prosody-modules
94805a7e7b30
mod_slack_webhooks/mod_slack_webhooks.lua

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mod_slack_webhooks/mod_slack_webhooks.lua @ 4421:94805a7e7b30

mod_invites: rework CLI parsing to support groups To make this sensible, the code had to move from rather simple parsing to something which looks more like getopt or your typical shell script.
author Jonas Schäfer <jonas@wielicki.name>
date Sun, 31 Jan 2021 19:16:36 +0100
parent 3443:284d8c18060e
child 4560:724003f24308
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 -- Allow Slack-style incoming and outgoing hooks to MUC rooms
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2 -- Based on mod_muc_intercom and mod_post_msg
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3 -- Copyright 2016-2017 Nathan Whitehorn <nwhitehorn@physics.ucla.edu>
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4 --
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5 -- This file is MIT/X11 licensed.
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6
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7 module:depends"http"
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8
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9 local msg = require "util.stanza".message;
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10 local jid = require "util.jid";
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11 local now = require "util.datetime".datetime;
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12 local json = require "util.json"
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13 local formdecode = require "net.http".formdecode;
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14 local http = require "net.http";
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15 local dataform = require "util.dataforms";
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16
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17 local mod_muc = module:depends"muc";
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18 local rooms = rawget(mod_muc, "rooms");
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19 local get_room_from_jid = rawget(mod_muc, "get_room_from_jid") or
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20 function (room_jid)
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21 return rooms[room_jid];
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22 end
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23
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24 local button_ns = "xmpp:prosody.im/community/mod_slack_webhooks#buttons";
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25 local routing = module:get_option("outgoing_webhook_routing") or {};
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26 local listen_path = module:get_option("incoming_webhook_path") or "/webhook";
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27 local default_from_nick = module:get_option("incoming_webhook_default_nick") or "Bot";
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28
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29 function postcallback(_, code)
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30 module:log("debug", "HTTP result %d", code)
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31 end
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32
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33 function check_message(data)
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34 local stanza = data.stanza;
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36 local this_room = get_room_from_jid(stanza.attr.to);
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37 if not this_room then return; end -- no such room
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38
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39 local from_room_jid = this_room._jid_nick[stanza.attr.from];
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40 if not from_room_jid then return; end -- no such nick
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41
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42 local from_room, from_host, from_nick = jid.split(from_room_jid);
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43
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44 local body = stanza:get_child("body");
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45 if not body then return; end -- No body, like topic changes
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46 body = body and body:get_text(); -- I feel like I want to do `or ""` there :/
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47
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48 if not routing[from_room] then
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49 return;
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50 end
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51
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52 local json_out = {
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53 channel_name = from_room,
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54 timestamp = now(),
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55 text = body,
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56 team_domain = from_host,
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57 user_name = from_nick,
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58 };
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59
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60 local form = stanza:get_child("x", "jabber:x:form");
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61 if form and form.attr.type == "submit" then
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62 local callback_id, button_name, button_value;
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63 for field in form:childtags("field") do
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64 if field.attr.var == "callback_id" then
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65 button_name = field:get_child_text("text");
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66 elseif field.attr.var == "button_name" then
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67 button_name = field:get_child_text("text");
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68 elseif field.attr.var ~= "FORM_TYPE" or field:get_child_text("text") ~= button_ns then
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69 callback_id, button_name, button_value = nil, nil, nil;
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70 break;
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71 end
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72 end
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73 if callback_id and button_name and button_value then
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74 json_out.callback_id = callback_id;
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75 json_out.actions = {
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76 { type = "button", name = button_name, value = button_value }
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77 };
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78 end
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79 end
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80
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81 local stanzaid = stanza:get_child("id");
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82 if stanzaid and string.sub(stanzaid,1,string.len("webhookbot"))=="webhookbot" then
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83 json_out["bot_id"] = "webhookbot";
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84 end
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85
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86 json_out = json.encode(json_out)
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87 local url = routing[from_room];
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88 module:log("debug", "message from %s in %s to %s", from_nick, from_room, url);
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89 if url == "DEBUG" then
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90 module:log("debug", "json_out = %s", json_out);
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91 return;
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92 end
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93 local headers = {
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94 ["Content-Type"] = "application/json",
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95 };
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96 http.request(url, { method = "POST", body = json_out, headers = headers }, postcallback)
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97 end
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98
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99 module:hook("message/bare", check_message, 10);
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100
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101 local function route_post(f)
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102 return function(event, path)
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103 local bare_room = jid.join(path, module.host);
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104 if not get_room_from_jid(bare_room) then
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105 module:log("warn", "mod_slack_webhook: invalid JID: %s", bare_room);
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106 return 404;
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107 end
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108 -- Check secret?
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109 return f(event, path)
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110 end
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111 end
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112
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113 local function handle_post(event, path)
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114 local request = event.request;
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115 local headers = request.headers;
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116
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117 local body_type = headers.content_type;
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118 local post_body;
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119 if body_type == "application/x-www-form-urlencoded" then
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120 post_body = formdecode(request.body);
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121 elseif body_type == "application/json" then
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122 post_body = json.decode(request.body)
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123 if not post_body then
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124 return 420;
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125 end
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126 else
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127 return 422;
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128 end
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129 local bare_room = jid.join(path, module.host);
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130 local dest_room = get_room_from_jid(bare_room);
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131 local from_nick = default_from_nick;
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132 if post_body["username"] then
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133 from_nick = post_body["username"];
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134 end
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135 local sender = jid.join(path, module.host, from_nick);
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136 module:log("debug", "message to %s from %s", bare_room, sender);
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137 module:log("debug", "body: %s", post_body["text"]);
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138 local message = msg({ to = bare_room, from = sender, type = "groupchat", id="webhookbot" .. now()},post_body["text"]);
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139
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140 if type(post_body["attachments"]) == "table" then -- Buttons?
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141 -- luacheck: ignore 631
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142 -- defensive against JSON having whatever data in it, enjoy
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143
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144 for _, attachment in ipairs(post_body["attachments"]) do
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145 if type(attachment) == "table" and type(attachment.actions) == "table" and type(attachment.callback_id) == "string" then
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146 local buttons = {};
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147 local button_name;
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148 for _, action in ipairs(attachment.actions) do
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149 if type(attachment.text) == "string" then
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150 buttons.label = attachment.text;
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151 end
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152 if type(action) == "table" and action.type == "button" and type(action.name) == "string" and type(action.value) == "string" then
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153 if not button_name then
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154 button_name = action.name;
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155 end
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156 if button_name == action.name then
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157 local button = {
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158 value = action.value;
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159 };
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160 if type(action.text) == "string" then
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161 button.label = action.text;
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162 end
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163 table.insert(buttons, button);
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164 end
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165 end
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166 end
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167 if button_name then
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168 message:add_direct_child(dataform.new({
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169 {
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170 type = "hidden", name = "FORM_TYPE",
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171 value = button_ns,
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172 },
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173 {
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174 type = "hidden", name = "callback_id",
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175 value = attachment.callback_id,
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176 },
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177 {
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178 type = "hidden", name = "button_name",
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179 value = button_name,
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180 },
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181 {
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182 type = "list-single", name = "buttons",
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183 value = "", -- FIXME util.dataforms can't do options without a value
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184 options = buttons;
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185 }
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186 }):form());
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187 break;
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diff changeset
188 end
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diff changeset
189 end
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diff changeset
190 end
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parents: 3097
diff changeset
191 end
3000
02fc3b64cbb7 Initial commit of mod_slack_webhooks.
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parents:
diff changeset
192 dest_room:broadcast_message(message, true);
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parents:
diff changeset
193 return 201;
02fc3b64cbb7 Initial commit of mod_slack_webhooks.
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parents:
diff changeset
194 end
02fc3b64cbb7 Initial commit of mod_slack_webhooks.
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parents:
diff changeset
195
02fc3b64cbb7 Initial commit of mod_slack_webhooks.
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parents:
diff changeset
196 module:provides("http", {
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parents:
diff changeset
197 default_path = listen_path;
02fc3b64cbb7 Initial commit of mod_slack_webhooks.
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parents:
diff changeset
198 route = {
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parents:
diff changeset
199 ["POST /*"] = route_post(handle_post);
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parents:
diff changeset
200 OPTIONS = function(e)
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parents:
diff changeset
201 local headers = e.response.headers;
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parents:
diff changeset
202 headers.allow = "POST";
02fc3b64cbb7 Initial commit of mod_slack_webhooks.
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parents:
diff changeset
203 headers.accept = "application/x-www-form-urlencoded, application/json";
02fc3b64cbb7 Initial commit of mod_slack_webhooks.
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parents:
diff changeset
204 return 200;
02fc3b64cbb7 Initial commit of mod_slack_webhooks.
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parents:
diff changeset
205 end;
02fc3b64cbb7 Initial commit of mod_slack_webhooks.
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parents:
diff changeset
206 }
02fc3b64cbb7 Initial commit of mod_slack_webhooks.
Nathan Whitehorn <nwhitehorn@physics.ucla.edu>
parents:
diff changeset
207 });
02fc3b64cbb7 Initial commit of mod_slack_webhooks.
Nathan Whitehorn <nwhitehorn@physics.ucla.edu>
parents:
diff changeset
208