What makes the ng-file-upload Upload service so special?

Why do I need to use the Upload service with ng-file-upload in this specific way?

Upload.upload({
    url: '/postMyFormHere',
    data:   {
        fileToUpload: model.file,
        someField1: model.field1,
        someField2: model.field2,
    }
})

Can't I just simplify it like this?

  $http({
        method: 'post',
        headers: {
            'content-type': 'multipart/form-data'},
        url: '/postMyFormHere',
        data: {
            fileToUpload: model.file,
            someField1: model.field1,
            someField2: model.field2,
            }
    })

I thought ng-file-upload was just for binding files from inputs to the model. Shouldn't Angular be able to handle a multipart/form-data POST request natively?

Edit:

I've been attempting to make my multipart post work through $http. I modified the header to:

"multipart/form-data; boundary=----WebKitFormBoundarypEvyJj8BAuq4lk7T"

But I encountered this error on my express server

Error: Multipart: Boundary not found

I assume that the purpose of the Upload service is to parse the POST payload with the multipart boundary correctly, right?

Answer №1

It is completely possible to handle file uploads, the main issue with modules designed for this purpose is browser compatibility. Only IE10 and above support the FormData() object. If you need to cater to older browsers, you will have to find a workaround using the <iframe> strategy or utilize existing libraries that offer similar functionality.

LATEST UPDATE

var fd = new FormData();
fd.append('file', model.file);
$http.post(uploadUrl, fd, {
    transformRequest: angular.identity,
    headers: {'Content-Type': undefined}
})

Give this method a try!

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