Question

I need to upload a pic on server without using html form tag. Is there a simple to do this. Actually, i have been building an app where user will be allowed to either upload his pic or take a new one from webcam and if user click the upload button then the pic move to the server.
When user upload pic and press upload button, it works fine because i have been using HTML input tag with type=’file’ but when i take pic from webcam and render it on HTML5 canvas tag then i click the upload button, no pic move to the server because there is no file in the input tag. In both cases, i am using the same canvas element and img tag to show it the user.

IS there a way to upload without using form element or is there a way that i can assign an image object that i get from Canavas element into the same form input element??

all answers are welcome

Many thanks in advance

server side code

    function bytesToSize1024($bytes, $precision = 2) {
    $unit = array('B','KB','MB');
    return @round($bytes / pow(1024, ($i = floor(log($bytes, 1024)))), $precision).' '.$unit[$i];
}

$sFileName = $_FILES['image_file']['name'];
$sFileType = $_FILES['image_file']['type'];
$sFileSize = bytesToSize1024($_FILES['image_file']['size'], 1);

 $target = "upload/"; 
 $target = $target . basename( $_FILES['uploaded']['name']) ; 
 $ok=1;
$error=$_FILES["image_file"]["error"];


$uploaddir = '/var/www/example119/upload/';
$uploadfile = $uploaddir . basename($_FILES['image_file']['name']);

  if(!empty($_FILES))
  {
     if(move_uploaded_file($_FILES['image_file']['tmp_name'], "$target$sFileName")) 
     {
     echo "The file ". basename( $_FILES['image_file']['name']). " has been uploaded...";
     } 
     else {
     echo "Sorry, there was a problem uploading your file. {$error}";
     }
  }
  else
    {
    echo "_files is empty";
    }

Javascipt code to make an HTTPrequest

function startUploading() {
    // cleanup all temp states

    iPreviousBytesLoaded = 0;
    var oProgress = document.getElementById('progress');
    oProgress.style.display = 'block';
    oProgress.style.width = '0px';

    // get form data for POSTing
    //var vFD = document.getElementById('upload_form').getFormData(); // for FF3
    var vFD = new FormData(document.getElementById('upload_form')); // this is for when user upload from browser box
    var vvFD=document.getElementById('preview1'); //added by TODO to test
    // create XMLHttpRequest object, adding few event listeners, and POSTing our data
    var oXHR = new XMLHttpRequest();        
    oXHR.upload.addEventListener('progress', uploadProgress, false);
    oXHR.addEventListener('load', uploadFinish, false);
    oXHR.addEventListener('error', uploadError, false);
    oXHR.addEventListener('abort', uploadAbort, false);
    oXHR.open('POST', 'example_upload/upload.php');
    //oXHR.send(vFD);
    oXHR.send(vvFD);

    // set inner timer
    oTimer = setInterval(doInnerUpdates, 300);
}

Answer 1

Maybe you should try sending the image data via POST. It doesn’t have any size restrictions, and the contents can follow any format.