How to encode a URL as a CakePHP parameter

Question

I would like to create a bookmarklet for adding bookmarks. So you just click on the Bookmark this Page JavaScript Snippet in your Bookmarks and you are redirected to the page.

This is my current bookmarklet:

"javascript: location.href='http://…/bookmarks/add/'+encodeURIComponent(document.URL);"

This gives me an URL like this when I click on it on the Bookmarklet page:

http://localhost/~mu/cakemarks/bookmarks/add/http%3A%2F%2Flocalhost%2F~mu%2Fcakemarks%2Fpages%2Fbookmarklet

The server does not like that though:

The requested URL /~mu/cakemarks/bookmarks/add/http://localhost/~mu/cakemarks/pages/bookmarklet was not found on this server.

This gives the desired result, but is pretty useless for my use case:

http://localhost/~mu/cakemarks/bookmarks/add/test-string

There is the CakePHP typical mod_rewrite in progress, and it should transform the last part into a parameter for my BookmarksController::add($url = null) action.

What am I doing wrong?

poplitea · Accepted Answer · 2011-08-31 11:50:29Z

2

I had a similar problem, and tried different solutions, only to be confused by the cooperation between CakePHP and my Apache-config.

My solution was to encode the URL in Base64 with JavaScript in browser before sending the request to server.

Your bookmarklet could then look like this:

javascript:(function(){function myb64enc(s){s=window.btoa(s);s=s.replace(/=/g, '');s=s.replace(/\+/g, '-');s=s.replace(/\//g, '_');return s;} window.open('http://…/bookmarks/add/'+myb64enc(window.location));})()

I make two replacements here to make the Base64-encoding URL-safe. Now it's only to reverse those two replacements and Base64-decode at server-side. This way you won't confuse your URL-controller with slashes...

answered Aug 31, 2011 at 11:50

poplitea

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3 Comments

Martin Ueding Over a year ago

This works. But what happens to the = if you do not replace it with anything. Is it not needed?

poplitea Over a year ago

=is padding, and isn't strictly needed. Check here for explanation of padding. PHP can decode Base64 without padding.

poplitea Over a year ago

Hmm, that's a pity... The function window.btoa(s) isn't supported by IE8. Sorry.

Martin Ueding · Accepted Answer · 2011-08-31 14:13:55Z

2

Bases on poplitea's answer I translate troubling characters, / and : manually so that I do not any special function.

function esc(s) {
    s=s.replace(/\//g, '__slash__');
    s=s.replace(/:/g, '__colon__');
    s=s.replace(/#/g, '__hash__');
    return s;
}

In PHP I convert it back easily.

$url = str_replace("__slash__", "/", $url);
$url = str_replace("__colon__", ":", $url);
$url = str_replace("__hash__", "#", $url);

I am not sure what happens with chars like ? and so …

edited Aug 31, 2011 at 14:13

answered Aug 31, 2011 at 13:37

Martin Ueding

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Comments

sukinsan · Accepted Answer · 2011-08-31 11:40:24Z

0

Not sure, but hope it helps you should add this string to yout routs.php

Router::connect (
  '/crazycontroller/crazyaction/crazyparams/*',
  array('controller'=>'somecontroller', 'action'=>'someaction')
);

and after that your site will able to read url like this

http://site.com/crazycontroller/crazyaction/crazyparams/http://crazy.com

answered Aug 31, 2011 at 11:40

sukinsan

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