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// Copyright (c) 2012 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.
#include "chrome/browser/android/intercept_download_resource_throttle.h"
#include "base/feature_list.h"
#include "base/metrics/histogram_macros.h"
#include "chrome/browser/android/chrome_feature_list.h"
#include "components/data_reduction_proxy/core/common/data_reduction_proxy_headers.h"
#include "content/public/browser/android/download_controller_android.h"
#include "content/public/browser/resource_controller.h"
#include "net/http/http_request_headers.h"
#include "net/http/http_response_headers.h"
#include "net/url_request/url_request.h"
namespace {
// UMA histogram for tracking reasons that chrome fails to intercept the
// download. Keep this in sync with MobileDownloadInterceptFailureReasons in
// histograms.xml.
enum MobileDownloadInterceptFailureReason {
NO_FAILURE = 0,
EMPTY_URL,
NON_HTTP_OR_HTTPS,
NON_GET_METHODS,
NO_REQUEST_HEADERS,
USE_HTTP_AUTH,
USE_CHANNEL_BOUND_COOKIES,
// FAILURE_REASON_SIZE should always be last - this is a count of the number
// of items in this enum.
FAILURE_REASON_SIZE,
};
void RecordInterceptFailureReasons(
MobileDownloadInterceptFailureReason reason) {
UMA_HISTOGRAM_ENUMERATION("MobileDownload.InterceptFailureReason",
reason,
FAILURE_REASON_SIZE);
}
} // namespace
namespace chrome {
// static
bool InterceptDownloadResourceThrottle::IsDownloadInterceptionEnabled() {
return base::FeatureList::IsEnabled(chrome::android::kSystemDownloadManager);
}
InterceptDownloadResourceThrottle::InterceptDownloadResourceThrottle(
net::URLRequest* request,
int render_process_id,
int render_view_id,
int request_id)
: request_(request),
render_process_id_(render_process_id),
render_view_id_(render_view_id),
request_id_(request_id) {
}
InterceptDownloadResourceThrottle::~InterceptDownloadResourceThrottle() {
}
void InterceptDownloadResourceThrottle::WillProcessResponse(bool* defer) {
ProcessDownloadRequest();
}
const char* InterceptDownloadResourceThrottle::GetNameForLogging() const {
return "InterceptDownloadResourceThrottle";
}
void InterceptDownloadResourceThrottle::ProcessDownloadRequest() {
if (!IsDownloadInterceptionEnabled())
return;
if (request_->url_chain().empty()) {
RecordInterceptFailureReasons(EMPTY_URL);
return;
}
GURL url = request_->url_chain().back();
if (!url.SchemeIsHTTPOrHTTPS()) {
RecordInterceptFailureReasons(NON_HTTP_OR_HTTPS);
return;
}
if (request_->method() != net::HttpRequestHeaders::kGetMethod) {
RecordInterceptFailureReasons(NON_GET_METHODS);
return;
}
net::HttpRequestHeaders headers;
if (!request_->GetFullRequestHeaders(&headers)) {
RecordInterceptFailureReasons(NO_REQUEST_HEADERS);
return;
}
// In general, if the request uses HTTP authorization, either with the origin
// or a proxy, then the network stack should handle the download. The one
// exception is a request that is fetched via the Chrome Proxy and does not
// authenticate with the origin.
if (request_->response_info().did_use_http_auth) {
if (headers.HasHeader(net::HttpRequestHeaders::kAuthorization) ||
!(request_->response_info().headers.get() &&
data_reduction_proxy::HasDataReductionProxyViaHeader(
request_->response_info().headers.get(), NULL))) {
RecordInterceptFailureReasons(USE_HTTP_AUTH);
return;
}
}
// If the cookie is possibly channel-bound, don't pass it to android download
// manager.
// TODO(qinmin): add a test for this. http://crbug.com/430541.
if (request_->ssl_info().channel_id_sent) {
RecordInterceptFailureReasons(USE_CHANNEL_BOUND_COOKIES);
return;
}
content::DownloadControllerAndroid::Get()->CreateGETDownload(
render_process_id_, render_view_id_, request_id_);
controller()->Cancel();
RecordInterceptFailureReasons(NO_FAILURE);
}
} // namespace chrome
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