(Go) HttpPostJson2Async Example

Demonstrates use of the HttpPostJson2Async method.

Chilkat Go Downloads Go Package for Windows, MacOS, Linux, Alpine Linux, Solaris

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

    // See PostJson2 Example for the synchronous equivalent of this example.

    http := chilkat.NewHttp()

    var success bool

    // Sends a POST equivalent to the following CURL command:

    // curl -X POST https://sandbox.plaid.com/institutions/get \
    //   -H 'content-type: application/json' \
    //   -d '{
    //     "client_id": String,
    //     "secret":String,
    //     "count": Number,
    //     "offset": Number
    //   }'

    // Suppress some default headers that would automatically added..
    http.SetAcceptCharset("")
    http.SetUserAgent("")
    http.SetAcceptLanguage("")
    http.SetAllowGzip(false)

    jsonBody := "{\"client_id\": \"PLAID_CLIENT_ID\", \"secret\":\"PLAID_SECRET\", \"count\": 10, \"offset\": 0}"
    c := make(chan *chilkat.Task)
    go http.PostJson2Async("https://sandbox.plaid.com/institutions/get","application/json",jsonBody,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
    // while the HTTP POST is in progress

    // For this example, we'll simply sleep and periodically
    // check to see if the HTTP POST is finished.  
    for task.Finished() != true {
        // Sleep 100 ms.
        task.SleepMs(100)
    }

    // When we get here, the task is either finished successfully or not, or was canceled/aborted.

    // 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 getting the result of the underlying method call.
    // A task status of 7 indicates completion.
    if task.StatusInt() != 7 {
        fmt.Println("Task did not complete.")
        fmt.Println("task status: ", task.Status())
        task.DisposeTask()
        http.DisposeHttp()
        task.DisposeTask()
        return
    }

    // When called synchronously, the PostJson2 method returns an HTTP response object,
    // unless the method failed and there was no response to be had.
    // Check to see if PostJson2 method failed (and thus there is no response object).
    if task.TaskSuccess() == false {
        fmt.Println("The underlying task failed, and there is no HTTP response object.")
        fmt.Println("The LastErrorText for the underlying method call is:")
        fmt.Println(task.ResultErrorText())
        task.DisposeTask()
        http.DisposeHttp()
        task.DisposeTask()
        return
    }

    // To get the HTTP response object, create a new instance and load it with the result from the task.
    resp := chilkat.NewHttpResponse()
    resp.LoadTaskResult(task)
    task.DisposeTask()

    statusCode := resp.StatusCode()
    fmt.Println("Response status code = ", statusCode)

    // Examine the JSON response..
    json := chilkat.NewJsonObject()
    json.Load(resp.BodyStr())
    json.SetEmitCompact(false)
    fmt.Println("JSON Response Body:")
    fmt.Println(*json.Emit())

    http.DisposeHttp()
    task.DisposeTask()
    resp.DisposeHttpResponse()
    json.DisposeJsonObject()