O'Reilly logo

Practical Internet Groupware by Jon Udell

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

Web: URL Schemes

A series of RFCs document URL schemes based on a variety of protocols. These include:

RFC2255 (December 1996, The LDAP URL Format)

Enables web-style access to LDAP servers. For example, my entry in the Switchboard directory is accessible, from a browser, using the URL:

ldap://ldap.switchboard.com/cn%3DJon%20Udell%2C%20ou%3DZEDHINGL%2C%20o%3Dswitchboard%2C%20c%3DUS
RFC2192 (September 1997, IMAP URL Scheme)

Defines an imap: URL scheme that supports web-style references to objects (e.g., messages) that live on IMAP servers.

RFC2368 (July 1998, The mailto URL Scheme)

Extends the mailto: scheme defined in RFC1738, enabling the message composition and filtering techniques that we saw in Chapter 4 and Chapter 9.

RFC2384 (August 1998, The POP URL Scheme)

According to RFC2384, “A POP3 mailbox (like an [IMAP4] mailbox) is a network resource, and URLs are a widely supported generalized representation of network resources. A means of specifying a POP3 mailbox as a URL will likely be useful in many programs and protocols.”

Finally, here’s a bit of web trivia. If you store the following text in a file:

<IMG SRC="data:image/gif;base64,R0lGODdhMAAwAPAAAAAAAP///ywAAAAAMAAw AAAC8IyPqcvt3wCcDkiLc7C0qwyGHhSWpjQu5yqmCYsapyuvUUlvONmOZtfzgFz ByTB10QgxOR0TqBQejhRNzOfkVJ+5YiUqrXF5Y5lKh/DeuNcP5yLWGsEbtLiOSp a/TPg7JpJHxyendzWTBfX0cxOnKPjgBzi4diinWGdkF8kjdfnycQZXZeYGejmJl ZeGl9i2icVqaNVailT6F5iJ90m6mvuTS4OK05M0vDk0Q4XUtwvKOzrcd3iq9uis F81M1OIcR7lEewwcLp7tuNNkM3uNna3F2JQFo97Vriy/Xl4/f1cf5VWzXyym7PH hhx4dbgYKAAA7" ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required