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annotate mod_pubsub_feeds/feeds.lib.lua @ 4047:36b6e3e3f9e2

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mod_conversejs: Disable automatic BOSH/WS endpoint discovery Converse.js 7.0 will enable this by default, but when using this module the BOSH and WebSocket endpoints are provided in the generated HTML, so automatic discovery is not needed and unlikely to work without an additional module.
author Kim Alvefur <zash@zash.se>
date Thu, 18 Jun 2020 15:24:34 +0200
parents 649f733aa3dc
children c402b273f2e3
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b149ea428b81 mod_pubsub_feeds: Switch to use util.xml for parsing feeds and include RSS to Atom translation code from lua-feeds
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1 local st = require "util.stanza";
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2 -- RSS->Atom translator
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3 -- http://code.matthewwild.co.uk/lua-feeds/
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4
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5 -- Helpers to translate item child elements
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6 local rss2atom = {};
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7 function rss2atom.title(atom_entry, tag)
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8 atom_entry:tag("title"):text(tag:get_text()):up();
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9 end
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10
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11 function rss2atom.link(atom_entry, tag)
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12 atom_entry:tag("link", { href = tag:get_text() }):up();
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13 end
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15 function rss2atom.author(atom_entry, tag)
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16 atom_entry:tag("author")
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17 :tag("email"):text(tag:get_text()):up()
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18 :up();
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19 end
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21 function rss2atom.guid(atom_entry, tag)
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22 atom_entry:tag("id"):text(tag:get_text()):up();
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23 end
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25 function rss2atom.category(atom_entry, tag)
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26 atom_entry:tag("category", { term = tag:get_text(), scheme = tag.attr.domain }):up();
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27 end
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29 function rss2atom.description(atom_entry, tag)
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30 atom_entry:tag("summary"):text(tag:get_text()):up();
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31 end
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33 local months = {
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34 jan = "01", feb = "02", mar = "03", apr = "04", may = "05", jun = "06";
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35 jul = "07", aug = "08", sep = "09", oct = "10", nov = "11", dec = "12";
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36 };
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37
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38 function rss2atom.pubDate(atom_entry, tag)
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39 local pubdate = tag:get_text():gsub("^%a+,", ""):gsub("^%s*", "");
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40 local date, month, year, hour, minute, second, zone =
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41 pubdate:match("^(%d%d?) (%a+) (%d+) (%d+):(%d+):?(%d*) ?(.*)$");
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42 if not date then return; end
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43 if #date == 1 then
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44 date = "0"..date;
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45 end
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46 month = months[month:sub(1,3):lower()];
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47 if #year == 2 then -- GAH!
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48 if tonumber(year) > 80 then
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49 year = "19"..year;
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50 else
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51 year = "20"..year;
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52 end
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53 end
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54 if zone == "UT" or zone == "GMT" then zone = "Z"; end
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55 if #second == 0 then
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56 second = "00";
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57 end
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58 local date_string = string.format("%s-%s-%sT%s:%s:%s%s", year, month, date, hour, minute, second, zone);
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59 atom_entry:tag("published"):text(date_string):up();
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60 end
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61
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62 -- Translate a single item to atom
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63 local function translate_rss(rss_feed)
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64 local feed = st.stanza("feed", { xmlns = "http://www.w3.org/2005/Atom" });
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65 local channel = rss_feed:get_child("channel");
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66 -- TODO channel properties
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67 for item in channel:childtags("item") do
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68 feed:tag("entry");
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69 for tag in item:childtags() do
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70 local translator = rss2atom[tag.name];
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71 if translator then
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72 translator(feed, tag);
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73 end
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74 end
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75 feed:reset();
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76 end
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77 return feed;
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78 end
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79
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80 return { translate_rss = translate_rss }