typeset rss feed

typeset rss feed

[Jelle Huisman]

Hello all,

I'd like to typeset an RSS feed and I was wondering whether I could
instruct ConTeXt to fetch the contents of a url like:
http://feeds.bbci.co.uk/news/rss.xml
Thanks for any pointers,

Jelle
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Re: typeset rss feed

[Philipp Gesang]

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Hi Jelle,

On 2012-04-20 16:15, Jelle Huisman wrote:
> Hello all,
> 
> I'd like to typeset an RSS feed and I was wondering whether I could
> instruct ConTeXt to fetch the contents of a url like:
> http://feeds.bbci.co.uk/news/rss.xml
> Thanks for any pointers,

the fetching part is easy as we have LuaSocket:

········································································
\starttext
\startluacode
  local bbc_rss = socket.http.request"http://feeds.bbci.co.uk/news/rss.xml"
  context["type"](bbc_rss)
\stopluacode
\stoptext \endinput
········································································

In your document, however, you will want to save the file locally
for a given Context session and reuse the local copy to avoid
re-fetching it on every pass. Maybe use the timestamp to force
a fresh fetch after some time.

Regards
Philipp


> 
> Jelle
> ___________________________________________________________________________________
> If your question is of interest to others as well, please add an entry to the Wiki!
> 
> maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
> webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net
> archive  : http://foundry.supelec.fr/projects/contextrev/
> wiki     : http://contextgarden.net
> ___________________________________________________________________________________

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___________________________________________________________________________________
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___________________________________________________________________________________

Re: typeset rss feed

[Jelle Huisman]

On 04/20/2012 04:40 PM, Philipp Gesang wrote:
> Hi Jelle,
> 
> On 2012-04-20 16:15, Jelle Huisman wrote:
>> Hello all,
>>
>> I'd like to typeset an RSS feed and I was wondering whether I could
>> instruct ConTeXt to fetch the contents of a url like:
>> http://feeds.bbci.co.uk/news/rss.xml
>> Thanks for any pointers,
> 
> the fetching part is easy as we have LuaSocket:

Hi Philip,

Thank you, that was precisely what I was looking for. I knew that I had
seen LuaSocket before, but I could not find it.

Jelle
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___________________________________________________________________________________

Re: typeset rss feed

[Aditya Mahajan]

On Fri, 20 Apr 2012, Jelle Huisman wrote:

> I'd like to typeset an RSS feed

I was also recently thinking along these lines (set a cron job to typeset 
RSS feed into pdf and email to kindle). So, please release your code 
once you are done.

> and I was wondering whether I could
> instruct ConTeXt to fetch the contents of a url like:
> http://feeds.bbci.co.uk/news/rss.xml

Suppose you write a macro

      \processrssfile{...}

that takes a local rss file and typesets it, then you can simply call

     \processrssfile{\locfilename{http://feeds.bbci.co.uk/news/rss.xml}}

to process a remote file. ConTeXt downloads and caches the file. On 
subsequent calls, the cached file is used. IIRC, the cache remains valid 
for a day and it is possible to change the threshold after which a new 
file is fetched.

FWIW, I have added this to t-vim.tex so it can pretty-print remote files. 
This only works with http:// or ftp:// and not with https://

Aditya
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