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| 1 /* | |
| 2 * Copyright 2004 The WebRTC Project Authors. All rights reserved. | |
| 3 * | |
| 4 * Use of this source code is governed by a BSD-style license | |
| 5 * that can be found in the LICENSE file in the root of the source | |
| 6 * tree. An additional intellectual property rights grant can be found | |
| 7 * in the file PATENTS. All contributing project authors may | |
| 8 * be found in the AUTHORS file in the root of the source tree. | |
| 9 */ | |
| 10 | |
| 11 #include <time.h> | |
| 12 #include <algorithm> | |
| 13 #include <memory> | |
| 14 #include "webrtc/base/asyncsocket.h" | |
| 15 #include "webrtc/base/common.h" | |
| 16 #include "webrtc/base/diskcache.h" | |
| 17 #include "webrtc/base/httpclient.h" | |
| 18 #include "webrtc/base/httpcommon-inl.h" | |
| 19 #include "webrtc/base/logging.h" | |
| 20 #include "webrtc/base/pathutils.h" | |
| 21 #include "webrtc/base/socketstream.h" | |
| 22 #include "webrtc/base/stringencode.h" | |
| 23 #include "webrtc/base/stringutils.h" | |
| 24 #include "webrtc/base/thread.h" | |
| 25 | |
| 26 namespace rtc { | |
| 27 | |
| 28 ////////////////////////////////////////////////////////////////////// | |
| 29 // Helpers | |
| 30 ////////////////////////////////////////////////////////////////////// | |
| 31 | |
| 32 namespace { | |
| 33 | |
| 34 const size_t kCacheHeader = 0; | |
| 35 const size_t kCacheBody = 1; | |
| 36 | |
| 37 // Convert decimal string to integer | |
| 38 bool HttpStringToUInt(const std::string& str, size_t* val) { | |
| 39 ASSERT(NULL != val); | |
| 40 char* eos = NULL; | |
| 41 *val = strtoul(str.c_str(), &eos, 10); | |
| 42 return (*eos == '\0'); | |
| 43 } | |
| 44 | |
| 45 bool HttpShouldCache(const HttpTransaction& t) { | |
| 46 bool verb_allows_cache = (t.request.verb == HV_GET) | |
| 47 || (t.request.verb == HV_HEAD); | |
| 48 bool is_range_response = t.response.hasHeader(HH_CONTENT_RANGE, NULL); | |
| 49 bool has_expires = t.response.hasHeader(HH_EXPIRES, NULL); | |
| 50 bool request_allows_cache = | |
| 51 has_expires || (std::string::npos != t.request.path.find('?')); | |
| 52 bool response_allows_cache = | |
| 53 has_expires || HttpCodeIsCacheable(t.response.scode); | |
| 54 | |
| 55 bool may_cache = verb_allows_cache | |
| 56 && request_allows_cache | |
| 57 && response_allows_cache | |
| 58 && !is_range_response; | |
| 59 | |
| 60 std::string value; | |
| 61 if (t.response.hasHeader(HH_CACHE_CONTROL, &value)) { | |
| 62 HttpAttributeList directives; | |
| 63 HttpParseAttributes(value.data(), value.size(), directives); | |
| 64 // Response Directives Summary: | |
| 65 // public - always cacheable | |
| 66 // private - do not cache in a shared cache | |
| 67 // no-cache - may cache, but must revalidate whether fresh or stale | |
| 68 // no-store - sensitive information, do not cache or store in any way | |
| 69 // max-age - supplants Expires for staleness | |
| 70 // s-maxage - use as max-age for shared caches, ignore otherwise | |
| 71 // must-revalidate - may cache, but must revalidate after stale | |
| 72 // proxy-revalidate - shared cache must revalidate | |
| 73 if (HttpHasAttribute(directives, "no-store", NULL)) { | |
| 74 may_cache = false; | |
| 75 } else if (HttpHasAttribute(directives, "public", NULL)) { | |
| 76 may_cache = true; | |
| 77 } | |
| 78 } | |
| 79 return may_cache; | |
| 80 } | |
| 81 | |
| 82 enum HttpCacheState { | |
| 83 HCS_FRESH, // In cache, may use | |
| 84 HCS_STALE, // In cache, must revalidate | |
| 85 HCS_NONE // Not in cache | |
| 86 }; | |
| 87 | |
| 88 HttpCacheState HttpGetCacheState(const HttpTransaction& t) { | |
| 89 // Temporaries | |
| 90 std::string s_temp; | |
| 91 time_t u_temp; | |
| 92 | |
| 93 // Current time | |
| 94 time_t now = time(0); | |
| 95 | |
| 96 HttpAttributeList cache_control; | |
| 97 if (t.response.hasHeader(HH_CACHE_CONTROL, &s_temp)) { | |
| 98 HttpParseAttributes(s_temp.data(), s_temp.size(), cache_control); | |
| 99 } | |
| 100 | |
| 101 // Compute age of cache document | |
| 102 time_t date; | |
| 103 if (!t.response.hasHeader(HH_DATE, &s_temp) | |
| 104 || !HttpDateToSeconds(s_temp, &date)) | |
| 105 return HCS_NONE; | |
| 106 | |
| 107 // TODO: Timestamp when cache request sent and response received? | |
| 108 time_t request_time = date; | |
| 109 time_t response_time = date; | |
| 110 | |
| 111 time_t apparent_age = 0; | |
| 112 if (response_time > date) { | |
| 113 apparent_age = response_time - date; | |
| 114 } | |
| 115 | |
| 116 time_t corrected_received_age = apparent_age; | |
| 117 size_t i_temp; | |
| 118 if (t.response.hasHeader(HH_AGE, &s_temp) | |
| 119 && HttpStringToUInt(s_temp, (&i_temp))) { | |
| 120 u_temp = static_cast<time_t>(i_temp); | |
| 121 corrected_received_age = std::max(apparent_age, u_temp); | |
| 122 } | |
| 123 | |
| 124 time_t response_delay = response_time - request_time; | |
| 125 time_t corrected_initial_age = corrected_received_age + response_delay; | |
| 126 time_t resident_time = now - response_time; | |
| 127 time_t current_age = corrected_initial_age + resident_time; | |
| 128 | |
| 129 // Compute lifetime of document | |
| 130 time_t lifetime; | |
| 131 if (HttpHasAttribute(cache_control, "max-age", &s_temp)) { | |
| 132 lifetime = atoi(s_temp.c_str()); | |
| 133 } else if (t.response.hasHeader(HH_EXPIRES, &s_temp) | |
| 134 && HttpDateToSeconds(s_temp, &u_temp)) { | |
| 135 lifetime = u_temp - date; | |
| 136 } else if (t.response.hasHeader(HH_LAST_MODIFIED, &s_temp) | |
| 137 && HttpDateToSeconds(s_temp, &u_temp)) { | |
| 138 // TODO: Issue warning 113 if age > 24 hours | |
| 139 lifetime = static_cast<size_t>(now - u_temp) / 10; | |
| 140 } else { | |
| 141 return HCS_STALE; | |
| 142 } | |
| 143 | |
| 144 return (lifetime > current_age) ? HCS_FRESH : HCS_STALE; | |
| 145 } | |
| 146 | |
| 147 enum HttpValidatorStrength { | |
| 148 HVS_NONE, | |
| 149 HVS_WEAK, | |
| 150 HVS_STRONG | |
| 151 }; | |
| 152 | |
| 153 HttpValidatorStrength | |
| 154 HttpRequestValidatorLevel(const HttpRequestData& request) { | |
| 155 if (HV_GET != request.verb) | |
| 156 return HVS_STRONG; | |
| 157 return request.hasHeader(HH_RANGE, NULL) ? HVS_STRONG : HVS_WEAK; | |
| 158 } | |
| 159 | |
| 160 HttpValidatorStrength | |
| 161 HttpResponseValidatorLevel(const HttpResponseData& response) { | |
| 162 std::string value; | |
| 163 if (response.hasHeader(HH_ETAG, &value)) { | |
| 164 bool is_weak = (strnicmp(value.c_str(), "W/", 2) == 0); | |
| 165 return is_weak ? HVS_WEAK : HVS_STRONG; | |
| 166 } | |
| 167 if (response.hasHeader(HH_LAST_MODIFIED, &value)) { | |
| 168 time_t last_modified, date; | |
| 169 if (HttpDateToSeconds(value, &last_modified) | |
| 170 && response.hasHeader(HH_DATE, &value) | |
| 171 && HttpDateToSeconds(value, &date) | |
| 172 && (last_modified + 60 < date)) { | |
| 173 return HVS_STRONG; | |
| 174 } | |
| 175 return HVS_WEAK; | |
| 176 } | |
| 177 return HVS_NONE; | |
| 178 } | |
| 179 | |
| 180 std::string GetCacheID(const HttpRequestData& request) { | |
| 181 std::string id, url; | |
| 182 id.append(ToString(request.verb)); | |
| 183 id.append("_"); | |
| 184 request.getAbsoluteUri(&url); | |
| 185 id.append(url); | |
| 186 return id; | |
| 187 } | |
| 188 | |
| 189 } // anonymous namespace | |
| 190 | |
| 191 ////////////////////////////////////////////////////////////////////// | |
| 192 // Public Helpers | |
| 193 ////////////////////////////////////////////////////////////////////// | |
| 194 | |
| 195 bool HttpWriteCacheHeaders(const HttpResponseData* response, | |
| 196 StreamInterface* output, size_t* size) { | |
| 197 size_t length = 0; | |
| 198 // Write all unknown and end-to-end headers to a cache file | |
| 199 for (HttpData::const_iterator it = response->begin(); | |
| 200 it != response->end(); ++it) { | |
| 201 HttpHeader header; | |
| 202 if (FromString(header, it->first) && !HttpHeaderIsEndToEnd(header)) | |
| 203 continue; | |
| 204 length += it->first.length() + 2 + it->second.length() + 2; | |
| 205 if (!output) | |
| 206 continue; | |
| 207 std::string formatted_header(it->first); | |
| 208 formatted_header.append(": "); | |
| 209 formatted_header.append(it->second); | |
| 210 formatted_header.append("\r\n"); | |
| 211 StreamResult result = output->WriteAll(formatted_header.data(), | |
| 212 formatted_header.length(), | |
| 213 NULL, NULL); | |
| 214 if (SR_SUCCESS != result) { | |
| 215 return false; | |
| 216 } | |
| 217 } | |
| 218 if (output && (SR_SUCCESS != output->WriteAll("\r\n", 2, NULL, NULL))) { | |
| 219 return false; | |
| 220 } | |
| 221 length += 2; | |
| 222 if (size) | |
| 223 *size = length; | |
| 224 return true; | |
| 225 } | |
| 226 | |
| 227 bool HttpReadCacheHeaders(StreamInterface* input, HttpResponseData* response, | |
| 228 HttpData::HeaderCombine combine) { | |
| 229 while (true) { | |
| 230 std::string formatted_header; | |
| 231 StreamResult result = input->ReadLine(&formatted_header); | |
| 232 if ((SR_EOS == result) || (1 == formatted_header.size())) { | |
| 233 break; | |
| 234 } | |
| 235 if (SR_SUCCESS != result) { | |
| 236 return false; | |
| 237 } | |
| 238 size_t end_of_name = formatted_header.find(':'); | |
| 239 if (std::string::npos == end_of_name) { | |
| 240 LOG_F(LS_WARNING) << "Malformed cache header"; | |
| 241 continue; | |
| 242 } | |
| 243 size_t start_of_value = end_of_name + 1; | |
| 244 size_t end_of_value = formatted_header.length(); | |
| 245 while ((start_of_value < end_of_value) | |
| 246 && isspace(formatted_header[start_of_value])) | |
| 247 ++start_of_value; | |
| 248 while ((start_of_value < end_of_value) | |
| 249 && isspace(formatted_header[end_of_value-1])) | |
| 250 --end_of_value; | |
| 251 size_t value_length = end_of_value - start_of_value; | |
| 252 | |
| 253 std::string name(formatted_header.substr(0, end_of_name)); | |
| 254 std::string value(formatted_header.substr(start_of_value, value_length)); | |
| 255 response->changeHeader(name, value, combine); | |
| 256 } | |
| 257 return true; | |
| 258 } | |
| 259 | |
| 260 ////////////////////////////////////////////////////////////////////// | |
| 261 // HttpClient | |
| 262 ////////////////////////////////////////////////////////////////////// | |
| 263 | |
| 264 const size_t kDefaultRetries = 1; | |
| 265 const size_t kMaxRedirects = 5; | |
| 266 | |
| 267 HttpClient::HttpClient(const std::string& agent, StreamPool* pool, | |
| 268 HttpTransaction* transaction) | |
| 269 : agent_(agent), pool_(pool), | |
| 270 transaction_(transaction), free_transaction_(false), | |
| 271 retries_(kDefaultRetries), attempt_(0), redirects_(0), | |
| 272 redirect_action_(REDIRECT_DEFAULT), | |
| 273 uri_form_(URI_DEFAULT), cache_(NULL), cache_state_(CS_READY), | |
| 274 resolver_(NULL) { | |
| 275 base_.notify(this); | |
| 276 if (NULL == transaction_) { | |
| 277 free_transaction_ = true; | |
| 278 transaction_ = new HttpTransaction; | |
| 279 } | |
| 280 } | |
| 281 | |
| 282 HttpClient::~HttpClient() { | |
| 283 base_.notify(NULL); | |
| 284 base_.abort(HE_SHUTDOWN); | |
| 285 if (resolver_) { | |
| 286 resolver_->Destroy(false); | |
| 287 } | |
| 288 release(); | |
| 289 if (free_transaction_) | |
| 290 delete transaction_; | |
| 291 } | |
| 292 | |
| 293 void HttpClient::reset() { | |
| 294 server_.Clear(); | |
| 295 request().clear(true); | |
| 296 response().clear(true); | |
| 297 context_.reset(); | |
| 298 redirects_ = 0; | |
| 299 base_.abort(HE_OPERATION_CANCELLED); | |
| 300 } | |
| 301 | |
| 302 void HttpClient::OnResolveResult(AsyncResolverInterface* resolver) { | |
| 303 if (resolver != resolver_) { | |
| 304 return; | |
| 305 } | |
| 306 int error = resolver_->GetError(); | |
| 307 server_ = resolver_->address(); | |
| 308 resolver_->Destroy(false); | |
| 309 resolver_ = NULL; | |
| 310 if (error != 0) { | |
| 311 LOG(LS_ERROR) << "Error " << error << " resolving name: " | |
| 312 << server_; | |
| 313 onHttpComplete(HM_CONNECT, HE_CONNECT_FAILED); | |
| 314 } else { | |
| 315 connect(); | |
| 316 } | |
| 317 } | |
| 318 | |
| 319 void HttpClient::StartDNSLookup() { | |
| 320 resolver_ = new AsyncResolver(); | |
| 321 resolver_->SignalDone.connect(this, &HttpClient::OnResolveResult); | |
| 322 resolver_->Start(server_); | |
| 323 } | |
| 324 | |
| 325 void HttpClient::set_server(const SocketAddress& address) { | |
| 326 server_ = address; | |
| 327 // Setting 'Host' here allows it to be overridden before starting the request, | |
| 328 // if necessary. | |
| 329 request().setHeader(HH_HOST, HttpAddress(server_, false), true); | |
| 330 } | |
| 331 | |
| 332 StreamInterface* HttpClient::GetDocumentStream() { | |
| 333 return base_.GetDocumentStream(); | |
| 334 } | |
| 335 | |
| 336 void HttpClient::start() { | |
| 337 if (base_.mode() != HM_NONE) { | |
| 338 // call reset() to abort an in-progress request | |
| 339 ASSERT(false); | |
| 340 return; | |
| 341 } | |
| 342 | |
| 343 ASSERT(!IsCacheActive()); | |
| 344 | |
| 345 if (request().hasHeader(HH_TRANSFER_ENCODING, NULL)) { | |
| 346 // Exact size must be known on the client. Instead of using chunked | |
| 347 // encoding, wrap data with auto-caching file or memory stream. | |
| 348 ASSERT(false); | |
| 349 return; | |
| 350 } | |
| 351 | |
| 352 attempt_ = 0; | |
| 353 | |
| 354 // If no content has been specified, using length of 0. | |
| 355 request().setHeader(HH_CONTENT_LENGTH, "0", false); | |
| 356 | |
| 357 if (!agent_.empty()) { | |
| 358 request().setHeader(HH_USER_AGENT, agent_, false); | |
| 359 } | |
| 360 | |
| 361 UriForm uri_form = uri_form_; | |
| 362 if (PROXY_HTTPS == proxy_.type) { | |
| 363 // Proxies require absolute form | |
| 364 uri_form = URI_ABSOLUTE; | |
| 365 request().version = HVER_1_0; | |
| 366 request().setHeader(HH_PROXY_CONNECTION, "Keep-Alive", false); | |
| 367 } else { | |
| 368 request().setHeader(HH_CONNECTION, "Keep-Alive", false); | |
| 369 } | |
| 370 | |
| 371 if (URI_ABSOLUTE == uri_form) { | |
| 372 // Convert to absolute uri form | |
| 373 std::string url; | |
| 374 if (request().getAbsoluteUri(&url)) { | |
| 375 request().path = url; | |
| 376 } else { | |
| 377 LOG(LS_WARNING) << "Couldn't obtain absolute uri"; | |
| 378 } | |
| 379 } else if (URI_RELATIVE == uri_form) { | |
| 380 // Convert to relative uri form | |
| 381 std::string host, path; | |
| 382 if (request().getRelativeUri(&host, &path)) { | |
| 383 request().setHeader(HH_HOST, host); | |
| 384 request().path = path; | |
| 385 } else { | |
| 386 LOG(LS_WARNING) << "Couldn't obtain relative uri"; | |
| 387 } | |
| 388 } | |
| 389 | |
| 390 if ((NULL != cache_) && CheckCache()) { | |
| 391 return; | |
| 392 } | |
| 393 | |
| 394 connect(); | |
| 395 } | |
| 396 | |
| 397 void HttpClient::connect() { | |
| 398 int stream_err; | |
| 399 if (server_.IsUnresolvedIP()) { | |
| 400 StartDNSLookup(); | |
| 401 return; | |
| 402 } | |
| 403 StreamInterface* stream = pool_->RequestConnectedStream(server_, &stream_err); | |
| 404 if (stream == NULL) { | |
| 405 ASSERT(0 != stream_err); | |
| 406 LOG(LS_ERROR) << "RequestConnectedStream error: " << stream_err; | |
| 407 onHttpComplete(HM_CONNECT, HE_CONNECT_FAILED); | |
| 408 } else { | |
| 409 base_.attach(stream); | |
| 410 if (stream->GetState() == SS_OPEN) { | |
| 411 base_.send(&transaction_->request); | |
| 412 } | |
| 413 } | |
| 414 } | |
| 415 | |
| 416 void HttpClient::prepare_get(const std::string& url) { | |
| 417 reset(); | |
| 418 Url<char> purl(url); | |
| 419 set_server(SocketAddress(purl.host(), purl.port())); | |
| 420 request().verb = HV_GET; | |
| 421 request().path = purl.full_path(); | |
| 422 } | |
| 423 | |
| 424 void HttpClient::prepare_post(const std::string& url, | |
| 425 const std::string& content_type, | |
| 426 StreamInterface* request_doc) { | |
| 427 reset(); | |
| 428 Url<char> purl(url); | |
| 429 set_server(SocketAddress(purl.host(), purl.port())); | |
| 430 request().verb = HV_POST; | |
| 431 request().path = purl.full_path(); | |
| 432 request().setContent(content_type, request_doc); | |
| 433 } | |
| 434 | |
| 435 void HttpClient::release() { | |
| 436 if (StreamInterface* stream = base_.detach()) { | |
| 437 pool_->ReturnConnectedStream(stream); | |
| 438 } | |
| 439 } | |
| 440 | |
| 441 bool HttpClient::ShouldRedirect(std::string* location) const { | |
| 442 // TODO: Unittest redirection. | |
| 443 if ((REDIRECT_NEVER == redirect_action_) | |
| 444 || !HttpCodeIsRedirection(response().scode) | |
| 445 || !response().hasHeader(HH_LOCATION, location) | |
| 446 || (redirects_ >= kMaxRedirects)) | |
| 447 return false; | |
| 448 return (REDIRECT_ALWAYS == redirect_action_) | |
| 449 || (HC_SEE_OTHER == response().scode) | |
| 450 || (HV_HEAD == request().verb) | |
| 451 || (HV_GET == request().verb); | |
| 452 } | |
| 453 | |
| 454 bool HttpClient::BeginCacheFile() { | |
| 455 ASSERT(NULL != cache_); | |
| 456 ASSERT(CS_READY == cache_state_); | |
| 457 | |
| 458 std::string id = GetCacheID(request()); | |
| 459 CacheLock lock(cache_, id, true); | |
| 460 if (!lock.IsLocked()) { | |
| 461 LOG_F(LS_WARNING) << "Couldn't lock cache"; | |
| 462 return false; | |
| 463 } | |
| 464 | |
| 465 if (HE_NONE != WriteCacheHeaders(id)) { | |
| 466 return false; | |
| 467 } | |
| 468 | |
| 469 std::unique_ptr<StreamInterface> stream( | |
| 470 cache_->WriteResource(id, kCacheBody)); | |
| 471 if (!stream) { | |
| 472 LOG_F(LS_ERROR) << "Couldn't open body cache"; | |
| 473 return false; | |
| 474 } | |
| 475 lock.Commit(); | |
| 476 | |
| 477 // Let's secretly replace the response document with Folgers Crystals, | |
| 478 // er, StreamTap, so that we can mirror the data to our cache. | |
| 479 StreamInterface* output = response().document.release(); | |
| 480 if (!output) { | |
| 481 output = new NullStream; | |
| 482 } | |
| 483 StreamTap* tap = new StreamTap(output, stream.release()); | |
| 484 response().document.reset(tap); | |
| 485 return true; | |
| 486 } | |
| 487 | |
| 488 HttpError HttpClient::WriteCacheHeaders(const std::string& id) { | |
| 489 std::unique_ptr<StreamInterface> stream( | |
| 490 cache_->WriteResource(id, kCacheHeader)); | |
| 491 if (!stream) { | |
| 492 LOG_F(LS_ERROR) << "Couldn't open header cache"; | |
| 493 return HE_CACHE; | |
| 494 } | |
| 495 | |
| 496 if (!HttpWriteCacheHeaders(&transaction_->response, stream.get(), NULL)) { | |
| 497 LOG_F(LS_ERROR) << "Couldn't write header cache"; | |
| 498 return HE_CACHE; | |
| 499 } | |
| 500 | |
| 501 return HE_NONE; | |
| 502 } | |
| 503 | |
| 504 void HttpClient::CompleteCacheFile() { | |
| 505 // Restore previous response document | |
| 506 StreamTap* tap = static_cast<StreamTap*>(response().document.release()); | |
| 507 response().document.reset(tap->Detach()); | |
| 508 | |
| 509 int error; | |
| 510 StreamResult result = tap->GetTapResult(&error); | |
| 511 | |
| 512 // Delete the tap and cache stream (which completes cache unlock) | |
| 513 delete tap; | |
| 514 | |
| 515 if (SR_SUCCESS != result) { | |
| 516 LOG(LS_ERROR) << "Cache file error: " << error; | |
| 517 cache_->DeleteResource(GetCacheID(request())); | |
| 518 } | |
| 519 } | |
| 520 | |
| 521 bool HttpClient::CheckCache() { | |
| 522 ASSERT(NULL != cache_); | |
| 523 ASSERT(CS_READY == cache_state_); | |
| 524 | |
| 525 std::string id = GetCacheID(request()); | |
| 526 if (!cache_->HasResource(id)) { | |
| 527 // No cache file available | |
| 528 return false; | |
| 529 } | |
| 530 | |
| 531 HttpError error = ReadCacheHeaders(id, true); | |
| 532 | |
| 533 if (HE_NONE == error) { | |
| 534 switch (HttpGetCacheState(*transaction_)) { | |
| 535 case HCS_FRESH: | |
| 536 // Cache content is good, read from cache | |
| 537 break; | |
| 538 case HCS_STALE: | |
| 539 // Cache content may be acceptable. Issue a validation request. | |
| 540 if (PrepareValidate()) { | |
| 541 return false; | |
| 542 } | |
| 543 // Couldn't validate, fall through. | |
| 544 FALLTHROUGH(); | |
| 545 case HCS_NONE: | |
| 546 // Cache content is not useable. Issue a regular request. | |
| 547 response().clear(false); | |
| 548 return false; | |
| 549 } | |
| 550 } | |
| 551 | |
| 552 if (HE_NONE == error) { | |
| 553 error = ReadCacheBody(id); | |
| 554 cache_state_ = CS_READY; | |
| 555 } | |
| 556 | |
| 557 if (HE_CACHE == error) { | |
| 558 LOG_F(LS_WARNING) << "Cache failure, continuing with normal request"; | |
| 559 response().clear(false); | |
| 560 return false; | |
| 561 } | |
| 562 | |
| 563 SignalHttpClientComplete(this, error); | |
| 564 return true; | |
| 565 } | |
| 566 | |
| 567 HttpError HttpClient::ReadCacheHeaders(const std::string& id, bool override) { | |
| 568 std::unique_ptr<StreamInterface> stream( | |
| 569 cache_->ReadResource(id, kCacheHeader)); | |
| 570 if (!stream) { | |
| 571 return HE_CACHE; | |
| 572 } | |
| 573 | |
| 574 HttpData::HeaderCombine combine = | |
| 575 override ? HttpData::HC_REPLACE : HttpData::HC_AUTO; | |
| 576 | |
| 577 if (!HttpReadCacheHeaders(stream.get(), &transaction_->response, combine)) { | |
| 578 LOG_F(LS_ERROR) << "Error reading cache headers"; | |
| 579 return HE_CACHE; | |
| 580 } | |
| 581 | |
| 582 response().scode = HC_OK; | |
| 583 return HE_NONE; | |
| 584 } | |
| 585 | |
| 586 HttpError HttpClient::ReadCacheBody(const std::string& id) { | |
| 587 cache_state_ = CS_READING; | |
| 588 | |
| 589 HttpError error = HE_NONE; | |
| 590 | |
| 591 size_t data_size; | |
| 592 std::unique_ptr<StreamInterface> stream(cache_->ReadResource(id, kCacheBody)); | |
| 593 if (!stream || !stream->GetAvailable(&data_size)) { | |
| 594 LOG_F(LS_ERROR) << "Unavailable cache body"; | |
| 595 error = HE_CACHE; | |
| 596 } else { | |
| 597 error = OnHeaderAvailable(false, false, data_size); | |
| 598 } | |
| 599 | |
| 600 if ((HE_NONE == error) | |
| 601 && (HV_HEAD != request().verb) | |
| 602 && response().document) { | |
| 603 // Allocate on heap to not explode the stack. | |
| 604 const int array_size = 1024 * 64; | |
| 605 std::unique_ptr<char[]> buffer(new char[array_size]); | |
| 606 StreamResult result = Flow(stream.get(), buffer.get(), array_size, | |
| 607 response().document.get()); | |
| 608 if (SR_SUCCESS != result) { | |
| 609 error = HE_STREAM; | |
| 610 } | |
| 611 } | |
| 612 | |
| 613 return error; | |
| 614 } | |
| 615 | |
| 616 bool HttpClient::PrepareValidate() { | |
| 617 ASSERT(CS_READY == cache_state_); | |
| 618 // At this point, request() contains the pending request, and response() | |
| 619 // contains the cached response headers. Reformat the request to validate | |
| 620 // the cached content. | |
| 621 HttpValidatorStrength vs_required = HttpRequestValidatorLevel(request()); | |
| 622 HttpValidatorStrength vs_available = HttpResponseValidatorLevel(response()); | |
| 623 if (vs_available < vs_required) { | |
| 624 return false; | |
| 625 } | |
| 626 std::string value; | |
| 627 if (response().hasHeader(HH_ETAG, &value)) { | |
| 628 request().addHeader(HH_IF_NONE_MATCH, value); | |
| 629 } | |
| 630 if (response().hasHeader(HH_LAST_MODIFIED, &value)) { | |
| 631 request().addHeader(HH_IF_MODIFIED_SINCE, value); | |
| 632 } | |
| 633 response().clear(false); | |
| 634 cache_state_ = CS_VALIDATING; | |
| 635 return true; | |
| 636 } | |
| 637 | |
| 638 HttpError HttpClient::CompleteValidate() { | |
| 639 ASSERT(CS_VALIDATING == cache_state_); | |
| 640 | |
| 641 std::string id = GetCacheID(request()); | |
| 642 | |
| 643 // Merge cached headers with new headers | |
| 644 HttpError error = ReadCacheHeaders(id, false); | |
| 645 if (HE_NONE != error) { | |
| 646 // Rewrite merged headers to cache | |
| 647 CacheLock lock(cache_, id); | |
| 648 error = WriteCacheHeaders(id); | |
| 649 } | |
| 650 if (HE_NONE != error) { | |
| 651 error = ReadCacheBody(id); | |
| 652 } | |
| 653 return error; | |
| 654 } | |
| 655 | |
| 656 HttpError HttpClient::OnHeaderAvailable(bool ignore_data, bool chunked, | |
| 657 size_t data_size) { | |
| 658 // If we are ignoring the data, this is an intermediate header. | |
| 659 // TODO: don't signal intermediate headers. Instead, do all header-dependent | |
| 660 // processing now, and either set up the next request, or fail outright. | |
| 661 // TODO: by default, only write response documents with a success code. | |
| 662 SignalHeaderAvailable(this, !ignore_data, ignore_data ? 0 : data_size); | |
| 663 if (!ignore_data && !chunked && (data_size != SIZE_UNKNOWN) | |
| 664 && response().document) { | |
| 665 // Attempt to pre-allocate space for the downloaded data. | |
| 666 if (!response().document->ReserveSize(data_size)) { | |
| 667 return HE_OVERFLOW; | |
| 668 } | |
| 669 } | |
| 670 return HE_NONE; | |
| 671 } | |
| 672 | |
| 673 // | |
| 674 // HttpBase Implementation | |
| 675 // | |
| 676 | |
| 677 HttpError HttpClient::onHttpHeaderComplete(bool chunked, size_t& data_size) { | |
| 678 if (CS_VALIDATING == cache_state_) { | |
| 679 if (HC_NOT_MODIFIED == response().scode) { | |
| 680 return CompleteValidate(); | |
| 681 } | |
| 682 // Should we remove conditional headers from request? | |
| 683 cache_state_ = CS_READY; | |
| 684 cache_->DeleteResource(GetCacheID(request())); | |
| 685 // Continue processing response as normal | |
| 686 } | |
| 687 | |
| 688 ASSERT(!IsCacheActive()); | |
| 689 if ((request().verb == HV_HEAD) || !HttpCodeHasBody(response().scode)) { | |
| 690 // HEAD requests and certain response codes contain no body | |
| 691 data_size = 0; | |
| 692 } | |
| 693 if (ShouldRedirect(NULL) | |
| 694 || ((HC_PROXY_AUTHENTICATION_REQUIRED == response().scode) | |
| 695 && (PROXY_HTTPS == proxy_.type))) { | |
| 696 // We're going to issue another request, so ignore the incoming data. | |
| 697 base_.set_ignore_data(true); | |
| 698 } | |
| 699 | |
| 700 HttpError error = OnHeaderAvailable(base_.ignore_data(), chunked, data_size); | |
| 701 if (HE_NONE != error) { | |
| 702 return error; | |
| 703 } | |
| 704 | |
| 705 if ((NULL != cache_) | |
| 706 && !base_.ignore_data() | |
| 707 && HttpShouldCache(*transaction_)) { | |
| 708 if (BeginCacheFile()) { | |
| 709 cache_state_ = CS_WRITING; | |
| 710 } | |
| 711 } | |
| 712 return HE_NONE; | |
| 713 } | |
| 714 | |
| 715 void HttpClient::onHttpComplete(HttpMode mode, HttpError err) { | |
| 716 if (((HE_DISCONNECTED == err) || (HE_CONNECT_FAILED == err) | |
| 717 || (HE_SOCKET_ERROR == err)) | |
| 718 && (HC_INTERNAL_SERVER_ERROR == response().scode) | |
| 719 && (attempt_ < retries_)) { | |
| 720 // If the response code has not changed from the default, then we haven't | |
| 721 // received anything meaningful from the server, so we are eligible for a | |
| 722 // retry. | |
| 723 ++attempt_; | |
| 724 if (request().document && !request().document->Rewind()) { | |
| 725 // Unable to replay the request document. | |
| 726 err = HE_STREAM; | |
| 727 } else { | |
| 728 release(); | |
| 729 connect(); | |
| 730 return; | |
| 731 } | |
| 732 } else if (err != HE_NONE) { | |
| 733 // fall through | |
| 734 } else if (mode == HM_CONNECT) { | |
| 735 base_.send(&transaction_->request); | |
| 736 return; | |
| 737 } else if ((mode == HM_SEND) || HttpCodeIsInformational(response().scode)) { | |
| 738 // If you're interested in informational headers, catch | |
| 739 // SignalHeaderAvailable. | |
| 740 base_.recv(&transaction_->response); | |
| 741 return; | |
| 742 } else { | |
| 743 if (!HttpShouldKeepAlive(response())) { | |
| 744 LOG(LS_VERBOSE) << "HttpClient: closing socket"; | |
| 745 base_.stream()->Close(); | |
| 746 } | |
| 747 std::string location; | |
| 748 if (ShouldRedirect(&location)) { | |
| 749 Url<char> purl(location); | |
| 750 set_server(SocketAddress(purl.host(), purl.port())); | |
| 751 request().path = purl.full_path(); | |
| 752 if (response().scode == HC_SEE_OTHER) { | |
| 753 request().verb = HV_GET; | |
| 754 request().clearHeader(HH_CONTENT_TYPE); | |
| 755 request().clearHeader(HH_CONTENT_LENGTH); | |
| 756 request().document.reset(); | |
| 757 } else if (request().document && !request().document->Rewind()) { | |
| 758 // Unable to replay the request document. | |
| 759 ASSERT(REDIRECT_ALWAYS == redirect_action_); | |
| 760 err = HE_STREAM; | |
| 761 } | |
| 762 if (err == HE_NONE) { | |
| 763 ++redirects_; | |
| 764 context_.reset(); | |
| 765 response().clear(false); | |
| 766 release(); | |
| 767 start(); | |
| 768 return; | |
| 769 } | |
| 770 } else if ((HC_PROXY_AUTHENTICATION_REQUIRED == response().scode) | |
| 771 && (PROXY_HTTPS == proxy_.type)) { | |
| 772 std::string authorization, auth_method; | |
| 773 HttpData::const_iterator begin = response().begin(HH_PROXY_AUTHENTICATE); | |
| 774 HttpData::const_iterator end = response().end(HH_PROXY_AUTHENTICATE); | |
| 775 for (HttpData::const_iterator it = begin; it != end; ++it) { | |
| 776 HttpAuthContext *context = context_.get(); | |
| 777 HttpAuthResult res = HttpAuthenticate( | |
| 778 it->second.data(), it->second.size(), | |
| 779 proxy_.address, | |
| 780 ToString(request().verb), request().path, | |
| 781 proxy_.username, proxy_.password, | |
| 782 context, authorization, auth_method); | |
| 783 context_.reset(context); | |
| 784 if (res == HAR_RESPONSE) { | |
| 785 request().setHeader(HH_PROXY_AUTHORIZATION, authorization); | |
| 786 if (request().document && !request().document->Rewind()) { | |
| 787 err = HE_STREAM; | |
| 788 } else { | |
| 789 // Explicitly do not reset the HttpAuthContext | |
| 790 response().clear(false); | |
| 791 // TODO: Reuse socket when authenticating? | |
| 792 release(); | |
| 793 start(); | |
| 794 return; | |
| 795 } | |
| 796 } else if (res == HAR_IGNORE) { | |
| 797 LOG(INFO) << "Ignoring Proxy-Authenticate: " << auth_method; | |
| 798 continue; | |
| 799 } else { | |
| 800 break; | |
| 801 } | |
| 802 } | |
| 803 } | |
| 804 } | |
| 805 if (CS_WRITING == cache_state_) { | |
| 806 CompleteCacheFile(); | |
| 807 cache_state_ = CS_READY; | |
| 808 } else if (CS_READING == cache_state_) { | |
| 809 cache_state_ = CS_READY; | |
| 810 } | |
| 811 release(); | |
| 812 SignalHttpClientComplete(this, err); | |
| 813 } | |
| 814 | |
| 815 void HttpClient::onHttpClosed(HttpError err) { | |
| 816 // This shouldn't occur, since we return the stream to the pool upon command | |
| 817 // completion. | |
| 818 ASSERT(false); | |
| 819 } | |
| 820 | |
| 821 ////////////////////////////////////////////////////////////////////// | |
| 822 // HttpClientDefault | |
| 823 ////////////////////////////////////////////////////////////////////// | |
| 824 | |
| 825 HttpClientDefault::HttpClientDefault(SocketFactory* factory, | |
| 826 const std::string& agent, | |
| 827 HttpTransaction* transaction) | |
| 828 : ReuseSocketPool(factory ? factory : Thread::Current()->socketserver()), | |
| 829 HttpClient(agent, NULL, transaction) { | |
| 830 set_pool(this); | |
| 831 } | |
| 832 | |
| 833 ////////////////////////////////////////////////////////////////////// | |
| 834 | |
| 835 } // namespace rtc | |
| OLD | NEW |
|---|
Chromium Code Reviews
Issue 2366333002:
Delete unused code httprequest, httpclient, and socketpool. (Closed)
