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// Copyright 2014 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_BASE_PROXY_DELEGATE_H_
#define NET_BASE_PROXY_DELEGATE_H_
#include <string>
#include "base/macros.h"
#include "net/base/net_errors.h"
#include "net/base/net_export.h"
#include "net/proxy_resolution/proxy_retry_info.h"
class GURL;
namespace net {
class HttpRequestHeaders;
class HttpResponseHeaders;
class ProxyInfo;
class ProxyServer;
// Delegate for setting up a connection.
class NET_EXPORT ProxyDelegate {
public:
ProxyDelegate() {
}
virtual ~ProxyDelegate() {
}
// Called as the proxy is being resolved for |url| for a |method| request.
// The caller may pass an empty string to get method agnostic resoulution.
// Allows the delegate to override the proxy resolution decision made by
// ProxyResolutionService. The delegate may override the decision by modifying
// the ProxyInfo |result|.
virtual void OnResolveProxy(const GURL& url,
const std::string& method,
const ProxyRetryInfoMap& proxy_retry_info,
ProxyInfo* result) = 0;
// Called when use of |bad_proxy| fails due to |net_error|. |net_error| is
// the network error encountered, if any, and OK if the fallback was
// for a reason other than a network error (e.g. the proxy service was
// explicitly directed to skip a proxy).
virtual void OnFallback(const ProxyServer& bad_proxy,
int net_error) = 0;
// Called immediately before a HTTP/1.x proxy tunnel request is sent.
// Provides the embedder an opportunity to add extra request headers.
// Not called for HTTP/2 or QUIC tunnels.
virtual void OnBeforeHttp1TunnelRequest(
const ProxyServer& proxy_server,
HttpRequestHeaders* extra_headers) = 0;
// Called when the response headers for the HTTP/1.x proxy tunnel request
// have been received. Allows the delegate to override the net error code of
// the tunnel request. Returning OK causes the standard tunnel response
// handling to be performed. Implementations should make sure they can trust
// |proxy_server| before making decisions based on |response_headers|.
// Not called for HTTP/2 or QUIC tunnels.
virtual Error OnHttp1TunnelHeadersReceived(
const ProxyServer& proxy_server,
const HttpResponseHeaders& response_headers) = 0;
private:
DISALLOW_COPY_AND_ASSIGN(ProxyDelegate);
};
} // namespace net
#endif // NET_BASE_PROXY_DELEGATE_H_
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