daviddahl
/ gist:1095855
Created
July 20, 2011 20:31
— forked from jonleighton/base64ArrayBuffer.js
Encode an ArrayBuffer as a base64 string
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| // Converts an ArrayBuffer directly to base64, without any intermediate 'convert to string then | |
| // use window.btoa' step. According to my tests, this appears to be a faster approach: | |
| // http://jsperf.com/encoding-xhr-image-data/5 | |
| function base64ArrayBuffer(arrayBuffer) { | |
| var base64 = '' | |
| var encodings = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/' | |
| var bytes = new Uint8Array(arrayBuffer) | |
| var byteLength = bytes.byteLength |