| // Copyright 2017 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 "components/offline_pages/core/prefetch/prefetch_request_fetcher.h" |
| |
| #include "base/logging.h" |
| #include "base/memory/ptr_util.h" |
| #include "components/offline_pages/core/prefetch/prefetch_server_urls.h" |
| #include "google_apis/google_api_keys.h" |
| #include "net/base/load_flags.h" |
| #include "net/base/url_util.h" |
| #include "net/http/http_request_headers.h" |
| #include "net/http/http_status_code.h" |
| #include "net/traffic_annotation/network_traffic_annotation.h" |
| #include "services/network/public/cpp/shared_url_loader_factory.h" |
| #include "services/network/public/cpp/simple_url_loader.h" |
| #include "url/gurl.h" |
| |
| namespace offline_pages { |
| |
| namespace { |
| |
| // Content type needed in order to communicate with the server in binary |
| // proto format. |
| const char kRequestContentType[] = "application/x-protobuf"; |
| |
| } // namespace |
| |
| // static |
| std::unique_ptr<PrefetchRequestFetcher> PrefetchRequestFetcher::CreateForGet( |
| const GURL& url, |
| scoped_refptr<network::SharedURLLoaderFactory> url_loader_factory, |
| FinishedCallback callback) { |
| return base::WrapUnique(new PrefetchRequestFetcher( |
| url, std::string(), url_loader_factory, std::move(callback))); |
| } |
| |
| // static |
| std::unique_ptr<PrefetchRequestFetcher> PrefetchRequestFetcher::CreateForPost( |
| const GURL& url, |
| const std::string& message, |
| scoped_refptr<network::SharedURLLoaderFactory> url_loader_factory, |
| FinishedCallback callback) { |
| return base::WrapUnique(new PrefetchRequestFetcher( |
| url, message, url_loader_factory, std::move(callback))); |
| } |
| |
| PrefetchRequestFetcher::PrefetchRequestFetcher( |
| const GURL& url, |
| const std::string& message, |
| scoped_refptr<network::SharedURLLoaderFactory> url_loader_factory, |
| FinishedCallback callback) |
| : url_loader_factory_(url_loader_factory), callback_(std::move(callback)) { |
| net::NetworkTrafficAnnotationTag traffic_annotation = |
| net::DefineNetworkTrafficAnnotation("offline_prefetch", R"( |
| semantics { |
| sender: "Offline Prefetch" |
| description: |
| "Chromium interacts with Offline Page Service to prefetch " |
| "suggested website resources." |
| trigger: |
| "When there are suggested website resources to fetch." |
| data: |
| "URLs of the suggested website resources to fetch." |
| destination: GOOGLE_OWNED_SERVICE |
| } |
| policy { |
| cookies_allowed: NO |
| setting: |
| "Users can enable or disable the offline prefetch by toggling" |
| "chrome://flags#offline-prefetch in Chromium on Android." |
| policy_exception_justification: |
| "Not implemented, considered not useful." |
| })"); |
| auto resource_request = std::make_unique<network::ResourceRequest>(); |
| resource_request->url = url; |
| resource_request->method = message.empty() ? "GET" : "POST"; |
| resource_request->load_flags = |
| net::LOAD_DO_NOT_SEND_COOKIES | net::LOAD_DO_NOT_SAVE_COOKIES; |
| |
| std::string experiment_header = PrefetchExperimentHeader(); |
| if (!experiment_header.empty()) |
| resource_request->headers.AddHeaderFromString(experiment_header); |
| |
| if (message.empty()) |
| resource_request->headers.SetHeader(net::HttpRequestHeaders::kContentType, |
| kRequestContentType); |
| |
| url_loader_ = network::SimpleURLLoader::Create(std::move(resource_request), |
| traffic_annotation); |
| |
| if (!message.empty()) |
| url_loader_->AttachStringForUpload(message, kRequestContentType); |
| |
| url_loader_->DownloadToStringOfUnboundedSizeUntilCrashAndDie( |
| url_loader_factory_.get(), |
| base::BindOnce(&PrefetchRequestFetcher::OnURLLoadComplete, |
| base::Unretained(this))); |
| } |
| |
| PrefetchRequestFetcher::~PrefetchRequestFetcher() {} |
| |
| void PrefetchRequestFetcher::OnURLLoadComplete( |
| std::unique_ptr<std::string> response_body) { |
| std::string data; |
| PrefetchRequestStatus status = ParseResponse(std::move(response_body), &data); |
| |
| // TODO(jianli): Report UMA. |
| |
| std::move(callback_).Run(status, data); |
| } |
| |
| PrefetchRequestStatus PrefetchRequestFetcher::ParseResponse( |
| std::unique_ptr<std::string> response_body, |
| std::string* data) { |
| int response_code = -1; |
| if (url_loader_->ResponseInfo() && url_loader_->ResponseInfo()->headers) |
| response_code = url_loader_->ResponseInfo()->headers->response_code(); |
| |
| if ((response_code < 200 || response_code > 299) && response_code != -1) { |
| DVLOG(1) << "HTTP status: " << response_code; |
| return (response_code == net::HTTP_NOT_IMPLEMENTED) |
| ? PrefetchRequestStatus::SHOULD_SUSPEND |
| : PrefetchRequestStatus::SHOULD_RETRY_WITH_BACKOFF; |
| } |
| |
| if (!response_body) { |
| int net_error = url_loader_->NetError(); |
| DVLOG(1) << "Net error: " << net_error; |
| return (net_error == net::ERR_BLOCKED_BY_ADMINISTRATOR) |
| ? PrefetchRequestStatus::SHOULD_SUSPEND |
| : PrefetchRequestStatus::SHOULD_RETRY_WITHOUT_BACKOFF; |
| } |
| |
| if (response_body->empty()) { |
| DVLOG(1) << "Failed to get response or empty response"; |
| return PrefetchRequestStatus::SHOULD_RETRY_WITH_BACKOFF; |
| } |
| |
| *data = *response_body; |
| return PrefetchRequestStatus::SUCCESS; |
| } |
| |
| } // offline_pages |