Unicode C++

Get the LastErrorText for an Asynchronous Method Call

See more Async Examples

Demonstrates how to get the LastErrorText information for a Chilkat method called asynchronously. Unicode C++

#include <CkSocketW.h>
#include <CkTaskW.h>

void ChilkatSample(void)
    {
    bool success = false;

    // This example requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    CkSocketW socket;

    // The Async call simply creates the task.  The "Connect" method has not yet been called.
    int maxWaitMs = 5000;
    // Let's intentionally cause this connect to fail by giving it an invalid domain..
    CkTaskW *task = socket.ConnectAsync(L"amazonbladflakjsdflksadjf.com",443,true,maxWaitMs);
    if (socket.get_LastMethodSuccess() == false) {
        wprintf(L"%s\n",socket.lastErrorText());
        return;
    }

    // Start the background thread to run the task.
    success = task->Run();
    if (!success) {
        wprintf(L"%s\n",task->lastErrorText());
        delete task;
        return;
    }

    // The application is now free to do anything else

    // For this example, we'll simply sleep and periodically
    // check to see if the Socket Connect if finished.
    while (task->get_Finished() != true) {
        // Sleep 1 ms.
        task->SleepMs(1);
    }

    // If the task completed, it means the method (in this case the Connect method) was called and returned success or failure.
    if (task->get_StatusInt() != 7) {
        wprintf(L"Task did not complete.\n");
        wprintf(L"task status: %s\n",task->status());
        delete task;
        return;
    }

    // Get the success/failure of the Connect
    // (This is the return value of the Connect method had it been called synchronously)
    success = task->GetResultBool();
    if (success == false) {
        // Get the LastErrorText for the Connect method call.
        // Had we called Connect synchronously, we would've simply accessed the socket object's LastErrorText property.
        // Instead, we get the task object's ResultErrorText.
        wprintf(L"%s\n",task->resultErrorText());
    }
    else {
        wprintf(L"Connect succeeded.\n");
    }

    delete task;
    }