Xbase++

Async Accept Socket Connection

See more Socket/SSL/TLS Examples

Demonstrates how to get the connected client socket after accepting a connection asynchronously. Xbase++

LOCAL nSuccess
LOCAL oListenSocket
LOCAL nMaxWaitMs
LOCAL oAcceptTask
LOCAL oConnectedClient

nSuccess := 0

//  This example assumes the Chilkat Socket API to have been previously unlocked.
//  See Socket Unlock Sample for sample code.

oListenSocket := CreateObject("Chilkat.Socket")

//  Bind to a port and listen.
//  This example will listen at port 5555 and allows for a backlog
//  of 25 pending connection requests.
nSuccess := oListenSocket:BindAndListen(5555, 25)
IF (nSuccess != 1)
    ? oListenSocket:LastErrorText
    oListenSocket:destroy()
    RETURN
ENDIF

//  Start a background task to accept an incoming connection ...
nMaxWaitMs := 20000
oAcceptTask := oListenSocket:AcceptNextConnectionAsync(nMaxWaitMs)
oAcceptTask:Run()

//  ...
//  ...
//  ...

//  Imagine at this point the task has completed successfully,
//  and a connection was accepted.  Here's how to get the connected socket...
oConnectedClient := CreateObject("Chilkat.Socket")
nSuccess := oConnectedClient:LoadTaskResult(oAcceptTask)

//  Here's how it works:  The AcceptNextConnection method would normally
//  return a socket object when called synchronously.  When called asynchronously,
//  it cannot do so because it returns the task object.  When the async method
//  (running in a background thread) completes, the socket object that is the client
//  connection is contained within the task object.
//  
//  This can be generalized for any case where a Chilkat method returns an object.
//  The async version of that method is such that the object returned in the background
//  thread is contained within the task object.

//  To get the result object, we create a new object instance of that type.
//  In this case, we create a socket object (connectedClient).  There is a LoadTaskResult
//  method in all Chilkat classes that can be a return value of an async method call.
//  The LoadTaskResult method transfers the returned object from the task to the caller.

oListenSocket:destroy()
oConnectedClient:destroy()