Java

HttpPostJson2Async Example

Demonstrates use of the HttpPostJson2Async method. Java

import com.chilkatsoft.*;

public class ChilkatExample {

  static {
    try {
        System.loadLibrary("chilkat");
    } catch (UnsatisfiedLinkError e) {
      System.err.println("Native code library failed to load.\n" + e);
      System.exit(1);
    }
  }

  public static void main(String argv[])
  {
    boolean 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.

    CkHttp http = new CkHttp();

    // 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.put_AcceptCharset("");
    http.put_UserAgent("");
    http.put_AcceptLanguage("");
    http.put_AllowGzip(false);

    String jsonBody = "{\"client_id\": \"PLAID_CLIENT_ID\", \"secret\":\"PLAID_SECRET\", \"count\": 10, \"offset\": 0}";
    CkTask task = http.PostJson2Async("https://sandbox.plaid.com/institutions/get","application/json",jsonBody);
    if (http.get_LastMethodSuccess() == false) {
        System.out.println(http.lastErrorText());
        return;
        }

    // Start the background task.
    success = task.Run();
    if (!success) {
        System.out.println(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.get_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.get_StatusInt() != 7) {
        System.out.println("Task did not complete.");
        System.out.println("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.get_TaskSuccess() == false) {
        System.out.println("The underlying task failed, and there is no HTTP response object.");
        System.out.println("The LastErrorText for the underlying method call is:");
        System.out.println(task.resultErrorText());

        return;
        }

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

    int statusCode = resp.get_StatusCode();
    System.out.println("Response status code = " + statusCode);

    // Examine the JSON response..
    CkJsonObject json = new CkJsonObject();
    json.Load(resp.bodyStr());
    json.put_EmitCompact(false);
    System.out.println("JSON Response Body:");
    System.out.println(json.emit());
  }
}