prosody-modules
0f5657db1cfc
mod_pubsub_feeds/feeds.lib.lua

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mod_pubsub_feeds/feeds.lib.lua @ 5296:0f5657db1cfc

mod_isolate_host: handle server-generated stanzas The hook for setting the no_host_isolation is only called for c2s sessions. This does not work for stanzas generated by the server, such as PEP notifications or presence probe answers. To handle that, we do per-stanza checks for the case that the origin is local.
author Jonas Schäfer <jonas@wielicki.name>
date Sat, 01 Apr 2023 12:03:08 +0200
parent 4428:b328ca621ba6
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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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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 }