使用curl恢复ftp上传

Question

i'm buidling a php script to upload larges files from a local php server to a distant ftp server with log of progress in a mysql base. Evrything work fine, but i get problem with the resume function and i can't find any clear information of the process to follow to resume an ftp upload with curl. my code bellow :

$fp = fopen($localfile, 'r');

curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
curl_setopt($curl, CURLOPT_NOPROGRESS, false);
curl_setopt($curl, CURLOPT_PROGRESSFUNCTION, 'curlProgressCallback'); // lof progress to base
curl_setopt($curl, CURLOPT_READFUNCTION, 'curlAbortCallback'); // check if user request abort

curl_setopt($curl, CURLOPT_URL, $ftp);
curl_setopt($curl, CURLOPT_PORT, FTPPort);
curl_setopt($curl, CURLOPT_LOW_SPEED_LIMIT, 1000);
curl_setopt($curl, CURLOPT_LOW_SPEED_TIME, 20); 
curl_setopt($curl, CURLOPT_USERPWD, FTPLog . ":" . FTPPass);
curl_setopt($curl, CURLOPT_FTP_CREATE_MISSING_DIRS, true); 
curl_setopt($curl, CURLOPT_UPLOAD, 1);

if($resume){
    $startFrom=ftpFileSize($dest); // return the actual file size on the ftp server
}else{         
    $startFrom=false;        
}

if($startFrom){ 
    curl_setopt ($curl, CURLOPT_FTPAPPEND, 1);
    curl_setopt($curl, CURLOPT_RESUME_FROM, $startFrom);       
    fseek($fp, $startFrom, SEEK_SET);
    $sizeToUp=filesize($localfile);//-$startFrom;        
}else{               
    $sizeToUp=filesize($localfile);
}    
curl_setopt($curl, CURLOPT_INFILE, $fp);
curl_setopt($curl, CURLOPT_INFILESIZE, $sizeToUp);

curl_exec($curl); 

If someone call help me on this or redirect me on a valid example it will be very helfull and appreciate.

Tks for your feedback

Mr

Answer 1

So i've abort my research to make resume with curl, not enought help or documentation on it, And it's really more easy to do it with ftp_nb_put. So i f its can help someone, you can find a exemple of my final code bellow :

    define("FTPAdd","your serveur ftp address");                                    
    define("FTPPort",21);                                                           
    define("FTPTimeout",120);
    define("FTPLog","your login");                                                 
    define("FTPPass","your password"); 

    function ftpUp_checkForAndMakeDirs($ftpThread, $file) {
            $parts = explode("/", dirname($file));
            foreach ($parts as $curDir) {            
                if (@ftp_chdir($ftpThread, $curDir) === false) { // Attempt to change directory, suppress errors
                    ftp_mkdir($ftpThread, $curDir); //directory doesn't exist - so make it
                    ftp_chdir($ftpThread, $curDir); //go into the new directory
                }
            }
    }   
    function ftpUp_progressCallBack($uploadedData){
         global $abortRequested;
         //you can do any action you want while file upload progress, personaly, il log progress in to data base
         //and i request DB to know if user request a file transfert abort and set the  var $abortRequested to true or false
    }
    function ftpUp($src,$file,$dest,$resume){
            global $abortRequested; 

            $conn_id = ftp_connect(FTPAdd,FTPPort,FTPTimeout);
                if ($conn_id==false){
                        echo "FTP Connection problem";return false;                
                }else{
                        $login_res = ftp_login($conn_id, FTPLog, FTPPass);
                        if ($login_res){
                                $ftpThread=$conn_id;            
                        }else{
                                echo "FTP Authentification error";return false;
                        }
                }
            $fp = fopen($src, 'r');     

            ftpUp_checkForAndMakeDirs($ftpThread, $dest); //verif et creation de l'arborescence sur le serveur ftp
            ftp_set_option ($ftpThread, FTP_AUTOSEEK, TRUE); // indispensable pour pouvoir faire du resume

            if($resume){            
                $upload = ftp_nb_fput ($ftpThread, $file, $fp ,FTPUpMode, FTP_AUTORESUME);
            }else{
                $upload = ftp_nb_fput ($ftpThread, $file, $fp ,FTPUpMode);    
            }       
            ///////////////////////////////////////////////////////////////////////////////////
            //uploading process
            while ($upload == FTP_MOREDATA) {               
                //progress of upload                
                    ftpUp_progressCallBack(ftell ($fp));                
                //continue or abort 
                if(!$abortRequested){
                    $upload = ftp_nb_continue($ftpThread);
                }else{              
                    $upload = "userAbort";
                }            
             }
             ///////////////////////////////////////////////////////////////////////////////////
             //end and result                   
             ftpUp_progressCallBack(ftell ($fp));       

             if ($upload != FTP_FINISHED) {
                 @fclose($fp);
                 @ftp_close ($ftpThread);
                 if ($abortRequested){                              
                    echo "FTP Abort by user : resume needed";
                 }else{
                    echo "FTP upload error : ".$upload." (try resume)";
                 }
             }else{
                @fclose($fp);
                @ftp_close ($ftpThread);
                echo "upload sucess";
             }

    } 


    $file="test.zip";
    $src = "FilesToUp/" . $file; 
    $destDir = "www/data/upFiles/";
    $dest = $destDir . $file;
    $abortRequested=false;

    ftpUp($src,$file,$dest,true);