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// Copyright (c) 2011 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 NET_PROXY_PROXY_RESOLVER_V8_H_
#define NET_PROXY_PROXY_RESOLVER_V8_H_
#include "base/compiler_specific.h"
#include "base/memory/ref_counted.h"
#include "base/memory/scoped_ptr.h"
#include "base/strings/string16.h"
#include "net/base/net_export.h"
class GURL;
namespace net {
class ProxyInfo;
class ProxyResolverScriptData;
// A synchronous ProxyResolver-like that uses V8 to evaluate PAC scripts.
class NET_EXPORT_PRIVATE ProxyResolverV8 {
public:
// Interface for the javascript bindings.
class NET_EXPORT_PRIVATE JSBindings {
public:
enum ResolveDnsOperation {
DNS_RESOLVE,
DNS_RESOLVE_EX,
MY_IP_ADDRESS,
MY_IP_ADDRESS_EX,
};
JSBindings() {}
// Handler for "dnsResolve()", "dnsResolveEx()", "myIpAddress()",
// "myIpAddressEx()". Returns true on success and fills |*output| with the
// result. If |*terminate| is set to true, then the script execution will
// be aborted. Note that termination may not happen right away.
virtual bool ResolveDns(const std::string& host,
ResolveDnsOperation op,
std::string* output,
bool* terminate) = 0;
// Handler for "alert(message)"
virtual void Alert(const base::string16& message) = 0;
// Handler for when an error is encountered. |line_number| may be -1
// if a line number is not applicable to this error.
virtual void OnError(int line_number, const base::string16& error) = 0;
protected:
virtual ~JSBindings() {}
};
// Constructs a ProxyResolverV8.
static int Create(const scoped_refptr<ProxyResolverScriptData>& script_data,
JSBindings* bindings,
scoped_ptr<ProxyResolverV8>* resolver);
~ProxyResolverV8();
int GetProxyForURL(const GURL& url, ProxyInfo* results, JSBindings* bindings);
// Get total/ued heap memory usage of all v8 instances used by the proxy
// resolver.
static size_t GetTotalHeapSize();
static size_t GetUsedHeapSize();
private:
// Context holds the Javascript state for the PAC script.
class Context;
explicit ProxyResolverV8(scoped_ptr<Context> context);
scoped_ptr<Context> context_;
DISALLOW_COPY_AND_ASSIGN(ProxyResolverV8);
};
} // namespace net
#endif // NET_PROXY_PROXY_RESOLVER_V8_H_
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