REST Webservice HTTP_PUT parameter - php

Question

I make with tonic (php library for rest ) a rest webservice.
I use according to CRUD and REST put for editing a element.
So i call my method with a picture and filetype and parse the paramters and save the base64 encoded file on my server.
Code:
function put($request) {
$response = new Response($request);
$msg = new ErrorMessage();
$dbmodel = new DBModel();
$arr = array('Data' => null,'Message' =>null,'Code' => null);
try{
$split = explode ('&',$request->data);
$para = array();
foreach($split as $i) {
$names = explode('=',$i);
if(!isset($names[0]) or !isset($names[1]))
{
throw new Exception();
}
$para[$names[0]] = $names[1];
}
}
catch(Exception $e)
{
$arr['Code'] = 400;
$arr['Message'] = $msg->getMessage(400);
$response->body = json_encode($arr);
return $response;
}
if (isset($para['picture']) or isset($para['filetype']) )
{
if (isset($para['picture']) and isset($para['filetype']))
{
if (!($para['filetype'] == 'jpg' || $para['filetype'] == 'png'))
{
$arr['Code'] = 688;
$arr['Message'] = $msg->getMessage(617);
$response->body = json_encode($arr);
return $response;
}
$bin = base64_decode($para['picture']);
if (strlen($bin) >524288)
{
$arr['Code'] = 617;
$arr['Message'] = $msg->getMessage(617);
$response->body = json_encode($arr);
return $response;
}
$uid = $dbmodel->getUid($sid);
if($uid<1)
{
$arr['Code'] = 699;
$arr['Message'] = $msg->getMessage(699);
$response->body = json_encode($arr);
return $response;
}
$file = fopen($_SERVER['DOCUMENT_ROOT']."/img/".$uid.".".$para['filetype'], 'wb');
fwrite($file, $bin);
fclose($file);
}
else
{
$arr['Code'] = 616;
$arr['Message'] = $msg->getMessage(616);
$response->body = json_encode($arr);
return $response;
}
}
$arr['Code'] = 200;
$arr['Message'] = $msg->getMessage(200);
$response->body = json_encode($arr);
return $response;
}
Problem: The saved picture isn't like the original one it can't be displayed as image
I use http://www.redio.info/werkzeuge/file2base64.html to convert my picture into base64. I think that the problem could be in the parsing at the beginning of my code.
Original: 13.872 Bytes
New Image: 14.313 Bytes

Answer 1

Your picture parameter gets probably urlencoded, that would explain the bigger filesize. (e.g. '/' to %2F)
Try to put a urldecode around the parameter before you decode it.
$bin = base64_decode(urldecode($para['picture']));