Android image file sent to php upload image file is application/octet-stream type and not image/jpeg?

Question

Hello all hope someone can can help- To fininsh my android app I just need to finish the class were the user can upload there image to the server(MySql).

All works w

Answer 1

Some androids indeed upload using mime-type application/octet-stream instead of the correct one.

For that, i've made the following:

//the uploaded file
$img = $_FILES['img'];

//array for type if octet
$realMime = array(
    'useNew' => false,
    'type' => '' 
);

if($img['type'] == "application/octet-stream"){
    $imageMime = getimagesize($img['tmp_name']); // get temporary file REAL info
    $realMime['type'] = $imageMime['mime']; //set in our array the correct mime
    $realMime['useNew'] = true; //set to true for next if
}

//now check if we will use the realMime or the one sent by browser
//$mimeCheck is the things you want to check. In my case i just wanted PNG or JPG
if($realMime['useNew'] == true){ //if true, use realMime to check
    $mimeCheck = ($realMime['type'] != "image/png" && $realMime['type'] != "image/jpeg" && $realMime['type'] != "image/jpg");
}else{ //if not using real mime, go with the one browser sent us
    $mimeCheck = ($img['type'] != "image/png" && $img['type'] != "image/jpeg" && $img['type'] != "image/jpg");
}

//returns error if image not png/jpg/jpeg
if($mimeCheck){
    //return some error
}

With this you can check. Of course have to make an error handler for getimagesize() since user can upload an octet-stream file that isn't really an image.

For more info, read PHP.net getimagesize() doc