(Unicode C) HttpPostJson2Async Example

Demonstrates use of the HttpPostJson2Async method.

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#include <C_CkHttpW.h>
#include <C_CkTaskW.h>
#include <C_CkHttpResponseW.h>
#include <C_CkJsonObjectW.h>

void ChilkatSample(void)
    {
    HCkHttpW http;
    BOOL success;
    const wchar_t *jsonBody;
    HCkTaskW task;
    HCkHttpResponseW resp;
    int statusCode;
    HCkJsonObjectW json;

    //  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 = CkHttpW_Create();

    //  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..
    CkHttpW_putAcceptCharset(http,L"");
    CkHttpW_putUserAgent(http,L"");
    CkHttpW_putAcceptLanguage(http,L"");
    CkHttpW_putAllowGzip(http,FALSE);

    jsonBody = L"{\"client_id\": \"PLAID_CLIENT_ID\", \"secret\":\"PLAID_SECRET\", \"count\": 10, \"offset\": 0}";
    task = CkHttpW_PostJson2Async(http,L"https://sandbox.plaid.com/institutions/get",L"application/json",jsonBody);
    if (CkHttpW_getLastMethodSuccess(http) == FALSE) {
        wprintf(L"%s\n",CkHttpW_lastErrorText(http));
        CkHttpW_Dispose(http);
        return;
    }

    //  Start the background task.
    success = CkTaskW_Run(task);
    if (!success) {
        wprintf(L"%s\n",CkTaskW_lastErrorText(task));
        CkTaskW_Dispose(task);
        CkHttpW_Dispose(http);
        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 (CkTaskW_getFinished(task) != TRUE) {
        //  Sleep 100 ms.
        CkTaskW_SleepMs(task,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 (CkTaskW_getStatusInt(task) != 7) {
        wprintf(L"Task did not complete.\n");
        wprintf(L"task status: %s\n",CkTaskW_status(task));
        CkTaskW_Dispose(task);
        CkHttpW_Dispose(http);
        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 (CkTaskW_getTaskSuccess(task) == 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",CkTaskW_resultErrorText(task));
        CkTaskW_Dispose(task);
        CkHttpW_Dispose(http);
        return;
    }

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

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

    //  Examine the JSON response..
    json = CkJsonObjectW_Create();
    CkJsonObjectW_Load(json,CkHttpResponseW_bodyStr(resp));
    CkJsonObjectW_putEmitCompact(json,FALSE);
    wprintf(L"JSON Response Body:\n");
    wprintf(L"%s\n",CkJsonObjectW_emit(json));


    CkHttpW_Dispose(http);
    CkHttpResponseW_Dispose(resp);
    CkJsonObjectW_Dispose(json);

    }