If you have not already liked a blog posting, you can do so by sending a request to the web address of the collection categorized by term
for the blog posting.
1. You can only like an entry once. To find out whether you have already liked an entry, retrieve a list of the people who have liked the entry and see if your name is included. See Getting a list of recommenders
for more details. Alternatively, complete the following steps:
<app:categories fixed="yes" />
a. Retrieve an entries feed that contains the entry. See Getting a feed of the latest posts added to all blogs or Getting a feed of recent posts for a blog for more information.
b. Find the collection element categorized by term recommend for the entry, and then look for a <app:accept/> element. If this element is present, you have already liked this entry and cannot do so again. If no <app:accept/> is present, you have not liked the entry yet. For example, the collection categorized by recommend for an entry that you have not liked would appear as follows:
2. To like the entry, send an empty POST request to the web address listed as the href
of the app:collection