// ReplaceFlickr
// version 0.1
// 2006-08-13
// Copyright (c) 2006, Brajesh Sachan
// Released under the GPL license
// http://www.gnu.org/copyleft/gpl.html
// --------------------------------------------------------------------
//
// This is a Greasemonkey user script.
//
// To install, you need Greasemonkey: http://greasemonkey.mozdev.org/
// Then restart Firefox and revisit this script.
// Under Tools, there will be a new menu item to "Install User Script".
// Accept the default configuration and install.
//
// To uninstall, go to Tools/Manage User Scripts,
// select "ReplaceFlickr", and click Uninstall.
//
// --------------------------------------------------------------------
//
// ==UserScript==
// @name ReplaceFlickr
// @namespace http://brajesh.wordpress.com/tag/greasemonkey
// @description Replaces all embedded flickr.com images with base64 encoded proxy urls.
// @include *
// ==/UserScript==
var links, link, match;
links = document.evaluate(
'//img[@src]',
document,
null,
XPathResult.UNORDERED_NODE_SNAPSHOT_TYPE,
null);
match_url = new RegExp('^http://(?:static.)?flickr\.com/.+$');
for (var i = 0; i < links.snapshotLength; i++)
{
link = links.snapshotItem(i);
match = match_url.exec(link.src);
if (match)
{
var oldlink = link.src;
link.src = 'http://www.boxofprox.com/index.php?q=' + base64_encode(oldlink);
}
}
function base64_encode(str)
{
var alnum='ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789._';
var out='';
var t,x,y,z;
for(var i=0;i<str.length;i+=3)
{
t=Math.min(3,str.length-i);
if(t==1)
{
x=str.charCodeAt(i);
out+=alnum.charAt((x>>2));
out+=alnum.charAt(((x&0X00000003)<<4));
out+='--';
}
else if(t==2)
{
x=str.charCodeAt(i);
y=str.charCodeAt(i+1);
out+=alnum.charAt((x>>2));
out+=alnum.charAt((((x&0X00000003)<<4)|(y>>4)));
out+=alnum.charAt(((y&0X0000000f)<<2));
out+='-';
}
else
{
x=str.charCodeAt(i);
y=str.charCodeAt(i+1);
z=str.charCodeAt(i+2);
out+=alnum.charAt((x>>2));
out+=alnum.charAt((((x&0x00000003)<<4)|(y>>4)));out+=alnum.charAt((((y&0X0000000f)<<2)|(z>>6)));
out += alnum.charAt((z&0X0000003f));
}
}
return out;
}
