FTP Transaction code for new Portable FTP(Patch SET-3)

net/ftp/ftp_network_transaction.h

 // Copyright (c) 2008 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_FTP_FTP_NETWORK_TRANSACTION_H_
 #define NET_FTP_FTP_NETWORK_TRANSACTION_H_
 
 #include "base/ref_counted.h"
 #include "base/scoped_ptr.h"
+#include "net/base/address_list.h"
+#include "net/base/host_resolver.h"
 #include "net/ftp/ftp_response_info.h"
 #include "net/ftp/ftp_transaction.h"
 
 namespace net {
 
 class ClientSocket;
 class ClientSocketFactory;
 class FtpNetworkSession;
 
 class FtpNetworkTransaction : public FtpTransaction {
  public:
-  FtpNetworkTransaction(
-      FtpNetworkSession* session, ClientSocketFactory* socket_factory);
-  ~FtpNetworkTransaction();
+  FtpNetworkTransaction(FtpNetworkSession* session,
+                        ClientSocketFactory* socket_factory);
+  virtual ~FtpNetworkTransaction();
 
   // FtpTransaction methods:
-  virtual void Destroy();
   virtual int Start(
       const FtpRequestInfo* request_info, CompletionCallback* callback);
+  virtual int Stop(int error);
   virtual int RestartWithAuth(
       const std::wstring& username, const std::wstring& password,
       CompletionCallback* callback);
-  virtual int Read(char* buf, int buf_len, CompletionCallback* callback);
+  virtual int RestartIgnoringLastError(CompletionCallback* callback);
+  virtual int Read(IOBuffer* buf, int buf_len,
+      CompletionCallback* callback);
   virtual const FtpResponseInfo* GetResponseInfo() const;
   virtual LoadState GetLoadState() const;
   virtual uint64 GetUploadProgress() const;
 
  private:
   void DoCallback(int result);
   void OnIOComplete(int result);
+  int GetRespnseCode();
+  int ProcessResponse(int response_code);
+  int ParsePasvResponse();
+
+  enum Command {
+    COMMAND_NONE,
+    COMMAND_USER,
+    COMMAND_PASS,
+    COMMAND_ACCT,
+    COMMAND_SYST,
+    COMMAND_TYPE,
+    COMMAND_PASV,
+    COMMAND_PWD,
+    COMMAND_SIZE,
+    COMMAND_RETR,
+    COMMAND_CWD,
+    COMMAND_LIST,
+    COMMAND_QUIT
+  };
+  Command command_sent_;
+
+  int SendFtpCommand(std::string& command, Command cmd);
+
+  enum ErrorClass {
+    ERROR_CLASS_INITIATED = 1,  // The requested action was initiated.
+    ERROR_CLASS_OK,             // The requested action successfully completed.
+    ERROR_CLASS_PENDING,        // The command accepted, but the
+                                // request on hold.
+    ERROR_CLASS_ERROR_RETRY,    // The command was not accepted and the
+                                // requested action did not take place,
+                                // but the error condition is temporary and the
+                                // action may be requested again.
+    ERROR_CLASS_ERROR,          // The command was not accepted and
+                                // the requested action did not take place.
+  };
+
+  ErrorClass GetErrorClass(int response_code) {
+    return (ErrorClass)(response_code / 100);
+  }
 
   // Runs the state transition loop.
   int DoLoop(int result);
 
   // Each of these methods corresponds to a State value.  Those with an input
   // argument receive the result from the previous state.  If a method returns
   // ERR_IO_PENDING, then the result from OnIOComplete will be passed to the
   // next state method as the result arg.
   int DoCtrlInit();
   int DoCtrlInitComplete(int result);
   int DoCtrlResolveHost();
   int DoCtrlResolveHostComplete(int result);
   int DoCtrlConnect();
   int DoCtrlConnectComplete(int result);
-  int DoCtrlWrite();
-  int DoCtrlWriteComplete(int result);
   int DoCtrlRead();
   int DoCtrlReadComplete(int result);
+  int DoCtrlWriteUSER();
+  int ProcessResponseUSER(int response_code);
+  int DoCtrlWritePASS();
+  int ProcessResponsePASS(int response_code);
+  int DoCtrlWriteACCT();
+  int ProcessResponseACCT(int response_code);
+  int DoCtrlWriteSYST();
+  int ProcessResponseSYST(int response_code);
+  int DoCtrlWritePWD();
+  int ProcessResponsePWD(int response_code);
+  int DoCtrlWriteTYPE();
+  int ProcessResponseTYPE(int response_code);
+  int DoCtrlWritePASV();
+  int ProcessResponsePASV(int response_code);
+  int DoCtrlWriteRETR();
+  int ProcessResponseRETR(int response_code);
+  int DoCtrlWriteSIZE();
+  int ProcessResponseSIZE(int response_code);
+  int DoCtrlWriteCWD();
+  int ProcessResponseCWD(int response_code);
+  int DoCtrlWriteLIST();
+  int ProcessResponseLIST(int response_code);
+  int DoCtrlWriteQUIT();
+  int ProcessResponseQUIT(int response_code);
+
   int DoDataConnect();
   int DoDataConnectComplete(int result);
   int DoDataRead();
   int DoDataReadComplete(int result);
 
   CompletionCallbackImpl<FtpNetworkTransaction> io_callback_;
   CompletionCallback* user_callback_;
 
   scoped_refptr<FtpNetworkSession> session_;
 
   const FtpRequestInfo* request_;
   FtpResponseInfo response_;
 
+  HostResolver resolver_;
+  AddressList addresses_;
+
+  // User buffer and length passed to the Read method.
+  scoped_refptr<IOBuffer> read_ctrl_buf_;
+  int read_ctrl_buf_size_;
+
+  IOBuffer* response_message_buf_;
+  int response_message_buf_len_;
+
+  IOBuffer* read_data_buf_;
+  int read_data_buf_len_;
+  int file_data_len_;
+
+  int last_error_;
+
+  std::string data_connection_ip_;
+  int data_connection_port_;
+
   ClientSocketFactory* socket_factory_;
+
   scoped_ptr<ClientSocket> ctrl_socket_;
   scoped_ptr<ClientSocket> data_socket_;
 
   enum State {
     // Control connection states:
     STATE_CTRL_INIT,
     STATE_CTRL_INIT_COMPLETE,
     STATE_CTRL_RESOLVE_HOST,
     STATE_CTRL_RESOLVE_HOST_COMPLETE,
     STATE_CTRL_CONNECT,
     STATE_CTRL_CONNECT_COMPLETE,
-    STATE_CTRL_WRITE,
-    STATE_CTRL_WRITE_COMPLETE,
     STATE_CTRL_READ,
     STATE_CTRL_READ_COMPLETE,
+    STATE_CTRL_WRITE_USER,
+    STATE_CTRL_WRITE_PASS,
+    STATE_CTRL_WRITE_ACCT,
+    STATE_CTRL_WRITE_SYST,
+    STATE_CTRL_WRITE_TYPE,
+    STATE_CTRL_WRITE_PASV,
+    STATE_CTRL_WRITE_PWD,
+    STATE_CTRL_WRITE_RETR,
+    STATE_CTRL_WRITE_SIZE,
+    STATE_CTRL_WRITE_CWD,
+    STATE_CTRL_WRITE_LIST,
+    STATE_CTRL_WRITE_QUIT,
     // Data connection states:
     STATE_DATA_CONNECT,
     STATE_DATA_CONNECT_COMPLETE,
     STATE_DATA_READ,
     STATE_DATA_READ_COMPLETE,
     STATE_NONE
   };
   State next_state_;
 };
 
 }  // namespace net
 
 #endif  // NET_FTP_FTP_NETWORK_TRANSACTION_H_