gecko/dom/workers/test/fileReaderSync_worker.js

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var reader = new FileReaderSync();
/**
* Expects an object containing a file and an encoding then uses a
* FileReaderSync to read the file. Returns an object containing the
* file read a binary string, text, url and ArrayBuffer.
*/
onmessage = function(event) {
var file = event.data.file;
var encoding = event.data.encoding;
var rtnObj = new Object();
if (encoding != undefined) {
rtnObj.text = reader.readAsText(file, encoding);
} else {
rtnObj.text = reader.readAsText(file);
}
rtnObj.bin = reader.readAsBinaryString(file);
rtnObj.url = reader.readAsDataURL(file);
rtnObj.arrayBuffer = reader.readAsArrayBuffer(file);
postMessage(rtnObj);
};