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OCaml RSS Feed Parser

Using Cameleon RSS Feed Parser

Looking for a way to parse RSS (or ATOM) feeds with OCaml, I performed a Google search on "ocaml rss":

Here is how to begin to use it...

Installing on Ubuntu/Debian

I assume the user has all de basic OCaml installation. Installing the RSS feed parser requires:

     sudo apt-get install libcameleon-ocaml-dev cameleon    

Getting a sample RSS file

Let's get the RSS2 file of OCamlCore:

The file is saved as "rss20.xml" use the -O option of wget if you want another saving name.

Using it in the toplevel

The user needs to load several modules:

        Objective Caml version 3.11.2       #use "topfind"                  ;;     #require "unix"                 ;;     #require "cameleon"             ;;     #require "cameleon.config_file" ;;     #require "cameleon.configwin"   ;;     #require "cameleon.ffind"       ;;     #require "cameleon.gdir"        ;;     #require "cameleon.gmylist"     ;;     #require "cameleon.gstuff"      ;;     #require "cameleon.okey"        ;;     #require ""      ;;     #load "/usr/lib/ocaml/cameleon/rss.cma";;    
Load the XML RSS file (Pretty Long output)
     let my_channel = Rss.channel_of_file "rss20.xml";;    
Get the list of items (Pretty Long output)
     let items = my_channel.Rss.ch_items);;    
Grab the first item
     List.hd items;;    
Get the title of that first item
     (List.hd items).Rss.item_title;;    


Please note that it is a quick and dirty way to do it, the reader is encouraged to suggest cleaner ways by commenting this post.


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