| // Copyright 2016 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "headless/public/util/http_url_fetcher.h" |
| |
| #include "net/base/io_buffer.h" |
| #include "net/cert/cert_status_flags.h" |
| #include "net/url_request/url_request.h" |
| #include "net/url_request/url_request_context.h" |
| |
| namespace headless { |
| |
| class HttpUrlFetcher::Delegate : public net::URLRequest::Delegate { |
| public: |
| Delegate(const GURL& rewritten_url, |
| const std::string& method, |
| const net::HttpRequestHeaders& request_headers, |
| const net::URLRequestContext* url_request_context, |
| ResultListener* result_listener); |
| ~Delegate() override; |
| |
| // URLRequest::Delegate methods: |
| void OnAuthRequired(net::URLRequest* request, |
| net::AuthChallengeInfo* auth_info) override; |
| void OnSSLCertificateError(net::URLRequest* request, |
| const net::SSLInfo& ssl_info, |
| bool fatal) override; |
| void OnResponseStarted(net::URLRequest* request, int net_error) override; |
| void OnReadCompleted(net::URLRequest* request, int num_bytes) override; |
| |
| private: |
| enum { kBufSize = 4096 }; |
| |
| bool ConsumeBytesRead(net::URLRequest* request, int num_bytes); |
| void ReadBody(net::URLRequest* request); |
| void OnResponseCompleted(net::URLRequest* request, int net_error); |
| |
| // Holds the error condition that was hit by the request, or OK. |
| int result_code_; |
| |
| // Buffer that URLRequest writes into. |
| scoped_refptr<net::IOBuffer> buf_; |
| |
| // The HTTP fetch. |
| std::unique_ptr<net::URLRequest> request_; |
| |
| // Holds the bytes read so far. |
| std::string bytes_read_so_far_; |
| |
| // The interface kn which to report any results. |
| ResultListener* result_listener_; // NOT OWNED. |
| }; |
| |
| HttpUrlFetcher::Delegate::Delegate( |
| const GURL& rewritten_url, |
| const std::string& method, |
| const net::HttpRequestHeaders& request_headers, |
| const net::URLRequestContext* url_request_context, |
| ResultListener* result_listener) |
| : result_code_(net::OK), |
| buf_(new net::IOBuffer(kBufSize)), |
| request_(url_request_context->CreateRequest(rewritten_url, |
| net::DEFAULT_PRIORITY, |
| this)), |
| result_listener_(result_listener) { |
| request_->set_method(method); |
| request_->SetExtraRequestHeaders(request_headers); |
| request_->Start(); |
| } |
| |
| HttpUrlFetcher::Delegate::~Delegate() {} |
| |
| void HttpUrlFetcher::Delegate::OnAuthRequired( |
| net::URLRequest* request, |
| net::AuthChallengeInfo* auth_info) { |
| DCHECK_EQ(request, request_.get()); |
| LOG(WARNING) << "Auth required to fetch URL, aborting."; |
| result_code_ = net::ERR_NOT_IMPLEMENTED; |
| request->CancelAuth(); |
| } |
| |
| void HttpUrlFetcher::Delegate::OnSSLCertificateError( |
| net::URLRequest* request, |
| const net::SSLInfo& ssl_info, |
| bool fatal) { |
| DCHECK_EQ(request, request_.get()); |
| |
| // Revocation check failures are not fatal. |
| if (net::IsCertStatusMinorError(ssl_info.cert_status)) { |
| request->ContinueDespiteLastError(); |
| return; |
| } |
| LOG(WARNING) << "SSL certificate error, aborting."; |
| |
| // Certificate errors are in same space as net errors. |
| result_code_ = net::MapCertStatusToNetError(ssl_info.cert_status); |
| request->Cancel(); |
| } |
| |
| void HttpUrlFetcher::Delegate::OnResponseStarted(net::URLRequest* request, |
| int net_error) { |
| DCHECK_EQ(request, request_.get()); |
| DCHECK_NE(net::ERR_IO_PENDING, net_error); |
| |
| if (net_error != net::OK) { |
| OnResponseCompleted(request, net_error); |
| return; |
| } |
| |
| ReadBody(request); |
| } |
| |
| void HttpUrlFetcher::Delegate::OnReadCompleted(net::URLRequest* request, |
| int num_bytes) { |
| DCHECK_EQ(request, request_.get()); |
| DCHECK_NE(net::ERR_IO_PENDING, num_bytes); |
| |
| if (ConsumeBytesRead(request, num_bytes)) { |
| // Keep reading. |
| ReadBody(request); |
| } |
| } |
| |
| void HttpUrlFetcher::Delegate::ReadBody(net::URLRequest* request) { |
| // Read as many bytes as are available synchronously. |
| while (true) { |
| int num_bytes = request->Read(buf_.get(), kBufSize); |
| if (num_bytes == net::ERR_IO_PENDING) |
| return; |
| |
| if (num_bytes < 0) { |
| OnResponseCompleted(request, num_bytes); |
| return; |
| } |
| |
| if (!ConsumeBytesRead(request, num_bytes)) |
| return; |
| } |
| } |
| |
| bool HttpUrlFetcher::Delegate::ConsumeBytesRead(net::URLRequest* request, |
| int num_bytes) { |
| if (num_bytes <= 0) { |
| // Error while reading, or EOF. |
| OnResponseCompleted(request, num_bytes); |
| return false; |
| } |
| |
| bytes_read_so_far_.append(buf_->data(), num_bytes); |
| return true; |
| } |
| |
| void HttpUrlFetcher::Delegate::OnResponseCompleted(net::URLRequest* request, |
| int net_error) { |
| DCHECK_EQ(request, request_.get()); |
| |
| if (result_code_ != net::OK) { |
| result_listener_->OnFetchStartError(static_cast<net::Error>(result_code_)); |
| return; |
| } |
| |
| if (net_error != net::OK) { |
| result_listener_->OnFetchStartError(static_cast<net::Error>(net_error)); |
| return; |
| } |
| |
| result_listener_->OnFetchCompleteExtractHeaders( |
| request->url(), request->GetResponseCode(), bytes_read_so_far_.c_str(), |
| bytes_read_so_far_.size()); |
| } |
| |
| HttpUrlFetcher::HttpUrlFetcher( |
| const net::URLRequestContext* url_request_context) |
| : url_request_context_(url_request_context) {} |
| |
| HttpUrlFetcher::~HttpUrlFetcher() {} |
| |
| void HttpUrlFetcher::StartFetch(const GURL& rewritten_url, |
| const std::string& method, |
| const net::HttpRequestHeaders& request_headers, |
| ResultListener* result_listener) { |
| delagate_.reset(new Delegate(rewritten_url, method, request_headers, |
| url_request_context_, result_listener)); |
| } |
| |
| } // namespace headless |