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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.
#ifndef CHROME_BROWSER_BITMAP_FETCHER_BITMAP_FETCHER_H_
#define CHROME_BROWSER_BITMAP_FETCHER_BITMAP_FETCHER_H_
#include <memory>
#include "base/memory/raw_ptr.h"
#include "base/memory/weak_ptr.h"
#include "chrome/browser/bitmap_fetcher/bitmap_fetcher_delegate.h"
#include "chrome/browser/image_decoder/image_decoder.h"
#include "net/http/http_request_headers.h"
#include "net/traffic_annotation/network_traffic_annotation.h"
#include "net/url_request/referrer_policy.h"
#include "services/network/public/cpp/simple_url_loader.h"
#include "services/network/public/mojom/fetch_api.mojom-forward.h"
#include "services/network/public/mojom/url_loader_factory.mojom-forward.h"
#include "url/gurl.h"
#include "url/origin.h"
class SkBitmap;
// Asynchronously fetches an image from the given URL and returns the
// decoded Bitmap to the provided BitmapFetcherDelegate.
class BitmapFetcher : public ImageDecoder::ImageRequest {
public:
BitmapFetcher(const GURL& url,
BitmapFetcherDelegate* delegate,
const net::NetworkTrafficAnnotationTag& traffic_annotation);
BitmapFetcher(const GURL& url,
BitmapFetcherDelegate* delegate,
const net::NetworkTrafficAnnotationTag& traffic_annotation,
data_decoder::DataDecoder* data_decoder);
BitmapFetcher(const BitmapFetcher&) = delete;
BitmapFetcher& operator=(const BitmapFetcher&) = delete;
~BitmapFetcher() override;
const GURL& url() const { return url_; }
// `credentials_mode` determines whether credentials such as cookies should be
// sent. Init may be called more than once in some cases. If so, subsequent
// calls will be ignored.
// `additional_headers` will be merged with default HTTP headers provided by
// `BitmapFetcher` when fetching the image.
// If `is_same_site_request` is true, the request is initiated as same-site:
// https://datatracker.ietf.org/doc/html/draft-ietf-httpbis-rfc6265bis#name-same-site-and-cross-site-re.
// TODO(tommycli): Init and Start should likely be combined.
virtual void Init(net::ReferrerPolicy referrer_policy,
network::mojom::CredentialsMode credentials_mode,
const net::HttpRequestHeaders& additional_headers = {},
const url::Origin& initiator = url::Origin(),
bool is_same_site_request = false);
// Start fetching the URL with the fetcher. The delegate is notified
// asynchronously when done. Start may be called more than once in some
// cases. If so, subsequent calls will be ignored since the operation is
// already in progress.
virtual void Start(network::mojom::URLLoaderFactory* loader_factory);
// Methods inherited from ImageDecoder::ImageRequest
// Called when image is decoded. |decoder| is used to identify the image in
// case of decoding several images simultaneously.
void OnImageDecoded(const SkBitmap& decoded_image) override;
// Called when decoding image failed.
void OnDecodeImageFailed() override;
private:
void OnSimpleLoaderComplete(std::unique_ptr<std::string> response_body);
// Alerts the delegate that a failure occurred.
void ReportFailure();
std::unique_ptr<network::SimpleURLLoader> simple_loader_;
const GURL url_;
const raw_ptr<BitmapFetcherDelegate> delegate_;
const net::NetworkTrafficAnnotationTag traffic_annotation_;
base::WeakPtrFactory<BitmapFetcher> weak_factory_{this};
};
#endif // CHROME_BROWSER_BITMAP_FETCHER_BITMAP_FETCHER_H_
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