Mailing List Archive: 49091 messages
  • Home
  • Script library
  • AltME Archive
  • Mailing list
  • Articles Index
  • Site search
 

[REBOL] Re: REBOL Script to convert REBOL format to RSS XML

From: premshree:pillai:gmai:l at: 31-Dec-2004 14:27

On Fri, 31 Dec 2004 14:24:46 +0530, Premshree Pillai <[premshree--pillai--gmail--com]> wrote:
> Hi Gregg, > > This looks nice. Thanks! :) > > Some rework may be required for the pubDate, though. The to-idate > returns something like "Thu, 30 Dec 2004 0:00 +0000". For it to be > validated, it must be "Thu, 30 Dec 2004 00:00:00 +0000". The change is > required in the time, that is. It's a minor problem, though.
Umm, looks like to-idate generates dates of the type "Tue, 9 Mar 2004 1:00:25 -0800" too, which would validate against the feed validator. However, this seems inconsistent(?). Maybe somebody who has a better idea can hack on this.
> If anybody's interested in further hacking, these URLs could be useful: > * RSS 2.0 specification: http://blogs.law.harvard.edu/tech/rss > * Valid date types for RSS 2.0: > http://feedvalidator.org/docs/error/InvalidRFC2822Date.html > > On Thu, 30 Dec 2004 17:12:12 -0700, Gregg Irwin > <[greggirwin--mindspring--com]> wrote: > > > > Hi Premshree, > > > > PP> Anyway, I wrote a small script that generates valid RSS 2.0 feeds from > > PP> the REBOL data for Carl's blog. The code is available here: > > PP> http://premshree.seacrow.com/code/rebol/carl-rss.r/download > > > > Very cool! > > > > PP> If there are improvements possible, please point so/do so. :) > > > > I did a quick re-hack of things, just to show you some different > > approaches. Others may chime in with more thoughts as well. Some of > > the things I thought about when evaluating your code: > > > > * Use path notation instead of SELECT > > > > * Don't use temporary vars if you don't need to > > > > * Tags are a valid datatype, you don't need to make them strings > > > > * JOIN (and REJOIN) build new strings, meaning lots of allocation > > and work for the GC. INSERT, APPEND, and their ilk just add on > > to an existing series; also saves reassigning the value. > > > > * See what refinements date! values offer to see if you need to > > convert them to strings to do what you want. > > > > * REPEAT is faster than FOR if you're going from 1 and > > incrementing by 1. FOREACH makes things even easier most times. > > > > I did a couple more advanced things in there (note the tick on the > > MAKE-ENTRY 'key parameter) and did some others to give you some things > > to take apart and think about. Holler away if you have questions. > > > > BTW, this was a very quick hack, so I don't know if, for example, > > TO-IDATE gives a valid format as far as RSS is concerned. > > > > -- Gregg > > > > REBOL [ > > Title: "RSS Generator for Carl's Blog" > > Date: 31-Dec-2004 > > File: %carl-rss.r > > Home: http://www.livejournal.com/~premshree > > Author: ["Premshree Pillai" "Gregg Irwin"] > > Version: 0.0.2 > > Purpose: { > > Generates valid RSS 2.0 feeds for Carl's blogs > > } > > Comment: { > > Massive code changes for instructional purposes. --Gregg > > } > > ] > > > > ;; channel data > > channel: [ > > title "Carl's REBOL Blog - Vive la REBOLution" > > link http://www.rebol.net/ > > description "describes this blog channel" > > language "en" ;"English" > > copyright "2005 Carl Sassenrath" > > generator "REBOL Messaging Language" > > ] > > > > ;; blog items go here > > items: [ > > [ > > title "Blog item title...." > > link http://www.rebol.net/cgi-bin/blog.r?view=0080 > > author "Carl Sassenrath" > > pubdate 30-Dec-2004/0:0:0 > > content {the blog goes here} > > ] > > [ > > title "Blog item title 2...." > > link http://www.rebol.net/cgi-bin/blog.r?view=0081 > > author "Carl Sassenrath" > > pubdate 31-Dec-2004/0:0:0 > > content {the blog 2 goes here} > > ] > > ] > > > > ;-- No Changes needed below this point ------------------------- > > > > make-entry: func [series 'key] [ > > rejoin [tab to tag! :key series/:key to tag! join #"/" :key] > > ] > > > > channel-entry: func ['key] [make-entry channel :key] > > > > channel-entries: func [keys [block!] /local result] [ > > result: copy "" > > foreach key keys [append result join channel-entry :key newline] > > result > > ] > > > > output: copy "" > > > > repend output [ > > <?xml version='1.0' encoding='utf-8' ?> <rss version='2.0'> newline > > <channel> newline > > channel-entries [title link description language copyright generator] > > ] > > > > foreach item items [ > > repend output [ > > tab <item> newline > > tab tab <guid isPermaLink='true'> item/link </guid> newline > > tab tab <pubDate> to-idate item/pubdate </pubDate> newline > > tab tab <title> item/title </title> newline > > tab tab <link> item/link </link> newline > > tab tab <description> item/content </description> newline > > tab </item> newline > > ] > > ] > > repend output [</channel> newline </rss>] > > > > ;print output > > ;halt > > write %carl-rss2.xml output > > > > -- > > To unsubscribe from the list, just send an email to rebol-request > > at rebol.com with unsubscribe as the subject. > > > > > > -- > Premshree Pillai > http://www.livejournal.com/~premshree >
-- Premshree Pillai http://www.livejournal.com/~premshree