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annotate mod_pubsub_github/mod_pubsub_github.lua @ 3517:ea1edd7cfb01

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mod_pubsub_github: Add support for publishing to multiple node based on repository
author Kim Alvefur <zash@zash.se>
date Sun, 31 Mar 2019 18:10:12 +0200
parents d94875c3ddda
children 95c1c3e057cf
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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 hmac_sha1 = require "util.hashes".hmac_sha1;
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7 local pubsub_service = module:depends("pubsub").service;
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8 local default_node = module:get_option("github_node", "github");
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9 local node_prefix = module:get_option_string("github_node_prefix", "github/");
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10 local node_mapping = module:get_option_string("github_node_mapping");
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11 local github_actor = module:get_option_string("github_actor") or true;
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12 local secret = module:get_option("github_secret");
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13
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14 assert(secret, "Please set 'github_secret'");
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15
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16 local error_mapping = {
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17 ["forbidden"] = 403;
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18 ["item-not-found"] = 404;
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19 ["internal-server-error"] = 500;
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20 ["conflict"] = 409;
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21 };
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22
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23 function handle_POST(event)
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24 local request, response = event.request, event.response;
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25 if ("sha1=" .. hmac_sha1(secret, request.body, true)) ~= request.headers.x_hub_signature then
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26 return 401;
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27 end
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28 local data = json.decode(request.body);
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29 if not data then
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30 response.status_code = 400;
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31 return "Invalid JSON. From you of all people...";
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32 end
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33
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34 local github_event = request.headers.x_github_event
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35 if github_event == "push" then
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36 module:log("debug", "Handling 'push' event: \n%s\n", tostring(request.body));
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37 elseif github_event then
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38 module:log("debug", "Unsupported Github event %q", github_event);
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39 return 501;
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40 end -- else .. is this even github?
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41
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42 local node = default_node;
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43 if node_mapping then
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44 node = node_prefix .. data.repository[node_mapping];
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45 end
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46
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47 for _, commit in ipairs(data.commits) do
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48 local ok, err = pubsub_service:publish(node, github_actor, commit.id,
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49 st.stanza("item", { id = commit.id, xmlns = "http://jabber.org/protocol/pubsub" })
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50 :tag("entry", { xmlns = "http://www.w3.org/2005/Atom" })
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51 :tag("id"):text(commit.id):up()
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52 :tag("title"):text(commit.message):up()
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53 :tag("link", { rel = "alternate", href = commit.url }):up()
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54 :tag("published"):text(commit.timestamp):up()
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55 :tag("author")
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56 :tag("name"):text(commit.author.name):up()
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57 :tag("email"):text(commit.author.email):up()
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58 :up()
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59 );
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60 if not ok then
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61 return error_mapping[err] or 500;
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62 end
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63 end
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64
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65 response.status_code = 202;
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66 return "Thank you Github!";
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67 end
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68
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69 module:provides("http", {
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70 route = {
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71 POST = handle_POST;
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72 };
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73 });
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74
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75 if not node_mapping then
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76 function module.load()
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77 if not pubsub_service.nodes[default_node] then
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78 local ok, err = pubsub_service:create(default_node, true);
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79 if not ok then
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80 module:log("error", "Error creating node: %s", err);
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81 else
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82 module:log("debug", "Node %q created", default_node);
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83 end
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84 end
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85 end
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86 end