172a454cd3513ac24fbdd0e0cb9ad70b86a99b801Kristian Monsen// Copyright (c) 2011 The Chromium Authors. All rights reserved. 2c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch// Use of this source code is governed by a BSD-style license that can be 3c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch// found in the LICENSE file. 4c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 5731df977c0511bca2206b5f333555b1205ff1f43Iain Merrick#include "net/proxy/proxy_script_fetcher_impl.h" 6c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 7c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott#include "base/compiler_specific.h" 8c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott#include "base/i18n/icu_string_conversions.h" 9c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott#include "base/logging.h" 10c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott#include "base/message_loop.h" 11c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott#include "base/string_util.h" 12dc0f95d653279beabeb9817299e2902918ba123eKristian Monsen#include "net/base/data_url.h" 13c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott#include "net/base/io_buffer.h" 14c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott#include "net/base/load_flags.h" 15c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott#include "net/base/net_errors.h" 16c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott#include "net/http/http_response_headers.h" 17731df977c0511bca2206b5f333555b1205ff1f43Iain Merrick#include "net/url_request/url_request_context.h" 18c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 19c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott// TODO(eroman): 20ddb351dbec246cf1fab5ec20d2d5520909041de1Kristian Monsen// - Support auth-prompts (http://crbug.com/77366) 21c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 22c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scottnamespace net { 23c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 24c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scottnamespace { 25c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 26c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott// The maximum size (in bytes) allowed for a PAC script. Responses exceeding 27c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott// this will fail with ERR_FILE_TOO_BIG. 28731df977c0511bca2206b5f333555b1205ff1f43Iain Merrickconst int kDefaultMaxResponseBytes = 1048576; // 1 megabyte 29c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 30c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott// The maximum duration (in milliseconds) allowed for fetching the PAC script. 31c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott// Responses exceeding this will fail with ERR_TIMED_OUT. 32731df977c0511bca2206b5f333555b1205ff1f43Iain Merrickconst int kDefaultMaxDurationMs = 300000; // 5 minutes 33c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 34c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott// Returns true if |mime_type| is one of the known PAC mime type. 35c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scottbool IsPacMimeType(const std::string& mime_type) { 36c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott static const char * const kSupportedPacMimeTypes[] = { 37c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott "application/x-ns-proxy-autoconfig", 38c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott "application/x-javascript-config", 39c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott }; 40c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott for (size_t i = 0; i < arraysize(kSupportedPacMimeTypes); ++i) { 41c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (LowerCaseEqualsASCII(mime_type, kSupportedPacMimeTypes[i])) 42c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott return true; 43c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott } 44c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott return false; 45c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott} 46c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 47c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch// Converts |bytes| (which is encoded by |charset|) to UTF16, saving the resul 48c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch// to |*utf16|. 49c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott// If |charset| is empty, then we don't know what it was and guess. 50c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdochvoid ConvertResponseToUTF16(const std::string& charset, 51c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch const std::string& bytes, 52c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch string16* utf16) { 53c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott const char* codepage; 54c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 55c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (charset.empty()) { 56c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott // Assume ISO-8859-1 if no charset was specified. 57c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott codepage = base::kCodepageLatin1; 58c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott } else { 59c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott // Otherwise trust the charset that was provided. 60c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott codepage = charset.c_str(); 61c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott } 62c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 63c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott // We will be generous in the conversion -- if any characters lie 64c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott // outside of |charset| (i.e. invalid), then substitute them with 65c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott // U+FFFD rather than failing. 66c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch base::CodepageToUTF16(bytes, codepage, 67c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch base::OnStringConversionError::SUBSTITUTE, 68c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch utf16); 69c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott} 70c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 71c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott} // namespace 72c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 73c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick ScottProxyScriptFetcherImpl::ProxyScriptFetcherImpl( 74c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott URLRequestContext* url_request_context) 75c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott : ALLOW_THIS_IN_INITIALIZER_LIST(task_factory_(this)), 76c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott url_request_context_(url_request_context), 7772a454cd3513ac24fbdd0e0cb9ad70b86a99b801Kristian Monsen buf_(new IOBuffer(kBufSize)), 78c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott next_id_(0), 79c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott cur_request_(NULL), 80c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott cur_request_id_(0), 81c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott callback_(NULL), 82c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott result_code_(OK), 83731df977c0511bca2206b5f333555b1205ff1f43Iain Merrick result_text_(NULL), 84731df977c0511bca2206b5f333555b1205ff1f43Iain Merrick max_response_bytes_(kDefaultMaxResponseBytes), 85731df977c0511bca2206b5f333555b1205ff1f43Iain Merrick max_duration_(base::TimeDelta::FromMilliseconds(kDefaultMaxDurationMs)) { 86c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott DCHECK(url_request_context); 87c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott} 88c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 89c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick ScottProxyScriptFetcherImpl::~ProxyScriptFetcherImpl() { 9072a454cd3513ac24fbdd0e0cb9ad70b86a99b801Kristian Monsen // The URLRequest's destructor will cancel the outstanding request, and 91c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott // ensure that the delegate (this) is not called again. 92c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott} 93c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 9472a454cd3513ac24fbdd0e0cb9ad70b86a99b801Kristian Monsenbase::TimeDelta ProxyScriptFetcherImpl::SetTimeoutConstraint( 9572a454cd3513ac24fbdd0e0cb9ad70b86a99b801Kristian Monsen base::TimeDelta timeout) { 9672a454cd3513ac24fbdd0e0cb9ad70b86a99b801Kristian Monsen base::TimeDelta prev = max_duration_; 9772a454cd3513ac24fbdd0e0cb9ad70b86a99b801Kristian Monsen max_duration_ = timeout; 9872a454cd3513ac24fbdd0e0cb9ad70b86a99b801Kristian Monsen return prev; 9972a454cd3513ac24fbdd0e0cb9ad70b86a99b801Kristian Monsen} 10072a454cd3513ac24fbdd0e0cb9ad70b86a99b801Kristian Monsen 10172a454cd3513ac24fbdd0e0cb9ad70b86a99b801Kristian Monsensize_t ProxyScriptFetcherImpl::SetSizeConstraint(size_t size_bytes) { 10272a454cd3513ac24fbdd0e0cb9ad70b86a99b801Kristian Monsen size_t prev = max_response_bytes_; 10372a454cd3513ac24fbdd0e0cb9ad70b86a99b801Kristian Monsen max_response_bytes_ = size_bytes; 10472a454cd3513ac24fbdd0e0cb9ad70b86a99b801Kristian Monsen return prev; 10572a454cd3513ac24fbdd0e0cb9ad70b86a99b801Kristian Monsen} 10672a454cd3513ac24fbdd0e0cb9ad70b86a99b801Kristian Monsen 10772a454cd3513ac24fbdd0e0cb9ad70b86a99b801Kristian Monsenvoid ProxyScriptFetcherImpl::OnResponseCompleted(URLRequest* request) { 10872a454cd3513ac24fbdd0e0cb9ad70b86a99b801Kristian Monsen DCHECK_EQ(request, cur_request_.get()); 10972a454cd3513ac24fbdd0e0cb9ad70b86a99b801Kristian Monsen 11072a454cd3513ac24fbdd0e0cb9ad70b86a99b801Kristian Monsen // Use |result_code_| as the request's error if we have already set it to 11172a454cd3513ac24fbdd0e0cb9ad70b86a99b801Kristian Monsen // something specific. 11272a454cd3513ac24fbdd0e0cb9ad70b86a99b801Kristian Monsen if (result_code_ == OK && !request->status().is_success()) 11372a454cd3513ac24fbdd0e0cb9ad70b86a99b801Kristian Monsen result_code_ = request->status().os_error(); 11472a454cd3513ac24fbdd0e0cb9ad70b86a99b801Kristian Monsen 11572a454cd3513ac24fbdd0e0cb9ad70b86a99b801Kristian Monsen FetchCompleted(); 11672a454cd3513ac24fbdd0e0cb9ad70b86a99b801Kristian Monsen} 11772a454cd3513ac24fbdd0e0cb9ad70b86a99b801Kristian Monsen 118c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scottint ProxyScriptFetcherImpl::Fetch(const GURL& url, 119c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch string16* text, 120c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott CompletionCallback* callback) { 121c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott // It is invalid to call Fetch() while a request is already in progress. 122c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott DCHECK(!cur_request_.get()); 123c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 124c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott DCHECK(callback); 125c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch DCHECK(text); 126c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 127dc0f95d653279beabeb9817299e2902918ba123eKristian Monsen // Handle base-64 encoded data-urls that contain custom PAC scripts. 128dc0f95d653279beabeb9817299e2902918ba123eKristian Monsen if (url.SchemeIs("data")) { 129dc0f95d653279beabeb9817299e2902918ba123eKristian Monsen std::string mime_type; 130dc0f95d653279beabeb9817299e2902918ba123eKristian Monsen std::string charset; 131dc0f95d653279beabeb9817299e2902918ba123eKristian Monsen std::string data; 132dc0f95d653279beabeb9817299e2902918ba123eKristian Monsen if (!DataURL::Parse(url, &mime_type, &charset, &data)) 133dc0f95d653279beabeb9817299e2902918ba123eKristian Monsen return ERR_FAILED; 134dc0f95d653279beabeb9817299e2902918ba123eKristian Monsen 135dc0f95d653279beabeb9817299e2902918ba123eKristian Monsen ConvertResponseToUTF16(charset, data, text); 136dc0f95d653279beabeb9817299e2902918ba123eKristian Monsen return OK; 137dc0f95d653279beabeb9817299e2902918ba123eKristian Monsen } 138dc0f95d653279beabeb9817299e2902918ba123eKristian Monsen 13972a454cd3513ac24fbdd0e0cb9ad70b86a99b801Kristian Monsen cur_request_.reset(new URLRequest(url, this)); 140c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott cur_request_->set_context(url_request_context_); 141c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott cur_request_->set_method("GET"); 142c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 143c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott // Make sure that the PAC script is downloaded using a direct connection, 144c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott // to avoid circular dependencies (fetching is a part of proxy resolution). 145c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott // Also disable the use of the disk cache. The cache is disabled so that if 146c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott // the user switches networks we don't potentially use the cached response 147c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott // from old network when we should in fact be re-fetching on the new network. 148c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott cur_request_->set_load_flags(LOAD_BYPASS_PROXY | LOAD_DISABLE_CACHE); 149c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 150c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott // Save the caller's info for notification on completion. 151c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott callback_ = callback; 152c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch result_text_ = text; 153c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch 154c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch bytes_read_so_far_.clear(); 155c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 156c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott // Post a task to timeout this request if it takes too long. 157c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott cur_request_id_ = ++next_id_; 158c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott MessageLoop::current()->PostDelayedTask(FROM_HERE, 159c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott task_factory_.NewRunnableMethod(&ProxyScriptFetcherImpl::OnTimeout, 160c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott cur_request_id_), 161731df977c0511bca2206b5f333555b1205ff1f43Iain Merrick static_cast<int>(max_duration_.InMilliseconds())); 162c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 163c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott // Start the request. 164c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott cur_request_->Start(); 165c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott return ERR_IO_PENDING; 166c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott} 167c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 168c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scottvoid ProxyScriptFetcherImpl::Cancel() { 16972a454cd3513ac24fbdd0e0cb9ad70b86a99b801Kristian Monsen // ResetCurRequestState will free the URLRequest, which will cause 170c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott // cancellation. 171c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott ResetCurRequestState(); 172c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott} 173c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 174c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick ScottURLRequestContext* ProxyScriptFetcherImpl::GetRequestContext() { 175c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott return url_request_context_; 176c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott} 177c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 17872a454cd3513ac24fbdd0e0cb9ad70b86a99b801Kristian Monsenvoid ProxyScriptFetcherImpl::OnAuthRequired(URLRequest* request, 179c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott AuthChallengeInfo* auth_info) { 180201ade2fbba22bfb27ae029f4d23fca6ded109a0Ben Murdoch DCHECK_EQ(request, cur_request_.get()); 181ddb351dbec246cf1fab5ec20d2d5520909041de1Kristian Monsen // TODO(eroman): http://crbug.com/77366 182c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott LOG(WARNING) << "Auth required to fetch PAC script, aborting."; 183c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott result_code_ = ERR_NOT_IMPLEMENTED; 184c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott request->CancelAuth(); 185c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott} 186c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 18772a454cd3513ac24fbdd0e0cb9ad70b86a99b801Kristian Monsenvoid ProxyScriptFetcherImpl::OnSSLCertificateError(URLRequest* request, 188c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott int cert_error, 189c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott X509Certificate* cert) { 190201ade2fbba22bfb27ae029f4d23fca6ded109a0Ben Murdoch DCHECK_EQ(request, cur_request_.get()); 191c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott LOG(WARNING) << "SSL certificate error when fetching PAC script, aborting."; 192c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott // Certificate errors are in same space as net errors. 193c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott result_code_ = cert_error; 194c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott request->Cancel(); 195c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott} 196c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 19772a454cd3513ac24fbdd0e0cb9ad70b86a99b801Kristian Monsenvoid ProxyScriptFetcherImpl::OnResponseStarted(URLRequest* request) { 198201ade2fbba22bfb27ae029f4d23fca6ded109a0Ben Murdoch DCHECK_EQ(request, cur_request_.get()); 199c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 200c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (!request->status().is_success()) { 201c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott OnResponseCompleted(request); 202c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott return; 203c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott } 204c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 205c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott // Require HTTP responses to have a success status code. 206c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (request->url().SchemeIs("http") || request->url().SchemeIs("https")) { 207c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott // NOTE about status codes: We are like Firefox 3 in this respect. 208c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott // {IE 7, Safari 3, Opera 9.5} do not care about the status code. 209c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (request->GetResponseCode() != 200) { 210731df977c0511bca2206b5f333555b1205ff1f43Iain Merrick VLOG(1) << "Fetched PAC script had (bad) status line: " 211731df977c0511bca2206b5f333555b1205ff1f43Iain Merrick << request->response_headers()->GetStatusLine(); 212c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott result_code_ = ERR_PAC_STATUS_NOT_OK; 213c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott request->Cancel(); 214c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott return; 215c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott } 216c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 217c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott // NOTE about mime types: We do not enforce mime types on PAC files. 218c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott // This is for compatibility with {IE 7, Firefox 3, Opera 9.5}. We will 219c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott // however log mismatches to help with debugging. 220c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott std::string mime_type; 221c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott cur_request_->GetMimeType(&mime_type); 222c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (!IsPacMimeType(mime_type)) { 223731df977c0511bca2206b5f333555b1205ff1f43Iain Merrick VLOG(1) << "Fetched PAC script does not have a proper mime type: " 224731df977c0511bca2206b5f333555b1205ff1f43Iain Merrick << mime_type; 225c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott } 226c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott } 227c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 228c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott ReadBody(request); 229c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott} 230c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 23172a454cd3513ac24fbdd0e0cb9ad70b86a99b801Kristian Monsenvoid ProxyScriptFetcherImpl::OnReadCompleted(URLRequest* request, 232c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott int num_bytes) { 233201ade2fbba22bfb27ae029f4d23fca6ded109a0Ben Murdoch DCHECK_EQ(request, cur_request_.get()); 234201ade2fbba22bfb27ae029f4d23fca6ded109a0Ben Murdoch if (ConsumeBytesRead(request, num_bytes)) { 235201ade2fbba22bfb27ae029f4d23fca6ded109a0Ben Murdoch // Keep reading. 236c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott ReadBody(request); 237c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott } 238c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott} 239c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 24072a454cd3513ac24fbdd0e0cb9ad70b86a99b801Kristian Monsenvoid ProxyScriptFetcherImpl::ReadBody(URLRequest* request) { 241201ade2fbba22bfb27ae029f4d23fca6ded109a0Ben Murdoch // Read as many bytes as are available synchronously. 242201ade2fbba22bfb27ae029f4d23fca6ded109a0Ben Murdoch while (true) { 243201ade2fbba22bfb27ae029f4d23fca6ded109a0Ben Murdoch int num_bytes; 244201ade2fbba22bfb27ae029f4d23fca6ded109a0Ben Murdoch if (!request->Read(buf_, kBufSize, &num_bytes)) { 245201ade2fbba22bfb27ae029f4d23fca6ded109a0Ben Murdoch // Check whether the read failed synchronously. 246201ade2fbba22bfb27ae029f4d23fca6ded109a0Ben Murdoch if (!request->status().is_io_pending()) 247201ade2fbba22bfb27ae029f4d23fca6ded109a0Ben Murdoch OnResponseCompleted(request); 248201ade2fbba22bfb27ae029f4d23fca6ded109a0Ben Murdoch return; 249201ade2fbba22bfb27ae029f4d23fca6ded109a0Ben Murdoch } 250201ade2fbba22bfb27ae029f4d23fca6ded109a0Ben Murdoch if (!ConsumeBytesRead(request, num_bytes)) 251201ade2fbba22bfb27ae029f4d23fca6ded109a0Ben Murdoch return; 252201ade2fbba22bfb27ae029f4d23fca6ded109a0Ben Murdoch } 253201ade2fbba22bfb27ae029f4d23fca6ded109a0Ben Murdoch} 254201ade2fbba22bfb27ae029f4d23fca6ded109a0Ben Murdoch 25572a454cd3513ac24fbdd0e0cb9ad70b86a99b801Kristian Monsenbool ProxyScriptFetcherImpl::ConsumeBytesRead(URLRequest* request, 256201ade2fbba22bfb27ae029f4d23fca6ded109a0Ben Murdoch int num_bytes) { 257201ade2fbba22bfb27ae029f4d23fca6ded109a0Ben Murdoch if (num_bytes <= 0) { 258201ade2fbba22bfb27ae029f4d23fca6ded109a0Ben Murdoch // Error while reading, or EOF. 259c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott OnResponseCompleted(request); 260201ade2fbba22bfb27ae029f4d23fca6ded109a0Ben Murdoch return false; 261c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott } 262201ade2fbba22bfb27ae029f4d23fca6ded109a0Ben Murdoch 263201ade2fbba22bfb27ae029f4d23fca6ded109a0Ben Murdoch // Enforce maximum size bound. 264201ade2fbba22bfb27ae029f4d23fca6ded109a0Ben Murdoch if (num_bytes + bytes_read_so_far_.size() > 265201ade2fbba22bfb27ae029f4d23fca6ded109a0Ben Murdoch static_cast<size_t>(max_response_bytes_)) { 266201ade2fbba22bfb27ae029f4d23fca6ded109a0Ben Murdoch result_code_ = ERR_FILE_TOO_BIG; 267201ade2fbba22bfb27ae029f4d23fca6ded109a0Ben Murdoch request->Cancel(); 268201ade2fbba22bfb27ae029f4d23fca6ded109a0Ben Murdoch return false; 269201ade2fbba22bfb27ae029f4d23fca6ded109a0Ben Murdoch } 270201ade2fbba22bfb27ae029f4d23fca6ded109a0Ben Murdoch 271201ade2fbba22bfb27ae029f4d23fca6ded109a0Ben Murdoch bytes_read_so_far_.append(buf_->data(), num_bytes); 272201ade2fbba22bfb27ae029f4d23fca6ded109a0Ben Murdoch return true; 273c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott} 274c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 275c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scottvoid ProxyScriptFetcherImpl::FetchCompleted() { 276c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (result_code_ == OK) { 277c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch // The caller expects the response to be encoded as UTF16. 278c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott std::string charset; 279c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott cur_request_->GetCharset(&charset); 280c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch ConvertResponseToUTF16(charset, bytes_read_so_far_, result_text_); 281c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott } else { 282c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott // On error, the caller expects empty string for bytes. 283c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch result_text_->clear(); 284c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott } 285c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 286c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott int result_code = result_code_; 287c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott CompletionCallback* callback = callback_; 288c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 289201ade2fbba22bfb27ae029f4d23fca6ded109a0Ben Murdoch // Hold a reference to the URLRequestContext to prevent re-entrancy from 290201ade2fbba22bfb27ae029f4d23fca6ded109a0Ben Murdoch // ~URLRequestContext. 291201ade2fbba22bfb27ae029f4d23fca6ded109a0Ben Murdoch scoped_refptr<URLRequestContext> context(cur_request_->context()); 292c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott ResetCurRequestState(); 293c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 294c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott callback->Run(result_code); 295c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott} 296c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 297c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scottvoid ProxyScriptFetcherImpl::ResetCurRequestState() { 298c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott cur_request_.reset(); 299c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott cur_request_id_ = 0; 300c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott callback_ = NULL; 301c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott result_code_ = OK; 302c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch result_text_ = NULL; 303c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott} 304c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 305c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scottvoid ProxyScriptFetcherImpl::OnTimeout(int id) { 30672a454cd3513ac24fbdd0e0cb9ad70b86a99b801Kristian Monsen // Timeout tasks may outlive the URLRequest they reference. Make sure it 307c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott // is still applicable. 308c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (cur_request_id_ != id) 309c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott return; 310c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 311c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott DCHECK(cur_request_.get()); 312c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott result_code_ = ERR_TIMED_OUT; 313c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott cur_request_->Cancel(); 314c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott} 315c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 316c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott} // namespace net 317