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Access an FTP Site - Receipe problem
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<blockquote data-quote="garcon" data-source="post: 3607" data-attributes="member: 1398"><p>Folks,</p><p></p><p>This is a recipe for accessing an FTP site. I having problems with the "Send" method and th "IPAddress" method - my compiler says: "<span style="font-size: 10px">Name Send is not declared" and "<span style="font-size: 10px">Name IPAddress is not declared"</span></span></p><p></p><p><span style="font-size: 10px"><span style="font-size: 10px">Can anyone make any intelligent suggestions please?</span></span></p><p></p><p><span style="font-size: 10px"><span style="font-size: 10px">**** CODE AS FOLLOWS ****</span></span></p><p></p><p></p><p><span style="font-size: 10px"><span style="font-size: 10px"><span style="font-size: 10px"><span style="color: #0000ff"></span></span></span></span></p><p><span style="font-size: 10px"><span style="font-size: 10px"><span style="font-size: 10px"><span style="color: #0000ff"></span></span></span></span>[CODE] </p><p></p><p>[size=2][color=#0000ff]Public[/color][/size][size=2][color=#0000ff]Class[/color][/size][size=2] FtpClient</p><p></p><p>[/size][size=2][color=#0000ff]Inherits[/color][/size][size=2] System.ComponentModel.Component</p><p></p><p>[/size][size=2][color=#008000]'The internal TCP connection</p><p></p><p>[/color][/size][size=2][color=#0000ff]Private[/color][/size][size=2] Client [/size][size=2][color=#0000ff]As[/color][/size][size=2][color=#0000ff]New[/color][/size][size=2] System.Net.Sockets.TcpClient</p><p></p><p>[/size][size=2][color=#0000ff]Private[/color][/size][size=2] Stream [/size][size=2][color=#0000ff]As[/color][/size][size=2] System.Net.Sockets.NetworkStream</p><p></p><p></p><p></p><p>[/size][size=2][color=#008000]'The connection state</p><p></p><p>[/color][/size][size=2][color=#0000ff]Private[/color][/size][size=2] _Connected [/size][size=2][color=#0000ff]As[/color][/size][size=2][color=#0000ff]Boolean[/color][/size][size=2] = [/size][size=2][color=#0000ff]False</p><p></p><p>[/color][/size][size=2][color=#0000ff]Public[/color][/size][size=2][color=#0000ff]ReadOnly[/color][/size][size=2][color=#0000ff]Property[/color][/size][size=2] Connected() [/size][size=2][color=#0000ff]As[/color][/size][size=2][color=#0000ff]Boolean</p><p></p><p>[/color][/size][size=2][color=#0000ff]Get</p><p></p><p>[/color][/size][size=2][color=#0000ff]Return[/color][/size][size=2] _Connected</p><p></p><p>[/size][size=2][color=#0000ff]End[/color][/size][size=2][color=#0000ff]Get</p><p></p><p>[/color][/size][size=2][color=#0000ff]End[/color][/size][size=2][color=#0000ff]Property</p><p></p><p></p><p></p><p>[/color][/size][size=2][color=#008000]'Some command constants</p><p></p><p>[/color][/size][size=2][color=#0000ff]Private[/color][/size][size=2][color=#0000ff]Class[/color][/size][size=2] Commands</p><p></p><p>[/size][size=2][color=#0000ff]Public[/color][/size][size=2][color=#0000ff]Const[/color][/size][size=2] User [/size][size=2][color=#0000ff]As[/color][/size][size=2][color=#0000ff]String[/color][/size][size=2] = "USER "</p><p></p><p>[/size][size=2][color=#0000ff]Public[/color][/size][size=2][color=#0000ff]Const[/color][/size][size=2] Password [/size][size=2][color=#0000ff]As[/color][/size][size=2][color=#0000ff]String[/color][/size][size=2] = "PASS "</p><p></p><p>[/size][size=2][color=#0000ff]Public[/color][/size][size=2][color=#0000ff]Const[/color][/size][size=2] Quit [/size][size=2][color=#0000ff]As[/color][/size][size=2][color=#0000ff]String[/color][/size][size=2] = "QUIT" & vbNewLine</p><p></p><p>[/size][size=2][color=#0000ff]Public[/color][/size][size=2][color=#0000ff]Const[/color][/size][size=2] GetFile [/size][size=2][color=#0000ff]As[/color][/size][size=2][color=#0000ff]String[/color][/size][size=2] = "RETR "</p><p></p><p>[/size][size=2][color=#0000ff]Public[/color][/size][size=2][color=#0000ff]Const[/color][/size][size=2] UsePassiveMode [/size][size=2][color=#0000ff]As[/color][/size][size=2][color=#0000ff]String[/color][/size][size=2] = "PASV" & vbNewLine</p><p></p><p>[/size][size=2][color=#0000ff]Public[/color][/size][size=2][color=#0000ff]Const[/color][/size][size=2] UseBinary [/size][size=2][color=#0000ff]As[/color][/size][size=2][color=#0000ff]String[/color][/size][size=2] = "TYPE I" & vbNewLine</p><p></p><p>[/size][size=2][color=#0000ff]Public[/color][/size][size=2][color=#0000ff]Const[/color][/size][size=2] UseAscii [/size][size=2][color=#0000ff]As[/color][/size][size=2][color=#0000ff]String[/color][/size][size=2] = "TYPE A" & vbNewLine</p><p></p><p>[/size][size=2][color=#0000ff]End[/color][/size][size=2][color=#0000ff]Class</p><p></p><p></p><p></p><p>[/color][/size][size=2][color=#0000ff]Private[/color][/size][size=2][color=#0000ff]Enum[/color][/size][size=2] ReturnCodes</p><p></p><p>ServiceReady = 220</p><p></p><p>Accepted = 200</p><p></p><p>PasswordRequired = 331</p><p></p><p>UserLoggedIn = 230</p><p></p><p>EnteringPassivemode = 227</p><p></p><p>StartingTransferAlreadyOpen = 125</p><p></p><p>StartingTransferOpening = 150</p><p></p><p>TransferComplete = 226</p><p></p><p>[/size][size=2][color=#0000ff]End[/color][/size][size=2][color=#0000ff]Enum</p><p></p><p>[/color][/size][size=2][color=#0000ff]Private[/color][/size][size=2][color=#0000ff]Function[/color][/size][size=2] GetResponse() [/size][size=2][color=#0000ff]As[/color][/size][size=2][color=#0000ff]String</p><p></p><p>[/color][/size][size=2][color=#008000]'Retrieve all available lines</p><p></p><p>[/color][/size][size=2][color=#0000ff]Dim[/color][/size][size=2] Character [/size][size=2][color=#0000ff]As[/color][/size][size=2][color=#0000ff]String</p><p></p><p>[/color][/size][size=2][color=#0000ff]Dim[/color][/size][size=2] Response [/size][size=2][color=#0000ff]As[/color][/size][size=2][color=#0000ff]String[/color][/size][size=2] = ""</p><p></p><p>[/size][size=2][color=#0000ff]Do</p><p></p><p>[/color][/size][size=2][color=#0000ff]Do</p><p></p><p>[/color][/size][size=2]Character = Chr(Stream.ReadByte()).ToString()</p><p></p><p>Response &= Character</p><p></p><p>[/size][size=2][color=#0000ff]Loop[/color][/size][size=2][color=#0000ff]Until[/color][/size][size=2] Character = Chr(10)</p><p></p><p>[/size][size=2][color=#0000ff]Loop[/color][/size][size=2][color=#0000ff]While[/color][/size][size=2] Stream.DataAvailable</p><p></p><p>Response = Response.Trim([/size][size=2][color=#0000ff]New[/color][/size][size=2][color=#0000ff]Char[/color][/size][size=2]() {Chr(13), Chr(10)})</p><p></p><p>System.Diagnostics.Debug.WriteLine(Response)</p><p></p><p>[/size][size=2][color=#0000ff]Return[/color][/size][size=2] Response</p><p></p><p>[/size][size=2][color=#0000ff]End[/color][/size][size=2][color=#0000ff]Function</p><p></p><p>[/color][/size][size=2][color=#0000ff]Private[/color][/size][size=2][color=#0000ff]Function[/color][/size][size=2] CheckCode([/size][size=2][color=#0000ff]ByVal[/color][/size][size=2] response [/size][size=2][color=#0000ff]As[/color][/size][size=2][color=#0000ff]String[/color][/size][size=2], [/size][size=2][color=#0000ff]ByVal[/color][/size][size=2] expectedCode [/size][size=2][color=#0000ff]As[/color][/size][size=2] ReturnCodes) [/size][size=2][color=#0000ff]As[/color][/size][size=2][color=#0000ff]Boolean</p><p></p><p>[/color][/size][size=2][color=#0000ff]Return[/color][/size][size=2] Val(response.Substring(0, 3)) = expectedCode</p><p></p><p>[/size][size=2][color=#0000ff]End[/color][/size][size=2][color=#0000ff]Function</p><p></p><p>[/color][/size][size=2][color=#0000ff]Public[/color][/size][size=2][color=#0000ff]Sub[/color][/size][size=2] Connect([/size][size=2][color=#0000ff]ByVal[/color][/size][size=2] serverName [/size][size=2][color=#0000ff]As[/color][/size][size=2][color=#0000ff]String[/color][/size][size=2], [/size][size=2][color=#0000ff]ByVal[/color][/size][size=2] userName [/size][size=2][color=#0000ff]As[/color][/size][size=2][color=#0000ff]String[/color][/size][size=2], [/size][size=2][color=#0000ff]ByVal[/color][/size][size=2] password [/size][size=2][color=#0000ff]As[/color][/size][size=2][color=#0000ff]String[/color][/size][size=2])</p><p></p><p>[/size][size=2][color=#0000ff]If[/color][/size][size=2] Connected [/size][size=2][color=#0000ff]Then[/color][/size][size=2][color=#0000ff]Me[/color][/size][size=2].Disconnect()</p><p></p><p>[/size][size=2][color=#008000]'Connect to POP3 server</p><p></p><p>[/color][/size][size=2][color=#008000]'which is always at port 21)</p><p></p><p>[/color][/size][size=2]Client.Connect(serverName, 21)</p><p></p><p>Stream = Client.GetStream()</p><p></p><p>[/size][size=2][color=#008000]'Send user name</p><p></p><p>[/color][/size][size=2][color=#0000ff]Dim[/color][/size][size=2] Response [/size][size=2][color=#0000ff]As[/color][/size][size=2][color=#0000ff]String</p><p></p><p>[/color][/size][size=2]Response = GetResponse()</p><p></p><p>Response = Send(Commands.User & userName & vbNewLine)</p><p></p><p>[/size][size=2][color=#0000ff]If[/color][/size][size=2] CheckCode(Response, ReturnCodes.PasswordRequired) [/size][size=2][color=#0000ff]Then</p><p></p><p>[/color][/size][size=2][color=#008000]'Send password</p><p></p><p>[/color][/size][size=2]Response = Send(Commands.Password & password & vbNewLine)</p><p></p><p>[/size][size=2][color=#0000ff]End[/color][/size][size=2][color=#0000ff]If</p><p></p><p>[/color][/size][size=2][color=#0000ff]If[/color][/size][size=2][color=#0000ff]Not[/color][/size][size=2] (CheckCode(Response, ReturnCodes.UserLoggedIn)) [/size][size=2][color=#0000ff]And[/color][/size][size=2][color=#0000ff]Not[/color][/size][size=2] (CheckCode(Response, ReturnCodes.ServiceReady)) [/size][size=2][color=#0000ff]Then</p><p></p><p>[/color][/size][size=2][color=#0000ff]Throw[/color][/size][size=2][color=#0000ff]New[/color][/size][size=2] ApplicationException("Could not log in")</p><p></p><p>[/size][size=2][color=#0000ff]End[/color][/size][size=2][color=#0000ff]If</p><p></p><p>[/color][/size][size=2]_Connected = [/size][size=2][color=#0000ff]True</p><p></p><p>[/color][/size][size=2][color=#0000ff]End[/color][/size][size=2][color=#0000ff]Sub</p><p></p><p>[/color][/size][size=2][color=#0000ff]Public[/color][/size][size=2][color=#0000ff]Sub[/color][/size][size=2] Disconnect()</p><p></p><p>[/size][size=2][color=#0000ff]If[/color][/size][size=2] Connected [/size][size=2][color=#0000ff]Then</p><p></p><p>[/color][/size][size=2][color=#0000ff]If[/color][/size][size=2][color=#0000ff]Not[/color][/size][size=2] TransferClient [/size][size=2][color=#0000ff]Is[/color][/size][size=2][color=#0000ff]Nothing[/color][/size][size=2][color=#0000ff]Then</p><p></p><p>[/color][/size][size=2]TransferClient.Close()</p><p></p><p>[/size][size=2][color=#0000ff]End[/color][/size][size=2][color=#0000ff]If</p><p></p><p>[/color][/size][size=2]Send(Commands.Quit)</p><p></p><p>_Connected = [/size][size=2][color=#0000ff]False</p><p></p><p>[/color][/size][size=2][color=#0000ff]End[/color][/size][size=2][color=#0000ff]If</p><p></p><p>[/color][/size][size=2][color=#0000ff]End[/color][/size][size=2][color=#0000ff]Sub</p><p></p><p>[/color][/size][size=2][color=#0000ff]Private[/color][/size][size=2] TransferClient [/size][size=2][color=#0000ff]As[/color][/size][size=2] System.Net.Sockets.TcpClient</p><p></p><p>[/size][size=2][color=#0000ff]Private[/color][/size][size=2] TransferEndpoint [/size][size=2][color=#0000ff]As[/color][/size][size=2] System.Net.IPEndPoint</p><p></p><p></p><p></p><p></p><p></p><p>[/size][size=2][color=#0000ff]Private[/color][/size][size=2][color=#0000ff]Sub[/color][/size][size=2] CreateTransferClient()</p><p></p><p>[/size][size=2][color=#0000ff]Dim[/color][/size][size=2] Response [/size][size=2][color=#0000ff]As[/color][/size][size=2][color=#0000ff]String[/color][/size][size=2] = Send(Commands.UsePassiveMode)</p><p></p><p>[/size][size=2][color=#0000ff]If[/color][/size][size=2][color=#0000ff]Not[/color][/size][size=2] CheckCode(Response, ReturnCodes.EnteringPassivemode) [/size][size=2][color=#0000ff]Then</p><p></p><p>[/color][/size][size=2][color=#0000ff]Throw[/color][/size][size=2][color=#0000ff]New[/color][/size][size=2] ApplicationException("Error entering passive mode")</p><p></p><p>[/size][size=2][color=#0000ff]End[/color][/size][size=2][color=#0000ff]If</p><p></p><p>[/color][/size][size=2][color=#008000]'The IP address and port number is appended to the response</p><p></p><p>[/color][/size][size=2][color=#008000]'Retrieve these details</p><p></p><p>[/color][/size][size=2][color=#0000ff]Dim[/color][/size][size=2] StartPos [/size][size=2][color=#0000ff]As[/color][/size][size=2][color=#0000ff]Integer[/color][/size][size=2] = Response.IndexOf("(")</p><p></p><p>[/size][size=2][color=#0000ff]Dim[/color][/size][size=2] EndPos [/size][size=2][color=#0000ff]As[/color][/size][size=2][color=#0000ff]Integer[/color][/size][size=2] = Response.IndexOf(")")</p><p></p><p>[/size][size=2][color=#0000ff]Dim[/color][/size][size=2] IPAndPort [/size][size=2][color=#0000ff]As[/color][/size][size=2][color=#0000ff]String[/color][/size][size=2] = Response.Substring(StartPos + 1, EndPos - StartPos - 1)</p><p></p><p>[/size][size=2][color=#0000ff]Dim[/color][/size][size=2] IPParts() [/size][size=2][color=#0000ff]As[/color][/size][size=2][color=#0000ff]String[/color][/size][size=2] = IPAndPort.Split(","c)</p><p></p><p>[/size][size=2][color=#0000ff]Dim[/color][/size][size=2] IP [/size][size=2][color=#0000ff]As[/color][/size][size=2][color=#0000ff]String[/color][/size][size=2] = IPParts(0) + "." + IPParts(1) + "." + IPParts(2) + "." + IPParts(3)</p><p></p><p>[/size][size=2][color=#0000ff]Dim[/color][/size][size=2] Port [/size][size=2][color=#0000ff]As[/color][/size][size=2][color=#0000ff]Integer[/color][/size][size=2] = Convert.ToInt32(IPParts(4)) * 256 + Convert.ToInt32(IPParts(5))</p><p></p><p>[/size][size=2][color=#008000]'Create the date transfer conection</p><p></p><p>[/color][/size][size=2]TransferClient = [/size][size=2][color=#0000ff]New[/color][/size][size=2] System.Net.Sockets.TcpClient</p><p></p><p>TransferEndpoint = [/size][size=2][color=#0000ff]New[/color][/size][size=2] System.Net.IPEndPoint([/size][size=2][color=#ff0000]IPAddress[/color][/size][size=2].Parse(IP), Port)</p><p></p><p>[/size][size=2][color=#0000ff]End[/color][/size][size=2][color=#0000ff]Sub</p><p></p><p></p><p></p><p>[/color][/size][size=2][color=#0000ff]Private[/color][/size][size=2][color=#0000ff]Sub[/color][/size][size=2] SetMode([/size][size=2][color=#0000ff]ByVal[/color][/size][size=2] binaryMode [/size][size=2][color=#0000ff]As[/color][/size][size=2][color=#0000ff]Boolean[/color][/size][size=2])</p><p></p><p>[/size][size=2][color=#0000ff]Dim[/color][/size][size=2] Response [/size][size=2][color=#0000ff]As[/color][/size][size=2][color=#0000ff]String</p><p></p><p>[/color][/size][size=2][color=#0000ff]If[/color][/size][size=2] binaryMode [/size][size=2][color=#0000ff]Then</p><p></p><p>[/color][/size][size=2]Response = Send(Commands.UseBinary)</p><p></p><p>[/size][size=2][color=#0000ff]Else</p><p></p><p>[/color][/size][size=2]Response = Send(Commands.UseAscii)</p><p></p><p>[/size][size=2][color=#0000ff]End[/color][/size][size=2][color=#0000ff]If</p><p></p><p>[/color][/size][size=2][color=#0000ff]If[/color][/size][size=2][color=#0000ff]Not[/color][/size][size=2] CheckCode(Response, ReturnCodes.Accepted) [/size][size=2][color=#0000ff]Then</p><p></p><p>[/color][/size][size=2][color=#0000ff]Throw[/color][/size][size=2] ([/size][size=2][color=#0000ff]New[/color][/size][size=2] ApplicationException("Could not change mode"))</p><p></p><p>[/size][size=2][color=#0000ff]End[/color][/size][size=2][color=#0000ff]If</p><p></p><p>[/color][/size][size=2][color=#0000ff]End[/color][/size][size=2][color=#0000ff]Sub</p><p></p><p>[/color][/size][size=2][color=#0000ff]Public[/color][/size][size=2][color=#0000ff]Function[/color][/size][size=2] DownlaodFile([/size][size=2][color=#0000ff]ByVal[/color][/size][size=2] filename [/size][size=2][color=#0000ff]As[/color][/size][size=2][color=#0000ff]String[/color][/size][size=2], [/size][size=2][color=#0000ff]ByVal[/color][/size][size=2] binaryMode [/size][size=2][color=#0000ff]As[/color][/size][size=2][color=#0000ff]Boolean[/color][/size][size=2]) [/size][size=2][color=#0000ff]As[/color][/size][size=2] NetworkStream</p><p></p><p>[/size][size=2][color=#008000]'Create a connection to the second port in passive mode</p><p></p><p>[/color][/size][size=2]CreateTransferClient()</p><p></p><p>TransferClient.Connect(TransferEndPoint)</p><p></p><p>SetMode(binaryMode)</p><p></p><p>[/size][size=2][color=#0000ff]Dim[/color][/size][size=2] Response [/size][size=2][color=#0000ff]As[/color][/size][size=2][color=#0000ff]String[/color][/size][size=2] = Send(Commands.GetFile & filename * vbNewLine)</p><p></p><p></p><p></p><p>[/size][size=2][color=#0000ff]If[/color][/size][size=2][color=#0000ff]Not[/color][/size][size=2] CheckCode(Response, ReturnCodes.StartingTransferAlreadyOpen) [/size][size=2][color=#0000ff]And[/color][/size][size=2][color=#0000ff]Not[/color][/size][size=2] (CheckCode(Response, ReturnCodes.StartingTransferOpening)) [/size][size=2][color=#0000ff]Then</p><p></p><p>[/color][/size][size=2][color=#0000ff]Throw[/color][/size][size=2][color=#0000ff]New[/color][/size][size=2] ApplicationException("Could not open connection")</p><p></p><p>[/size][size=2][color=#0000ff]End[/color][/size][size=2][color=#0000ff]If</p><p></p><p>[/color][/size][size=2][color=#008000]'Let the client read data fron the network stream</p><p></p><p>[/color][/size][size=2][color=#008000]'This is more efficient than creating and returning an</p><p></p><p>[/color][/size][size=2][color=#008000]'intermediate byte array, but it also relies on the client</p><p></p><p>[/color][/size][size=2][color=#008000]'to close the stream</p><p></p><p>[/color][/size][size=2][color=#0000ff]Return[/color][/size][size=2] TransferClient.GetStream()</p><p></p><p>[/size][size=2][color=#0000ff]End[/color][/size][size=2][color=#0000ff]Function</p><p></p><p></p><p></p><p>[/color][/size][size=2][color=#0000ff]Public[/color][/size][size=2][color=#0000ff]Sub[/color][/size][size=2] ConfirmDownLoadComplete()</p><p></p><p>[/size][size=2][color=#0000ff]Dim[/color][/size][size=2] Response [/size][size=2][color=#0000ff]As[/color][/size][size=2][color=#0000ff]String[/color][/size][size=2] = GetResponse()</p><p></p><p>CheckCode(Response, ReturnCodes.TransferComplete)</p><p></p><p>[/size][size=2][color=#0000ff]End[/color][/size][size=2][color=#0000ff]Sub</p><p></p><p>End[/color][/size][size=2][color=#0000ff]Class</p><p></p><p>[/color][/size]</p><p></p><p>[/CODE]</p></blockquote><p></p>
[QUOTE="garcon, post: 3607, member: 1398"] Folks, This is a recipe for accessing an FTP site. I having problems with the "Send" method and th "IPAddress" method - my compiler says: "[size=2]Name Send is not declared" and "[size=2]Name IPAddress is not declared"[/size][/size] [size=2][size=2][/size][/size] [size=2][size=2]Can anyone make any intelligent suggestions please?[/size][/size] [size=2][size=2][/size][/size] [size=2][size=2]**** CODE AS FOLLOWS ****[/size][/size] [size=2][size=2][/size][/size] [size=2][size=2][/size][/size] [size=2][size=2][size=2][color=#0000ff] [/color][/size][/size][/size][CODE] [size=2][color=#0000ff]Public[/color][/size][size=2][color=#0000ff]Class[/color][/size][size=2] FtpClient [/size][size=2][color=#0000ff]Inherits[/color][/size][size=2] System.ComponentModel.Component [/size][size=2][color=#008000]'The internal TCP connection [/color][/size][size=2][color=#0000ff]Private[/color][/size][size=2] Client [/size][size=2][color=#0000ff]As[/color][/size][size=2][color=#0000ff]New[/color][/size][size=2] System.Net.Sockets.TcpClient [/size][size=2][color=#0000ff]Private[/color][/size][size=2] Stream [/size][size=2][color=#0000ff]As[/color][/size][size=2] System.Net.Sockets.NetworkStream [/size][size=2][color=#008000]'The connection state [/color][/size][size=2][color=#0000ff]Private[/color][/size][size=2] _Connected [/size][size=2][color=#0000ff]As[/color][/size][size=2][color=#0000ff]Boolean[/color][/size][size=2] = [/size][size=2][color=#0000ff]False [/color][/size][size=2][color=#0000ff]Public[/color][/size][size=2][color=#0000ff]ReadOnly[/color][/size][size=2][color=#0000ff]Property[/color][/size][size=2] Connected() [/size][size=2][color=#0000ff]As[/color][/size][size=2][color=#0000ff]Boolean [/color][/size][size=2][color=#0000ff]Get [/color][/size][size=2][color=#0000ff]Return[/color][/size][size=2] _Connected [/size][size=2][color=#0000ff]End[/color][/size][size=2][color=#0000ff]Get [/color][/size][size=2][color=#0000ff]End[/color][/size][size=2][color=#0000ff]Property [/color][/size][size=2][color=#008000]'Some command constants [/color][/size][size=2][color=#0000ff]Private[/color][/size][size=2][color=#0000ff]Class[/color][/size][size=2] Commands [/size][size=2][color=#0000ff]Public[/color][/size][size=2][color=#0000ff]Const[/color][/size][size=2] User [/size][size=2][color=#0000ff]As[/color][/size][size=2][color=#0000ff]String[/color][/size][size=2] = "USER " [/size][size=2][color=#0000ff]Public[/color][/size][size=2][color=#0000ff]Const[/color][/size][size=2] Password [/size][size=2][color=#0000ff]As[/color][/size][size=2][color=#0000ff]String[/color][/size][size=2] = "PASS " [/size][size=2][color=#0000ff]Public[/color][/size][size=2][color=#0000ff]Const[/color][/size][size=2] Quit [/size][size=2][color=#0000ff]As[/color][/size][size=2][color=#0000ff]String[/color][/size][size=2] = "QUIT" & vbNewLine [/size][size=2][color=#0000ff]Public[/color][/size][size=2][color=#0000ff]Const[/color][/size][size=2] GetFile [/size][size=2][color=#0000ff]As[/color][/size][size=2][color=#0000ff]String[/color][/size][size=2] = "RETR " [/size][size=2][color=#0000ff]Public[/color][/size][size=2][color=#0000ff]Const[/color][/size][size=2] UsePassiveMode [/size][size=2][color=#0000ff]As[/color][/size][size=2][color=#0000ff]String[/color][/size][size=2] = "PASV" & vbNewLine [/size][size=2][color=#0000ff]Public[/color][/size][size=2][color=#0000ff]Const[/color][/size][size=2] UseBinary [/size][size=2][color=#0000ff]As[/color][/size][size=2][color=#0000ff]String[/color][/size][size=2] = "TYPE I" & vbNewLine [/size][size=2][color=#0000ff]Public[/color][/size][size=2][color=#0000ff]Const[/color][/size][size=2] UseAscii [/size][size=2][color=#0000ff]As[/color][/size][size=2][color=#0000ff]String[/color][/size][size=2] = "TYPE A" & vbNewLine [/size][size=2][color=#0000ff]End[/color][/size][size=2][color=#0000ff]Class [/color][/size][size=2][color=#0000ff]Private[/color][/size][size=2][color=#0000ff]Enum[/color][/size][size=2] ReturnCodes ServiceReady = 220 Accepted = 200 PasswordRequired = 331 UserLoggedIn = 230 EnteringPassivemode = 227 StartingTransferAlreadyOpen = 125 StartingTransferOpening = 150 TransferComplete = 226 [/size][size=2][color=#0000ff]End[/color][/size][size=2][color=#0000ff]Enum [/color][/size][size=2][color=#0000ff]Private[/color][/size][size=2][color=#0000ff]Function[/color][/size][size=2] GetResponse() [/size][size=2][color=#0000ff]As[/color][/size][size=2][color=#0000ff]String [/color][/size][size=2][color=#008000]'Retrieve all available lines [/color][/size][size=2][color=#0000ff]Dim[/color][/size][size=2] Character [/size][size=2][color=#0000ff]As[/color][/size][size=2][color=#0000ff]String [/color][/size][size=2][color=#0000ff]Dim[/color][/size][size=2] Response [/size][size=2][color=#0000ff]As[/color][/size][size=2][color=#0000ff]String[/color][/size][size=2] = "" [/size][size=2][color=#0000ff]Do [/color][/size][size=2][color=#0000ff]Do [/color][/size][size=2]Character = Chr(Stream.ReadByte()).ToString() Response &= Character [/size][size=2][color=#0000ff]Loop[/color][/size][size=2][color=#0000ff]Until[/color][/size][size=2] Character = Chr(10) [/size][size=2][color=#0000ff]Loop[/color][/size][size=2][color=#0000ff]While[/color][/size][size=2] Stream.DataAvailable Response = Response.Trim([/size][size=2][color=#0000ff]New[/color][/size][size=2][color=#0000ff]Char[/color][/size][size=2]() {Chr(13), Chr(10)}) System.Diagnostics.Debug.WriteLine(Response) [/size][size=2][color=#0000ff]Return[/color][/size][size=2] Response [/size][size=2][color=#0000ff]End[/color][/size][size=2][color=#0000ff]Function [/color][/size][size=2][color=#0000ff]Private[/color][/size][size=2][color=#0000ff]Function[/color][/size][size=2] CheckCode([/size][size=2][color=#0000ff]ByVal[/color][/size][size=2] response [/size][size=2][color=#0000ff]As[/color][/size][size=2][color=#0000ff]String[/color][/size][size=2], [/size][size=2][color=#0000ff]ByVal[/color][/size][size=2] expectedCode [/size][size=2][color=#0000ff]As[/color][/size][size=2] ReturnCodes) [/size][size=2][color=#0000ff]As[/color][/size][size=2][color=#0000ff]Boolean [/color][/size][size=2][color=#0000ff]Return[/color][/size][size=2] Val(response.Substring(0, 3)) = expectedCode [/size][size=2][color=#0000ff]End[/color][/size][size=2][color=#0000ff]Function [/color][/size][size=2][color=#0000ff]Public[/color][/size][size=2][color=#0000ff]Sub[/color][/size][size=2] Connect([/size][size=2][color=#0000ff]ByVal[/color][/size][size=2] serverName [/size][size=2][color=#0000ff]As[/color][/size][size=2][color=#0000ff]String[/color][/size][size=2], [/size][size=2][color=#0000ff]ByVal[/color][/size][size=2] userName [/size][size=2][color=#0000ff]As[/color][/size][size=2][color=#0000ff]String[/color][/size][size=2], [/size][size=2][color=#0000ff]ByVal[/color][/size][size=2] password [/size][size=2][color=#0000ff]As[/color][/size][size=2][color=#0000ff]String[/color][/size][size=2]) [/size][size=2][color=#0000ff]If[/color][/size][size=2] Connected [/size][size=2][color=#0000ff]Then[/color][/size][size=2][color=#0000ff]Me[/color][/size][size=2].Disconnect() [/size][size=2][color=#008000]'Connect to POP3 server [/color][/size][size=2][color=#008000]'which is always at port 21) [/color][/size][size=2]Client.Connect(serverName, 21) Stream = Client.GetStream() [/size][size=2][color=#008000]'Send user name [/color][/size][size=2][color=#0000ff]Dim[/color][/size][size=2] Response [/size][size=2][color=#0000ff]As[/color][/size][size=2][color=#0000ff]String [/color][/size][size=2]Response = GetResponse() Response = Send(Commands.User & userName & vbNewLine) [/size][size=2][color=#0000ff]If[/color][/size][size=2] CheckCode(Response, ReturnCodes.PasswordRequired) [/size][size=2][color=#0000ff]Then [/color][/size][size=2][color=#008000]'Send password [/color][/size][size=2]Response = Send(Commands.Password & password & vbNewLine) [/size][size=2][color=#0000ff]End[/color][/size][size=2][color=#0000ff]If [/color][/size][size=2][color=#0000ff]If[/color][/size][size=2][color=#0000ff]Not[/color][/size][size=2] (CheckCode(Response, ReturnCodes.UserLoggedIn)) [/size][size=2][color=#0000ff]And[/color][/size][size=2][color=#0000ff]Not[/color][/size][size=2] (CheckCode(Response, ReturnCodes.ServiceReady)) [/size][size=2][color=#0000ff]Then [/color][/size][size=2][color=#0000ff]Throw[/color][/size][size=2][color=#0000ff]New[/color][/size][size=2] ApplicationException("Could not log in") [/size][size=2][color=#0000ff]End[/color][/size][size=2][color=#0000ff]If [/color][/size][size=2]_Connected = [/size][size=2][color=#0000ff]True [/color][/size][size=2][color=#0000ff]End[/color][/size][size=2][color=#0000ff]Sub [/color][/size][size=2][color=#0000ff]Public[/color][/size][size=2][color=#0000ff]Sub[/color][/size][size=2] Disconnect() [/size][size=2][color=#0000ff]If[/color][/size][size=2] Connected [/size][size=2][color=#0000ff]Then [/color][/size][size=2][color=#0000ff]If[/color][/size][size=2][color=#0000ff]Not[/color][/size][size=2] TransferClient [/size][size=2][color=#0000ff]Is[/color][/size][size=2][color=#0000ff]Nothing[/color][/size][size=2][color=#0000ff]Then [/color][/size][size=2]TransferClient.Close() [/size][size=2][color=#0000ff]End[/color][/size][size=2][color=#0000ff]If [/color][/size][size=2]Send(Commands.Quit) _Connected = [/size][size=2][color=#0000ff]False [/color][/size][size=2][color=#0000ff]End[/color][/size][size=2][color=#0000ff]If [/color][/size][size=2][color=#0000ff]End[/color][/size][size=2][color=#0000ff]Sub [/color][/size][size=2][color=#0000ff]Private[/color][/size][size=2] TransferClient [/size][size=2][color=#0000ff]As[/color][/size][size=2] System.Net.Sockets.TcpClient [/size][size=2][color=#0000ff]Private[/color][/size][size=2] TransferEndpoint [/size][size=2][color=#0000ff]As[/color][/size][size=2] System.Net.IPEndPoint [/size][size=2][color=#0000ff]Private[/color][/size][size=2][color=#0000ff]Sub[/color][/size][size=2] CreateTransferClient() [/size][size=2][color=#0000ff]Dim[/color][/size][size=2] Response [/size][size=2][color=#0000ff]As[/color][/size][size=2][color=#0000ff]String[/color][/size][size=2] = Send(Commands.UsePassiveMode) [/size][size=2][color=#0000ff]If[/color][/size][size=2][color=#0000ff]Not[/color][/size][size=2] CheckCode(Response, ReturnCodes.EnteringPassivemode) [/size][size=2][color=#0000ff]Then [/color][/size][size=2][color=#0000ff]Throw[/color][/size][size=2][color=#0000ff]New[/color][/size][size=2] ApplicationException("Error entering passive mode") [/size][size=2][color=#0000ff]End[/color][/size][size=2][color=#0000ff]If [/color][/size][size=2][color=#008000]'The IP address and port number is appended to the response [/color][/size][size=2][color=#008000]'Retrieve these details [/color][/size][size=2][color=#0000ff]Dim[/color][/size][size=2] StartPos [/size][size=2][color=#0000ff]As[/color][/size][size=2][color=#0000ff]Integer[/color][/size][size=2] = Response.IndexOf("(") [/size][size=2][color=#0000ff]Dim[/color][/size][size=2] EndPos [/size][size=2][color=#0000ff]As[/color][/size][size=2][color=#0000ff]Integer[/color][/size][size=2] = Response.IndexOf(")") [/size][size=2][color=#0000ff]Dim[/color][/size][size=2] IPAndPort [/size][size=2][color=#0000ff]As[/color][/size][size=2][color=#0000ff]String[/color][/size][size=2] = Response.Substring(StartPos + 1, EndPos - StartPos - 1) [/size][size=2][color=#0000ff]Dim[/color][/size][size=2] IPParts() [/size][size=2][color=#0000ff]As[/color][/size][size=2][color=#0000ff]String[/color][/size][size=2] = IPAndPort.Split(","c) [/size][size=2][color=#0000ff]Dim[/color][/size][size=2] IP [/size][size=2][color=#0000ff]As[/color][/size][size=2][color=#0000ff]String[/color][/size][size=2] = IPParts(0) + "." + IPParts(1) + "." + IPParts(2) + "." + IPParts(3) [/size][size=2][color=#0000ff]Dim[/color][/size][size=2] Port [/size][size=2][color=#0000ff]As[/color][/size][size=2][color=#0000ff]Integer[/color][/size][size=2] = Convert.ToInt32(IPParts(4)) * 256 + Convert.ToInt32(IPParts(5)) [/size][size=2][color=#008000]'Create the date transfer conection [/color][/size][size=2]TransferClient = [/size][size=2][color=#0000ff]New[/color][/size][size=2] System.Net.Sockets.TcpClient TransferEndpoint = [/size][size=2][color=#0000ff]New[/color][/size][size=2] System.Net.IPEndPoint([/size][size=2][color=#ff0000]IPAddress[/color][/size][size=2].Parse(IP), Port) [/size][size=2][color=#0000ff]End[/color][/size][size=2][color=#0000ff]Sub [/color][/size][size=2][color=#0000ff]Private[/color][/size][size=2][color=#0000ff]Sub[/color][/size][size=2] SetMode([/size][size=2][color=#0000ff]ByVal[/color][/size][size=2] binaryMode [/size][size=2][color=#0000ff]As[/color][/size][size=2][color=#0000ff]Boolean[/color][/size][size=2]) [/size][size=2][color=#0000ff]Dim[/color][/size][size=2] Response [/size][size=2][color=#0000ff]As[/color][/size][size=2][color=#0000ff]String [/color][/size][size=2][color=#0000ff]If[/color][/size][size=2] binaryMode [/size][size=2][color=#0000ff]Then [/color][/size][size=2]Response = Send(Commands.UseBinary) [/size][size=2][color=#0000ff]Else [/color][/size][size=2]Response = Send(Commands.UseAscii) [/size][size=2][color=#0000ff]End[/color][/size][size=2][color=#0000ff]If [/color][/size][size=2][color=#0000ff]If[/color][/size][size=2][color=#0000ff]Not[/color][/size][size=2] CheckCode(Response, ReturnCodes.Accepted) [/size][size=2][color=#0000ff]Then [/color][/size][size=2][color=#0000ff]Throw[/color][/size][size=2] ([/size][size=2][color=#0000ff]New[/color][/size][size=2] ApplicationException("Could not change mode")) [/size][size=2][color=#0000ff]End[/color][/size][size=2][color=#0000ff]If [/color][/size][size=2][color=#0000ff]End[/color][/size][size=2][color=#0000ff]Sub [/color][/size][size=2][color=#0000ff]Public[/color][/size][size=2][color=#0000ff]Function[/color][/size][size=2] DownlaodFile([/size][size=2][color=#0000ff]ByVal[/color][/size][size=2] filename [/size][size=2][color=#0000ff]As[/color][/size][size=2][color=#0000ff]String[/color][/size][size=2], [/size][size=2][color=#0000ff]ByVal[/color][/size][size=2] binaryMode [/size][size=2][color=#0000ff]As[/color][/size][size=2][color=#0000ff]Boolean[/color][/size][size=2]) [/size][size=2][color=#0000ff]As[/color][/size][size=2] NetworkStream [/size][size=2][color=#008000]'Create a connection to the second port in passive mode [/color][/size][size=2]CreateTransferClient() TransferClient.Connect(TransferEndPoint) SetMode(binaryMode) [/size][size=2][color=#0000ff]Dim[/color][/size][size=2] Response [/size][size=2][color=#0000ff]As[/color][/size][size=2][color=#0000ff]String[/color][/size][size=2] = Send(Commands.GetFile & filename * vbNewLine) [/size][size=2][color=#0000ff]If[/color][/size][size=2][color=#0000ff]Not[/color][/size][size=2] CheckCode(Response, ReturnCodes.StartingTransferAlreadyOpen) [/size][size=2][color=#0000ff]And[/color][/size][size=2][color=#0000ff]Not[/color][/size][size=2] (CheckCode(Response, ReturnCodes.StartingTransferOpening)) [/size][size=2][color=#0000ff]Then [/color][/size][size=2][color=#0000ff]Throw[/color][/size][size=2][color=#0000ff]New[/color][/size][size=2] ApplicationException("Could not open connection") [/size][size=2][color=#0000ff]End[/color][/size][size=2][color=#0000ff]If [/color][/size][size=2][color=#008000]'Let the client read data fron the network stream [/color][/size][size=2][color=#008000]'This is more efficient than creating and returning an [/color][/size][size=2][color=#008000]'intermediate byte array, but it also relies on the client [/color][/size][size=2][color=#008000]'to close the stream [/color][/size][size=2][color=#0000ff]Return[/color][/size][size=2] TransferClient.GetStream() [/size][size=2][color=#0000ff]End[/color][/size][size=2][color=#0000ff]Function [/color][/size][size=2][color=#0000ff]Public[/color][/size][size=2][color=#0000ff]Sub[/color][/size][size=2] ConfirmDownLoadComplete() [/size][size=2][color=#0000ff]Dim[/color][/size][size=2] Response [/size][size=2][color=#0000ff]As[/color][/size][size=2][color=#0000ff]String[/color][/size][size=2] = GetResponse() CheckCode(Response, ReturnCodes.TransferComplete) [/size][size=2][color=#0000ff]End[/color][/size][size=2][color=#0000ff]Sub End[/color][/size][size=2][color=#0000ff]Class [/color][/size] [/CODE] [/QUOTE]
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