annotate mod_pubsub_feeds/feeds.lib.lua @ 5018:ed2a9a4c4f01

mod_sasl2: Return status from event handlers Without this, clients would get "unsupported-stanza-type" even on successfully handled responses.
author Matthew Wild <mwild1@gmail.com>
date Sun, 28 Aug 2022 11:11:50 +0100
parents b328ca621ba6
children
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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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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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14
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15 function rss2atom.enclosure(atom_entry, tag)
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16 atom_entry:tag("link", { rel = "enclosure", href = tag.attr.url, type = tag.attr.type, length = tag.attr.length }):up();
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17 end
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19 function rss2atom.author(atom_entry, tag)
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20 atom_entry:tag("author")
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21 :tag("email"):text(tag:get_text()):up()
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22 :up();
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23 end
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25 function rss2atom.guid(atom_entry, tag)
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26 atom_entry:tag("id"):text(tag:get_text()):up();
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27 end
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29 function rss2atom.category(atom_entry, tag)
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30 atom_entry:tag("category", { term = tag:get_text(), scheme = tag.attr.domain }):up();
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31 end
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33 function rss2atom.description(atom_entry, tag)
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34 atom_entry:tag("summary"):text(tag:get_text()):up();
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35 end
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37 local months = {
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38 jan = "01", feb = "02", mar = "03", apr = "04", may = "05", jun = "06";
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39 jul = "07", aug = "08", sep = "09", oct = "10", nov = "11", dec = "12";
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40 };
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42 function rss2atom.pubDate(atom_entry, tag)
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43 local pubdate = tag:get_text():gsub("^%a+,", ""):gsub("^%s*", "");
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44 local date, month, year, hour, minute, second, zone =
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45 pubdate:match("^(%d%d?) (%a+) (%d+) (%d+):(%d+):?(%d*) ?(.*)$");
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46 if not date then return; end
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47 if #date == 1 then
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48 date = "0"..date;
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49 end
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50 month = months[month:sub(1,3):lower()];
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51 if #year == 2 then -- GAH!
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52 if tonumber(year) > 80 then
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53 year = "19"..year;
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54 else
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55 year = "20"..year;
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56 end
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57 end
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58 if zone == "UT" or zone == "GMT" then zone = "Z"; end
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59 if #second == 0 then
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60 second = "00";
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61 end
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62 local date_string = string.format("%s-%s-%sT%s:%s:%s%s", year, month, date, hour, minute, second, zone);
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63 atom_entry:tag("published"):text(date_string):up();
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64 end
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65
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66 -- Translate a single item to atom
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67 local function translate_rss(rss_feed)
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68 local feed = st.stanza("feed", { xmlns = "http://www.w3.org/2005/Atom" });
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69 local channel = rss_feed:get_child("channel");
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70 -- TODO channel properties
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71 for item in channel:childtags("item") do
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72 feed:tag("entry");
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73 for tag in item:childtags() do
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74 local translator = rss2atom[tag.name];
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75 if translator then
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76 translator(feed, tag);
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77 end
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78 end
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79 -- Preserve Atom-namespaced items
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80 for atomtag in item:childtags(nil, "http://www.w3.org/2005/Atom") do
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81 feed:add_child(st.clone(atomtag));
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82 end
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83 feed:reset();
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84 end
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85 return feed;
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86 end
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87
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88 return { translate_rss = translate_rss }