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| 1 // Copyright 2014 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 "components/update_client/update_checker.h" |
| 6 |
| 7 #include <string> |
| 8 #include <vector> |
| 9 |
| 10 #include "base/bind.h" |
| 11 #include "base/bind_helpers.h" |
| 12 #include "base/compiler_specific.h" |
| 13 #include "base/location.h" |
| 14 #include "base/logging.h" |
| 15 #include "base/macros.h" |
| 16 #include "base/memory/scoped_ptr.h" |
| 17 #include "base/strings/stringprintf.h" |
| 18 #include "base/threading/thread_checker.h" |
| 19 #include "components/update_client/configurator.h" |
| 20 #include "components/update_client/crx_update_item.h" |
| 21 #include "components/update_client/request_sender.h" |
| 22 #include "components/update_client/utils.h" |
| 23 #include "net/url_request/url_fetcher.h" |
| 24 #include "url/gurl.h" |
| 25 |
| 26 namespace update_client { |
| 27 |
| 28 namespace { |
| 29 |
| 30 // Builds an update check request for |components|. |additional_attributes| is |
| 31 // serialized as part of the <request> element of the request to customize it |
| 32 // with data that is not platform or component specific. For each |item|, a |
| 33 // corresponding <app> element is created and inserted as a child node of |
| 34 // the <request>. |
| 35 // |
| 36 // An app element looks like this: |
| 37 // <app appid="hnimpnehoodheedghdeeijklkeaacbdc" |
| 38 // version="0.1.2.3" installsource="ondemand"> |
| 39 // <updatecheck /> |
| 40 // <packages> |
| 41 // <package fp="abcd" /> |
| 42 // </packages> |
| 43 // </app> |
| 44 std::string BuildUpdateCheckRequest(const Configurator& config, |
| 45 const std::vector<CrxUpdateItem*>& items, |
| 46 const std::string& additional_attributes) { |
| 47 std::string app_elements; |
| 48 for (size_t i = 0; i != items.size(); ++i) { |
| 49 const CrxUpdateItem* item = items[i]; |
| 50 std::string app("<app "); |
| 51 base::StringAppendF(&app, "appid=\"%s\" version=\"%s\"", item->id.c_str(), |
| 52 item->component.version.GetString().c_str()); |
| 53 if (item->on_demand) |
| 54 base::StringAppendF(&app, " installsource=\"ondemand\""); |
| 55 base::StringAppendF(&app, ">"); |
| 56 base::StringAppendF(&app, "<updatecheck />"); |
| 57 if (!item->component.fingerprint.empty()) { |
| 58 base::StringAppendF(&app, |
| 59 "<packages>" |
| 60 "<package fp=\"%s\"/>" |
| 61 "</packages>", |
| 62 item->component.fingerprint.c_str()); |
| 63 } |
| 64 base::StringAppendF(&app, "</app>"); |
| 65 app_elements.append(app); |
| 66 VLOG(1) << "Appending to update request: " << app; |
| 67 } |
| 68 |
| 69 return BuildProtocolRequest(config.GetBrowserVersion().GetString(), |
| 70 config.GetChannel(), config.GetLang(), |
| 71 config.GetOSLongName(), app_elements, |
| 72 additional_attributes); |
| 73 } |
| 74 |
| 75 class UpdateCheckerImpl : public UpdateChecker { |
| 76 public: |
| 77 explicit UpdateCheckerImpl(const Configurator& config); |
| 78 ~UpdateCheckerImpl() override; |
| 79 |
| 80 // Overrides for UpdateChecker. |
| 81 bool CheckForUpdates( |
| 82 const std::vector<CrxUpdateItem*>& items_to_check, |
| 83 const std::string& additional_attributes, |
| 84 const UpdateCheckCallback& update_check_callback) override; |
| 85 |
| 86 private: |
| 87 void OnRequestSenderComplete(const net::URLFetcher* source); |
| 88 |
| 89 const Configurator& config_; |
| 90 UpdateCheckCallback update_check_callback_; |
| 91 scoped_ptr<RequestSender> request_sender_; |
| 92 |
| 93 base::ThreadChecker thread_checker_; |
| 94 |
| 95 DISALLOW_COPY_AND_ASSIGN(UpdateCheckerImpl); |
| 96 }; |
| 97 |
| 98 UpdateCheckerImpl::UpdateCheckerImpl(const Configurator& config) |
| 99 : config_(config) { |
| 100 } |
| 101 |
| 102 UpdateCheckerImpl::~UpdateCheckerImpl() { |
| 103 DCHECK(thread_checker_.CalledOnValidThread()); |
| 104 } |
| 105 |
| 106 bool UpdateCheckerImpl::CheckForUpdates( |
| 107 const std::vector<CrxUpdateItem*>& items_to_check, |
| 108 const std::string& additional_attributes, |
| 109 const UpdateCheckCallback& update_check_callback) { |
| 110 DCHECK(thread_checker_.CalledOnValidThread()); |
| 111 |
| 112 if (request_sender_.get()) { |
| 113 NOTREACHED(); |
| 114 return false; // Another update check is in progress. |
| 115 } |
| 116 |
| 117 update_check_callback_ = update_check_callback; |
| 118 |
| 119 request_sender_.reset(new RequestSender(config_)); |
| 120 request_sender_->Send( |
| 121 BuildUpdateCheckRequest(config_, items_to_check, additional_attributes), |
| 122 config_.UpdateUrl(), |
| 123 base::Bind(&UpdateCheckerImpl::OnRequestSenderComplete, |
| 124 base::Unretained(this))); |
| 125 return true; |
| 126 } |
| 127 |
| 128 void UpdateCheckerImpl::OnRequestSenderComplete(const net::URLFetcher* source) { |
| 129 DCHECK(thread_checker_.CalledOnValidThread()); |
| 130 |
| 131 const GURL original_url(source->GetOriginalURL()); |
| 132 VLOG(1) << "Update check request went to: " << original_url.spec(); |
| 133 |
| 134 int error = 0; |
| 135 std::string error_message; |
| 136 UpdateResponse update_response; |
| 137 |
| 138 if (FetchSuccess(*source)) { |
| 139 std::string xml; |
| 140 source->GetResponseAsString(&xml); |
| 141 if (!update_response.Parse(xml)) { |
| 142 error = -1; |
| 143 error_message = update_response.errors(); |
| 144 VLOG(1) << "Update request failed: " << error_message; |
| 145 } |
| 146 } else { |
| 147 error = GetFetchError(*source); |
| 148 error_message.assign("network error"); |
| 149 VLOG(1) << "Update request failed: network error"; |
| 150 } |
| 151 |
| 152 request_sender_.reset(); |
| 153 update_check_callback_.Run(original_url, error, error_message, |
| 154 update_response.results()); |
| 155 } |
| 156 |
| 157 } // namespace |
| 158 |
| 159 scoped_ptr<UpdateChecker> UpdateChecker::Create(const Configurator& config) { |
| 160 return scoped_ptr<UpdateChecker>(new UpdateCheckerImpl(config)); |
| 161 } |
| 162 |
| 163 } // namespace update_client |
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