proxy_resolver_v8.h revision 5821806d5e7f356e8fa4b058a389a808ea183019
15821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Copyright (c) 2011 The Chromium Authors. All rights reserved. 25821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Use of this source code is governed by a BSD-style license that can be 35821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// found in the LICENSE file. 45821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 55821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#ifndef NET_PROXY_PROXY_RESOLVER_V8_H_ 65821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define NET_PROXY_PROXY_RESOLVER_V8_H_ 75821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 85821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/compiler_specific.h" 95821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/memory/scoped_ptr.h" 105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "net/base/net_export.h" 115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "net/proxy/proxy_resolver.h" 125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)namespace net { 145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)class ProxyResolverJSBindings; 165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Implementation of ProxyResolver that uses V8 to evaluate PAC scripts. 185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// 195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// ---------------------------------------------------------------------------- 205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// !!! Important note on threading model: 215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// ---------------------------------------------------------------------------- 225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// There can be only one instance of V8 running at a time. To enforce this 235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// constraint, ProxyResolverV8 holds a v8::Locker during execution. Therefore 245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// it is OK to run multiple instances of ProxyResolverV8 on different threads, 255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// since only one will be running inside V8 at a time. 265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// 275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// It is important that *ALL* instances of V8 in the process be using 285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// v8::Locker. If not there can be race conditions between the non-locked V8 295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// instances and the locked V8 instances used by ProxyResolverV8 (assuming they 305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// run on different threads). 315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// 325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// This is the case with the V8 instance used by chromium's renderer -- it runs 335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// on a different thread from ProxyResolver (renderer thread vs PAC thread), 345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// and does not use locking since it expects to be alone. 355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)class NET_EXPORT_PRIVATE ProxyResolverV8 : public ProxyResolver { 365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) public: 375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Constructs a ProxyResolverV8 with custom bindings. ProxyResolverV8 takes 385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // ownership of |custom_js_bindings| and deletes it when ProxyResolverV8 395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // is destroyed. 405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) explicit ProxyResolverV8(ProxyResolverJSBindings* custom_js_bindings); 415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) virtual ~ProxyResolverV8(); 435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ProxyResolverJSBindings* js_bindings() const { return js_bindings_.get(); } 455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // ProxyResolver implementation: 475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) virtual int GetProxyForURL(const GURL& url, 485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ProxyInfo* results, 495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const net::CompletionCallback& /*callback*/, 505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) RequestHandle* /*request*/, 515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const BoundNetLog& net_log) OVERRIDE; 525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) virtual void CancelRequest(RequestHandle request) OVERRIDE; 535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) virtual LoadState GetLoadState(RequestHandle request) const OVERRIDE; 545821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) virtual LoadState GetLoadStateThreadSafe( 555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) RequestHandle request) const OVERRIDE; 565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) virtual void CancelSetPacScript() OVERRIDE; 575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) virtual void PurgeMemory() OVERRIDE; 585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) virtual void Shutdown() OVERRIDE; 595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) virtual int SetPacScript( 605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const scoped_refptr<ProxyResolverScriptData>& script_data, 615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const net::CompletionCallback& /*callback*/) OVERRIDE; 625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) private: 645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Context holds the Javascript state for the most recently loaded PAC 655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // script. It corresponds with the data from the last call to 665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // SetPacScript(). 675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) class Context; 685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) scoped_ptr<Context> context_; 695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) scoped_ptr<ProxyResolverJSBindings> js_bindings_; 715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 725821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DISALLOW_COPY_AND_ASSIGN(ProxyResolverV8); 735821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)}; 745821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 755821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} // namespace net 765821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 775821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#endif // NET_PROXY_PROXY_RESOLVER_V8_H_ 78