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content / browser / background_fetch / background_fetch_delegate_proxy.cc [blame]
// Copyright 2017 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "content/browser/background_fetch/background_fetch_delegate_proxy.h"
#include <utility>
#include "base/functional/bind.h"
#include "components/download/public/common/download_item.h"
#include "components/download/public/common/download_url_parameters.h"
#include "content/browser/background_fetch/background_fetch_job_controller.h"
#include "content/browser/renderer_host/render_frame_host_impl.h"
#include "content/browser/storage_partition_impl.h"
#include "content/public/browser/background_fetch_description.h"
#include "content/public/browser/background_fetch_response.h"
#include "content/public/browser/browser_context.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/browser/download_manager.h"
#include "content/public/browser/download_manager_delegate.h"
#include "content/public/browser/permission_controller.h"
#include "content/public/browser/web_contents.h"
#include "third_party/blink/public/common/permissions/permission_utils.h"
#include "third_party/blink/public/mojom/blob/serialized_blob.mojom.h"
#include "third_party/skia/include/core/SkBitmap.h"
#include "ui/gfx/geometry/size.h"
namespace content {
BackgroundFetchDelegateProxy::BackgroundFetchDelegateProxy(
base::WeakPtr<StoragePartitionImpl> storage_partition)
: storage_partition_(std::move(storage_partition)) {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
}
BackgroundFetchDelegateProxy::~BackgroundFetchDelegateProxy() {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
}
void BackgroundFetchDelegateProxy::SetClickEventDispatcher(
DispatchClickEventCallback callback) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
click_event_dispatcher_callback_ = std::move(callback);
}
void BackgroundFetchDelegateProxy::GetIconDisplaySize(
BackgroundFetchDelegate::GetIconDisplaySizeCallback callback) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
if (auto* delegate = GetDelegate()) {
delegate->GetIconDisplaySize(std::move(callback));
} else {
std::move(callback).Run(gfx::Size(0, 0));
}
}
void BackgroundFetchDelegateProxy::GetPermissionForOrigin(
const url::Origin& origin,
RenderProcessHost* rph,
RenderFrameHostImpl* rfh,
GetPermissionForOriginCallback callback) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
// Permissions need to go through the DownloadRequestLimiter for top level
// frames. (This may be missing in unit tests.)
if (rfh && !rfh->GetParent() &&
rfh->GetBrowserContext()->GetDownloadManager()->GetDelegate()) {
WebContents::Getter web_contents_getter(base::BindRepeating(
[](GlobalRenderFrameHostId rfh_id) {
return WebContents::FromRenderFrameHost(
RenderFrameHost::FromID(rfh_id));
},
rfh->GetGlobalId()));
rfh->GetBrowserContext()
->GetDownloadManager()
->GetDelegate()
->CheckDownloadAllowed(
std::move(web_contents_getter), origin.GetURL(), "GET",
std::nullopt, /* from_download_cross_origin_redirect= */ false,
/* content_initiated= */ true, /* mime_type= */ std::string(),
/* page_transition= */ std::nullopt,
base::BindOnce(&BackgroundFetchDelegateProxy::
DidGetPermissionFromDownloadRequestLimiter,
weak_ptr_factory_.GetWeakPtr(),
std::move(callback)));
return;
}
BackgroundFetchPermission result = BackgroundFetchPermission::BLOCKED;
if (auto* controller = GetPermissionController()) {
blink::mojom::PermissionStatus permission_status =
blink::mojom::PermissionStatus::DENIED;
if (rfh) {
DCHECK(origin == rfh->GetLastCommittedOrigin());
permission_status = controller->GetPermissionStatusForCurrentDocument(
blink::PermissionType::BACKGROUND_FETCH, rfh);
} else if (rph) {
permission_status = controller->GetPermissionStatusForWorker(
blink::PermissionType::BACKGROUND_FETCH, rph, origin);
}
switch (permission_status) {
case blink::mojom::PermissionStatus::GRANTED:
result = BackgroundFetchPermission::ALLOWED;
break;
case blink::mojom::PermissionStatus::DENIED:
result = BackgroundFetchPermission::BLOCKED;
break;
case blink::mojom::PermissionStatus::ASK:
result = BackgroundFetchPermission::ASK;
break;
}
}
std::move(callback).Run(result);
}
void BackgroundFetchDelegateProxy::CreateDownloadJob(
base::WeakPtr<Controller> controller,
std::unique_ptr<BackgroundFetchDescription> fetch_description) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
DCHECK(!controller_map_.count(fetch_description->job_unique_id));
controller_map_[fetch_description->job_unique_id] = std::move(controller);
auto* delegate = GetDelegate();
if (delegate) {
delegate->CreateDownloadJob(weak_ptr_factory_.GetWeakPtr(),
std::move(fetch_description));
}
}
void BackgroundFetchDelegateProxy::StartRequest(
const std::string& job_unique_id,
const url::Origin& origin,
const scoped_refptr<BackgroundFetchRequestInfo>& request) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
DCHECK(controller_map_.count(job_unique_id));
DCHECK(request);
DCHECK(!request->download_guid().empty());
auto* delegate = GetDelegate();
if (!delegate)
return;
const blink::mojom::FetchAPIRequestPtr& fetch_request =
request->fetch_request();
const net::NetworkTrafficAnnotationTag traffic_annotation(
net::DefineNetworkTrafficAnnotation("background_fetch_context",
R"(
semantics {
sender: "Background Fetch API"
description:
"The Background Fetch API enables developers to upload or "
"download files on behalf of the user. Such fetches will yield "
"a user visible notification to inform the user of the "
"operation, through which it can be suspended, resumed and/or "
"cancelled. The developer retains control of the file once the "
"fetch is completed, similar to XMLHttpRequest and other "
"mechanisms for fetching resources using JavaScript."
trigger:
"When the website uses the Background Fetch API to request "
"fetching a file and/or a list of files. This is a Web "
"Platform API for which no express user permission is required."
data:
"The request headers and data as set by the website's "
"developer."
destination: WEBSITE
}
policy {
cookies_allowed: YES
cookies_store: "user"
setting: "This feature cannot be disabled in settings."
policy_exception_justification: "Not implemented."
})"));
// TODO(peter): The |headers| should be populated with all the properties
// set in the |fetch_request| structure.
net::HttpRequestHeaders headers;
for (const auto& pair : fetch_request->headers)
headers.SetHeader(pair.first, pair.second);
// Append the Origin header for requests whose CORS flag is set, or whose
// request method is not GET or HEAD. See section 3.1 of the standard:
// https://fetch.spec.whatwg.org/#origin-header
if (fetch_request->mode == network::mojom::RequestMode::kCors ||
fetch_request->mode ==
network::mojom::RequestMode::kCorsWithForcedPreflight ||
(fetch_request->method != "GET" && fetch_request->method != "HEAD")) {
headers.SetHeader("Origin", origin.Serialize());
}
delegate->DownloadUrl(
job_unique_id, request->download_guid(), fetch_request->method,
fetch_request->url, fetch_request->credentials_mode, traffic_annotation,
headers,
/* has_request_body= */ request->request_body_size() > 0u);
}
void BackgroundFetchDelegateProxy::UpdateUI(
const std::string& job_unique_id,
const std::optional<std::string>& title,
const std::optional<SkBitmap>& icon,
blink::mojom::BackgroundFetchRegistrationService::UpdateUICallback
update_ui_callback) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
DCHECK(!update_ui_callback_map_.count(job_unique_id));
update_ui_callback_map_.emplace(job_unique_id, std::move(update_ui_callback));
if (auto* delegate = GetDelegate())
delegate->UpdateUI(job_unique_id, title, icon);
}
void BackgroundFetchDelegateProxy::Abort(const std::string& job_unique_id) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
if (auto* delegate = GetDelegate())
delegate->Abort(job_unique_id);
}
void BackgroundFetchDelegateProxy::MarkJobComplete(
const std::string& job_unique_id) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
if (auto* delegate = GetDelegate())
delegate->MarkJobComplete(job_unique_id);
controller_map_.erase(job_unique_id);
}
void BackgroundFetchDelegateProxy::OnJobCancelled(
const std::string& job_unique_id,
const std::string& download_guid,
blink::mojom::BackgroundFetchFailureReason reason_to_abort) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
DCHECK(
reason_to_abort ==
blink::mojom::BackgroundFetchFailureReason::CANCELLED_FROM_UI ||
reason_to_abort ==
blink::mojom::BackgroundFetchFailureReason::DOWNLOAD_TOTAL_EXCEEDED);
auto it = controller_map_.find(job_unique_id);
if (it == controller_map_.end())
return;
if (const auto& controller = it->second) {
if (reason_to_abort ==
blink::mojom::BackgroundFetchFailureReason::DOWNLOAD_TOTAL_EXCEEDED) {
// Mark the request as complete and failed to avoid leaking information
// about the size of the resource.
controller->DidCompleteRequest(
download_guid,
std::make_unique<BackgroundFetchResult>(
nullptr /* response */, base::Time::Now(),
BackgroundFetchResult::FailureReason::FETCH_ERROR));
}
controller->AbortFromDelegate(reason_to_abort);
}
}
void BackgroundFetchDelegateProxy::OnDownloadStarted(
const std::string& job_unique_id,
const std::string& guid,
std::unique_ptr<BackgroundFetchResponse> response) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
auto it = controller_map_.find(job_unique_id);
if (it == controller_map_.end())
return;
if (const auto& controller = it->second)
controller->DidStartRequest(guid, std::move(response));
}
void BackgroundFetchDelegateProxy::OnUIActivated(
const std::string& job_unique_id) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
DCHECK(click_event_dispatcher_callback_);
click_event_dispatcher_callback_.Run(job_unique_id);
}
void BackgroundFetchDelegateProxy::OnUIUpdated(
const std::string& job_unique_id) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
auto it = update_ui_callback_map_.find(job_unique_id);
if (it == update_ui_callback_map_.end())
return;
DCHECK(it->second);
std::move(it->second).Run(blink::mojom::BackgroundFetchError::NONE);
update_ui_callback_map_.erase(it);
}
void BackgroundFetchDelegateProxy::OnDownloadUpdated(
const std::string& job_unique_id,
const std::string& guid,
uint64_t bytes_uploaded,
uint64_t bytes_downloaded) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
auto it = controller_map_.find(job_unique_id);
if (it == controller_map_.end())
return;
if (const auto& controller = it->second)
controller->DidUpdateRequest(guid, bytes_uploaded, bytes_downloaded);
}
void BackgroundFetchDelegateProxy::OnDownloadComplete(
const std::string& job_unique_id,
const std::string& guid,
std::unique_ptr<BackgroundFetchResult> result) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
auto it = controller_map_.find(job_unique_id);
if (it == controller_map_.end())
return;
if (const auto& controller = it->second)
controller->DidCompleteRequest(guid, std::move(result));
}
void BackgroundFetchDelegateProxy::GetUploadData(
const std::string& job_unique_id,
const std::string& download_guid,
BackgroundFetchDelegate::GetUploadDataCallback callback) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
auto it = controller_map_.find(job_unique_id);
if (it == controller_map_.end()) {
std::move(callback).Run(nullptr);
return;
}
if (const auto& controller = it->second)
controller->GetUploadData(download_guid, std::move(callback));
else
std::move(callback).Run(nullptr);
}
BrowserContext* BackgroundFetchDelegateProxy::GetBrowserContext() {
if (!storage_partition_)
return nullptr;
return storage_partition_->browser_context();
}
BackgroundFetchDelegate* BackgroundFetchDelegateProxy::GetDelegate() {
auto* browser_context = GetBrowserContext();
if (!browser_context)
return nullptr;
return browser_context->GetBackgroundFetchDelegate();
}
PermissionController* BackgroundFetchDelegateProxy::GetPermissionController() {
auto* browser_context = GetBrowserContext();
if (!browser_context)
return nullptr;
return browser_context->GetPermissionController();
}
void BackgroundFetchDelegateProxy::DidGetPermissionFromDownloadRequestLimiter(
GetPermissionForOriginCallback callback,
bool has_permission) {
DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
std::move(callback).Run(has_permission
? content::BackgroundFetchPermission::ALLOWED
: content::BackgroundFetchPermission::BLOCKED);
}
} // namespace content