Unicode C++

HttpPostJson2Async Example

Demonstrates use of the HttpPostJson2Async method. Unicode C++

#include <CkHttpW.h>
#include <CkTaskW.h>
#include <CkHttpResponseW.h>
#include <CkJsonObjectW.h>

void ChilkatSample(void)
    {
    bool 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.

    CkHttpW 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.put_AcceptCharset(L"");
    http.put_UserAgent(L"");
    http.put_AcceptLanguage(L"");
    http.put_AllowGzip(false);

    const wchar_t *jsonBody = L"{\"client_id\": \"PLAID_CLIENT_ID\", \"secret\":\"PLAID_SECRET\", \"count\": 10, \"offset\": 0}";
    CkTaskW *task = http.PostJson2Async(L"https://sandbox.plaid.com/institutions/get",L"application/json",jsonBody);
    if (http.get_LastMethodSuccess() == false) {
        wprintf(L"%s\n",http.lastErrorText());
        return;
    }

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

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

    int statusCode = resp.get_StatusCode();
    wprintf(L"Response status code = %d\n",statusCode);

    // Examine the JSON response..
    CkJsonObjectW json;
    json.Load(resp.bodyStr());
    json.put_EmitCompact(false);
    wprintf(L"JSON Response Body:\n");
    wprintf(L"%s\n",json.emit());
    }