I'm uploading a file with XMLHttprequest. Here is the JS function, that uploads a file:
var upload = function(file) {
// Create form data
var formData = new FormData();
formData.append('file', file);
var xhr = new XMLHttpRequest();
// Open
xhr.open('POST', this.options.action);
// Set headers
xhr.setRequestHeader("Cache-Control", "no-cache");
xhr.setRequestHeader("X-Requested-With", "XMLHttpRequest");
xhr.setRequestHeader("Content-Type", "multipart/form-data");
xhr.setRequestHeader("X-File-Name", file.fileName);
xhr.setRequestHeader("X-File-Size", file.fileSize);
xhr.setRequestHeader("X-File-Type", file.type);
// Send
xhr.send(formData);
}
On the server side, in upload.php I read the file this way:
file_put_contents($filename, (file_get_contents('php://input')));
Everything works fine, except that I get a PHP Warning:
Missing boundary in multipart/form-data POST data in Unknown on line 0
.
If I remove this line:
xhr.setRequestHeader("Content-Type", "multipart/form-data");
the warning goes away.
What should be the problem here?
Well this is strange a little bit for me, but this is what worked:
// Open
xhr.open('POST', this.options.action, true);
// !!! REMOVED ALL HEADERS
// Send
xhr.send(formData);
In this case, on server side I don't read the file sent via php://input
but the file will be in the $_FILES
array.
This solved my problem, but I'm still curious why appears now the file in $_FILES
?
Tested in Chrome, Mozilla, Safari, and IE10.