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// 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.
#ifndef COMPONENTS_IMAGE_FETCHER_IOS_IOS_IMAGE_DATA_FETCHER_WRAPPER_H_
#define COMPONENTS_IMAGE_FETCHER_IOS_IOS_IMAGE_DATA_FETCHER_WRAPPER_H_
#import <Foundation/Foundation.h>
#include "base/memory/ref_counted.h"
#include "components/data_use_measurement/core/data_use_user_data.h"
#include "components/image_fetcher/core/image_data_fetcher.h"
namespace net {
class URLRequestContextGetter;
}
class GURL;
namespace image_fetcher {
// Callback that informs of the download of an image encoded in |data| and the
// associated metadata. If an error prevented a http response,
// |metadata.http_response_code| will be RESPONSE_CODE_INVALID.
using IOSImageDataFetcherCallback = void (^)(NSData* data,
const RequestMetadata& metadata);
class IOSImageDataFetcherWrapper {
public:
using DataUseServiceName = data_use_measurement::DataUseUserData::ServiceName;
// The TaskRunner is used to decode the image if it is WebP-encoded.
explicit IOSImageDataFetcherWrapper(
net::URLRequestContextGetter* url_request_context_getter);
virtual ~IOSImageDataFetcherWrapper();
// Helper to start downloading and possibly decoding the image without a
// referrer.
virtual void FetchImageDataWebpDecoded(const GURL& image_url,
IOSImageDataFetcherCallback callback);
// Start downloading the image at the given |image_url|. The |callback| will
// be called with the downloaded image, or nil if any error happened. If the
// image is WebP it will be decoded.
// The |referrer| and |referrer_policy| will be passed on to the underlying
// URLFetcher.
// |callback| cannot be nil.
void FetchImageDataWebpDecoded(
const GURL& image_url,
IOSImageDataFetcherCallback callback,
const std::string& referrer,
net::URLRequest::ReferrerPolicy referrer_policy);
// Sets a service name against which to track data usage.
void SetDataUseServiceName(DataUseServiceName data_use_service_name);
private:
ImageDataFetcher::ImageDataFetcherCallback CallbackForImageDataFetcher(
IOSImageDataFetcherCallback callback);
ImageDataFetcher image_data_fetcher_;
DISALLOW_COPY_AND_ASSIGN(IOSImageDataFetcherWrapper);
};
} // namespace image_fetcher
#endif // COMPONENTS_IMAGE_FETCHER_IOS_IOS_IMAGE_DATA_FETCHER_WRAPPER_H_
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