88 lines
2.6 KiB
C++
88 lines
2.6 KiB
C++
// Copyright (c) 2015 GitHub, Inc.
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// Use of this source code is governed by the MIT license that can be
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// found in the LICENSE file.
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#ifndef ATOM_BROWSER_NET_JS_ASKER_H_
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#define ATOM_BROWSER_NET_JS_ASKER_H_
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#include "base/callback.h"
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#include "base/memory/weak_ptr.h"
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#include "base/values.h"
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#include "content/public/browser/browser_thread.h"
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#include "net/base/net_errors.h"
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#include "net/url_request/url_request_job.h"
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#include "v8/include/v8.h"
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namespace atom {
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using JavaScriptHandler =
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base::Callback<void(const net::URLRequest*, v8::Local<v8::Value>)>;
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namespace internal {
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using ResponseCallback =
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base::Callback<void(bool, scoped_ptr<base::Value> options)>;
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// Ask handler for options in UI thread.
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void AskForOptions(v8::Isolate* isolate,
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const JavaScriptHandler& handler,
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net::URLRequest* request,
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const ResponseCallback& callback);
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// Test whether the |options| means an error.
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bool IsErrorOptions(base::Value* value, int* error);
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} // namespace internal
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template<typename RequestJob>
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class JsAsker : public RequestJob {
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public:
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JsAsker(net::URLRequest* request,
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net::NetworkDelegate* network_delegate,
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v8::Isolate* isolate,
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const JavaScriptHandler& handler)
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: RequestJob(request, network_delegate),
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isolate_(isolate),
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handler_(handler),
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weak_factory_(this) {}
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// Subclass should do initailze work here.
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virtual void StartAsync(scoped_ptr<base::Value> options) {
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RequestJob::Start();
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}
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private:
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// RequestJob:
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void Start() override {
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content::BrowserThread::PostTask(
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content::BrowserThread::UI, FROM_HERE,
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base::Bind(&internal::AskForOptions,
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isolate_,
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handler_,
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RequestJob::request(),
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base::Bind(&JsAsker::OnResponse,
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weak_factory_.GetWeakPtr())));
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}
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// Called when the JS handler has sent the response, we need to decide whether
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// to start, or fail the job.
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void OnResponse(bool success, scoped_ptr<base::Value> value) {
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int error = net::ERR_NOT_IMPLEMENTED;
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if (success && value && !internal::IsErrorOptions(value.get(), &error)) {
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StartAsync(value.Pass());
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} else {
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RequestJob::NotifyStartError(
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net::URLRequestStatus(net::URLRequestStatus::FAILED, error));
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}
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}
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v8::Isolate* isolate_;
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JavaScriptHandler handler_;
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base::WeakPtrFactory<JsAsker> weak_factory_;
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DISALLOW_COPY_AND_ASSIGN(JsAsker);
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};
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} // namespace atom
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#endif // ATOM_BROWSER_NET_JS_ASKER_H_
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