Lianja

Async Methods Returning an String

See more Async Examples

Demonstrates how to call an asynchronous method that returns a string. This example sends an HTTPS GET request to a URL and gets the HTML response. Lianja

llSuccess = .F.

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

loHttp = createobject("CkHttp")

loTask = loHttp.QuickGetStrAsync("https://www.chilkatsoft.com/helloWorld.html")
if (loHttp.LastMethodSuccess = .F.) then
    ? loHttp.LastErrorText
    release loHttp
    return
endif

// Start the background task.
llSuccess = loTask.Run()
if (not llSuccess) then
    ? loTask.LastErrorText
    release loTask
    release loHttp
    return
endif

// The application is now free to do anything else

// For this example, we'll simply sleep and periodically
// check to see if the HTTPS GET if finished.
do while loTask.Finished <> .T.
    // Sleep 100 ms.
    loTask.SleepMs(100)
enddo

// A finished task could be one that was canceled, aborted, or truly finished.  

// If the task was "canceled", it was canceled prior to actually starting.  This could
// happen if the task was canceled while waiting in a thread pool queue to be scheduled by Chilkat's
// background thread pool scheduler.  

// If the task was "aborted", it indicates that it was canceled while running in a background thread.  
// The ResultErrorText will likely indicate that the task was aborted.

// If the task "completed", then it ran to completion, but the actual success/failure of the method
// is determined by the result obtained via a GetResult* method.  (A "completed" task will
// have a StatusInt equal to 7.   If the task finished, but was not completed, then it must've
// been aborted or canceled:
if (loTask.StatusInt <> 7) then
    ? "Task did not complete."
    ? "task status: " + loTask.Status
    release loTask
    release loHttp
    return
endif

// The QuickGetStr method returns a string.  Therefore, after the task is finished,
// we can get the string result by calling GetResultString.  This is the return value had
// we called QuickGetStr synchronously.
lcHtml = loTask.GetResultString()

? lcHtml

release loTask


release loHttp