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annotate mod_pubsub_post/mod_pubsub_post.lua @ 3015:338b7c808ecc

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mod_pubsub_post: Add support for posting Atom feeds, publishing each entry
author Kim Alvefur <zash@zash.se>
date Sun, 20 May 2018 00:04:41 +0200
parents 72dbc9b66de8
children 3f4e2340bfdc
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43c54a27bab2 mod_pubsub_post: Module to publish to pubsub nodes from a simple HTTP POST
Matthew Wild <mwild1@gmail.com>
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1 module:depends("http");
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2
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3 local st = require "util.stanza";
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4 local json = require "util.json";
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5 local xml = require "util.xml";
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6 local uuid_generate = require "util.uuid".generate;
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7 local timestamp_generate = require "util.datetime".datetime;
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8
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9 local pubsub_service = module:depends("pubsub").service;
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10
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11 local error_mapping = {
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12 ["forbidden"] = 403;
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13 ["item-not-found"] = 404;
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14 ["internal-server-error"] = 500;
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15 ["conflict"] = 409;
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16 };
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17
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18 local function publish_payload(node, item_id, payload)
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19 local post_item = st.stanza("item", { xmlns = "http://jabber.org/protocol/pubsub", id = item_id, })
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20 :add_child(payload);
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21 local ok, err = pubsub_service:publish(node, true, item_id, post_item);
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22 module:log("debug", ":publish(%q, true, %q, %s) -> %q", node, item_id, payload:top_tag(), err or "");
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23 if not ok then
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24 return error_mapping[err] or 500;
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25 end
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26 return 202;
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27 end
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28
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29 local function publish_atom(node, feed)
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30 for entry in feed:childtags("entry") do
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31 local item_id = entry:get_child_text("id");
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32 if not item_id then
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33 item_id = uuid_generate();
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34 entry:tag("id"):text(item_id):up();
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35 end
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36 if not entry:get_child_text("published") then
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37 entry:tag("published"):text(timestamp_generate()):up();
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38 end
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39 local resp = publish_payload(node, item_id, entry);
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40 if resp ~= 202 then return resp; end
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41 end
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42 return 202;
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43 end
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44
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45 local function handle_xml(node, payload)
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46 local xmlpayload, err = xml.parse(payload);
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47 if not xmlpayload then
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48 module:log("debug", "XML parse error: %s\n%q", err, payload);
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49 return { status_code = 400, body = tostring(err) };
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50 end
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51 if xmlpayload.attr.xmlns == "http://www.w3.org/2005/Atom" and xmlpayload.name == "feed" then
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52 return publish_atom(node, xmlpayload);
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53 else
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54 return publish_payload(node, "current", xmlpayload);
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55 end
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56 end
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57
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58 function handle_POST(event, path)
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59 local request = event.request;
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60 module:log("debug", "Handling POST: \n%s\n", tostring(request.body));
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61
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62 local content_type = request.headers.content_type or "application/octet-stream";
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63
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64 if content_type == "application/xml" or content_type:sub(-4) == "+xml" then
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65 return handle_xml(path, request.body);
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66 end
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67
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68 module:log("debug", "Unsupported content-type: %q", content_type);
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69 return 415;
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70 end
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71
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72 module:provides("http", {
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73 route = {
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74 ["POST /*"] = handle_POST;
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75 };
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76 });
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77
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78 function module.load()
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79 module:log("debug", "Loaded at %s", module:http_url());
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80 end