Socket (gb.net)

This class implements a socket client to allow your programs to connect with socket servers. TCP and Local (Unix sockets) connections are implemented.

This class inherits Stream in gb.
This class is .

Properties	Methods	Events
Returns or sets if the stream is blocking. Blocking Returns or sets the byte order used to read or write binary data to the stream. ByteOrder This property signals whether the last use of LINE INPUT reached the end of file, instead of reading a full line with an end-of-line character. EndOfFile Returns or sets the newline separator used by this stream. EndOfLine Return if a stream reached its end. Eof Returns the system file descriptor associated with this Stream. Handle The host to which you would like to connect. Host Return if a stream is associated with a terminal. IsTerm Returns a virtual object that allows you to enumerate a stream line by line. Lines Once a TCP connection is established, this property reflects local IP used by this connection. LocalHost Once a TCP connection is established, this property reflects local port (1-65535) used by this connection. LocalPort NullTerminatedString Return or set the path of the local socket you want to connect. Path The port to which you would like to connect on the remote host. Port Once a TCP connection is established, this property reflects remote IP used by this connection. RemoteHost Once a TCP connection is established, this property reflects remote port (1-65535) used by this connection. RemotePort If that socket has been created by the Accept method of a ServerSocket, then return that ServerSocket object. Server Reflects the current status of a Socket object. Status Returns or sets the tag associated with the stream. Tag Return a virtual object that allows to manage the terminal associated with the stream. Term Return or set the timeout of the socket, in milliseconds. Timeout	Start to buffer data written to the stream, so that everything will be sent when the Send method is called. Begin Closes the stream. Close Use this method to establish a TCP or Local (Unix) connection with a remote TCP or Local server. Connect Drop the data that has been buffered since the last call to the Begin method. Drop This function allows you to receive data from Socket. Peek Read a line of text from the stream, like the LINE INPUT instruction. ReadLine Send all the data, in one shot, since the last call to Begin. Send Start or stop watching the stream file descriptor for reading or writing, after it has been opened. Watch	This event raises after the remote side of the socket has closed the connection. Closed This event raises when some failed (for instance remote host refused connection). Error When connecting using TCP sockets, first step is to translate host name to host IP. The object will raise this event when this part of the connection process has been finished Found This event raises when data arrives to the socket from the other side of connection. Read This event raises after a connection has been established successfully. Ready This event is raised when the internal socket send buffers can take in more data. Write

This class performs its work asynchronously, so the program will not be stopped while connecting, sending or receiving data.

This class is derived from the class Stream, so you can use standard Stream & Input/Output functions to send and receive data, and to close the socket.

Sockets can be used if the library "gb.net" is included in the project. To include this library use the menu [Project] [Properties] [Components] and tick the component "gb.net".

Example

' Gambas class file

Public MySock As Socket

Public Sub Button1_Click()

  Dim sBuf As String

  MySock = New Socket
  MySock.Connect("localhost", 7000)

  Do While (MySock.Status <> Net.Connected) And (MySock.Status > 0)
    Wait 0.1
  Loop

  If MySock.Status <> Net.connected Then
    Print "Error"
    Quit
  End If

  sBuf = "Hello over there.\n"
  Write #MySock, sBuf, Len(sBuf)

  Do While Lof(MySock) = 0
    Wait 0.1
  Loop
  Read #MySock, sBuf, Lof(MySock)
  Print sBuf

  Close #MySock

End

Remarks on that example:

Even though polling is shown here, you should really use callbacks to react on different states.
See Network Programming, the tutorial about the usage of networking. There are comments to each line of this example.
There is another example in the distribution under Networking: ClientSocket.