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annotate mod_pubsub_github/mod_pubsub_github.lua @ 3503:882180b459a0

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mod_pubsub_post: Restructure authentication and authorization (BC) This deprecates the default "superuser" actor model and makes the default equivalent to the previous "request.id". A single actor and secret per node is supported because HTTP and WebHooks don't normally include any authorization identity. Allowing authentication bypass when no secret is given should be relatively safe when the actor is unprivileged, as will be unless explicitly configured otherwise.
author Kim Alvefur <zash@zash.se>
date Sat, 30 Mar 2019 21:16:13 +0100
parents d4207ab8ccc1
children a98a3922bc01
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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 node = module:get_option("github_node", "github");
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9 local secret = module:get_option("github_secret");
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11 function handle_POST(event)
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12 local request = event.request;
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13 if secret and ("sha1=" .. hmac_sha1(secret, request.body, true)) ~= request.headers.x_hub_signature then
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14 return 401;
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15 end
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16 local data = json.decode(request.body);
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17 if not data then
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18 return "Invalid JSON. From you of all people...";
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19 end
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21 for _, commit in ipairs(data.commits) do
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22 local ok, err = pubsub_service:publish(node, true, data.repository.name,
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23 st.stanza("item", { id = data.repository.name, xmlns = "http://jabber.org/protocol/pubsub" })
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24 :tag("entry", { xmlns = "http://www.w3.org/2005/Atom" })
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25 :tag("id"):text(commit.id):up()
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26 :tag("title"):text(commit.message):up()
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27 :tag("link", { rel = "alternate", href = commit.url }):up()
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28 :tag("published"):text(commit.timestamp):up()
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29 :tag("author")
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30 :tag("name"):text(commit.author.name):up()
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31 :tag("email"):text(commit.author.email):up()
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32 :up()
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33 );
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34 end
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35
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36 module:log("debug", "Handled POST: \n%s\n", tostring(request.body));
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37 return "Thank you Github!";
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38 end
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40 module:provides("http", {
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41 route = {
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42 POST = handle_POST;
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43 };
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44 });
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46 function module.load()
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47 if not pubsub_service.nodes[node] then
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48 local ok, err = pubsub_service:create(node, true);
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49 if not ok then
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50 module:log("error", "Error creating node: %s", err);
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51 else
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52 module:log("debug", "Node %q created", node);
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53 end
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54 end
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55 end