Documentation: links/trackback.php

links/trackback.php - Process trackback requests

TrackBack is a framework for peer-to-peer communication and notifications between web sites. The central idea behind TrackBack is the idea of a TrackBack ping, a request saying, essentially, "resource A is related/linked to resource B." A TrackBack "resource" is represented by a TrackBack Ping URL, which is just a standard URI.

Here is an example of TrackBack. Note that line breaks have been inserted for readability.

POST http://www.foo.com/yacs/links/trackback.php?anchor=article:123
Content-Type: application/x-www-form-urlencoded

title=Foo+Bar
&url=http://www.bar.com/
&excerpt=My+Excerpt
&blog_name=Foo

Using TrackBack, sites can communicate about related resources. For example, if Weblogger A wishes to notify Weblogger B that he has written something interesting/related/shocking, A sends a TrackBack ping to B.

This script can be triggered either remotely, by some weblog software POSTing trackback attributes, or locally, through some GET access to a form aiming to collect these attributes.

Basically, the form will be used by those who want to be referenced by your server but that don't have a trackback-enable platform. Others will operate remotely and silently.

Note: it's useless to ask for surfers to be authenticated, since trackback posts are anonymous by construction. Check how to harden this script agains spammers and hackers.

Note that YACS also has a client implementation of the trackback specification into links/links.php.

Accepted calls:

trackback.php/<type>/<id> create a new link for this anchor
trackback.php?anchor=<type>:<id> create a new link for this anchor
trackback.php/<id> create a new link for the anchor 'article:<id>'

If the anchor for this item specifies a specific skin (option keyword 'skin_xyz'), or a specific variant (option keyword 'variant_xyz'), they are used instead default values.

This script is a reference file of this system.

Voir aussi:

Licence: GNU Lesser General Public License

Auteurs:

Bernard Paques bernard.paques@bigfoot.com