(MFC) HttpPostJson2Async Example

Demonstrates use of the HttpPostJson2Async method.

Chilkat C/C++ Library Downloads MS Visual C/C++ Libs

See Also: Using MFC CString in Chilkat

#include <CkHttp.h>
#include <CkTask.h>
#include <CkHttpResponse.h>
#include <CkJsonObject.h>

void ChilkatSample(void)
    {
    CkString strOut;

    //  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;

    bool success;

    //  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);

    const char *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) {
        strOut.append(http.lastErrorText());
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    //  Start the background task.
    success = task->Run();
    if (!success) {
        strOut.append(task->lastErrorText());
        strOut.append("\r\n");
        delete task;
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        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) {
        strOut.append("Task did not complete.");
        strOut.append("\r\n");
        strOut.append("task status: ");
        strOut.append(task->status());
        strOut.append("\r\n");
        delete task;
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        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) {
        strOut.append("The underlying task failed, and there is no HTTP response object.");
        strOut.append("\r\n");
        strOut.append("The LastErrorText for the underlying method call is:");
        strOut.append("\r\n");
        strOut.append(task->resultErrorText());
        strOut.append("\r\n");
        delete task;
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

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

    int statusCode = resp.get_StatusCode();
    strOut.append("Response status code = ");
    strOut.appendInt(statusCode);
    strOut.append("\r\n");

    //  Examine the JSON response..
    CkJsonObject json;
    json.Load(resp.bodyStr());
    json.put_EmitCompact(false);
    strOut.append("JSON Response Body:");
    strOut.append("\r\n");
    strOut.append(json.emit());
    strOut.append("\r\n");


    SetDlgItemText(IDC_EDIT1,strOut.getUnicode());

    }