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| 1 // Copyright 2017 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/browser/devtools/devtools_url_interceptor_request_job.h" |
| 6 |
| 7 #include "base/memory/ptr_util.h" |
| 8 #include "base/strings/stringprintf.h" |
| 9 #include "content/browser/devtools/protocol/network_handler.h" |
| 10 #include "net/base/elements_upload_data_stream.h" |
| 11 #include "net/base/io_buffer.h" |
| 12 #include "net/base/upload_bytes_element_reader.h" |
| 13 #include "net/base/upload_element_reader.h" |
| 14 #include "net/cert/cert_status_flags.h" |
| 15 #include "net/http/http_response_headers.h" |
| 16 #include "net/http/http_util.h" |
| 17 #include "net/url_request/url_request_context.h" |
| 18 |
| 19 namespace content { |
| 20 |
| 21 using CommandStatus = DevToolsURLRequestInterceptor::CommandStatus; |
| 22 |
| 23 namespace { |
| 24 void SendRequestInterceptedEventOnUiThread( |
| 25 base::WeakPtr<protocol::NetworkHandler> network_handler, |
| 26 std::string interception_id, |
| 27 std::unique_ptr<protocol::Network::Request> network_request) { |
| 28 DCHECK_CURRENTLY_ON(BrowserThread::UI); |
| 29 if (!network_handler) |
| 30 return; |
| 31 network_handler->frontend()->RequestIntercepted(interception_id, |
| 32 std::move(network_request)); |
| 33 } |
| 34 |
| 35 void SendRedirectInterceptedEventOnUiThread( |
| 36 base::WeakPtr<protocol::NetworkHandler> network_handler, |
| 37 std::string interception_id, |
| 38 std::unique_ptr<protocol::Network::Request> network_request, |
| 39 std::unique_ptr<protocol::Object> headers_object, |
| 40 int http_status_code, |
| 41 std::string redirect_url) { |
| 42 DCHECK_CURRENTLY_ON(BrowserThread::UI); |
| 43 if (!network_handler) |
| 44 return; |
| 45 return network_handler->frontend()->RequestIntercepted( |
| 46 interception_id, std::move(network_request), std::move(headers_object), |
| 47 http_status_code, redirect_url); |
| 48 } |
| 49 |
| 50 class ProxyUploadElementReader : public net::UploadElementReader { |
| 51 public: |
| 52 explicit ProxyUploadElementReader(net::UploadElementReader* reader) |
| 53 : reader_(reader) {} |
| 54 |
| 55 ~ProxyUploadElementReader() override {} |
| 56 |
| 57 // net::UploadElementReader overrides: |
| 58 int Init(const net::CompletionCallback& callback) override { |
| 59 return reader_->Init(callback); |
| 60 } |
| 61 |
| 62 uint64_t GetContentLength() const override { |
| 63 return reader_->GetContentLength(); |
| 64 } |
| 65 |
| 66 uint64_t BytesRemaining() const override { return reader_->BytesRemaining(); } |
| 67 |
| 68 bool IsInMemory() const override { return reader_->IsInMemory(); } |
| 69 |
| 70 int Read(net::IOBuffer* buf, |
| 71 int buf_length, |
| 72 const net::CompletionCallback& callback) override { |
| 73 return reader_->Read(buf, buf_length, callback); |
| 74 } |
| 75 |
| 76 private: |
| 77 net::UploadElementReader* reader_; // NOT OWNED |
| 78 |
| 79 DISALLOW_COPY_AND_ASSIGN(ProxyUploadElementReader); |
| 80 }; |
| 81 |
| 82 std::unique_ptr<net::UploadElementReader> GetUploadData( |
| 83 net::URLRequest* request) { |
| 84 if (!request->has_upload()) |
| 85 return nullptr; |
| 86 |
| 87 const net::UploadDataStream* stream = request->get_upload(); |
| 88 if (!stream->GetElementReaders()) |
| 89 return nullptr; |
| 90 |
| 91 DCHECK_EQ(1u, stream->GetElementReaders()->size()); |
| 92 return base::MakeUnique<ProxyUploadElementReader>( |
| 93 (*stream->GetElementReaders())[0].get()); |
| 94 } |
| 95 } // namespace |
| 96 |
| 97 DevToolsURLInterceptorRequestJob::DevToolsURLInterceptorRequestJob( |
| 98 scoped_refptr<DevToolsURLRequestInterceptor::State> |
| 99 devtools_url_request_interceptor_state, |
| 100 const std::string& interception_id, |
| 101 net::URLRequest* original_request, |
| 102 net::NetworkDelegate* original_network_delegate, |
| 103 WebContents* web_contents, |
| 104 base::WeakPtr<protocol::NetworkHandler> network_handler, |
| 105 bool is_redirect) |
| 106 : net::URLRequestJob(original_request, original_network_delegate), |
| 107 devtools_url_request_interceptor_state_( |
| 108 devtools_url_request_interceptor_state), |
| 109 request_details_(original_request->url(), |
| 110 original_request->method(), |
| 111 GetUploadData(original_request), |
| 112 original_request->extra_request_headers(), |
| 113 original_request->priority(), |
| 114 original_request->context()), |
| 115 waiting_for_user_response_(false), |
| 116 intercepting_requests_(true), |
| 117 interception_id_(interception_id), |
| 118 web_contents_(web_contents), |
| 119 network_handler_(network_handler), |
| 120 is_redirect_(is_redirect), |
| 121 weak_ptr_factory_(this) { |
| 122 DCHECK_CURRENTLY_ON(BrowserThread::IO); |
| 123 } |
| 124 |
| 125 DevToolsURLInterceptorRequestJob::~DevToolsURLInterceptorRequestJob() { |
| 126 DCHECK_CURRENTLY_ON(BrowserThread::IO); |
| 127 devtools_url_request_interceptor_state_->JobFinished(interception_id_); |
| 128 } |
| 129 |
| 130 // net::URLRequestJob implementation: |
| 131 void DevToolsURLInterceptorRequestJob::SetExtraRequestHeaders( |
| 132 const net::HttpRequestHeaders& headers) { |
| 133 request_details_.extra_request_headers = headers; |
| 134 } |
| 135 |
| 136 void DevToolsURLInterceptorRequestJob::Start() { |
| 137 DCHECK_CURRENTLY_ON(BrowserThread::IO); |
| 138 if (is_redirect_ || !intercepting_requests_) { |
| 139 // If this is a fetch in response to a redirect, we have already sent the |
| 140 // Network.requestIntercepted event and the user opted to allow it so |
| 141 // there's no need to send another. We can just start the SubRequest. |
| 142 // If we're not intercepting results we can also just start the SubRequest. |
| 143 sub_request_.reset(new SubRequest(request_details_, this, |
| 144 devtools_url_request_interceptor_state_)); |
| 145 } else { |
| 146 waiting_for_user_response_ = true; |
| 147 std::unique_ptr<protocol::Network::Request> network_request = |
| 148 protocol::NetworkHandler::CreateRequestFromURLRequest(request()); |
| 149 BrowserThread::PostTask( |
| 150 BrowserThread::UI, FROM_HERE, |
| 151 base::Bind(SendRequestInterceptedEventOnUiThread, network_handler_, |
| 152 interception_id_, base::Passed(&network_request))); |
| 153 } |
| 154 } |
| 155 |
| 156 void DevToolsURLInterceptorRequestJob::Kill() { |
| 157 if (sub_request_) |
| 158 sub_request_->Cancel(); |
| 159 |
| 160 URLRequestJob::Kill(); |
| 161 } |
| 162 |
| 163 int DevToolsURLInterceptorRequestJob::ReadRawData(net::IOBuffer* buf, |
| 164 int buf_size) { |
| 165 if (sub_request_) { |
| 166 int size = sub_request_->request()->Read(buf, buf_size); |
| 167 return size; |
| 168 } else { |
| 169 CHECK(mock_response_details_); |
| 170 return mock_response_details_->ReadRawData(buf, buf_size); |
| 171 } |
| 172 } |
| 173 |
| 174 int DevToolsURLInterceptorRequestJob::GetResponseCode() const { |
| 175 if (sub_request_) { |
| 176 return sub_request_->request()->GetResponseCode(); |
| 177 } else { |
| 178 CHECK(mock_response_details_); |
| 179 return mock_response_details_->response_headers()->response_code(); |
| 180 } |
| 181 } |
| 182 |
| 183 void DevToolsURLInterceptorRequestJob::GetResponseInfo( |
| 184 net::HttpResponseInfo* info) { |
| 185 // NOTE this can get called during URLRequestJob::NotifyStartError in which |
| 186 // case we might not have either a sub request or a mock response. |
| 187 if (sub_request_) { |
| 188 *info = sub_request_->request()->response_info(); |
| 189 } else if (mock_response_details_) { |
| 190 info->headers = mock_response_details_->response_headers(); |
| 191 } |
| 192 } |
| 193 |
| 194 const net::HttpResponseHeaders* |
| 195 DevToolsURLInterceptorRequestJob::GetHttpResponseHeaders() const { |
| 196 if (sub_request_) { |
| 197 net::URLRequest* request = sub_request_->request(); |
| 198 return request->response_info().headers.get(); |
| 199 } |
| 200 CHECK(mock_response_details_); |
| 201 return mock_response_details_->response_headers().get(); |
| 202 } |
| 203 |
| 204 bool DevToolsURLInterceptorRequestJob::GetMimeType( |
| 205 std::string* mime_type) const { |
| 206 const net::HttpResponseHeaders* response_headers = GetHttpResponseHeaders(); |
| 207 if (!response_headers) |
| 208 return false; |
| 209 return response_headers->GetMimeType(mime_type); |
| 210 } |
| 211 |
| 212 bool DevToolsURLInterceptorRequestJob::GetCharset(std::string* charset) { |
| 213 const net::HttpResponseHeaders* response_headers = GetHttpResponseHeaders(); |
| 214 if (!response_headers) |
| 215 return false; |
| 216 return response_headers->GetCharset(charset); |
| 217 } |
| 218 |
| 219 void DevToolsURLInterceptorRequestJob::GetLoadTimingInfo( |
| 220 net::LoadTimingInfo* load_timing_info) const { |
| 221 if (sub_request_) { |
| 222 sub_request_->request()->GetLoadTimingInfo(load_timing_info); |
| 223 } else { |
| 224 CHECK(mock_response_details_); |
| 225 // Since this request is mocked most of the fields are irrelevant. |
| 226 load_timing_info->receive_headers_end = |
| 227 mock_response_details_->response_time(); |
| 228 } |
| 229 } |
| 230 |
| 231 void DevToolsURLInterceptorRequestJob::OnAuthRequired( |
| 232 net::URLRequest* request, |
| 233 net::AuthChallengeInfo* auth_info) { |
| 234 // This shouldn't get called because the actual network fetch is done by the |
| 235 // SubRequest. |
| 236 NOTREACHED(); |
| 237 } |
| 238 |
| 239 void DevToolsURLInterceptorRequestJob::OnCertificateRequested( |
| 240 net::URLRequest* request, |
| 241 net::SSLCertRequestInfo* cert_request_info) { |
| 242 // This shouldn't get called because the actual network fetch is done by the |
| 243 // SubRequest. |
| 244 NOTREACHED(); |
| 245 } |
| 246 |
| 247 void DevToolsURLInterceptorRequestJob::OnSSLCertificateError( |
| 248 net::URLRequest* request, |
| 249 const net::SSLInfo& ssl_info, |
| 250 bool fatal) { |
| 251 // This shouldn't get called because the actual network fetch is done by the |
| 252 // SubRequest. |
| 253 NOTREACHED(); |
| 254 } |
| 255 |
| 256 void DevToolsURLInterceptorRequestJob::OnResponseStarted( |
| 257 net::URLRequest* request, |
| 258 int net_error) { |
| 259 DCHECK_CURRENTLY_ON(BrowserThread::IO); |
| 260 DCHECK(sub_request_); |
| 261 DCHECK_EQ(request, sub_request_->request()); |
| 262 DCHECK_NE(net::ERR_IO_PENDING, net_error); |
| 263 |
| 264 if (net_error != net::OK) { |
| 265 sub_request_->Cancel(); |
| 266 |
| 267 NotifyStartError(net::URLRequestStatus(net::URLRequestStatus::FAILED, |
| 268 static_cast<net::Error>(net_error))); |
| 269 return; |
| 270 } |
| 271 |
| 272 NotifyHeadersComplete(); |
| 273 } |
| 274 |
| 275 void DevToolsURLInterceptorRequestJob::OnReadCompleted(net::URLRequest* request, |
| 276 int num_bytes) { |
| 277 DCHECK_CURRENTLY_ON(BrowserThread::IO); |
| 278 DCHECK_EQ(request, sub_request_->request()); |
| 279 |
| 280 ReadRawDataComplete(num_bytes); |
| 281 } |
| 282 |
| 283 void DevToolsURLInterceptorRequestJob::OnReceivedRedirect( |
| 284 net::URLRequest* request, |
| 285 const net::RedirectInfo& redirectinfo, |
| 286 bool* defer_redirect) { |
| 287 DCHECK_CURRENTLY_ON(BrowserThread::IO); |
| 288 // If we're not intercepting results then just exit. |
| 289 if (!intercepting_requests_) { |
| 290 *defer_redirect = false; |
| 291 return; |
| 292 } |
| 293 |
| 294 // Otherwise we will need to ask what to do via DevTools protocol. |
| 295 *defer_redirect = true; |
| 296 |
| 297 size_t iter = 0; |
| 298 std::string header_name; |
| 299 std::string header_value; |
| 300 std::unique_ptr<protocol::DictionaryValue> headers_dict( |
| 301 protocol::DictionaryValue::create()); |
| 302 while (request->response_headers()->EnumerateHeaderLines(&iter, &header_name, |
| 303 &header_value)) { |
| 304 headers_dict->setString(header_name, header_value); |
| 305 } |
| 306 |
| 307 redirect_.reset(new net::RedirectInfo(redirectinfo)); |
| 308 sub_request_->Cancel(); |
| 309 sub_request_.reset(); |
| 310 |
| 311 waiting_for_user_response_ = true; |
| 312 |
| 313 std::unique_ptr<protocol::Network::Request> network_request = |
| 314 protocol::NetworkHandler::CreateRequestFromURLRequest( |
| 315 DevToolsURLInterceptorRequestJob::request()); |
| 316 std::unique_ptr<protocol::Object> headers_object = |
| 317 protocol::Object::fromValue(headers_dict.get(), nullptr); |
| 318 BrowserThread::PostTask( |
| 319 BrowserThread::UI, FROM_HERE, |
| 320 base::Bind(SendRedirectInterceptedEventOnUiThread, network_handler_, |
| 321 interception_id_, base::Passed(&network_request), |
| 322 base::Passed(&headers_object), redirectinfo.status_code, |
| 323 redirectinfo.new_url.spec())); |
| 324 } |
| 325 |
| 326 void DevToolsURLInterceptorRequestJob::StopIntercepting() { |
| 327 if (!waiting_for_user_response_) |
| 328 return; |
| 329 |
| 330 waiting_for_user_response_ = false; |
| 331 intercepting_requests_ = false; |
| 332 sub_request_.reset(new SubRequest(request_details_, this, |
| 333 devtools_url_request_interceptor_state_)); |
| 334 } |
| 335 |
| 336 CommandStatus DevToolsURLInterceptorRequestJob::ContinueInterceptedRequest( |
| 337 std::unique_ptr<DevToolsURLRequestInterceptor::Modifications> |
| 338 modifications) { |
| 339 DCHECK_CURRENTLY_ON(BrowserThread::IO); |
| 340 if (!waiting_for_user_response_) |
| 341 return CommandStatus::CommandAlreadyProcessed; |
| 342 waiting_for_user_response_ = false; |
| 343 |
| 344 if (modifications->error_reason) { |
| 345 NotifyStartError(net::URLRequestStatus(net::URLRequestStatus::FAILED, |
| 346 *modifications->error_reason)); |
| 347 return CommandStatus::OK; |
| 348 } |
| 349 |
| 350 if (modifications->raw_response) { |
| 351 mock_response_details_.reset(new MockResponseDetails( |
| 352 std::move(*modifications->raw_response), base::TimeTicks::Now())); |
| 353 |
| 354 std::string value; |
| 355 if (mock_response_details_->response_headers()->IsRedirect(&value)) { |
| 356 devtools_url_request_interceptor_state_->ExpectRequestAfterRedirect( |
| 357 request(), interception_id_); |
| 358 } |
| 359 NotifyHeadersComplete(); |
| 360 return CommandStatus::OK; |
| 361 } |
| 362 |
| 363 if (redirect_) { |
| 364 // NOTE we don't append the text form of the status code because |
| 365 // net::HttpResponseHeaders doesn't need that. |
| 366 std::string raw_headers = |
| 367 base::StringPrintf("HTTP/1.1 %d", redirect_->status_code); |
| 368 raw_headers.append(1, '\0'); |
| 369 raw_headers.append("Location: "); |
| 370 raw_headers.append( |
| 371 modifications->modified_url.fromMaybe(redirect_->new_url.spec())); |
| 372 raw_headers.append(2, '\0'); |
| 373 mock_response_details_.reset(new MockResponseDetails( |
| 374 make_scoped_refptr(new net::HttpResponseHeaders(raw_headers)), "", 0, |
| 375 base::TimeTicks::Now())); |
| 376 redirect_.reset(); |
| 377 |
| 378 devtools_url_request_interceptor_state_->ExpectRequestAfterRedirect( |
| 379 request(), interception_id_); |
| 380 NotifyHeadersComplete(); |
| 381 } else { |
| 382 // Note this redirect is not visible to the caller by design. If they want a |
| 383 // visible redirect they can mock a response with a 302. |
| 384 if (modifications->modified_url.isJust()) |
| 385 request_details_.url = GURL(modifications->modified_url.fromJust()); |
| 386 |
| 387 if (modifications->modified_method.isJust()) |
| 388 request_details_.method = modifications->modified_method.fromJust(); |
| 389 |
| 390 if (modifications->modified_post_data.isJust()) { |
| 391 const std::string& post_data = |
| 392 modifications->modified_post_data.fromJust(); |
| 393 std::vector<char> data(post_data.begin(), post_data.end()); |
| 394 request_details_.post_data.reset( |
| 395 new net::UploadOwnedBytesElementReader(&data)); |
| 396 } |
| 397 |
| 398 if (modifications->modified_headers.isJust()) { |
| 399 request_details_.extra_request_headers.Clear(); |
| 400 std::unique_ptr<protocol::DictionaryValue> headers = |
| 401 modifications->modified_headers.fromJust()->toValue(); |
| 402 for (size_t i = 0; i < headers->size(); i++) { |
| 403 std::string value; |
| 404 if (headers->at(i).second->asString(&value)) { |
| 405 request_details_.extra_request_headers.SetHeader(headers->at(i).first, |
| 406 value); |
| 407 } |
| 408 } |
| 409 } |
| 410 |
| 411 // The reason we start a sub request is because we are in full control of it |
| 412 // and can choose to ignore it if, for example, the fetch encounters a |
| 413 // redirect that the user chooses to replace with a mock response. |
| 414 sub_request_.reset(new SubRequest(request_details_, this, |
| 415 devtools_url_request_interceptor_state_)); |
| 416 } |
| 417 return CommandStatus::OK; |
| 418 } |
| 419 |
| 420 DevToolsURLInterceptorRequestJob::RequestDetails::RequestDetails( |
| 421 const GURL& url, |
| 422 const std::string& method, |
| 423 std::unique_ptr<net::UploadElementReader> post_data, |
| 424 const net::HttpRequestHeaders& extra_request_headers, |
| 425 const net::RequestPriority& priority, |
| 426 const net::URLRequestContext* url_request_context) |
| 427 : url(url), |
| 428 method(method), |
| 429 post_data(std::move(post_data)), |
| 430 extra_request_headers(extra_request_headers), |
| 431 priority(priority), |
| 432 url_request_context(url_request_context) {} |
| 433 |
| 434 DevToolsURLInterceptorRequestJob::RequestDetails::~RequestDetails() {} |
| 435 |
| 436 DevToolsURLInterceptorRequestJob::SubRequest::SubRequest( |
| 437 DevToolsURLInterceptorRequestJob::RequestDetails& request_details, |
| 438 DevToolsURLInterceptorRequestJob* devtools_interceptor_request_job, |
| 439 scoped_refptr<DevToolsURLRequestInterceptor::State> |
| 440 devtools_url_request_interceptor_state) |
| 441 : devtools_interceptor_request_job_(devtools_interceptor_request_job), |
| 442 devtools_url_request_interceptor_state_( |
| 443 devtools_url_request_interceptor_state), |
| 444 fetch_in_progress_(true) { |
| 445 DCHECK_CURRENTLY_ON(BrowserThread::IO); |
| 446 request_ = request_details.url_request_context->CreateRequest( |
| 447 request_details.url, request_details.priority, |
| 448 devtools_interceptor_request_job_), |
| 449 request_->set_method(request_details.method); |
| 450 request_->SetExtraRequestHeaders(request_details.extra_request_headers); |
| 451 |
| 452 if (request_details.post_data) { |
| 453 request_->set_upload(net::ElementsUploadDataStream::CreateWithReader( |
| 454 std::move(request_details.post_data), 0)); |
| 455 } |
| 456 |
| 457 devtools_url_request_interceptor_state_->RegisterSubRequest(request_.get()); |
| 458 request_->Start(); |
| 459 } |
| 460 |
| 461 DevToolsURLInterceptorRequestJob::SubRequest::~SubRequest() { |
| 462 DCHECK_CURRENTLY_ON(BrowserThread::IO); |
| 463 devtools_url_request_interceptor_state_->UnregisterSubRequest(request_.get()); |
| 464 } |
| 465 |
| 466 void DevToolsURLInterceptorRequestJob::SubRequest::Cancel() { |
| 467 DCHECK_CURRENTLY_ON(BrowserThread::IO); |
| 468 if (!fetch_in_progress_) |
| 469 return; |
| 470 |
| 471 fetch_in_progress_ = false; |
| 472 request_->Cancel(); |
| 473 } |
| 474 |
| 475 DevToolsURLInterceptorRequestJob::MockResponseDetails::MockResponseDetails( |
| 476 std::string response_bytes, |
| 477 base::TimeTicks response_time) |
| 478 : response_bytes_(std::move(response_bytes)), |
| 479 read_offset_(0), |
| 480 response_time_(response_time) { |
| 481 int header_size = net::HttpUtil::LocateEndOfHeaders(response_bytes_.c_str(), |
| 482 response_bytes_.size()); |
| 483 if (header_size == -1) { |
| 484 LOG(WARNING) << "Can't find headers in result"; |
| 485 response_headers_ = new net::HttpResponseHeaders(""); |
| 486 } else { |
| 487 response_headers_ = |
| 488 new net::HttpResponseHeaders(net::HttpUtil::AssembleRawHeaders( |
| 489 response_bytes_.c_str(), header_size)); |
| 490 read_offset_ = header_size; |
| 491 } |
| 492 |
| 493 CHECK_LE(read_offset_, response_bytes_.size()); |
| 494 } |
| 495 |
| 496 DevToolsURLInterceptorRequestJob::MockResponseDetails::MockResponseDetails( |
| 497 const scoped_refptr<net::HttpResponseHeaders>& response_headers, |
| 498 std::string response_bytes, |
| 499 size_t read_offset, |
| 500 base::TimeTicks response_time) |
| 501 : response_headers_(response_headers), |
| 502 response_bytes_(std::move(response_bytes)), |
| 503 read_offset_(read_offset), |
| 504 response_time_(response_time) {} |
| 505 |
| 506 DevToolsURLInterceptorRequestJob::MockResponseDetails::~MockResponseDetails() {} |
| 507 |
| 508 int DevToolsURLInterceptorRequestJob::MockResponseDetails::ReadRawData( |
| 509 net::IOBuffer* buf, |
| 510 int buf_size) { |
| 511 size_t bytes_available = response_bytes_.size() - read_offset_; |
| 512 size_t bytes_to_copy = |
| 513 std::min(static_cast<size_t>(buf_size), bytes_available); |
| 514 if (bytes_to_copy > 0) { |
| 515 std::memcpy(buf->data(), &response_bytes_.data()[read_offset_], |
| 516 bytes_to_copy); |
| 517 read_offset_ += bytes_to_copy; |
| 518 } |
| 519 return bytes_to_copy; |
| 520 } |
| 521 |
| 522 } // namespace content |
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