annotate mod_pubsub_post/mod_pubsub_post.lua @ 4300:3f3b672b7616

mod_vcard_muc: Pass room object around instead of JID, hopefully fixing traceback More efficient to pass the object around instead of using the JID and looking up the object when needed. It seems in some (undetermined) cases get_room_from_jid(room.jid) is nil.
author Matthew Wild <mwild1@gmail.com>
date Tue, 15 Dec 2020 10:49:11 +0000
parents 0d3926e49b55
children f7381268a597
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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 local hashes = require "util.hashes";
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9 local from_hex = require "util.hex".from;
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10 local hmacs = {
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11 sha1 = hashes.hmac_sha1;
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12 sha256 = hashes.hmac_sha256;
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13 sha384 = hashes.hmac_sha384;
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14 sha512 = hashes.hmac_sha512;
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15 };
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16
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17 local pubsub_service = module:depends("pubsub").service;
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18
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19 local error_mapping = {
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20 ["forbidden"] = 403;
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21 ["item-not-found"] = 404;
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22 ["internal-server-error"] = 500;
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23 ["conflict"] = 409;
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24 };
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25
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26 local function publish_payload(node, actor, item_id, payload)
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27 local post_item = st.stanza("item", { xmlns = "http://jabber.org/protocol/pubsub", id = item_id, })
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28 :add_child(payload);
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29 local ok, err = pubsub_service:publish(node, actor, item_id, post_item);
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30 module:log("debug", ":publish(%q, true, %q, %s) -> %q", node, item_id, payload:top_tag(), err or "");
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31 if not ok then
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32 return error_mapping[err] or 500;
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33 end
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34 return 202;
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35 end
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36
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37 local function handle_json(node, actor, data)
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38 local parsed, err = json.decode(data);
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39 if not parsed then
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40 return { status_code = 400; body = tostring(err); }
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41 end
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42 if type(parsed) ~= "table" then
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43 return { status_code = 400; body = "object or array expected"; };
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44 end
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45 local wrapper = st.stanza("json", { xmlns="urn:xmpp:json:0" }):text(data);
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46 return publish_payload(node, actor, type(parsed.id) == "string" and parsed.id or "current", wrapper);
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47 end
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48
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49 local function publish_atom(node, actor, feed)
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50 for entry in feed:childtags("entry") do
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51 local item_id = entry:get_child_text("id");
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52 if not item_id then
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53 item_id = uuid_generate();
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54 entry:tag("id"):text(item_id):up();
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55 end
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56 if not entry:get_child_text("published") then
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57 entry:tag("published"):text(timestamp_generate()):up();
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58 end
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59 local resp = publish_payload(node, actor, item_id, entry);
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60 if resp ~= 202 then return resp; end
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61 end
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62 return 202;
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63 end
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64
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65 local function handle_xml(node, actor, payload)
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66 local xmlpayload, err = xml.parse(payload);
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67 if not xmlpayload then
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68 module:log("debug", "XML parse error: %s\n%q", err, payload);
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69 return { status_code = 400, body = tostring(err) };
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70 end
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71 if xmlpayload.attr.xmlns == "http://www.w3.org/2005/Atom" and xmlpayload.name == "feed" then
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72 return publish_atom(node, actor, xmlpayload);
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73 else
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74 return publish_payload(node, actor, "current", xmlpayload);
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75 end
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76 end
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77
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78 local actor_source = module:get_option_string("pubsub_post_actor"); -- COMPAT
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79 local default_secret = module:get_option_string("pubsub_post_default_secret");
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80 local actor_secrets = module:get_option("pubsub_post_secrets");
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81 local actors = module:get_option("pubsub_post_actors");
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82 local default_actor = module:get_option_string("pubsub_post_default_actor");
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83 if not default_actor and actor_source == "superuser" then
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84 default_actor = true;
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85 end
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86
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87 local function verify_signature(secret, body, signature)
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88 if not signature then return false; end
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89 local algo, digest = signature:match("^([^=]+)=(%x+)");
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90 if not algo then return false; end
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91 local hmac = hmacs[algo];
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92 if not algo then return false; end
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93 return hmac(secret, body) == from_hex(digest);
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94 end
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95
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96 function handle_POST(event, path)
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97 local request = event.request;
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98
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99 local content_type = request.headers.content_type or "application/octet-stream";
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100 local actor = actors and actors[path] or default_actor or request.ip;
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101 local secret = actor_secrets and actor_secrets[path] or default_secret;
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102
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103 module:log("debug", "Handling POST to node %q by %q with %q: \n%s\n", path, actor, content_type, request.body);
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104
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105 if secret and not verify_signature(secret, request.body, request.headers.x_hub_signature) then
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106 module:log("debug", "Signature validation failed");
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107 return 401;
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108 end
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109
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110 if not actor then
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111 return 401;
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112 end
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113
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114 if content_type == "application/xml" or content_type:sub(-4) == "+xml" then
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115 return handle_xml(path, actor, request.body);
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116 elseif content_type == "application/json" or content_type:sub(-5) == "+json" then
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117 return handle_json(path, actor, request.body);
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118 end
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119
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120 module:log("debug", "Unsupported content-type: %q", content_type);
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121 return 415;
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122 end
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123
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124 module:provides("http", {
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125 route = {
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126 ["POST /*"] = handle_POST;
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127 };
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128 });
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129
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130 function module.load()
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131 module:log("debug", "Loaded at %s", module:http_url());
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132 end