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. C++

#include <CkSocket.h>
#include <CkTask.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.

    CkSocket 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..
    CkTask *task = socket.ConnectAsync("amazonbladflakjsdflksadjf.com",443,true,maxWaitMs);
    if (socket.get_LastMethodSuccess() == false) {
        std::cout << socket.lastErrorText() << "\r\n";
        return;
    }

    // Start the background thread to run the task.
    success = task->Run();
    if (!success) {
        std::cout << task->lastErrorText() << "\r\n";
        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) {
        std::cout << "Task did not complete." << "\r\n";
        std::cout << "task status: " << task->status() << "\r\n";
        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.
        std::cout << task->resultErrorText() << "\r\n";
    }
    else {
        std::cout << "Connect succeeded." << "\r\n";
    }

    delete task;
    }