Unicode C++

Asynchronous FTP Upload

Demonstrates an asynchronous FTP upload. Unicode C++

#include <CkFtp2W.h>
#include <CkTaskW.h>

void ChilkatSample(void)
    {
    bool success = false;

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

    CkFtp2W ftp;

    ftp.put_Hostname(L"ftp.myftpserver.com");
    ftp.put_Username(L"mylogin");
    ftp.put_Password(L"mypassword");

    //  Connect and login to the FTP server.
    success = ftp.Connect();
    if (success != true) {
        wprintf(L"%s\n",ftp.lastErrorText());
        return;
    }

    //  Change to the remote directory where the file will be uploaded.
    success = ftp.ChangeRemoteDir(L"junk");
    if (success != true) {
        wprintf(L"%s\n",ftp.lastErrorText());
        return;
    }

    const wchar_t *localFilepath = L"qa_data/xml/hamlet.xml";
    const wchar_t *remoteFilename = L"hamlet.xml";

    //  Call the async version of the PutFile method to return a task object.
    //  The task object is loaded, but is in the Inert state -- meaning it is
    //  not yet scheduled to run on Chilkat's background thread pool.
    CkTaskW *task = ftp.PutFileAsync(localFilepath,remoteFilename);
    if (ftp.get_LastMethodSuccess() == false) {
        wprintf(L"%s\n",ftp.lastErrorText());
        return;
    }

    //  Before starting the task, tell it to keep an in-memory log of what would've been
    //  ProgressInfo callbacks.
    task->put_KeepProgressLog(true);

    //  Schedule the task for running on the thread pool.  This changes the task's state
    //  from Inert to Live.
    success = task->Run();
    if (success != true) {
        wprintf(L"%s\n",task->lastErrorText());
        delete task;
        return;
    }

    //  The application is now free to do anything else
    //  while the file is being uploaded.

    //  For this example, we'll simply sleep and periodically
    //  check to see if the upload is finished, and report the progress
    //  along the way.
    int curPctDone = 0;
    const wchar_t *name = 0;
    const wchar_t *value = 0;

    while (task->get_Finished() != true) {

        if (task->get_PercentDone() != curPctDone) {
            curPctDone = task->get_PercentDone();
            wprintf(L"%d percent done\n",curPctDone);
        }

        //  Check the progress info log.
        //  Emit any log entries..
        while ((task->get_ProgressLogSize() > 0)) {
            //  Get the 1st entry, emit it, and then remove it..
            name = task->progressInfoName(0);
            value = task->progressInfoValue(0);

            //  Entries reporting the sent byte count will have the name "SendByteCount"
            //  Entries reporting the current bytes-per-second will have the name "SendBytesPerSec"

            wprintf(L"%s: %s\n",name,value);
            task->RemoveProgressInfo(0);
        }

        //  Sleep 100 ms.
        task->SleepMs(100);

    }

    //  Just in case there are any remaining entries...
    while ((task->get_ProgressLogSize() > 0)) {
        //  Get the 1st entry, emit it, and then remove it..
        name = task->progressInfoName(0);
        value = task->progressInfoValue(0);
        wprintf(L"%s: %s\n",name,value);
        task->RemoveProgressInfo(0);
    }

    //  A finished task could be one that was canceled, aborted, or truly finished.  

    //  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 the result obtained via a GetResult* method.  (A "completed" task will
    //  have a StatusInt equal to 7.   If the task finished, but was not completed, then it must've
    //  been aborted or canceled:
    if (task->get_StatusInt() != 7) {
        wprintf(L"Task did not complete.\n");
        wprintf(L"task status: %s\n",task->status());
        delete task;
        return;
    }

    //  The PutFile method returns a boolean.  Therefore, after the task is finished,
    //  we can get the boolean result by calling GetResultBool.  This is the return value had
    //  we called PutFile synchronously.
    success = task->GetResultBool();
    if (success != true) {
        //  The task's ResultErrorText contains what would have been in the LastErrorText property had
        //  the GetFile method been called synchronously.
        wprintf(L"%s\n",task->resultErrorText());
    }
    else {
        wprintf(L"File uploaded asynchronously.\n");
    }

    delete task;

    success = ftp.Disconnect();
    }