxy_resolve_start = 412 proxy_info_.proxy_resolve_start_time(); 413 load_timing_info->proxy_resolve_end = proxy_info_.proxy_resolve_end_time(); 414 load_timing_info->send_start = send_start_time_; 415 load_timing_info->send_end = send_end_time_; 416 return true; 417} 418 419void HttpNetworkTransaction::SetPriority(RequestPriority priority) { 420 priority_ = priority; 421 // TODO(akalin): Plumb this through to |stream_request_| and 422 // |stream_|. 423} 424 425void HttpNetworkTransaction::OnStreamReady(const SSLConfig& used_ssl_config, 426 const ProxyInfo& used_proxy_info, 427 HttpStreamBase* stream) { 428 DCHECK_EQ(STATE_CREATE_STREAM_COMPLETE, next_state_); 429 DCHECK(stream_request_.get()); 430 431 stream_.reset(stream); 432 server_ssl_config_ = used_ssl_config; 433 proxy_info_ = used_proxy_info; 434 response_.was_npn_negotiated = stream_request_->was_npn_negotiated(); 435 response_.npn_negotiated_protocol = SSLClientSocket::NextProtoToString( 436 stream_request_->protocol_negotiated()); 437 response_.was_fetched_via_spdy = stream_request_->using_spdy(); 438 response_.was_fetched_via_proxy = !proxy_info_.is_direct(); 439 440 OnIOComplete(OK); 441} 442 443void HttpNetworkTransaction::OnWebSocketStreamReady( 444 const SSLConfig& used_ssl_config, 445 const ProxyInfo& used_proxy_info, 446 WebSocketStreamBase* stream) { 447 NOTREACHED() << "This function should never be called."; 448} 449 450void HttpNetworkTransaction::OnStreamFailed(int result, 451 const SSLConfig& used_ssl_config) { 452 DCHECK_EQ(STATE_CREATE_STREAM_COMPLETE, next_state_); 453 DCHECK_NE(OK, result); 454 DCHECK(stream_request_.get()); 455 DCHECK(!stream_.get()); 456 server_ssl_config_ = used_ssl_config; 457 458 OnIOComplete(result); 459} 460 461void HttpNetworkTransaction::OnCertificateError( 462 int result, 463 const SSLConfig& used_ssl_config, 464 const SSLInfo& ssl_info) { 465 DCHECK_EQ(STATE_CREATE_STREAM_COMPLETE, next_state_); 466 DCHECK_NE(OK, result); 467 DCHECK(stream_request_.get()); 468 DCHECK(!stream_.get()); 469 470 response_.ssl_info = ssl_info; 471 server_ssl_config_ = used_ssl_config; 472 473 // TODO(mbelshe): For now, we're going to pass the error through, and that 474 // will close the stream_request in all cases. This means that we're always 475 // going to restart an entire STATE_CREATE_STREAM, even if the connection is 476 // good and the user chooses to ignore the error. This is not ideal, but not 477 // the end of the world either. 478 479 OnIOComplete(result); 480} 481 482void HttpNetworkTransaction::OnNeedsProxyAuth( 483 const HttpResponseInfo& proxy_response, 484 const SSLConfig& used_ssl_config, 485 const ProxyInfo& used_proxy_info, 486 HttpAuthController* auth_controller) { 487 DCHECK(stream_request_.get()); 488 DCHECK_EQ(STATE_CREATE_STREAM_COMPLETE, next_state_); 489 490 establishing_tunnel_ = true; 491 response_.headers = proxy_response.headers; 492 response_.auth_challenge = proxy_response.auth_challenge; 493 headers_valid_ = true; 494 server_ssl_config_ = used_ssl_config; 495 proxy_info_ = used_proxy_info; 496 497 auth_controllers_[HttpAuth::AUTH_PROXY] = auth_controller; 498 pending_auth_target_ = HttpAuth::AUTH_PROXY; 499 500 DoCallback(OK); 501} 502 503void HttpNetworkTransaction::OnNeedsClientAuth( 504 const SSLConfig& used_ssl_config, 505 SSLCertRequestInfo* cert_info) { 506 DCHECK_EQ(STATE_CREATE_STREAM_COMPLETE, next_state_); 507 508 server_ssl_config_ = used_ssl_config; 509 response_.cert_request_info = cert_info; 510 OnIOComplete(ERR_SSL_CLIENT_AUTH_CERT_NEEDED); 511} 512 513void HttpNetworkTransaction::OnHttpsProxyTunnelResponse( 514 const HttpResponseInfo& response_info, 515 const SSLConfig& used_ssl_config, 516 const ProxyInfo& used_proxy_info, 517 HttpStreamBase* stream) { 518 DCHECK_EQ(STATE_CREATE_STREAM_COMPLETE, next_state_); 519 520 headers_valid_ = true; 521 response_ = response_info; 522 server_ssl_config_ = used_ssl_config; 523 proxy_info_ = used_proxy_info; 524 stream_.reset(stream); 525 stream_request_.reset(); // we're done with the stream request 526 OnIOComplete(ERR_HTTPS_PROXY_TUNNEL_RESPONSE); 527} 528 529bool HttpNetworkTransaction::is_https_request() const { 530 return request_->url.SchemeIs("https"); 531} 532 533void HttpNetworkTransaction::DoCallback(int rv) { 534 DCHECK_NE(rv, ERR_IO_PENDING); 535 DCHECK(!callback_.is_null()); 536 537 // Since Run may result in Read being called, clear user_callback_ up front. 538 CompletionCallback c = callback_; 539 callback_.Reset(); 540 c.Run(rv); 541} 542 543void HttpNetworkTransaction::OnIOComplete(int result) { 544 int rv = DoLoop(result); 545 if (rv != ERR_IO_PENDING) 546 DoCallback(rv); 547} 548 549int HttpNetworkTransaction::DoLoop(int result) { 550 DCHECK(next_state_ != STATE_NONE); 551 552 int rv = result; 553 do { 554 State state = next_state_; 555 next_state_ = STATE_NONE; 556 switch (state) { 557 case STATE_CREATE_STREAM: 558 DCHECK_EQ(OK, rv); 559 rv = DoCreateStream(); 560 break; 561 case STATE_CREATE_STREAM_COMPLETE: 562 rv = DoCreateStreamComplete(rv); 563 break; 564 case STATE_INIT_STREAM: 565 DCHECK_EQ(OK, rv); 566 rv = DoInitStream(); 567 break; 568 case STATE_INIT_STREAM_COMPLETE: 569 rv = DoInitStreamComplete(rv); 570 break; 571 case STATE_GENERATE_PROXY_AUTH_TOKEN: 572 DCHECK_EQ(OK, rv); 573 rv = DoGenerateProxyAuthToken(); 574 break; 575 case STATE_GENERATE_PROXY_AUTH_TOKEN_COMPLETE: 576 rv = DoGenerateProxyAuthTokenComplete(rv); 577 break; 578 case STATE_GENERATE_SERVER_AUTH_TOKEN: 579 DCHECK_EQ(OK, rv); 580 rv = DoGenerateServerAuthToken(); 581 break; 582 case STATE_GENERATE_SERVER_AUTH_TOKEN_COMPLETE: 583 rv = DoGenerateServerAuthTokenComplete(rv); 584 break; 585 case STATE_INIT_REQUEST_BODY: 586 DCHECK_EQ(OK, rv); 587 rv = DoInitRequestBody(); 588 break; 589 case STATE_INIT_REQUEST_BODY_COMPLETE: 590 rv = DoInitRequestBodyComplete(rv); 591 break; 592 case STATE_BUILD_REQUEST: 593 DCHECK_EQ(OK, rv); 594 net_log_.BeginEvent(NetLog::TYPE_HTTP_TRANSACTION_SEND_REQUEST); 595 rv = DoBuildRequest(); 596 break; 597 case STATE_BUILD_REQUEST_COMPLETE: 598 rv = DoBuildRequestComplete(rv); 599 break; 600 case STATE_SEND_REQUEST: 601 DCHECK_EQ(OK, rv); 602 rv = DoSendRequest(); 603 break; 604 case STATE_SEND_REQUEST_COMPLETE: 605 rv = DoSendRequestComplete(rv); 606 net_log_.EndEventWithNetErrorCode( 607 NetLog::TYPE_HTTP_TRANSACTION_SEND_REQUEST, rv); 608 break; 609 case STATE_READ_HEADERS: 610 DCHECK_EQ(OK, rv); 611 net_log_.BeginEvent(NetLog::TYPE_HTTP_TRANSACTION_READ_HEADERS); 612 rv = DoReadHeaders(); 613 break; 614 case STATE_READ_HEADERS_COMPLETE: 615 rv = DoReadHeadersComplete(rv); 616 net_log_.EndEventWithNetErrorCode( 617 NetLog::TYPE_HTTP_TRANSACTION_READ_HEADERS, rv); 618 break; 619 case STATE_READ_BODY: 620 DCHECK_EQ(OK, rv); 621 net_log_.BeginEvent(NetLog::TYPE_HTTP_TRANSACTION_READ_BODY); 622 rv = DoReadBody(); 623 break; 624 case STATE_READ_BODY_COMPLETE: 625 rv = DoReadBodyComplete(rv); 626 net_log_.EndEventWithNetErrorCode( 627 NetLog::TYPE_HTTP_TRANSACTION_READ_BODY, rv); 628 break; 629 case STATE_DRAIN_BODY_FOR_AUTH_RESTART: 630 DCHECK_EQ(OK, rv); 631 net_log_.BeginEvent( 632 NetLog::TYPE_HTTP_TRANSACTION_DRAIN_BODY_FOR_AUTH_RESTART); 633 rv = DoDrainBodyForAuthRestart(); 634 break; 635 case STATE_DRAIN_BODY_FOR_AUTH_RESTART_COMPLETE: 636 rv = DoDrainBodyForAuthRestartComplete(rv); 637 net_log_.EndEventWithNetErrorCode( 638 NetLog::TYPE_HTTP_TRANSACTION_DRAIN_BODY_FOR_AUTH_RESTART, rv); 639 break; 640 default: 641 NOTREACHED() << "bad state"; 642 rv = ERR_FAILED; 643 break; 644 } 645 } while (rv != ERR_IO_PENDING && next_state_ != STATE_NONE); 646 647 return rv; 648} 649 650int HttpNetworkTransaction::DoCreateStream() { 651 next_state_ = STATE_CREATE_STREAM_COMPLETE; 652 653 stream_request_.reset( 654 session_->http_stream_factory()->RequestStream( 655 *request_, 656 priority_, 657 server_ssl_config_, 658 proxy_ssl_config_, 659 this, 660 net_log_)); 661 DCHECK(stream_request_.get()); 662 return ERR_IO_PENDING; 663} 664 665int HttpNetworkTransaction::DoCreateStreamComplete(int result) { 666 if (result == OK) { 667 next_state_ = STATE_INIT_STREAM; 668 DCHECK(stream_.get()); 669 } else if (result == ERR_SSL_CLIENT_AUTH_CERT_NEEDED) { 670 result = HandleCertificateRequest(result); 671 } else if (result == ERR_HTTPS_PROXY_TUNNEL_RESPONSE) { 672 // Return OK and let the caller read the proxy's error page 673 next_state_ = STATE_NONE; 674 return OK; 675 } 676 677 // Handle possible handshake errors that may have occurred if the stream 678 // used SSL for one or more of the layers. 679 result = HandleSSLHandshakeError(result); 680 681 // At this point we are done with the stream_request_. 682 stream_request_.reset(); 683 return result; 684} 685 686int HttpNetworkTransaction::DoInitStream() { 687 DCHECK(stream_.get()); 688 next_state_ = STATE_INIT_STREAM_COMPLETE; 689 return stream_->InitializeStream(request_, priority_, net_log_, io_callback_); 690} 691 692int HttpNetworkTransaction::DoInitStreamComplete(int result) { 693 if (result == OK) { 694 next_state_ = STATE_GENERATE_PROXY_AUTH_TOKEN; 695 } else { 696 if (result < 0) 697 result = HandleIOError(result); 698 699 // The stream initialization failed, so this stream will never be useful. 700 stream_.reset(); 701 } 702 703 return result; 704} 705 706int HttpNetworkTransaction::DoGenerateProxyAuthToken() { 707 next_state_ = STATE_GENERATE_PROXY_AUTH_TOKEN_COMPLETE; 708 if (!ShouldApplyProxyAuth()) 709 return OK; 710 HttpAuth::Target target = HttpAuth::AUTH_PROXY; 711 if (!auth_controllers_[target].get()) 712 auth_controllers_[target] = 713 new HttpAuthController(target, 714 AuthURL(target), 715 session_->http_auth_cache(), 716 session_->http_auth_handler_factory()); 717 return auth_controllers_[target]->MaybeGenerateAuthToken(request_, 718 io_callback_, 719 net_log_); 720} 721 722int HttpNetworkTransaction::DoGenerateProxyAuthTokenComplete(int rv) { 723 DCHECK_NE(ERR_IO_PENDING, rv); 724 if (rv == OK) 725 next_state_ = STATE_GENERATE_SERVER_AUTH_TOKEN; 726 return rv; 727} 728 729int HttpNetworkTransaction::DoGenerateServerAuthToken() { 730 next_state_ = STATE_GENERATE_SERVER_AUTH_TOKEN_COMPLETE; 731 HttpAuth::Target target = HttpAuth::AUTH_SERVER; 732 if (!auth_controllers_[target].get()) 733 auth_controllers_[target] = 734 new HttpAuthController(target, 735 AuthURL(target), 736 session_->http_auth_cache(), 737 session_->http_auth_handler_factory()); 738 if (!ShouldApplyServerAuth()) 739 return OK; 740 return auth_controllers_[target]->MaybeGenerateAuthToken(request_, 741 io_callback_, 742 net_log_); 743} 744 745int HttpNetworkTransaction::DoGenerateServerAuthTokenComplete(int rv) { 746 DCHECK_NE(ERR_IO_PENDING, rv); 747 if (rv == OK) 748 next_state_ = STATE_INIT_REQUEST_BODY; 749 return rv; 750} 751 752void HttpNetworkTransaction::BuildRequestHeaders(bool using_proxy) { 753 request_headers_.SetHeader(HttpRequestHeaders::kHost, 754 GetHostAndOptionalPort(request_->url)); 755 756 // For compat with HTTP/1.0 servers and proxies: 757 if (using_proxy) { 758 request_headers_.SetHeader(HttpRequestHeaders::kProxyConnection, 759 "keep-alive"); 760 } else { 761 request_headers_.SetHeader(HttpRequestHeaders::kConnection, "keep-alive"); 762 } 763 764 // Add a content length header? 765 if (request_->upload_data_stream) { 766 if (request_->upload_data_stream->is_chunked()) { 767 request_headers_.SetHeader( 768 HttpRequestHeaders::kTransferEncoding, "chunked"); 769 } else { 770 request_headers_.SetHeader( 771 HttpRequestHeaders::kContentLength, 772 base::Uint64ToString(request_->upload_data_stream->size())); 773 } 774 } else if (request_->method == "POST" || request_->method == "PUT" || 775 request_->method == "HEAD") { 776 // An empty POST/PUT request still needs a content length. As for HEAD, 777 // IE and Safari also add a content length header. Presumably it is to 778 // support sending a HEAD request to an URL that only expects to be sent a 779 // POST or some other method that normally would have a message body. 780 request_headers_.SetHeader(HttpRequestHeaders::kContentLength, "0"); 781 } 782 783 // Honor load flags that impact proxy caches. 784 if (request_->load_flags & LOAD_BYPASS_CACHE) { 785 request_headers_.SetHeader(HttpRequestHeaders::kPragma, "no-cache"); 786 request_headers_.SetHeader(HttpRequestHeaders::kCacheControl, "no-cache"); 787 } else if (request_->load_flags & LOAD_VALIDATE_CACHE) { 788 request_headers_.SetHeader(HttpRequestHeaders::kCacheControl, "max-age=0"); 789 } 790 791 if (ShouldApplyProxyAuth() && HaveAuth(HttpAuth::AUTH_PROXY)) 792 auth_controllers_[HttpAuth::AUTH_PROXY]->AddAuthorizationHeader( 793 &request_headers_); 794 if (ShouldApplyServerAuth() && HaveAuth(HttpAuth::AUTH_SERVER)) 795 auth_controllers_[HttpAuth::AUTH_SERVER]->AddAuthorizationHeader( 796 &request_headers_); 797 798 request_headers_.MergeFrom(request_->extra_headers); 799 response_.did_use_http_auth = 800 request_headers_.HasHeader(HttpRequestHeaders::kAuthorization) || 801 request_headers_.HasHeader(HttpRequestHeaders::kProxyAuthorization); 802} 803 804int HttpNetworkTransaction::DoInitRequestBody() { 805 next_state_ = STATE_INIT_REQUEST_BODY_COMPLETE; 806 int rv = OK; 807 if (request_->upload_data_stream) 808 rv = request_->upload_data_stream->Init(io_callback_); 809 return rv; 810} 811 812int HttpNetworkTransaction::DoInitRequestBodyComplete(int result) { 813 if (result == OK) 814 next_state_ = STATE_BUILD_REQUEST; 815 return result; 816} 817 818int HttpNetworkTransaction::DoBuildRequest() { 819 next_state_ = STATE_BUILD_REQUEST_COMPLETE; 820 headers_valid_ = false; 821 822 // This is constructed lazily (instead of within our Start method), so that 823 // we have proxy info available. 824 if (request_headers_.IsEmpty()) { 825 bool using_proxy = (proxy_info_.is_http() || proxy_info_.is_https()) && 826 !is_https_request(); 827 BuildRequestHeaders(using_proxy); 828 } 829 830 return OK; 831} 832 833int HttpNetworkTransaction::DoBuildRequestComplete(int result) { 834 if (result == OK) 835 next_state_ = STATE_SEND_REQUEST; 836 return result; 837} 838 839int HttpNetworkTransaction::DoSendRequest() { 840 send_start_time_ = base::TimeTicks::Now(); 841 next_state_ = STATE_SEND_REQUEST_COMPLETE; 842 843 return stream_->SendRequest(request_headers_, &response_, io_callback_); 844} 845 846int HttpNetworkTransaction::DoSendRequestComplete(int result) { 847 send_end_time_ = base::TimeTicks::Now(); 848 if (result < 0) 849 return HandleIOError(result); 850 response_.network_accessed = true; 851 next_state_ = STATE_READ_HEADERS; 852 return OK; 853} 854 855int HttpNetworkTransaction::DoReadHeaders() { 856 next_state_ = STATE_READ_HEADERS_COMPLETE; 857 return stream_->ReadResponseHeaders(io_callback_); 858} 859 860int HttpNetworkTransaction::HandleConnectionClosedBeforeEndOfHeaders() { 861 if (!response_.headers.get() && !stream_->IsConnectionReused()) { 862 // The connection was closed before any data was sent. Likely an error 863 // rather than empty HTTP/0.9 response. 864 return ERR_EMPTY_RESPONSE; 865 } 866 867 return OK; 868} 869 870int HttpNetworkTransaction::DoReadHeadersComplete(int result) { 871 // We can get a certificate error or ERR_SSL_CLIENT_AUTH_CERT_NEEDED here 872 // due to SSL renegotiation. 873 if (IsCertificateError(result)) { 874 // We don't handle a certificate error during SSL renegotiation, so we 875 // have to return an error that's not in the certificate error range 876 // (-2xx). 877 LOG(ERROR) << "Got a server certificate with error " << result 878 << " during SSL renegotiation"; 879 result = ERR_CERT_ERROR_IN_SSL_RENEGOTIATION; 880 } else if (result == ERR_SSL_CLIENT_AUTH_CERT_NEEDED) { 881 // TODO(wtc): Need a test case for this code path! 882 DCHECK(stream_.get()); 883 DCHECK(is_https_request()); 884 response_.cert_request_info = new SSLCertRequestInfo; 885 stream_->GetSSLCertRequestInfo(response_.cert_request_info.get()); 886 result = HandleCertificateRequest(result); 887 if (result == OK) 888 return result; 889 } 890 891 if (result < 0 && result != ERR_CONNECTION_CLOSED) 892 return HandleIOError(result); 893 894 if (result == ERR_CONNECTION_CLOSED && ShouldResendRequest(result)) { 895 ResetConnectionAndRequestForResend(); 896 return OK; 897 } 898 899 // After we call RestartWithAuth a new response_time will be recorded, and 900 // we need to be cautious about incorrectly logging the duration across the 901 // authentication activity. 902 if (result == OK) 903 LogTransactionConnectedMetrics(); 904 905 if (result == ERR_CONNECTION_CLOSED) { 906 // For now, if we get at least some data, we do the best we can to make 907 // sense of it and send it back up the stack. 908 int rv = HandleConnectionClosedBeforeEndOfHeaders(); 909 if (rv != OK) 910 return rv; 911 } 912 DCHECK(response_.headers.get()); 913 914 // Server-induced fallback is supported only if this is a PAC configured 915 // proxy. See: http://crbug.com/143712 916 if (response_.was_fetched_via_proxy && proxy_info_.did_use_pac_script() && 917 response_.headers.get() != NULL) { 918 bool should_fallback = 919 response_.headers->HasHeaderValue("connection", "proxy-bypass"); 920 // Additionally, fallback if a 500 is returned via the data reduction proxy. 921 // This is conservative, as the 500 might have been generated by the origin, 922 // and not the proxy. 923#if defined(SPDY_PROXY_AUTH_ORIGIN) 924 if (!should_fallback) { 925 should_fallback = 926 response_.headers->response_code() == HTTP_INTERNAL_SERVER_ERROR && 927 proxy_info_.proxy_server().host_port_pair().Equals( 928 HostPortPair::FromURL(GURL(SPDY_PROXY_AUTH_ORIGIN))); 929 } 930#endif 931 if (should_fallback) { 932 ProxyService* proxy_service = session_->proxy_service(); 933 if (proxy_service->MarkProxyAsBad(proxy_info_, net_log_)) { 934 // Only retry in the case of GETs. We don't want to resubmit a POST 935 // if the proxy took some action. 936 if (request_->method == "GET") { 937 ResetConnectionAndRequestForResend(); 938 return OK; 939 } 940 } 941 } 942 } 943 944 // Like Net.HttpResponseCode, but only for MAIN_FRAME loads. 945 if (request_->load_flags & LOAD_MAIN_FRAME) { 946 const int response_code = response_.headers->response_code(); 947 UMA_HISTOGRAM_ENUMERATION( 948 "Net.HttpResponseCode_Nxx_MainFrame", response_code/100, 10); 949 } 950 951 net_log_.AddEvent( 952 NetLog::TYPE_HTTP_TRANSACTION_READ_RESPONSE_HEADERS, 953 base::Bind(&HttpResponseHeaders::NetLogCallback, response_.headers)); 954 955 if (response_.headers->GetParsedHttpVersion() < HttpVersion(1, 0)) { 956 // HTTP/0.9 doesn't support the PUT method, so lack of response headers 957 // indicates a buggy server. See: 958 // https://bugzilla.mozilla.org/show_bug.cgi?id=193921 959 if (request_->method == "PUT") 960 return ERR_METHOD_NOT_SUPPORTED; 961 } 962 963 // Check for an intermediate 100 Continue response. An origin server is 964 // allowed to send this response even if we didn't ask for it, so we just 965 // need to skip over it. 966 // We treat any other 1xx in this same way (although in practice getting 967 // a 1xx that isn't a 100 is rare). 968 if (response_.headers->response_code() / 100 == 1) { 969 response_.headers = new HttpResponseHeaders(std::string()); 970 next_state_ = STATE_READ_HEADERS; 971 return OK; 972 } 973 974 HostPortPair endpoint = HostPortPair(request_->url.HostNoBrackets(), 975 request_->url.EffectiveIntPort()); 976 ProcessAlternateProtocol(session_->http_stream_factory(), 977 session_->http_server_properties(), 978 *response_.headers.get(), 979 endpoint); 980 981 int rv = HandleAuthChallenge(); 982 if (rv != OK) 983 return rv; 984 985 if (is_https_request()) 986 stream_->GetSSLInfo(&response_.ssl_info); 987 988 headers_valid_ = true; 989 return OK; 990} 991 992int HttpNetworkTransaction::DoReadBody() { 993 DCHECK(read_buf_.get()); 994 DCHECK_GT(read_buf_len_, 0); 995 DCHECK(stream_ != NULL); 996 997 next_state_ = STATE_READ_BODY_COMPLETE; 998 return stream_->ReadResponseBody( 999 read_buf_.get(), read_buf_len_, io_callback_); 1000} 1001 1002int HttpNetworkTransaction::DoReadBodyComplete(int result) { 1003 // We are done with the Read call. 1004 bool done = false; 1005 if (result <= 0) { 1006 DCHECK_NE(ERR_IO_PENDING, result); 1007 done = true; 1008 } 1009 1010 bool keep_alive = false; 1011 if (stream_->IsResponseBodyComplete()) { 1012 // Note: Just because IsResponseBodyComplete is true, we're not 1013 // necessarily "done". We're only "done" when it is the last 1014 // read on this HttpNetworkTransaction, which will be signified 1015 // by a zero-length read. 1016 // TODO(mbelshe): The keepalive property is really a property of 1017 // the stream. No need to compute it here just to pass back 1018 // to the stream's Close function. 1019 // TODO(rtenneti): CanFindEndOfResponse should return false if there are no 1020 // ResponseHeaders. 1021 if (stream_->CanFindEndOfResponse()) { 1022 HttpResponseHeaders* headers = GetResponseHeaders(); 1023 if (headers) 1024 keep_alive = headers->IsKeepAlive(); 1025 } 1026 } 1027 1028 // Clean up connection if we are done. 1029 if (done) { 1030 LogTransactionMetrics(); 1031 stream_->Close(!keep_alive); 1032 // Note: we don't reset the stream here. We've closed it, but we still 1033 // need it around so that callers can call methods such as 1034 // GetUploadProgress() and have them be meaningful. 1035 // TODO(mbelshe): This means we closed the stream here, and we close it 1036 // again in ~HttpNetworkTransaction. Clean that up. 1037 1038 // The next Read call will return 0 (EOF). 1039 } 1040 1041 // Clear these to avoid leaving around old state. 1042 read_buf_ = NULL; 1043 read_buf_len_ = 0; 1044 1045 return result; 1046} 1047 1048int HttpNetworkTransaction::DoDrainBodyForAuthRestart() { 1049 // This method differs from DoReadBody only in the next_state_. So we just 1050 // call DoReadBody and override the next_state_. Perhaps there is a more 1051 // elegant way for these two methods to share code. 1052 int rv = DoReadBody(); 1053 DCHECK(next_state_ == STATE_READ_BODY_COMPLETE); 1054 next_state_ = STATE_DRAIN_BODY_FOR_AUTH_RESTART_COMPLETE; 1055 return rv; 1056} 1057 1058// TODO(wtc): This method and the DoReadBodyComplete method are almost 1059// the same. Figure out a good way for these two methods to share code. 1060int HttpNetworkTransaction::DoDrainBodyForAuthRestartComplete(int result) { 1061 // keep_alive defaults to true because the very reason we're draining the 1062 // response body is to reuse the connection for auth restart. 1063 bool done = false, keep_alive = true; 1064 if (result < 0) { 1065 // Error or closed connection while reading the socket. 1066 done = true; 1067 keep_alive = false; 1068 } else if (stream_->IsResponseBodyComplete()) { 1069 done = true; 1070 } 1071 1072 if (done) { 1073 DidDrainBodyForAuthRestart(keep_alive); 1074 } else { 1075 // Keep draining. 1076 next_state_ = STATE_DRAIN_BODY_FOR_AUTH_RESTART; 1077 } 1078 1079 return OK; 1080} 1081 1082void HttpNetworkTransaction::LogTransactionConnectedMetrics() { 1083 if (logged_response_time_) 1084 return; 1085 1086 logged_response_time_ = true; 1087 1088 base::TimeDelta total_duration = response_.response_time - start_time_; 1089 1090 UMA_HISTOGRAM_CUSTOM_TIMES( 1091 "Net.Transaction_Connected", 1092 total_duration, 1093 base::TimeDelta::FromMilliseconds(1), base::TimeDelta::FromMinutes(10), 1094 100); 1095 1096 bool reused_socket = stream_->IsConnectionReused(); 1097 if (!reused_socket) { 1098 UMA_HISTOGRAM_CUSTOM_TIMES( 1099 "Net.Transaction_Connected_New_b", 1100 total_duration, 1101 base::TimeDelta::FromMilliseconds(1), base::TimeDelta::FromMinutes(10), 1102 100); 1103 } 1104 1105 // Currently, non-HIGHEST priority requests are frame or sub-frame resource 1106 // types. This will change when we also prioritize certain subresources like 1107 // css, js, etc. 1108 if (priority_ != HIGHEST) { 1109 UMA_HISTOGRAM_CUSTOM_TIMES( 1110 "Net.Priority_High_Latency_b", 1111 total_duration, 1112 base::TimeDelta::FromMilliseconds(1), base::TimeDelta::FromMinutes(10), 1113 100); 1114 } else { 1115 UMA_HISTOGRAM_CUSTOM_TIMES( 1116 "Net.Priority_Low_Latency_b", 1117 total_duration, 1118 base::TimeDelta::FromMilliseconds(1), base::TimeDelta::FromMinutes(10), 1119 100); 1120 } 1121} 1122 1123void HttpNetworkTransaction::LogTransactionMetrics() const { 1124 base::TimeDelta duration = base::Time::Now() - 1125 response_.request_time; 1126 if (60 < duration.InMinutes()) 1127 return; 1128 1129 base::TimeDelta total_duration = base::Time::Now() - start_time_; 1130 1131 UMA_HISTOGRAM_CUSTOM_TIMES("Net.Transaction_Latency_b", duration, 1132 base::TimeDelta::FromMilliseconds(1), 1133 base::TimeDelta::FromMinutes(10), 1134 100); 1135 UMA_HISTOGRAM_CUSTOM_TIMES("Net.Transaction_Latency_Total", 1136 total_duration, 1137 base::TimeDelta::FromMilliseconds(1), 1138 base::TimeDelta::FromMinutes(10), 100); 1139 1140 if (!stream_->IsConnectionReused()) { 1141 UMA_HISTOGRAM_CUSTOM_TIMES( 1142 "Net.Transaction_Latency_Total_New_Connection", 1143 total_duration, base::TimeDelta::FromMilliseconds(1), 1144 base::TimeDelta::FromMinutes(10), 100); 1145 } 1146} 1147 1148int HttpNetworkTransaction::HandleCertificateRequest(int error) { 1149 // There are two paths through which the server can request a certificate 1150 // from us. The first is during the initial handshake, the second is 1151 // during SSL renegotiation. 1152 // 1153 // In both cases, we want to close the connection before proceeding. 1154 // We do this for two reasons: 1155 // First, we don't want to keep the connection to the server hung for a 1156 // long time while the user selects a certificate. 1157 // Second, even if we did keep the connection open, NSS has a bug where 1158 // restarting the handshake for ClientAuth is currently broken. 1159 DCHECK_EQ(error, ERR_SSL_CLIENT_AUTH_CERT_NEEDED); 1160 1161 if (stream_.get()) { 1162 // Since we already have a stream, we're being called as part of SSL 1163 // renegotiation. 1164 DCHECK(!stream_request_.get()); 1165 stream_->Close(true); 1166 stream_.reset(); 1167 } 1168 1169 // The server is asking for a client certificate during the initial 1170 // handshake. 1171 stream_request_.reset(); 1172 1173 // If the user selected one of the certificates in client_certs or declined 1174 // to provide one for this server before, use the past decision 1175 // automatically. 1176 scoped_refptr<X509Certificate> client_cert; 1177 bool found_cached_cert = session_->ssl_client_auth_cache()->Lookup( 1178 response_.cert_request_info->host_and_port, &client_cert); 1179 if (!found_cached_cert) 1180 return error; 1181 1182 // Check that the certificate selected is still a certificate the server 1183 // is likely to accept, based on the criteria supplied in the 1184 // CertificateRequest message. 1185 if (client_cert.get()) { 1186 const std::vector<std::string>& cert_authorities = 1187 response_.cert_request_info->cert_authorities; 1188 1189 bool cert_still_valid = cert_authorities.empty() || 1190 client_cert->IsIssuedByEncoded(cert_authorities); 1191 if (!cert_still_valid) 1192 return error; 1193 } 1194 1195 // TODO(davidben): Add a unit test which covers this path; we need to be 1196 // able to send a legitimate certificate and also bypass/clear the 1197 // SSL session cache. 1198 SSLConfig* ssl_config = response_.cert_request_info->is_proxy ? 1199 &proxy_ssl_config_ : &server_ssl_config_; 1200 ssl_config->send_client_cert = true; 1201 ssl_config->client_cert = client_cert; 1202 next_state_ = STATE_CREATE_STREAM; 1203 // Reset the other member variables. 1204 // Note: this is necessary only with SSL renegotiation. 1205 ResetStateForRestart(); 1206 return OK; 1207} 1208 1209// TODO(rch): This does not correctly handle errors when an SSL proxy is 1210// being used, as all of the errors are handled as if they were generated 1211// by the endpoint host, request_->url, rather than considering if they were 1212// generated by the SSL proxy. http://crbug.com/69329 1213int HttpNetworkTransaction::HandleSSLHandshakeError(int error) { 1214 DCHECK(request_); 1215 if (server_ssl_config_.send_client_cert && 1216 (error == ERR_SSL_PROTOCOL_ERROR || IsClientCertificateError(error))) { 1217 session_->ssl_client_auth_cache()->Remove( 1218 GetHostAndPort(request_->url)); 1219 } 1220 1221 uint16 version_max = server_ssl_config_.version_max; 1222 1223 switch (error) { 1224 case ERR_SSL_PROTOCOL_ERROR: 1225 case ERR_SSL_VERSION_OR_CIPHER_MISMATCH: 1226 if (version_max >= SSL_PROTOCOL_VERSION_TLS1 && 1227 version_max > server_ssl_config_.version_min) { 1228 // This could be a TLS-intolerant server or a server that chose a 1229 // cipher suite defined only for higher protocol versions (such as 1230 // an SSL 3.0 server that chose a TLS-only cipher suite). Fall 1231 // back to the next lower version and retry. 1232 // NOTE: if the SSLClientSocket class doesn't support TLS 1.1, 1233 // specifying TLS 1.1 in version_max will result in a TLS 1.0 1234 // handshake, so falling back from TLS 1.1 to TLS 1.0 will simply 1235 // repeat the TLS 1.0 handshake. To avoid this problem, the default 1236 // version_max should match the maximum protocol version supported 1237 // by the SSLClientSocket class. 1238 version_max--; 1239 1240 // Fallback to the lower SSL version. 1241 // While SSL 3.0 fallback should be eliminated because of security 1242 // reasons, there is a high risk of breaking the servers if this is 1243 // done in general. 1244 // For now SSL 3.0 fallback is disabled for Google servers first, 1245 // and will be expanded to other servers after enough experiences 1246 // have been gained showing that this experiment works well with 1247 // today's Internet. 1248 if (version_max > SSL_PROTOCOL_VERSION_SSL3 || 1249 (server_ssl_config_.unrestricted_ssl3_fallback_enabled || 1250 !TransportSecurityState::IsGooglePinnedProperty( 1251 request_->url.host(), true /* include SNI */))) { 1252 net_log_.AddEvent( 1253 NetLog::TYPE_SSL_VERSION_FALLBACK, 1254 base::Bind(&NetLogSSLVersionFallbackCallback, 1255 &request_->url, error, server_ssl_config_.version_max, 1256 version_max)); 1257 server_ssl_config_.version_max = version_max; 1258 server_ssl_config_.version_fallback = true; 1259 ResetConnectionAndRequestForResend(); 1260 error = OK; 1261 } 1262 } 1263 break; 1264 } 1265 1266 return error; 1267} 1268 1269// This method determines whether it is safe to resend the request after an 1270// IO error. It can only be called in response to request header or body 1271// write errors or response header read errors. It should not be used in 1272// other cases, such as a Connect error. 1273int HttpNetworkTransaction::HandleIOError(int error) { 1274 // SSL errors may happen at any time during the stream and indicate issues 1275 // with the underlying connection. Because the peer may request 1276 // renegotiation at any time, check and handle any possible SSL handshake 1277 // related errors. In addition to renegotiation, TLS False Start may cause 1278 // SSL handshake errors (specifically servers with buggy DEFLATE support) 1279 // to be delayed until the first Read on the underlying connection. 1280 error = HandleSSLHandshakeError(error); 1281 1282 switch (error) { 1283 // If we try to reuse a connection that the server is in the process of 1284 // closing, we may end up successfully writing out our request (or a 1285 // portion of our request) only to find a connection error when we try to 1286 // read from (or finish writing to) the socket. 1287 case ERR_CONNECTION_RESET: 1288 case ERR_CONNECTION_CLOSED: 1289 case ERR_CONNECTION_ABORTED: 1290 // There can be a race between the socket pool checking checking whether a 1291 // socket is still connected, receiving the FIN, and sending/reading data 1292 // on a reused socket. If we receive the FIN between the connectedness 1293 // check and writing/reading from the socket, we may first learn the socket 1294 // is disconnected when we get a ERR_SOCKET_NOT_CONNECTED. This will most 1295 // likely happen when trying to retrieve its IP address. 1296 // See http://crbug.com/105824 for more details. 1297 case ERR_SOCKET_NOT_CONNECTED: 1298 if (ShouldResendRequest(error)) { 1299 net_log_.AddEventWithNetErrorCode( 1300 NetLog::TYPE_HTTP_TRANSACTION_RESTART_AFTER_ERROR, error); 1301 ResetConnectionAndRequestForResend(); 1302 error = OK; 1303 } 1304 break; 1305 case ERR_PIPELINE_EVICTION: 1306 if (!session_->force_http_pipelining()) { 1307 net_log_.AddEventWithNetErrorCode( 1308 NetLog::TYPE_HTTP_TRANSACTION_RESTART_AFTER_ERROR, error); 1309 ResetConnectionAndRequestForResend(); 1310 error = OK; 1311 } 1312 break; 1313 case ERR_SPDY_PING_FAILED: 1314 case ERR_SPDY_SERVER_REFUSED_STREAM: 1315 net_log_.AddEventWithNetErrorCode( 1316 NetLog::TYPE_HTTP_TRANSACTION_RESTART_AFTER_ERROR, error); 1317 ResetConnectionAndRequestForResend(); 1318 error = OK; 1319 break; 1320 } 1321 return error; 1322} 1323 1324void HttpNetworkTransaction::ResetStateForRestart() { 1325 ResetStateForAuthRestart(); 1326 stream_.reset(); 1327} 1328 1329void HttpNetworkTransaction::ResetStateForAuthRestart() { 1330 send_start_time_ = base::TimeTicks(); 1331 send_end_time_ = base::TimeTicks(); 1332 1333 pending_auth_target_ = HttpAuth::AUTH_NONE; 1334 read_buf_ = NULL; 1335 read_buf_len_ = 0; 1336 headers_valid_ = false; 1337 request_headers_.Clear(); 1338 response_ = HttpResponseInfo(); 1339 establishing_tunnel_ = false; 1340} 1341 1342HttpResponseHeaders* HttpNetworkTransaction::GetResponseHeaders() const { 1343 return response_.headers.get(); 1344} 1345 1346bool HttpNetworkTransaction::ShouldResendRequest(int error) const { 1347 bool connection_is_proven = stream_->IsConnectionReused(); 1348 bool has_received_headers = GetResponseHeaders() != NULL; 1349 1350 // NOTE: we resend a request only if we reused a keep-alive connection. 1351 // This automatically prevents an infinite resend loop because we'll run 1352 // out of the cached keep-alive connections eventually. 1353 if (connection_is_proven && !has_received_headers) 1354 return true; 1355 return false; 1356} 1357 1358void HttpNetworkTransaction::ResetConnectionAndRequestForResend() { 1359 if (stream_.get()) { 1360 stream_->Close(true); 1361 stream_.reset(); 1362 } 1363 1364 // We need to clear request_headers_ because it contains the real request 1365 // headers, but we may need to resend the CONNECT request first to recreate 1366 // the SSL tunnel. 1367 request_headers_.Clear(); 1368 next_state_ = STATE_CREATE_STREAM; // Resend the request. 1369} 1370 1371bool HttpNetworkTransaction::ShouldApplyProxyAuth() const { 1372 return !is_https_request() && 1373 (proxy_info_.is_https() || proxy_info_.is_http()); 1374} 1375 1376bool HttpNetworkTransaction::ShouldApplyServerAuth() const { 1377 return !(request_->load_flags & LOAD_DO_NOT_SEND_AUTH_DATA); 1378} 1379 1380int HttpNetworkTransaction::HandleAuthChallenge() { 1381 scoped_refptr<HttpResponseHeaders> headers(GetResponseHeaders()); 1382 DCHECK(headers.get()); 1383 1384 int status = headers->response_code(); 1385 if (status != HTTP_UNAUTHORIZED && 1386 status != HTTP_PROXY_AUTHENTICATION_REQUIRED) 1387 return OK; 1388 HttpAuth::Target target = status == HTTP_PROXY_AUTHENTICATION_REQUIRED ? 1389 HttpAuth::AUTH_PROXY : HttpAuth::AUTH_SERVER; 1390 if (target == HttpAuth::AUTH_PROXY && proxy_info_.is_direct()) 1391 return ERR_UNEXPECTED_PROXY_AUTH; 1392 1393 // This case can trigger when an HTTPS server responds with a "Proxy 1394 // authentication required" status code through a non-authenticating 1395 // proxy. 1396 if (!auth_controllers_[target].get()) 1397 return ERR_UNEXPECTED_PROXY_AUTH; 1398 1399 int rv = auth_controllers_[target]->HandleAuthChallenge( 1400 headers, (request_->load_flags & LOAD_DO_NOT_SEND_AUTH_DATA) != 0, false, 1401 net_log_); 1402 if (auth_controllers_[target]->HaveAuthHandler()) 1403 pending_auth_target_ = target; 1404 1405 scoped_refptr<AuthChallengeInfo> auth_info = 1406 auth_controllers_[target]->auth_info(); 1407 if (auth_info.get()) 1408 response_.auth_challenge = auth_info; 1409 1410 return rv; 1411} 1412 1413bool HttpNetworkTransaction::HaveAuth(HttpAuth::Target target) const { 1414 return auth_controllers_[target].get() && 1415 auth_controllers_[target]->HaveAuth(); 1416} 1417 1418GURL HttpNetworkTransaction::AuthURL(HttpAuth::Target target) const { 1419 switch (target) { 1420 case HttpAuth::AUTH_PROXY: { 1421 if (!proxy_info_.proxy_server().is_valid() || 1422 proxy_info_.proxy_server().is_direct()) { 1423 return GURL(); // There is no proxy server. 1424 } 1425 const char* scheme = proxy_info_.is_https() ? "https://" : "http://"; 1426 return GURL(scheme + 1427 proxy_info_.proxy_server().host_port_pair().ToString()); 1428 } 1429 case HttpAuth::AUTH_SERVER: 1430 return request_->url; 1431 default: 1432 return GURL(); 1433 } 1434} 1435 1436#define STATE_CASE(s) \ 1437 case s: \ 1438 description = base::StringPrintf("%s (0x%08X)", #s, s); \ 1439 break 1440 1441std::string HttpNetworkTransaction::DescribeState(State state) { 1442 std::string description; 1443 switch (state) { 1444 STATE_CASE(STATE_CREATE_STREAM); 1445 STATE_CASE(STATE_CREATE_STREAM_COMPLETE); 1446 STATE_CASE(STATE_INIT_REQUEST_BODY); 1447 STATE_CASE(STATE_INIT_REQUEST_BODY_COMPLETE); 1448 STATE_CASE(STATE_BUILD_REQUEST); 1449 STATE_CASE(STATE_BUILD_REQUEST_COMPLETE); 1450 STATE_CASE(STATE_SEND_REQUEST); 1451 STATE_CASE(STATE_SEND_REQUEST_COMPLETE); 1452 STATE_CASE(STATE_READ_HEADERS); 1453 STATE_CASE(STATE_READ_HEADERS_COMPLETE); 1454 STATE_CASE(STATE_READ_BODY); 1455 STATE_CASE(STATE_READ_BODY_COMPLETE); 1456 STATE_CASE(STATE_DRAIN_BODY_FOR_AUTH_RESTART); 1457 STATE_CASE(STATE_DRAIN_BODY_FOR_AUTH_RESTART_COMPLETE); 1458 STATE_CASE(STATE_NONE); 1459 default: 1460 description = base::StringPrintf("Unknown state 0x%08X (%u)", state, 1461 state); 1462 break; 1463 } 1464 return description; 1465} 1466 1467#undef STATE_CASE 1468 1469} // namespace net 1470