Make mailto: links open the Gmail compose page.
The Web comprises many kinds of resources: web pages, newsgroups, IRC channels, FTP sites, and so on. Each kind of resource has a scheme, such as the
http: in http://mozilla.org or the
irc: in irc://irc.mozilla.org/firefox.
You've probably seen
mailto: links on contact pages; when you click the link, it launches an external email program.
But what if you use a web mail service such as Gmail? Normally, getting
mailto: links to launch a web-based email application is nontrivial. You would basically need to write an external mail program that switched back to your browser and opened the appropriate URL. What a pain! This hack solves the problem another way, by rewriting
mailto: links to point to the Gmail Compose page.
This user script runs on all pages. From a high-level view, it sounds deceptively simple. Just find all the
mailto: links, parse them, and replace them with links to Gmail. When you click the link, the browser just redirects to the Gmail Compose page instead of launching a separate application.
Of course, it's not really that simple. The problem is that
mailto: links can be complex. RFC 2368, entitled "The mailto URL scheme," specifies the format. The overall structure is
<querystring> is a list of
<name>=<value> pairs separated by ampersands (
&). We want to pass these name/value pairs to Gmail, but, of course, Gmail's Compose page uses a different ...