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annotate mod_pubsub_github/mod_pubsub_github.lua @ 3513:9556e92b2ec4

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mod_pubsub_github: Abort on unknown github events
author Kim Alvefur <zash@zash.se>
date Sun, 31 Mar 2019 17:47:45 +0200
parents f09423c29f31
children 8811b7dbe6e2
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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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6
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7 local pubsub_service = module:depends("pubsub").service;
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8 local node = module:get_option("github_node", "github");
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9 local secret = module:get_option("github_secret");
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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 function handle_POST(event)
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19 local request, response = event.request, event.response;
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20 if secret and ("sha1=" .. hmac_sha1(secret, request.body, true)) ~= request.headers.x_hub_signature then
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21 return 401;
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22 end
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23 local data = json.decode(request.body);
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24 if not data then
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25 response.status_code = 400;
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26 return "Invalid JSON. From you of all people...";
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27 end
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29 local github_event = request.headers.x_github_event
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30 if github_event == "push" then
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31 module:log("debug", "Handling 'push' event: \n%s\n", tostring(request.body));
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32 elseif github_event then
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33 module:log("debug", "Unsupported Github event %q", github_event);
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34 return 501;
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35 end -- else .. is this even github?
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36
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37 for _, commit in ipairs(data.commits) do
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38 local ok, err = pubsub_service:publish(node, true, data.repository.name,
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39 st.stanza("item", { id = data.repository.name, xmlns = "http://jabber.org/protocol/pubsub" })
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40 :tag("entry", { xmlns = "http://www.w3.org/2005/Atom" })
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41 :tag("id"):text(commit.id):up()
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42 :tag("title"):text(commit.message):up()
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43 :tag("link", { rel = "alternate", href = commit.url }):up()
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44 :tag("published"):text(commit.timestamp):up()
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45 :tag("author")
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46 :tag("name"):text(commit.author.name):up()
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47 :tag("email"):text(commit.author.email):up()
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48 :up()
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49 );
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50 if not ok then
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51 return error_mapping[err] or 500;
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52 end
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53 end
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54
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55 response.status_code = 202;
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56 return "Thank you Github!";
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57 end
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58
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59 module:provides("http", {
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60 route = {
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61 POST = handle_POST;
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62 };
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63 });
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64
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65 function module.load()
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66 if not pubsub_service.nodes[node] then
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67 local ok, err = pubsub_service:create(node, true);
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68 if not ok then
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69 module:log("error", "Error creating node: %s", err);
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70 else
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71 module:log("debug", "Node %q created", node);
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72 end
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73 end
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74 end