PPAPI: Introduce PPB_NetworkProxy_Dev

content/browser/renderer_host/pepper/pepper_network_proxy_host.h

+// Copyright (c) 2013 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.
+
+#ifndef CONTENT_BROWSER_RENDERER_HOST_PEPPER_PEPPER_NETWORK_PROXY_HOST_H_
+#define CONTENT_BROWSER_RENDERER_HOST_PEPPER_PEPPER_NETWORK_PROXY_HOST_H_
+
+#include <queue>
+#include <string>
+
+#include "base/compiler_specific.h"
+#include "base/memory/weak_ptr.h"
+#include "content/common/content_export.h"
+#include "net/proxy/proxy_service.h"
+#include "ppapi/host/host_message_context.h"
+#include "ppapi/host/resource_host.h"
+
+namespace net {
+class ProxyInfo;
+class URLRequestContextGetter;
+}
+
+namespace ppapi {
+namespace host {
+struct ReplyMessageContext;
+}
+}
+
+namespace content {
+
+class BrowserPpapiHost;
+
+// The host for PPB_NetworkProxy. This class runs exclusively on the IO thread.
+class CONTENT_EXPORT PepperNetworkProxyHost : public ppapi::host::ResourceHost {
+ public:
+  PepperNetworkProxyHost(BrowserPpapiHost* host,
+                         PP_Instance instance,
+                         PP_Resource resource);
+
+  virtual ~PepperNetworkProxyHost();
+
+ private:
+  // We retrieve the appropriate URLRequestContextGetter on the UI thread
+  // and pass it to this function, which uses it to retrieve proxy_service_.
+  void DidGetURLRequestContextGetter(
+      scoped_refptr<net::URLRequestContextGetter> context_getter);
+
+  // ResourceHost implementation.
+  virtual int32_t OnResourceMessageReceived(
+      const IPC::Message& msg,
+      ppapi::host::HostMessageContext* context) OVERRIDE;
+
+  int32_t OnMsgGetProxyForURL(ppapi::host::HostMessageContext* context,
+                              const std::string& url);
+
+  // If we have a valid proxy_service_, send all messages in unsent_requests_.
+  void TryToSendUnsentRequests();
+
+  void OnResolveProxyCompleted(ppapi::host::ReplyMessageContext context,
+                               net::ProxyInfo* proxy_info,
+                               int result);
+  void SendFailureReply(int32_t error,
+                        ppapi::host::ReplyMessageContext context);
+
+  net::ProxyService* proxy_service_;
+  bool waiting_for_proxy_service_;
+
+  // We have to get the URLRequestContextGetter from the UI thread before we
+  // can retrieve proxy_service_. If we receive any calls for GetProxyForURL
+  // before proxy_service_ is available, we save them in unsent_requests_.
+  struct UnsentRequest {
+    GURL url;
+    ppapi::host::ReplyMessageContext reply_context;
+  };
+  std::queue<UnsentRequest> unsent_requests_;
+
+  // Requests awaiting a response from ProxyService. We need to store these so
+  // that we can cancel them if we get destroyed.
+  std::queue<net::ProxyService::PacRequest*> pending_requests_;
+
+  base::WeakPtrFactory<PepperNetworkProxyHost> weak_factory_;
+
+  DISALLOW_COPY_AND_ASSIGN(PepperNetworkProxyHost);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_BROWSER_RENDERER_HOST_PEPPER_PEPPER_NETWORK_PROXY_HOST_H_