Simon Willison’s Weblog

Cross Browser Base64 Encoded Images Embedded in HTML (via) Scarily clever. View the PHP source to see what’s going on—most browsers get image tags that use data URIs starting with data:image/png;base64, but IE gets served a Content-type:message/rfc822 header and a MIME formatted multipart/related document, as used by e-mail clients to embed inline image attachments.

# 17th April 2009, 4:12 pm / base64, browsers, hedger-wang, ie, internet-explorer, mime, php

URLsafe base64 encoding/decoding in two lines. A much better solution than my base65 hack—if you understand how base64 padding works (I didn’t) you can use it to generate URL-safe compressed hashes. Performance should be significantly better than my version.

# 28th August 2008, 9:57 am / base64, base65, python, urlsafe