| // 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 "components/image_fetcher/core/image_data_fetcher.h" |
| |
| #include <utility> |
| |
| #include "net/base/load_flags.h" |
| #include "net/http/http_response_headers.h" |
| #include "net/http/http_status_code.h" |
| #include "net/url_request/url_request.h" // for ReferrerPolicy |
| #include "services/network/public/cpp/resource_request.h" |
| #include "services/network/public/cpp/shared_url_loader_factory.h" |
| #include "services/network/public/cpp/simple_url_loader.h" |
| #include "url/gurl.h" |
| |
| using data_use_measurement::DataUseUserData; |
| |
| namespace { |
| |
| const char kContentLocationHeader[] = "Content-Location"; |
| |
| } // namespace |
| |
| namespace image_fetcher { |
| |
| // An active image URL fetcher request. The struct contains the related requests |
| // state. |
| struct ImageDataFetcher::ImageDataFetcherRequest { |
| ImageDataFetcherRequest(ImageDataFetcherCallback callback, |
| std::unique_ptr<network::SimpleURLLoader> loader) |
| : callback(std::move(callback)), loader(std::move(loader)) {} |
| |
| ~ImageDataFetcherRequest() {} |
| |
| // The callback to run after the image data was fetched. The callback will |
| // be run even if the image data could not be fetched successfully. |
| ImageDataFetcherCallback callback; |
| |
| std::unique_ptr<network::SimpleURLLoader> loader; |
| }; |
| |
| ImageDataFetcher::ImageDataFetcher( |
| scoped_refptr<network::SharedURLLoaderFactory> url_loader_factory) |
| : url_loader_factory_(url_loader_factory), |
| data_use_service_name_(DataUseUserData::IMAGE_FETCHER_UNTAGGED) { |
| DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_); |
| } |
| |
| ImageDataFetcher::~ImageDataFetcher() { |
| DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_); |
| } |
| |
| void ImageDataFetcher::SetDataUseServiceName( |
| DataUseServiceName data_use_service_name) { |
| DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_); |
| data_use_service_name_ = data_use_service_name; |
| } |
| |
| void ImageDataFetcher::SetImageDownloadLimit( |
| base::Optional<int64_t> max_download_bytes) { |
| DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_); |
| max_download_bytes_ = max_download_bytes; |
| } |
| |
| void ImageDataFetcher::FetchImageData( |
| const GURL& image_url, |
| ImageDataFetcherCallback callback, |
| const net::NetworkTrafficAnnotationTag& traffic_annotation, |
| bool send_cookies) { |
| FetchImageData( |
| image_url, std::move(callback), /*referrer=*/std::string(), |
| net::URLRequest::CLEAR_REFERRER_ON_TRANSITION_FROM_SECURE_TO_INSECURE, |
| traffic_annotation, send_cookies); |
| } |
| |
| void ImageDataFetcher::FetchImageData( |
| const GURL& image_url, |
| ImageDataFetcherCallback callback, |
| const std::string& referrer, |
| net::URLRequest::ReferrerPolicy referrer_policy, |
| const net::NetworkTrafficAnnotationTag& traffic_annotation, |
| bool send_cookies) { |
| DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_); |
| auto request = std::make_unique<network::ResourceRequest>(); |
| request->url = image_url; |
| request->referrer_policy = referrer_policy; |
| request->referrer = GURL(referrer); |
| if (!send_cookies) { |
| request->load_flags = net::LOAD_DO_NOT_SEND_COOKIES | |
| net::LOAD_DO_NOT_SAVE_COOKIES | |
| net::LOAD_DO_NOT_SEND_AUTH_DATA; |
| } |
| |
| // TODO(https://crbug.com/808498) re-add data use measurement once |
| // SimpleURLLoader supports it. Parameter: |
| // data_use_service_name_ |
| |
| std::unique_ptr<network::SimpleURLLoader> loader = |
| network::SimpleURLLoader::Create(std::move(request), traffic_annotation); |
| |
| // For compatibility in error handling. This is a little wasteful since the |
| // body will get thrown out anyway, though. |
| loader->SetAllowHttpErrorResults(true); |
| |
| if (max_download_bytes_.has_value()) { |
| loader->DownloadToString( |
| url_loader_factory_.get(), |
| base::BindOnce(&ImageDataFetcher::OnURLLoaderComplete, |
| base::Unretained(this), loader.get()), |
| max_download_bytes_.value()); |
| } else { |
| loader->DownloadToStringOfUnboundedSizeUntilCrashAndDie( |
| url_loader_factory_.get(), |
| base::BindOnce(&ImageDataFetcher::OnURLLoaderComplete, |
| base::Unretained(this), loader.get())); |
| } |
| |
| std::unique_ptr<ImageDataFetcherRequest> request_track( |
| new ImageDataFetcherRequest(std::move(callback), std::move(loader))); |
| |
| network::SimpleURLLoader* loader_raw = request_track->loader.get(); |
| pending_requests_[loader_raw] = std::move(request_track); |
| } |
| |
| void ImageDataFetcher::OnURLLoaderComplete( |
| const network::SimpleURLLoader* source, |
| std::unique_ptr<std::string> response_body) { |
| DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_); |
| DCHECK(pending_requests_.find(source) != pending_requests_.end()); |
| bool success = source->NetError() == net::OK; |
| |
| RequestMetadata metadata; |
| if (success && source->ResponseInfo() && source->ResponseInfo()->headers) { |
| net::HttpResponseHeaders* headers = source->ResponseInfo()->headers.get(); |
| metadata.mime_type = source->ResponseInfo()->mime_type; |
| metadata.http_response_code = headers->response_code(); |
| // Just read the first value-pair for this header (not caring about |iter|). |
| headers->EnumerateHeader( |
| /*iter=*/nullptr, kContentLocationHeader, |
| &metadata.content_location_header); |
| success &= (metadata.http_response_code == net::HTTP_OK); |
| } |
| |
| std::string image_data; |
| if (success && response_body) { |
| image_data = std::move(*response_body); |
| } |
| FinishRequest(source, metadata, image_data); |
| } |
| |
| void ImageDataFetcher::FinishRequest(const network::SimpleURLLoader* source, |
| const RequestMetadata& metadata, |
| const std::string& image_data) { |
| DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_); |
| auto request_iter = pending_requests_.find(source); |
| DCHECK(request_iter != pending_requests_.end()); |
| auto callback = std::move(request_iter->second->callback); |
| pending_requests_.erase(request_iter); |
| std::move(callback).Run(image_data, metadata); |
| // |this| might be destroyed now. |
| } |
| |
| void ImageDataFetcher::InjectResultForTesting(const RequestMetadata& metadata, |
| const std::string& image_data) { |
| DCHECK_EQ(pending_requests_.size(), 1u); |
| FinishRequest(pending_requests_.begin()->first, metadata, image_data); |
| } |
| |
| } // namespace image_fetcher |