HTML5 FileAPI `FileReader` for

HTML5 FileAPI FileReader for Node.JS (could potentially be modified to work with older browsers as well).

See https://github.com/node-file-api/file-api and https://developer.mozilla.org/en-US/docs/Web/API/FileReader

'use strict'; var FileReader = require('filereader') , fileReader = new FileReader() ; fileReader.setNodeChunkedEncoding(true || false); fileReader.readAsDataURL(new File('./files/my-file.txt')); // non-standard alias of `addEventListener` listening to non-standard `data` event fileReader.on('data', function (data) { console.log("chunkSize:", data.length); }); // `onload` as listener fileReader.addEventListener('load', function (ev) { console.log("dataUrlSize:", ev.target.result.length); }); // `onloadend` as property fileReader.onloadend', function () { console.log("Success"); });

Implemented API

Events

Event Payload

end

{ target: { nodeBufferResult: <Buffer> // non-standard , result: <Buffer|Binary|Text|DataURL> } }

progress

// fs.stat will probably complete before this // but possibly it will not, hence the check { lengthComputable: (!isNaN(file.size)) ? true : false , loaded: buffers.dataLength , total: file.size }

Non-W3C API

FileReader.setNodeChunkedEncoding() is a non-standard method which hints that the FileReader should chunk if possible

I.E. The file will be sent with the header Transfer-Encoding: chunked

The default is false since many webservers do not correctly implement the standard correctly, and hence do not expect or accept Transfer-Encoding: chunked from clients.

FileReader.on is a non-standard alias of addEventListener

EventTarget.target.nodeBufferResult is a non-standard property which is a Node.Buffer instance of the data.

FileReader.on('data', fn) is a non-standard event which passes a Node.Buffer chunk each time the progress event is fired.