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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_H_
#define NET_PROXY_PROXY_RESOLVER_H_
#include "base/callback_forward.h"
#include "base/logging.h"
#include "base/memory/ref_counted.h"
#include "base/strings/string16.h"
#include "net/base/completion_callback.h"
#include "net/base/load_states.h"
#include "net/base/net_export.h"
#include "net/proxy/proxy_resolver_script_data.h"
#include "url/gurl.h"
namespace net {
class BoundNetLog;
class ProxyInfo;
// Interface for "proxy resolvers". A ProxyResolver fills in a list of proxies
// to use for a particular URL. Generally the backend for a ProxyResolver is
// a PAC script, but it doesn't need to be. ProxyResolver can service multiple
// requests at a time.
class NET_EXPORT_PRIVATE ProxyResolver {
public:
// Opaque pointer type, to return a handle to cancel outstanding requests.
typedef void* RequestHandle;
ProxyResolver() {}
virtual ~ProxyResolver() {}
// Gets a list of proxy servers to use for |url|. If the request will
// complete asynchronously returns ERR_IO_PENDING and notifies the result
// by running |callback|. If the result code is OK then
// the request was successful and |results| contains the proxy
// resolution information. In the case of asynchronous completion
// |*request| is written to, and can be passed to CancelRequest().
virtual int GetProxyForURL(const GURL& url,
ProxyInfo* results,
const CompletionCallback& callback,
RequestHandle* request,
const BoundNetLog& net_log) = 0;
// Cancels |request|.
virtual void CancelRequest(RequestHandle request) = 0;
// Gets the LoadState for |request|.
virtual LoadState GetLoadState(RequestHandle request) const = 0;
private:
DISALLOW_COPY_AND_ASSIGN(ProxyResolver);
};
} // namespace net
#endif // NET_PROXY_PROXY_RESOLVER_H_
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