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// Copyright 2014 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/bitmap_fetcher/bitmap_fetcher.h"
#include "base/functional/bind.h"
#include "base/task/sequenced_task_runner.h"
#include "content/public/browser/browser_context.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/browser/storage_partition.h"
#include "net/base/data_url.h"
#include "net/cookies/site_for_cookies.h"
#include "net/http/http_request_headers.h"
#include "services/network/public/cpp/resource_request.h"
#include "url/url_constants.h"
BitmapFetcher::BitmapFetcher(
const GURL& url,
BitmapFetcherDelegate* delegate,
const net::NetworkTrafficAnnotationTag& traffic_annotation)
: BitmapFetcher(url, delegate, traffic_annotation, nullptr) {}
BitmapFetcher::BitmapFetcher(
const GURL& url,
BitmapFetcherDelegate* delegate,
const net::NetworkTrafficAnnotationTag& traffic_annotation,
data_decoder::DataDecoder* data_decoder)
: ImageDecoder::ImageRequest(data_decoder),
url_(url),
delegate_(delegate),
traffic_annotation_(traffic_annotation) {}
BitmapFetcher::~BitmapFetcher() = default;
void BitmapFetcher::Init(net::ReferrerPolicy referrer_policy,
network::mojom::CredentialsMode credentials_mode,
const net::HttpRequestHeaders& additional_headers,
const url::Origin& initiator,
bool is_same_site_request) {
if (simple_loader_ != nullptr)
return;
auto resource_request = std::make_unique<network::ResourceRequest>();
resource_request->url = url_;
resource_request->referrer_policy = referrer_policy;
resource_request->credentials_mode = credentials_mode;
if (is_same_site_request) {
resource_request->site_for_cookies =
net::SiteForCookies::FromUrl(resource_request->url);
}
resource_request->headers.MergeFrom(additional_headers);
resource_request->request_initiator = initiator;
simple_loader_ = network::SimpleURLLoader::Create(std::move(resource_request),
traffic_annotation_);
}
void BitmapFetcher::Start(network::mojom::URLLoaderFactory* loader_factory) {
network::SimpleURLLoader::BodyAsStringCallbackDeprecated callback =
base::BindOnce(&BitmapFetcher::OnSimpleLoaderComplete,
weak_factory_.GetWeakPtr());
// Early exit to handle data URLs.
if (url_.SchemeIs(url::kDataScheme)) {
std::string mime_type, charset, data;
std::unique_ptr<std::string> response_body;
if (net::DataURL::Parse(url_, &mime_type, &charset, &data))
response_body = std::make_unique<std::string>(std::move(data));
// Post a task to maintain our guarantee that the delegate will only be
// called asynchronously.
base::SequencedTaskRunner::GetCurrentDefault()->PostTask(
FROM_HERE, BindOnce(std::move(callback), std::move(response_body)));
return;
}
if (simple_loader_) {
simple_loader_->DownloadToStringOfUnboundedSizeUntilCrashAndDie(
loader_factory, std::move(callback));
}
}
void BitmapFetcher::OnSimpleLoaderComplete(
std::unique_ptr<std::string> response_body) {
if (!response_body) {
ReportFailure();
return;
}
// Call start to begin decoding. The ImageDecoder will call OnImageDecoded
// with the data when it is done.
ImageDecoder::Start(this, std::move(*response_body));
}
// Methods inherited from ImageDecoder::ImageRequest.
void BitmapFetcher::OnImageDecoded(const SkBitmap& decoded_image) {
delegate_->OnFetchComplete(url_, &decoded_image);
}
void BitmapFetcher::OnDecodeImageFailed() {
ReportFailure();
}
void BitmapFetcher::ReportFailure() {
delegate_->OnFetchComplete(url_, nullptr);
}
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