C

HttpPostJson2Async Example

Demonstrates use of the HttpPostJson2Async method. C

#include <C_CkHttp.h>
#include <C_CkTask.h>
#include <C_CkHttpResponse.h>
#include <C_CkJsonObject.h>

void ChilkatSample(void)
    {
    BOOL success;
    HCkHttp http;
    const char *jsonBody;
    HCkTask task;
    HCkHttpResponse resp;
    int statusCode;
    HCkJsonObject json;

    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.

    http = CkHttp_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..
    CkHttp_putAcceptCharset(http,"");
    CkHttp_putUserAgent(http,"");
    CkHttp_putAcceptLanguage(http,"");
    CkHttp_putAllowGzip(http,FALSE);

    jsonBody = "{\"client_id\": \"PLAID_CLIENT_ID\", \"secret\":\"PLAID_SECRET\", \"count\": 10, \"offset\": 0}";
    task = CkHttp_PostJson2Async(http,"https://sandbox.plaid.com/institutions/get","application/json",jsonBody);
    if (CkHttp_getLastMethodSuccess(http) == FALSE) {
        printf("%s\n",CkHttp_lastErrorText(http));
        CkHttp_Dispose(http);
        return;
    }

    // Start the background task.
    success = CkTask_Run(task);
    if (!success) {
        printf("%s\n",CkTask_lastErrorText(task));
        CkTask_Dispose(task);
        CkHttp_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 (CkTask_getFinished(task) != TRUE) {
        // Sleep 100 ms.
        CkTask_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 (CkTask_getStatusInt(task) != 7) {
        printf("Task did not complete.\n");
        printf("task status: %s\n",CkTask_status(task));
        CkTask_Dispose(task);
        CkHttp_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 (CkTask_getTaskSuccess(task) == FALSE) {
        printf("The underlying task failed, and there is no HTTP response object.\n");
        printf("The LastErrorText for the underlying method call is:\n");
        printf("%s\n",CkTask_resultErrorText(task));
        CkTask_Dispose(task);
        CkHttp_Dispose(http);
        return;
    }

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

    statusCode = CkHttpResponse_getStatusCode(resp);
    printf("Response status code = %d\n",statusCode);

    // Examine the JSON response..
    json = CkJsonObject_Create();
    CkJsonObject_Load(json,CkHttpResponse_bodyStr(resp));
    CkJsonObject_putEmitCompact(json,FALSE);
    printf("JSON Response Body:\n");
    printf("%s\n",CkJsonObject_emit(json));


    CkHttp_Dispose(http);
    CkHttpResponse_Dispose(resp);
    CkJsonObject_Dispose(json);

    }