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up vote 4 down vote favorite
2

Ok, so I try to read a PDF file like this: 

reader.readAsArrayBuffer(file);

and then try to send it to the server using $http like this:

$http.put(url, data, {headers: {'Content-Type': 'application/pdf'}});

So, just read & send the binary to the server in raw form. According to some resources I found, passing an ArrayBuffer to XHR should work, but passing it as data to $http just results in a request body like this: {} and Content-Length=2

Reading the file readAsBinaryString() results in a corrupted file (and is apparently deprecated for that very reason)

The use case seems so trivial to me, am I missing something?

Chrome 36, Angular 1.2.20

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2 Answers 2

up vote 10 down vote accepted

You have to use reader.readAsArrayBuffer(file); then in the onload callback create an ArrayBufferView from the result:

new Uint8Array(reader.result)

pass that data to $http and overwrite the transformRequest property so angularjs doesn't encode your array into json:

reader.onload = function() {
    $http({
        method: 'PUT', 
        headers: {'Content-Type': 'application/pdf'}, 
        data: new Uint8Array(reader.result), 
        transformRequest: []
    })
};
reader.readAsArrayBuffer(file);
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Is it just standard behaviour for AngularJS to encode everything into json? I don't see why one would encode byte arrays as json data. – Kristian Barrett Aug 6 '14 at 13:13
    
@tbaetz: I was banging my head for almost two days with it... Thanks for that answer. – jjczopek Mar 28 at 10:07
    
@tbaetz: Half a day of work, and finally saved by your solution. You're great, man. – blas3nik Sep 24 at 12:13
up vote 1 down vote

Is it because you are just handing the $http method the array buffer instead of writing that buffer into a byte array? If so what you are posting to the server is probably just the arraybuffer object.

Check this post on how to write ArrayBuffer to byte array: How do I read binary data to a byte array in Javascript?

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Almost, but without overriding transformRequest it still won't work. – joerx Aug 6 '14 at 11:53

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