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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 "android_webview/browser/net/aw_request_interceptor.h"
#include <utility>
#include "android_webview/browser/aw_contents_io_thread_client.h"
#include "android_webview/browser/input_stream.h"
#include "android_webview/browser/net/android_stream_reader_url_request_job.h"
#include "android_webview/browser/net/aw_web_resource_response.h"
#include "base/memory/weak_ptr.h"
#include "base/strings/string_number_conversions.h"
#include "base/supports_user_data.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/browser/resource_request_info.h"
#include "net/http/http_response_headers.h"
#include "net/url_request/url_request_job.h"
namespace android_webview {
namespace {
const void* const kRequestAlreadyHasJobDataKey = &kRequestAlreadyHasJobDataKey;
class StreamReaderJobDelegateImpl
: public AndroidStreamReaderURLRequestJob::Delegate {
public:
StreamReaderJobDelegateImpl(
scoped_ptr<AwWebResourceResponse> aw_web_resource_response)
: aw_web_resource_response_(std::move(aw_web_resource_response)) {
DCHECK(aw_web_resource_response_);
}
scoped_ptr<InputStream> OpenInputStream(JNIEnv* env,
const GURL& url) override {
return aw_web_resource_response_->GetInputStream(env);
}
void OnInputStreamOpenFailed(net::URLRequest* request,
bool* restart) override {
*restart = false;
}
bool GetMimeType(JNIEnv* env,
net::URLRequest* request,
android_webview::InputStream* stream,
std::string* mime_type) override {
return aw_web_resource_response_->GetMimeType(env, mime_type);
}
bool GetCharset(JNIEnv* env,
net::URLRequest* request,
android_webview::InputStream* stream,
std::string* charset) override {
return aw_web_resource_response_->GetCharset(env, charset);
}
void AppendResponseHeaders(JNIEnv* env,
net::HttpResponseHeaders* headers) override {
int status_code;
std::string reason_phrase;
if (aw_web_resource_response_->GetStatusInfo(
env, &status_code, &reason_phrase)) {
std::string status_line("HTTP/1.1 ");
status_line.append(base::IntToString(status_code));
status_line.append(" ");
status_line.append(reason_phrase);
headers->ReplaceStatusLine(status_line);
}
aw_web_resource_response_->GetResponseHeaders(env, headers);
}
private:
scoped_ptr<AwWebResourceResponse> aw_web_resource_response_;
};
class ShouldInterceptRequestAdaptor
: public AndroidStreamReaderURLRequestJob::DelegateObtainer {
public:
explicit ShouldInterceptRequestAdaptor(
scoped_ptr<AwContentsIoThreadClient> io_thread_client)
: io_thread_client_(std::move(io_thread_client)), weak_factory_(this) {}
~ShouldInterceptRequestAdaptor() override {}
void ObtainDelegate(net::URLRequest* request,
const Callback& callback) override {
callback_ = callback;
io_thread_client_->ShouldInterceptRequestAsync(
// The request is only used while preparing the call, not retained.
request,
base::Bind(&ShouldInterceptRequestAdaptor::WebResourceResponseObtained,
// The lifetime of the DelegateObtainer is managed by
// AndroidStreamReaderURLRequestJob, it might get deleted.
weak_factory_.GetWeakPtr()));
}
private:
void WebResourceResponseObtained(
scoped_ptr<AwWebResourceResponse> response) {
if (response) {
callback_.Run(make_scoped_ptr(
new StreamReaderJobDelegateImpl(std::move(response))));
} else {
callback_.Run(nullptr);
}
}
scoped_ptr<AwContentsIoThreadClient> io_thread_client_;
Callback callback_;
base::WeakPtrFactory<ShouldInterceptRequestAdaptor> weak_factory_;
DISALLOW_COPY_AND_ASSIGN(ShouldInterceptRequestAdaptor);
};
scoped_ptr<AwContentsIoThreadClient> GetCorrespondingIoThreadClient(
net::URLRequest* request) {
if (content::ResourceRequestInfo::OriginatedFromServiceWorker(request))
return AwContentsIoThreadClient::GetServiceWorkerIoThreadClient();
int render_process_id, render_frame_id;
if (!content::ResourceRequestInfo::GetRenderFrameForRequest(
request, &render_process_id, &render_frame_id)) {
return nullptr;
}
return AwContentsIoThreadClient::FromID(render_process_id, render_frame_id);
}
} // namespace
AwRequestInterceptor::AwRequestInterceptor() {}
AwRequestInterceptor::~AwRequestInterceptor() {}
net::URLRequestJob* AwRequestInterceptor::MaybeInterceptRequest(
net::URLRequest* request,
net::NetworkDelegate* network_delegate) const {
DCHECK_CURRENTLY_ON(content::BrowserThread::IO);
// MaybeInterceptRequest can be called multiple times for the same request.
if (request->GetUserData(kRequestAlreadyHasJobDataKey))
return nullptr;
scoped_ptr<AwContentsIoThreadClient> io_thread_client =
GetCorrespondingIoThreadClient(request);
if (!io_thread_client)
return nullptr;
GURL referrer(request->referrer());
if (referrer.is_valid() &&
(!request->is_pending() || request->is_redirecting())) {
request->SetExtraRequestHeaderByName(net::HttpRequestHeaders::kReferer,
referrer.spec(), true);
}
request->SetUserData(kRequestAlreadyHasJobDataKey,
new base::SupportsUserData::Data());
return new AndroidStreamReaderURLRequestJob(
request, network_delegate,
make_scoped_ptr(
new ShouldInterceptRequestAdaptor(std::move(io_thread_client))),
true);
}
} // namespace android_webview
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