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// Copyright 2024 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "ash/quick_insert/quick_insert_asset_fetcher_impl.h"
#include <memory>
#include <string>
#include <utility>
#include "ash/public/cpp/image_util.h"
#include "ash/quick_insert/quick_insert_asset_fetcher.h"
#include "ash/quick_insert/quick_insert_asset_fetcher_impl_delegate.h"
#include "base/functional/bind.h"
#include "base/functional/callback.h"
#include "base/rand_util.h"
#include "base/task/sequenced_task_runner.h"
#include "net/http/http_status_code.h"
#include "net/traffic_annotation/network_traffic_annotation.h"
#include "services/data_decoder/public/mojom/image_decoder.mojom-shared.h"
#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 "services/network/public/mojom/fetch_api.mojom-shared.h"
#include "url/gurl.h"
#include "url/url_constants.h"
namespace ash {
namespace {
using DownloadGifMediaToStringCallback =
base::OnceCallback<void(const std::string& gif_media_data)>;
bool IsValidGifMediaUrl(const GURL& url) {
// TODO: b/323784358 - Check requirements for validating GIF urls.
return url.DomainIs("media.tenor.com") && url.SchemeIs(url::kHttpsScheme);
}
void OnGifMediaDownloaded(base::WeakPtr<const network::SimpleURLLoader> loader,
DownloadGifMediaToStringCallback callback,
std::unique_ptr<std::string> response_body) {
if (loader && loader->NetError() == net::OK && response_body) {
std::move(callback).Run(*response_body);
return;
}
// TODO: b/325368650 - Determine how network errors should be handled.
std::move(callback).Run(std::string());
}
// Creates a network request for GIF without starting the request.
std::unique_ptr<network::SimpleURLLoader> CreateGifMediaRequest(
const GURL& url) {
if (!IsValidGifMediaUrl(url)) {
return nullptr;
}
auto resource_request = std::make_unique<network::ResourceRequest>();
resource_request->url = url;
resource_request->method = "GET";
resource_request->credentials_mode = network::mojom::CredentialsMode::kOmit;
constexpr net::NetworkTrafficAnnotationTag kTrafficAnnotation =
net::DefineNetworkTrafficAnnotation(
"chromeos_quick_insert_gif_media_fetcher",
R"(
semantics {
sender: "ChromeOS Quick Insert"
description:
"Fetches a GIF or GIF preview from Tenor for the specified url. This "
"is used to show GIFs and GIF preview images in ChromeOS Quick "
"Insert, which users can select to insert the GIF into supported "
"textfields."
trigger:
"Triggered when the user opens ChromeOS Quick Insert."
data:
"A GIF ID to specify the GIF to fetch."
destination: GOOGLE_OWNED_SERVICE
internal {
contacts {
email: "e14s-eng@google.com"
}
}
user_data {
type: NONE
}
last_reviewed: "2024-10-15"
}
policy {
cookies_allowed: NO
setting:
"No setting. Users must take explicit action to trigger the feature."
policy_exception_justification:
"Not implemented, not considered useful. This request is part of a "
"flow which is user-initiated."
}
)");
return network::SimpleURLLoader::Create(std::move(resource_request),
kTrafficAnnotation);
}
// Downloads a gif or gif preview using `loader`. If the download is successful,
// the gif is passed to `callback` as a string of encoded bytes in gif or png
// format. Otherwise, `callback` is run with an empty string.
void DownloadGifMediaToString(
base::WeakPtr<const network::SimpleURLLoader> loader,
scoped_refptr<network::SharedURLLoaderFactory> shared_url_loader_factory,
DownloadGifMediaToStringCallback callback) {
if (!loader) {
return;
}
// This is safe because `loader` is a WeakPtr to the non-const SimpleURLLoader
// created by `CreateGifMediaRequest`.
const_cast<network::SimpleURLLoader*>(loader.get())
->DownloadToString(
shared_url_loader_factory.get(),
base::BindOnce(&OnGifMediaDownloaded, loader, std::move(callback)),
network::SimpleURLLoader::kMaxBoundedStringDownloadSize);
}
void RunImmediatelyOrWithDelay(base::OnceClosure closure,
base::TimeDelta delay) {
if (delay.is_zero()) {
std::move(closure).Run();
} else {
base::SequencedTaskRunner::GetCurrentDefault()->PostDelayedTask(
FROM_HERE, std::move(closure), delay);
}
}
// Returns the delay for the request with `rank`.
// The delay should increase with `rank` to encourage lower rank requests to
// finish first and avoid congestion.
base::TimeDelta GetRequestDelay(size_t rank) {
// The top 4 results should be fetched instantly, since they are likely to be
// visible above the fold.
if (rank < 4) {
return base::Seconds(0);
}
// The remaining results can be fetched later since they are likely to be
// below the fold.
return base::Milliseconds(200) + rank * base::Milliseconds(100);
}
} // namespace
QuickInsertAssetFetcherImpl::QuickInsertAssetFetcherImpl(
QuickInsertAssetFetcherImplDelegate* delegate)
: delegate_(delegate) {}
QuickInsertAssetFetcherImpl::~QuickInsertAssetFetcherImpl() = default;
std::unique_ptr<network::SimpleURLLoader>
QuickInsertAssetFetcherImpl::FetchGifFromUrl(
const GURL& url,
size_t rank,
QuickInsertGifFetchedCallback callback) {
std::unique_ptr<network::SimpleURLLoader> loader = CreateGifMediaRequest(url);
if (loader == nullptr) {
std::move(callback).Run({});
return nullptr;
}
RunImmediatelyOrWithDelay(
base::BindOnce(&DownloadGifMediaToString, loader->GetWeakPtr(),
delegate_->GetSharedURLLoaderFactory(),
base::BindOnce(&image_util::DecodeAnimationData,
std::move(callback))),
GetRequestDelay(rank) + base::Milliseconds(200));
return loader;
}
std::unique_ptr<network::SimpleURLLoader>
QuickInsertAssetFetcherImpl::FetchGifPreviewImageFromUrl(
const GURL& url,
size_t rank,
QuickInsertImageFetchedCallback callback) {
std::unique_ptr<network::SimpleURLLoader> loader = CreateGifMediaRequest(url);
if (loader == nullptr) {
std::move(callback).Run({});
return nullptr;
}
RunImmediatelyOrWithDelay(
base::BindOnce(
&DownloadGifMediaToString, loader->GetWeakPtr(),
delegate_->GetSharedURLLoaderFactory(),
base::BindOnce(&image_util::DecodeImageData, std::move(callback),
data_decoder::mojom::ImageCodec::kDefault)),
GetRequestDelay(rank));
return loader;
}
void QuickInsertAssetFetcherImpl::FetchFileThumbnail(
const base::FilePath& path,
const gfx::Size& size,
FetchFileThumbnailCallback callback) {
delegate_->FetchFileThumbnail(path, size, std::move(callback));
}
} // namespace ash
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