Go

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. Go

    success := false

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

    http := chilkat.NewHttp()

    c := make(chan *chilkat.Task)
    go http.QuickGetStrAsync("https://www.chilkatsoft.com/helloWorld.html",c)
    task := <-c
    if http.LastMethodSuccess() == false {
        fmt.Println(http.LastErrorText())
        http.DisposeHttp()
        task.DisposeTask()
        return
    }

    // Start the background task.

    if !success {
        fmt.Println(task.LastErrorText())
        task.DisposeTask()
        http.DisposeHttp()
        task.DisposeTask()
        return
    }

    // 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.
    for task.Finished() != true {
        // Sleep 100 ms.
        task.SleepMs(100)
    }

    // 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 task.StatusInt() != 7 {
        fmt.Println("Task did not complete.")
        fmt.Println("task status: ", task.Status())
        task.DisposeTask()
        http.DisposeHttp()
        task.DisposeTask()
        return
    }

    // 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.
    html := task.GetResultString()

    fmt.Println(*html)

    task.DisposeTask()

    http.DisposeHttp()
    task.DisposeTask()