javascript - Get binary data with XMLHttpRequest in a Firefox extension

I'm trying to download some binary data from my Firefox extension. When I try to set a created XMLHttpRequest to arraybuffer mode:

oHTTP = new XMLHttpRequest();   
oHTTP.responseType = "arraybuffer";

The error

InvalidStateErr
An attempt was made to use an object that is not, or is no longer, usable

is thrown.

Is there another way to download binary data in a Firefox extension?

I'm trying to download some binary data from my Firefox extension. When I try to set a created XMLHttpRequest to arraybuffer mode:

oHTTP = new XMLHttpRequest();   
oHTTP.responseType = "arraybuffer";

The error

InvalidStateErr
An attempt was made to use an object that is not, or is no longer, usable

is thrown.

Is there another way to download binary data in a Firefox extension?

Share Improve this question asked Nov 4, 2012 at 7:33 dmi_ 1,2572 gold badges13 silver badges26 bronze badges

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1 Answer 1

Sorted by: Reset to default 9

You must call the open method first.