OLD | NEW |
(Empty) | |
| 1 // Copyright 2016 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 "headless/public/util/http_url_fetcher.h" |
| 6 |
| 7 #include "net/base/io_buffer.h" |
| 8 #include "net/cert/cert_status_flags.h" |
| 9 #include "net/url_request/url_request.h" |
| 10 #include "net/url_request/url_request_context.h" |
| 11 |
| 12 namespace headless { |
| 13 |
| 14 class HttpUrlFetcher::Delegate : public net::URLRequest::Delegate { |
| 15 public: |
| 16 Delegate(const GURL& rewritten_url, |
| 17 const std::string& method, |
| 18 const net::HttpRequestHeaders& request_headers, |
| 19 const net::URLRequestContext* url_request_context, |
| 20 ResultListener* result_listener); |
| 21 ~Delegate() override; |
| 22 |
| 23 // URLRequest::Delegate methods: |
| 24 void OnAuthRequired(net::URLRequest* request, |
| 25 net::AuthChallengeInfo* auth_info) override; |
| 26 void OnSSLCertificateError(net::URLRequest* request, |
| 27 const net::SSLInfo& ssl_info, |
| 28 bool fatal) override; |
| 29 void OnResponseStarted(net::URLRequest* request, int net_error) override; |
| 30 void OnReadCompleted(net::URLRequest* request, int num_bytes) override; |
| 31 |
| 32 private: |
| 33 enum { kBufSize = 4096 }; |
| 34 |
| 35 bool ConsumeBytesRead(net::URLRequest* request, int num_bytes); |
| 36 void ReadBody(net::URLRequest* request); |
| 37 void OnResponseCompleted(net::URLRequest* request, int net_error); |
| 38 |
| 39 // Holds the error condition that was hit by the request, or OK. |
| 40 int result_code_; |
| 41 |
| 42 // Buffer that URLRequest writes into. |
| 43 scoped_refptr<net::IOBuffer> buf_; |
| 44 |
| 45 // The HTTP fetch. |
| 46 std::unique_ptr<net::URLRequest> request_; |
| 47 |
| 48 // Holds the bytes read so far. |
| 49 std::string bytes_read_so_far_; |
| 50 |
| 51 // The interface kn which to report any results. |
| 52 ResultListener* result_listener_; // NOT OWNED. |
| 53 }; |
| 54 |
| 55 HttpUrlFetcher::Delegate::Delegate( |
| 56 const GURL& rewritten_url, |
| 57 const std::string& method, |
| 58 const net::HttpRequestHeaders& request_headers, |
| 59 const net::URLRequestContext* url_request_context, |
| 60 ResultListener* result_listener) |
| 61 : result_code_(net::OK), |
| 62 buf_(new net::IOBuffer(kBufSize)), |
| 63 request_(url_request_context->CreateRequest(rewritten_url, |
| 64 net::DEFAULT_PRIORITY, |
| 65 this)), |
| 66 result_listener_(result_listener) { |
| 67 request_->set_method(method); |
| 68 request_->SetExtraRequestHeaders(request_headers); |
| 69 request_->Start(); |
| 70 } |
| 71 |
| 72 HttpUrlFetcher::Delegate::~Delegate() {} |
| 73 |
| 74 void HttpUrlFetcher::Delegate::OnAuthRequired( |
| 75 net::URLRequest* request, |
| 76 net::AuthChallengeInfo* auth_info) { |
| 77 DCHECK_EQ(request, request_.get()); |
| 78 LOG(WARNING) << "Auth required to fetch URL, aborting."; |
| 79 result_code_ = net::ERR_NOT_IMPLEMENTED; |
| 80 request->CancelAuth(); |
| 81 } |
| 82 |
| 83 void HttpUrlFetcher::Delegate::OnSSLCertificateError( |
| 84 net::URLRequest* request, |
| 85 const net::SSLInfo& ssl_info, |
| 86 bool fatal) { |
| 87 DCHECK_EQ(request, request_.get()); |
| 88 |
| 89 // Revocation check failures are not fatal. |
| 90 if (net::IsCertStatusMinorError(ssl_info.cert_status)) { |
| 91 request->ContinueDespiteLastError(); |
| 92 return; |
| 93 } |
| 94 LOG(WARNING) << "SSL certificate error, aborting."; |
| 95 |
| 96 // Certificate errors are in same space as net errors. |
| 97 result_code_ = net::MapCertStatusToNetError(ssl_info.cert_status); |
| 98 request->Cancel(); |
| 99 } |
| 100 |
| 101 void HttpUrlFetcher::Delegate::OnResponseStarted(net::URLRequest* request, |
| 102 int net_error) { |
| 103 DCHECK_EQ(request, request_.get()); |
| 104 DCHECK_NE(net::ERR_IO_PENDING, net_error); |
| 105 |
| 106 if (net_error != net::OK) { |
| 107 OnResponseCompleted(request, net_error); |
| 108 return; |
| 109 } |
| 110 |
| 111 ReadBody(request); |
| 112 } |
| 113 |
| 114 void HttpUrlFetcher::Delegate::OnReadCompleted(net::URLRequest* request, |
| 115 int num_bytes) { |
| 116 DCHECK_EQ(request, request_.get()); |
| 117 DCHECK_NE(net::ERR_IO_PENDING, num_bytes); |
| 118 |
| 119 if (ConsumeBytesRead(request, num_bytes)) { |
| 120 // Keep reading. |
| 121 ReadBody(request); |
| 122 } |
| 123 } |
| 124 |
| 125 void HttpUrlFetcher::Delegate::ReadBody(net::URLRequest* request) { |
| 126 // Read as many bytes as are available synchronously. |
| 127 while (true) { |
| 128 int num_bytes = request->Read(buf_.get(), kBufSize); |
| 129 if (num_bytes == net::ERR_IO_PENDING) |
| 130 return; |
| 131 |
| 132 if (num_bytes < 0) { |
| 133 OnResponseCompleted(request, num_bytes); |
| 134 return; |
| 135 } |
| 136 |
| 137 if (!ConsumeBytesRead(request, num_bytes)) |
| 138 return; |
| 139 } |
| 140 } |
| 141 |
| 142 bool HttpUrlFetcher::Delegate::ConsumeBytesRead(net::URLRequest* request, |
| 143 int num_bytes) { |
| 144 if (num_bytes <= 0) { |
| 145 // Error while reading, or EOF. |
| 146 OnResponseCompleted(request, num_bytes); |
| 147 return false; |
| 148 } |
| 149 |
| 150 bytes_read_so_far_.append(buf_->data(), num_bytes); |
| 151 return true; |
| 152 } |
| 153 |
| 154 void HttpUrlFetcher::Delegate::OnResponseCompleted(net::URLRequest* request, |
| 155 int net_error) { |
| 156 DCHECK_EQ(request, request_.get()); |
| 157 |
| 158 if (result_code_ != net::OK) { |
| 159 result_listener_->OnFetchStartError(static_cast<net::Error>(result_code_)); |
| 160 return; |
| 161 } |
| 162 |
| 163 if (net_error != net::OK) { |
| 164 result_listener_->OnFetchStartError(static_cast<net::Error>(net_error)); |
| 165 return; |
| 166 } |
| 167 |
| 168 result_listener_->OnFetchCompleteExtractHeaders( |
| 169 request->url(), request->GetResponseCode(), bytes_read_so_far_.c_str(), |
| 170 bytes_read_so_far_.size()); |
| 171 } |
| 172 |
| 173 HttpUrlFetcher::HttpUrlFetcher( |
| 174 const net::URLRequestContext* url_request_context) |
| 175 : url_request_context_(url_request_context) {} |
| 176 |
| 177 HttpUrlFetcher::~HttpUrlFetcher() {} |
| 178 |
| 179 void HttpUrlFetcher::StartFetch(const GURL& rewritten_url, |
| 180 const std::string& method, |
| 181 const net::HttpRequestHeaders& request_headers, |
| 182 ResultListener* result_listener) { |
| 183 delagate_.reset(new Delegate(rewritten_url, method, request_headers, |
| 184 url_request_context_, result_listener)); |
| 185 } |
| 186 |
| 187 } // namespace headless |
OLD | NEW |