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| 1 // Copyright 2015 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 "content/public/test/test_download_request_handler.h" |
| 6 |
| 7 #include "base/logging.h" |
| 8 #include "base/memory/weak_ptr.h" |
| 9 #include "base/run_loop.h" |
| 10 #include "content/public/browser/browser_thread.h" |
| 11 #include "net/base/io_buffer.h" |
| 12 #include "net/http/http_request_headers.h" |
| 13 #include "net/http/http_response_headers.h" |
| 14 #include "net/url_request/url_request_filter.h" |
| 15 #include "net/url_request/url_request_interceptor.h" |
| 16 |
| 17 namespace content { |
| 18 |
| 19 namespace { |
| 20 |
| 21 using Parameters = TestDownloadRequestHandler::Parameters; |
| 22 using InjectedError = TestDownloadRequestHandler::InjectedError; |
| 23 |
| 24 class Interceptor : public net::URLRequestInterceptor { |
| 25 public: |
| 26 static base::WeakPtr<Interceptor> Register(const GURL& url); |
| 27 |
| 28 using JobFactory = |
| 29 base::Callback<net::URLRequestJob*(net::URLRequest*, |
| 30 net::NetworkDelegate*, |
| 31 base::WeakPtr<Interceptor>)>; |
| 32 |
| 33 ~Interceptor() override; |
| 34 void Unregister(); |
| 35 void SetJobFactory(const JobFactory& factory); |
| 36 void GetAndResetCompletedRequests( |
| 37 TestDownloadRequestHandler::CompletedRequests* requests); |
| 38 void AddCompletedRequest( |
| 39 const TestDownloadRequestHandler::CompletedRequest& request_info); |
| 40 |
| 41 private: |
| 42 Interceptor(const GURL& url); |
| 43 |
| 44 // net::URLRequestInterceptor |
| 45 net::URLRequestJob* MaybeInterceptRequest( |
| 46 net::URLRequest* request, |
| 47 net::NetworkDelegate* network_delegate) const override; |
| 48 |
| 49 TestDownloadRequestHandler::CompletedRequests completed_requests_; |
| 50 GURL url_; |
| 51 JobFactory job_factory_; |
| 52 mutable base::WeakPtrFactory<Interceptor> weak_ptr_factory_; |
| 53 DISALLOW_COPY_AND_ASSIGN(Interceptor); |
| 54 }; |
| 55 |
| 56 class PartialResponseJob : public net::URLRequestJob { |
| 57 public: |
| 58 static net::URLRequestJob* Factory(const Parameters& parameters, |
| 59 net::URLRequest* request, |
| 60 net::NetworkDelegate* delegate, |
| 61 base::WeakPtr<Interceptor> interceptor); |
| 62 |
| 63 // URLRequestJob |
| 64 void Start() override; |
| 65 void GetResponseInfo(net::HttpResponseInfo* response_info) override; |
| 66 int64 GetTotalReceivedBytes() const override; |
| 67 bool GetMimeType(std::string* mime_type) const override; |
| 68 int GetResponseCode() const override; |
| 69 bool ReadRawData(net::IOBuffer* buf, int buf_size, int* bytes_read) override; |
| 70 |
| 71 private: |
| 72 PartialResponseJob(scoped_ptr<Parameters> parameters, |
| 73 base::WeakPtr<Interceptor> interceptor, |
| 74 net::URLRequest* url_request, |
| 75 net::NetworkDelegate* network_delegate); |
| 76 |
| 77 ~PartialResponseJob() override; |
| 78 void ReportCompletedRequest(int64_t transferred_content_length); |
| 79 |
| 80 scoped_ptr<Parameters> parameters_; |
| 81 |
| 82 base::WeakPtr<Interceptor> interceptor_; |
| 83 net::HttpResponseInfo response_info_; |
| 84 int64_t offset_ = -1; |
| 85 int64_t offset_begin_ = -1; |
| 86 int64_t offset_end_ = -1; |
| 87 base::WeakPtrFactory<PartialResponseJob> weak_factory_; |
| 88 |
| 89 DISALLOW_COPY_AND_ASSIGN(PartialResponseJob); |
| 90 }; |
| 91 |
| 92 class StaticResponseJob : public net::URLRequestJob { |
| 93 public: |
| 94 static net::URLRequestJob* Factory(const std::string& headers, |
| 95 net::URLRequest* request, |
| 96 net::NetworkDelegate* delegate, |
| 97 base::WeakPtr<Interceptor> interceptor); |
| 98 // URLRequestJob |
| 99 void Start() override; |
| 100 void GetResponseInfo(net::HttpResponseInfo* response_info) override; |
| 101 |
| 102 private: |
| 103 StaticResponseJob(const std::string& headers, |
| 104 net::URLRequest* url_request, |
| 105 net::NetworkDelegate* network_delegate); |
| 106 ~StaticResponseJob() override; |
| 107 |
| 108 net::HttpResponseInfo response_info_; |
| 109 base::WeakPtrFactory<StaticResponseJob> weak_factory_; |
| 110 DISALLOW_COPY_AND_ASSIGN(StaticResponseJob); |
| 111 }; |
| 112 |
| 113 // static |
| 114 net::URLRequestJob* PartialResponseJob::Factory( |
| 115 const Parameters& parameters, |
| 116 net::URLRequest* request, |
| 117 net::NetworkDelegate* delegate, |
| 118 base::WeakPtr<Interceptor> interceptor) { |
| 119 return new PartialResponseJob(make_scoped_ptr(new Parameters(parameters)), |
| 120 interceptor, request, delegate); |
| 121 } |
| 122 |
| 123 PartialResponseJob::PartialResponseJob(scoped_ptr<Parameters> parameters, |
| 124 base::WeakPtr<Interceptor> interceptor, |
| 125 net::URLRequest* request, |
| 126 net::NetworkDelegate* network_delegate) |
| 127 : net::URLRequestJob(request, network_delegate), |
| 128 parameters_(parameters.Pass()), |
| 129 interceptor_(interceptor), |
| 130 weak_factory_(this) { |
| 131 DCHECK(parameters_.get()); |
| 132 DCHECK_LT(0, parameters_->size); |
| 133 DCHECK_NE(-1, parameters_->pattern_generator_seed); |
| 134 } |
| 135 |
| 136 PartialResponseJob::~PartialResponseJob() {} |
| 137 |
| 138 void PartialResponseJob::Start() { |
| 139 DVLOG(1) << "Starting request for " << request()->url().spec(); |
| 140 SetStatus(net::URLRequestStatus()); |
| 141 std::stringstream response_headers; |
| 142 |
| 143 const net::HttpRequestHeaders extra_headers = |
| 144 request()->extra_request_headers(); |
| 145 |
| 146 DCHECK(request()->method() == "GET") << "PartialResponseJob only " |
| 147 "knows how to respond to GET " |
| 148 "requests"; |
| 149 offset_begin_ = 0; |
| 150 offset_end_ = parameters_->size - 1; |
| 151 std::string value; |
| 152 std::string range_header; |
| 153 std::vector<net::HttpByteRange> byte_ranges; |
| 154 |
| 155 if (parameters_->support_byte_ranges && |
| 156 extra_headers.GetHeader(net::HttpRequestHeaders::kIfRange, &value) && |
| 157 !value.empty() && value == parameters_->etag && |
| 158 extra_headers.GetHeader(net::HttpRequestHeaders::kRange, &range_header) && |
| 159 net::HttpUtil::ParseRangeHeader(range_header, &byte_ranges) && |
| 160 byte_ranges.size() > 0) { |
| 161 if (byte_ranges[0].ComputeBounds(parameters_->size)) { |
| 162 offset_begin_ = byte_ranges[0].first_byte_position(); |
| 163 offset_end_ = byte_ranges[0].last_byte_position(); |
| 164 response_headers << "HTTP/1.1 206 Partial content\r\n"; |
| 165 response_headers << "Content-Range: bytes " << offset_begin_ << "-" |
| 166 << offset_end_ << "/" << parameters_->size << "\r\n"; |
| 167 response_headers << "Content-Length: " << offset_end_ - offset_begin_ + 1 |
| 168 << "\r\n"; |
| 169 } else { |
| 170 response_headers << "HTTP/1.1 416 Range not satisfiable\r\n"; |
| 171 response_headers << "Content-Range: bytes */" << parameters_->size |
| 172 << "\r\n"; |
| 173 } |
| 174 } else { |
| 175 response_headers << "HTTP/1.1 200 Success\r\n"; |
| 176 response_headers << "Content-Length: " << parameters_->size << "\r\n"; |
| 177 } |
| 178 if (!parameters_->content_type.empty()) |
| 179 response_headers << "Content-Type: " << parameters_->content_type << "\r\n"; |
| 180 |
| 181 if (parameters_->support_byte_ranges) |
| 182 response_headers << "Accept-Ranges: bytes\r\n"; |
| 183 |
| 184 if (!parameters_->etag.empty()) |
| 185 response_headers << "ETag: " << parameters_->etag << "\r\n"; |
| 186 |
| 187 if (!parameters_->last_modified.empty()) |
| 188 response_headers << "Last-Modified: " << parameters_->last_modified |
| 189 << "\r\n"; |
| 190 |
| 191 std::string raw_headers = response_headers.str(); |
| 192 response_info_.headers = |
| 193 new net::HttpResponseHeaders(net::HttpUtil::AssembleRawHeaders( |
| 194 raw_headers.c_str(), raw_headers.size())); |
| 195 offset_ = offset_begin_; |
| 196 |
| 197 while (!parameters_->injected_errors.empty() && |
| 198 parameters_->injected_errors.front().offset <= offset_) |
| 199 parameters_->injected_errors.pop(); |
| 200 |
| 201 DVLOG(1) << "Notifying response headers complete with headers:\n" |
| 202 << raw_headers; |
| 203 base::MessageLoop::current()->PostTask( |
| 204 FROM_HERE, base::Bind(&PartialResponseJob::NotifyHeadersComplete, |
| 205 weak_factory_.GetWeakPtr())); |
| 206 } |
| 207 |
| 208 void PartialResponseJob::GetResponseInfo(net::HttpResponseInfo* response_info) { |
| 209 *response_info = response_info_; |
| 210 } |
| 211 |
| 212 int64 PartialResponseJob::GetTotalReceivedBytes() const { |
| 213 return offset_ - offset_begin_; |
| 214 } |
| 215 |
| 216 bool PartialResponseJob::GetMimeType(std::string* mime_type) const { |
| 217 *mime_type = parameters_->content_type; |
| 218 return !parameters_->content_type.empty(); |
| 219 } |
| 220 |
| 221 int PartialResponseJob::GetResponseCode() const { |
| 222 return response_info_.headers.get() ? response_info_.headers->response_code() |
| 223 : 0; |
| 224 } |
| 225 |
| 226 bool PartialResponseJob::ReadRawData(net::IOBuffer* buf, |
| 227 int buf_size, |
| 228 int* bytes_read) { |
| 229 *bytes_read = 0; |
| 230 DVLOG(1) << "Reading " << buf_size << " bytes"; |
| 231 if (offset_ > offset_end_) { |
| 232 ReportCompletedRequest(offset_end_ - offset_begin_ + 1); |
| 233 DVLOG(1) << "Done reading."; |
| 234 return true; |
| 235 } |
| 236 |
| 237 int64_t range_end = std::min(offset_end_, offset_ + buf_size - 1); |
| 238 if (!parameters_->injected_errors.empty()) { |
| 239 const InjectedError& injected_error = parameters_->injected_errors.front(); |
| 240 if (offset_ == injected_error.offset) { |
| 241 int error = injected_error.error; |
| 242 SetStatus(net::URLRequestStatus(net::URLRequestStatus::FAILED, error)); |
| 243 DVLOG(1) << "Returning error " << net::ErrorToString(error); |
| 244 ReportCompletedRequest(injected_error.offset - offset_begin_); |
| 245 parameters_->injected_errors.pop(); |
| 246 return false; |
| 247 } |
| 248 |
| 249 if (offset_ < injected_error.offset && injected_error.offset <= range_end) |
| 250 range_end = injected_error.offset - 1; |
| 251 } |
| 252 int bytes_to_copy = (range_end - offset_) + 1; |
| 253 |
| 254 TestDownloadRequestHandler::GetPatternBytes( |
| 255 parameters_->pattern_generator_seed, offset_, bytes_to_copy, buf->data()); |
| 256 DVLOG(1) << "Read " << bytes_to_copy << " bytes at offset " << offset_; |
| 257 offset_ += bytes_to_copy; |
| 258 *bytes_read = bytes_to_copy; |
| 259 return true; |
| 260 } |
| 261 |
| 262 void PartialResponseJob::ReportCompletedRequest( |
| 263 int64_t transferred_content_length) { |
| 264 if (interceptor_.get()) { |
| 265 TestDownloadRequestHandler::CompletedRequest request_info; |
| 266 request_info.transferred_content_length = transferred_content_length; |
| 267 request_info.request_headers = request()->extra_request_headers(); |
| 268 interceptor_->AddCompletedRequest(request_info); |
| 269 } |
| 270 } |
| 271 |
| 272 // static |
| 273 net::URLRequestJob* StaticResponseJob::Factory( |
| 274 const std::string& headers, |
| 275 net::URLRequest* request, |
| 276 net::NetworkDelegate* delegate, |
| 277 base::WeakPtr<Interceptor> interceptor) { |
| 278 return new StaticResponseJob(headers, request, delegate); |
| 279 } |
| 280 |
| 281 StaticResponseJob::StaticResponseJob(const std::string& headers, |
| 282 net::URLRequest* url_request, |
| 283 net::NetworkDelegate* network_delegate) |
| 284 : URLRequestJob(url_request, network_delegate), weak_factory_(this) { |
| 285 response_info_.headers = new net::HttpResponseHeaders( |
| 286 net::HttpUtil::AssembleRawHeaders(headers.c_str(), headers.size())); |
| 287 } |
| 288 |
| 289 StaticResponseJob::~StaticResponseJob() {} |
| 290 |
| 291 void StaticResponseJob::Start() { |
| 292 base::MessageLoop::current()->PostTask( |
| 293 FROM_HERE, base::Bind(&StaticResponseJob::NotifyHeadersComplete, |
| 294 weak_factory_.GetWeakPtr())); |
| 295 return; |
| 296 } |
| 297 |
| 298 void StaticResponseJob::GetResponseInfo(net::HttpResponseInfo* response_info) { |
| 299 *response_info = response_info_; |
| 300 } |
| 301 |
| 302 template <class T> |
| 303 void StoreValueAndInvokeClosure(const base::Closure& quit_closure, |
| 304 T* value_receiver, |
| 305 T value) { |
| 306 *value_receiver = value; |
| 307 quit_closure.Run(); |
| 308 } |
| 309 |
| 310 // Xorshift* PRNG from https://en.wikipedia.org/wiki/Xorshift |
| 311 uint64_t XorShift64StarWithIndex(uint64_t seed, uint64_t index) { |
| 312 const uint64_t kMultiplier = UINT64_C(2685821657736338717); |
| 313 uint64_t x = seed * kMultiplier + index; |
| 314 x ^= x >> 12; |
| 315 x ^= x << 25; |
| 316 x ^= x >> 27; |
| 317 return x * kMultiplier; |
| 318 } |
| 319 |
| 320 // static |
| 321 base::WeakPtr<Interceptor> Interceptor::Register(const GURL& url) { |
| 322 DCHECK(url.is_valid()); |
| 323 scoped_ptr<Interceptor> interceptor(new Interceptor(url)); |
| 324 base::WeakPtr<Interceptor> weak_reference = |
| 325 interceptor->weak_ptr_factory_.GetWeakPtr(); |
| 326 net::URLRequestFilter* filter = net::URLRequestFilter::GetInstance(); |
| 327 filter->AddUrlInterceptor(url, interceptor.Pass()); |
| 328 return weak_reference; |
| 329 } |
| 330 |
| 331 void Interceptor::Unregister() { |
| 332 net::URLRequestFilter* filter = net::URLRequestFilter::GetInstance(); |
| 333 filter->RemoveUrlHandler(url_); |
| 334 } |
| 335 |
| 336 void Interceptor::SetJobFactory(const JobFactory& job_factory) { |
| 337 job_factory_ = job_factory; |
| 338 } |
| 339 |
| 340 void Interceptor::GetAndResetCompletedRequests( |
| 341 TestDownloadRequestHandler::CompletedRequests* requests) { |
| 342 requests->clear(); |
| 343 completed_requests_.swap(*requests); |
| 344 } |
| 345 |
| 346 void Interceptor::AddCompletedRequest( |
| 347 const TestDownloadRequestHandler::CompletedRequest& request_info) { |
| 348 completed_requests_.push_back(request_info); |
| 349 } |
| 350 |
| 351 Interceptor::Interceptor(const GURL& url) |
| 352 : url_(url), weak_ptr_factory_(this) {} |
| 353 |
| 354 Interceptor::~Interceptor() {} |
| 355 |
| 356 net::URLRequestJob* Interceptor::MaybeInterceptRequest( |
| 357 net::URLRequest* request, |
| 358 net::NetworkDelegate* network_delegate) const { |
| 359 DVLOG(1) << "Intercepting request for " << request->url() |
| 360 << " with headers:\n" << request->extra_request_headers().ToString(); |
| 361 if (job_factory_.is_null()) |
| 362 return nullptr; |
| 363 return job_factory_.Run(request, network_delegate, |
| 364 weak_ptr_factory_.GetWeakPtr()); |
| 365 } |
| 366 |
| 367 } // namespace |
| 368 |
| 369 struct TestDownloadRequestHandler::InterceptorProxy { |
| 370 base::WeakPtr<Interceptor> interceptor_; |
| 371 }; |
| 372 |
| 373 TestDownloadRequestHandler::InjectedError::InjectedError(int64_t offset, |
| 374 net::Error error) |
| 375 : offset(offset), error(error) {} |
| 376 |
| 377 // static |
| 378 Parameters TestDownloadRequestHandler::Parameters::WithSingleInterruption() { |
| 379 Parameters parameters; |
| 380 parameters.injected_errors.push( |
| 381 InjectedError(parameters.size / 2, net::ERR_CONNECTION_RESET)); |
| 382 return parameters; |
| 383 } |
| 384 |
| 385 TestDownloadRequestHandler::Parameters::Parameters(const Parameters& other) |
| 386 : etag(other.etag), |
| 387 last_modified(other.last_modified), |
| 388 content_type(other.content_type), |
| 389 size(other.size), |
| 390 pattern_generator_seed(other.pattern_generator_seed), |
| 391 support_byte_ranges(other.support_byte_ranges), |
| 392 injected_errors(other.injected_errors) {} |
| 393 |
| 394 TestDownloadRequestHandler::Parameters::Parameters() |
| 395 : etag("abcd"), |
| 396 last_modified("Tue, 15 Nov 1994 12:45:26 GMT"), |
| 397 content_type("application/octet-stream"), |
| 398 size(102400), |
| 399 pattern_generator_seed(1), |
| 400 support_byte_ranges(true) {} |
| 401 |
| 402 TestDownloadRequestHandler::Parameters::Parameters( |
| 403 const std::string& etag, |
| 404 const std::string& last_modified, |
| 405 const std::string& content_type, |
| 406 int64_t size, |
| 407 int pattern_generator_seed, |
| 408 bool support_byte_ranges) |
| 409 : etag(etag), |
| 410 last_modified(last_modified), |
| 411 content_type(content_type), |
| 412 size(size), |
| 413 pattern_generator_seed(pattern_generator_seed), |
| 414 support_byte_ranges(support_byte_ranges) {} |
| 415 |
| 416 TestDownloadRequestHandler::Parameters::~Parameters() {} |
| 417 |
| 418 void TestDownloadRequestHandler::Parameters::ClearInjectedErrors() { |
| 419 std::queue<InjectedError> empty_error_list; |
| 420 injected_errors.swap(empty_error_list); |
| 421 } |
| 422 |
| 423 TestDownloadRequestHandler::TestDownloadRequestHandler() |
| 424 : TestDownloadRequestHandler(GURL("http://example.com/download")) {} |
| 425 |
| 426 TestDownloadRequestHandler::TestDownloadRequestHandler(const GURL& url) |
| 427 : url_(url) { |
| 428 interceptor_proxy_.reset(new InterceptorProxy); |
| 429 base::RunLoop run_loop; |
| 430 BrowserThread::PostTaskAndReplyWithResult( |
| 431 BrowserThread::IO, FROM_HERE, base::Bind(&Interceptor::Register, url_), |
| 432 base::Bind(&StoreValueAndInvokeClosure<base::WeakPtr<Interceptor>>, |
| 433 run_loop.QuitClosure(), &interceptor_proxy_->interceptor_)); |
| 434 run_loop.Run(); |
| 435 } |
| 436 |
| 437 void TestDownloadRequestHandler::StartServing(const Parameters& parameters) { |
| 438 Interceptor::JobFactory job_factory = |
| 439 base::Bind(&PartialResponseJob::Factory, parameters); |
| 440 BrowserThread::PostTask( |
| 441 BrowserThread::IO, FROM_HERE, |
| 442 base::Bind(&Interceptor::SetJobFactory, interceptor_proxy_->interceptor_, |
| 443 job_factory)); |
| 444 } |
| 445 |
| 446 void TestDownloadRequestHandler::StartServingStaticResponse( |
| 447 const base::StringPiece& headers) { |
| 448 Interceptor::JobFactory job_factory = |
| 449 base::Bind(&StaticResponseJob::Factory, headers.as_string()); |
| 450 BrowserThread::PostTask( |
| 451 BrowserThread::IO, FROM_HERE, |
| 452 base::Bind(&Interceptor::SetJobFactory, interceptor_proxy_->interceptor_, |
| 453 job_factory)); |
| 454 } |
| 455 |
| 456 // static |
| 457 void TestDownloadRequestHandler::GetPatternBytes(int seed, |
| 458 int64_t starting_offset, |
| 459 int length, |
| 460 char* buffer) { |
| 461 int64_t seed_offset = starting_offset / sizeof(int64_t); |
| 462 int64_t first_byte_position = starting_offset % sizeof(int64_t); |
| 463 while (length > 0) { |
| 464 uint64_t data = XorShift64StarWithIndex(seed, seed_offset); |
| 465 int length_to_copy = |
| 466 std::min(length, static_cast<int>(sizeof(data) - first_byte_position)); |
| 467 memcpy(buffer, reinterpret_cast<char*>(&data) + first_byte_position, |
| 468 length_to_copy); |
| 469 buffer += length_to_copy; |
| 470 length -= length_to_copy; |
| 471 ++seed_offset; |
| 472 first_byte_position = 0; |
| 473 } |
| 474 } |
| 475 |
| 476 TestDownloadRequestHandler::~TestDownloadRequestHandler() { |
| 477 BrowserThread::PostTask( |
| 478 BrowserThread::IO, FROM_HERE, |
| 479 base::Bind(&Interceptor::Unregister, interceptor_proxy_->interceptor_)); |
| 480 } |
| 481 |
| 482 void TestDownloadRequestHandler::GetCompletedRequestInfo( |
| 483 TestDownloadRequestHandler::CompletedRequests* requests) { |
| 484 base::RunLoop run_loop; |
| 485 BrowserThread::PostTaskAndReply( |
| 486 BrowserThread::IO, FROM_HERE, |
| 487 base::Bind(&Interceptor::GetAndResetCompletedRequests, |
| 488 interceptor_proxy_->interceptor_, requests), |
| 489 run_loop.QuitClosure()); |
| 490 run_loop.Run(); |
| 491 } |
| 492 |
| 493 } // namespace content |
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