net/proxy/proxy_resolver_v8.h

   1 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef NET_PROXY_PROXY_RESOLVER_V8_H_
   6 #define NET_PROXY_PROXY_RESOLVER_V8_H_
   7
   8 #include "base/compiler_specific.h"
   9 #include "base/memory/scoped_ptr.h"
  10 #include "net/base/net_export.h"
  11 #include "net/proxy/proxy_resolver.h"
  12
  13 namespace net {
  14
  15 // Implementation of ProxyResolver that uses V8 to evaluate PAC scripts.
  16 class NET_EXPORT_PRIVATE ProxyResolverV8 : public ProxyResolver {
  17  public:
  18   // Interface for the javascript bindings.
  19   class NET_EXPORT_PRIVATE JSBindings {
  20    public:
  21     enum ResolveDnsOperation {
  22       DNS_RESOLVE,
  23       DNS_RESOLVE_EX,
  24       MY_IP_ADDRESS,
  25       MY_IP_ADDRESS_EX,
  26     };
  27
  28     JSBindings() {}
  29
  30     // Handler for "dnsResolve()", "dnsResolveEx()", "myIpAddress()",
  31     // "myIpAddressEx()". Returns true on success and fills |*output| with the
  32     // result. If |*terminate| is set to true, then the script execution will
  33     // be aborted. Note that termination may not happen right away.
  34     virtual bool ResolveDns(const std::string& host,
  35                             ResolveDnsOperation op,
  36                             std::string* output,
  37                             bool* terminate) = 0;
  38
  39     // Handler for "alert(message)"
  40     virtual void Alert(const base::string16& message) = 0;
  41
  42     // Handler for when an error is encountered. |line_number| may be -1
  43     // if a line number is not applicable to this error.
  44     virtual void OnError(int line_number, const base::string16& error) = 0;
  45
  46    protected:
  47     virtual ~JSBindings() {}
  48   };
  49
  50   // Constructs a ProxyResolverV8.
  51   ProxyResolverV8();
  52
  53   ~ProxyResolverV8() override;
  54
  55   JSBindings* js_bindings() const { return js_bindings_; }
  56   void set_js_bindings(JSBindings* js_bindings) { js_bindings_ = js_bindings; }
  57
  58   // ProxyResolver implementation:
  59   int GetProxyForURL(const GURL& url,
  60                      ProxyInfo* results,
  61                      const CompletionCallback& /*callback*/,
  62                      RequestHandle* /*request*/,
  63                      const BoundNetLog& net_log) override;
  64   void CancelRequest(RequestHandle request) override;
  65   LoadState GetLoadState(RequestHandle request) const override;
  66   void CancelSetPacScript() override;
  67   int SetPacScript(const scoped_refptr<ProxyResolverScriptData>& script_data,
  68                    const CompletionCallback& /*callback*/) override;
  69
  70   // Get total/ued heap memory usage of all v8 instances used by the proxy
  71   // resolver.
  72   static size_t GetTotalHeapSize();
  73   static size_t GetUsedHeapSize();
  74
  75  private:
  76   // Context holds the Javascript state for the most recently loaded PAC
  77   // script. It corresponds with the data from the last call to
  78   // SetPacScript().
  79   class Context;
  80
  81   scoped_ptr<Context> context_;
  82
  83   JSBindings* js_bindings_;
  84
  85   DISALLOW_COPY_AND_ASSIGN(ProxyResolverV8);
  86 };
  87
  88 }  // namespace net
  89
  90 #endif  // NET_PROXY_PROXY_RESOLVER_V8_H_