Node.js

HttpPostJson2Async Example

Demonstrates use of the HttpPostJson2Async method. Node.js

NODEJS_PRELUDE

function chilkatExample() {

    var success = false;

    // 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.

    var http = new chilkat.Http();

    // 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.AcceptCharset = "";
    http.UserAgent = "";
    http.AcceptLanguage = "";
    http.AllowGzip = false;

    var jsonBody = "{\"client_id\": \"PLAID_CLIENT_ID\", \"secret\":\"PLAID_SECRET\", \"count\": 10, \"offset\": 0}";
    // task: Task
    var task = http.PostJson2Async("https://sandbox.plaid.com/institutions/get","application/json",jsonBody);
    if (http.LastMethodSuccess == false) {
        console.log(http.LastErrorText);
        return;
    }

    // Start the background task.
    success = task.Run();
    if (!success) {
        console.log(task.LastErrorText);

        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.  
    while (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) {
        console.log("Task did not complete.");
        console.log("task status: " + task.Status);

        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) {
        console.log("The underlying task failed, and there is no HTTP response object.");
        console.log("The LastErrorText for the underlying method call is:");
        console.log(task.ResultErrorText);

        return;
    }

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

    var statusCode = resp.StatusCode;
    console.log("Response status code = " + statusCode);

    // Examine the JSON response..
    var json = new chilkat.JsonObject();
    json.Load(resp.BodyStr);
    json.EmitCompact = false;
    console.log("JSON Response Body:");
    console.log(json.Emit());

}

chilkatExample();