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String to ArrayBuffer

From: Charles Pritchard <chuck@jumis.com>
Date: Wed, 11 Jan 2012 14:45:00 -0800
Message-ID: <4F0E10EC.2080605@jumis.com>
To: Webapps WG <public-webapps@w3.org>
Currently, we can asynchronously use BlobBuilder with FileReader to get 
an array buffer from a string.
We can of course, use code to convert String.fromCharCode into a 
Uint8Array, but it's ugly.

The StringEncoding proposal seems a bit much for most web use:
http://wiki.whatwg.org/wiki/StringEncoding

All we really ever do is work on DOMString, and that's covered by UTF8.

As following file shows, DOMString to ArrayBuffer conversion is about 30 
lines of code (start at line 125):
http://code.google.com/p/stringencoding/source/browse/encoding.js

It seems like this kind of type conversion could be handled more 
efficiently and be less error prone on programmers like myself, who 
often forget to test with multibyte strings.

I'm sure this has popped up many times before on the list. Thought I'd 
put it out there again.
We could just tweak the ArrayBuffer constructor to support DOMString as 
an argument.
Currently, it supports length.

-Charles
Received on Wednesday, 11 January 2012 22:45:30 GMT

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