net/http/proxy_client_socket.h

   1 // Copyright (c) 2012 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_HTTP_PROXY_CLIENT_SOCKET_H_
   6 #define NET_HTTP_PROXY_CLIENT_SOCKET_H_
   7
   8 #include <string>
   9
  10 #include "net/socket/ssl_client_socket.h"
  11 #include "net/socket/stream_socket.h"
  12
  13 class GURL;
  14
  15 namespace net {
  16
  17 class HostPortPair;
  18 class HttpAuthController;
  19 class HttpStream;
  20 class HttpResponseInfo;
  21 class HttpRequestHeaders;
  22 struct HttpRequestInfo;
  23 class HttpAuthController;
  24
  25 class NET_EXPORT_PRIVATE ProxyClientSocket : public StreamSocket {
  26  public:
  27   ProxyClientSocket() {}
  28   ~ProxyClientSocket() override {}
  29
  30   // Returns the HttpResponseInfo (including HTTP Headers) from
  31   // the response to the CONNECT request.
  32   virtual const HttpResponseInfo* GetConnectResponseInfo() const = 0;
  33
  34   // Transfers ownership of a newly created HttpStream to the caller
  35   // which can be used to read the response body.
  36   virtual HttpStream* CreateConnectResponseStream() = 0;
  37
  38   // Returns the HttpAuthController which can be used
  39   // to interact with an HTTP Proxy Authorization Required (407) request.
  40   virtual const scoped_refptr<HttpAuthController>& GetAuthController() const
  41       = 0;
  42
  43   // If Connect (or its callback) returns PROXY_AUTH_REQUESTED, then
  44   // credentials should be added to the HttpAuthController before calling
  45   // RestartWithAuth.  Not all ProxyClientSocket implementations will be
  46   // restartable.  Such implementations should disconnect themselves and
  47   // return OK.
  48   virtual int RestartWithAuth(const CompletionCallback& callback) = 0;
  49
  50   // Returns true of the connection to the proxy is using SPDY.
  51   virtual bool IsUsingSpdy() const = 0;
  52
  53   // Returns the protocol negotiated with the proxy.
  54   virtual NextProto GetProtocolNegotiated() const = 0;
  55
  56  protected:
  57   // The HTTP CONNECT method for establishing a tunnel connection is documented
  58   // in draft-luotonen-web-proxy-tunneling-01.txt and RFC 2817, Sections 5.2
  59   // and 5.3.
  60   static void BuildTunnelRequest(const HostPortPair& endpoint,
  61                                  const HttpRequestHeaders& auth_headers,
  62                                  const std::string& user_agent,
  63                                  std::string* request_line,
  64                                  HttpRequestHeaders* request_headers);
  65
  66   // When an auth challenge (407 response) is received during tunnel
  67   // construction/ this method should be called.
  68   static int HandleProxyAuthChallenge(HttpAuthController* auth,
  69                                       HttpResponseInfo* response,
  70                                       const BoundNetLog& net_log);
  71
  72   // Logs (to the log and in a histogram) a blocked CONNECT response.
  73   static void LogBlockedTunnelResponse(int http_response_code,
  74                                        bool is_https_proxy);
  75
  76   // When a proxy authentication response is received during tunnel
  77   // construction, this method should be called to strip everything
  78   // but the auth header from the redirect response.  If it returns
  79   // false, the response should be discarded and tunnel construction should
  80   // fail.
  81   static bool SanitizeProxyAuth(HttpResponseInfo* response);
  82
  83   // When a redirect (e.g. 302 response) is received during tunnel
  84   // construction, this method should be called to strip everything
  85   // but the Location header from the redirect response.  If it returns
  86   // false, the response should be discarded and tunnel construction should
  87   // fail.
  88   static bool SanitizeProxyRedirect(HttpResponseInfo* response);
  89
  90  private:
  91   DISALLOW_COPY_AND_ASSIGN(ProxyClientSocket);
  92 };
  93
  94 }  // namespace net
  95
  96 #endif  // NET_HTTP_PROXY_CLIENT_SOCKET_H_