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mod_slack_webhooks/mod_slack_webhooks.lua @ 3257:f09d92579158
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author | Kim Alvefur <zash@zash.se> |
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date | Fri, 24 Aug 2018 16:16:30 +0200 |
parent | 3148:8c7b8b2c3237 |
child | 3443:284d8c18060e |
rev | line source |
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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 host_session = prosody.hosts[module.host]; |
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10 local msg = require "util.stanza".message; |
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11 local jid = require "util.jid"; |
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12 local now = require "util.datetime".datetime; |
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13 local json = require "util.json" |
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14 local formdecode = require "net.http".formdecode; |
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15 local http = require "net.http"; |
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16 local dataform = require "util.dataforms"; |
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17 |
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18 local function get_room_from_jid(mod_muc, room_jid) |
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19 if mod_muc.get_room_from_jid then |
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20 return mod_muc.get_room_from_jid(room_jid); |
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21 elseif mod_muc.rooms then |
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22 return mod_muc.rooms[room_jid]; -- COMPAT 0.9, 0.10 |
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23 end |
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24 end |
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25 |
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26 local button_ns = "xmpp:prosody.im/community/mod_slack_webhooks#buttons"; |
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27 local routing = module:get_option("outgoing_webhook_routing") or {}; |
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28 local listen_path = module:get_option("incoming_webhook_path") or "/webhook"; |
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29 local default_from_nick = module:get_option("incoming_webhook_default_nick") or "Bot"; |
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30 |
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31 function postcallback(_, code) |
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32 module:log("debug", "HTTP result %d", code) |
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33 end |
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34 |
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35 function check_message(data) |
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36 local stanza = data.stanza; |
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37 local mod_muc = host_session.muc; |
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38 if not mod_muc then return; end |
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39 |
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40 local this_room = get_room_from_jid(mod_muc, stanza.attr.to); |
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41 if not this_room then return; end -- no such room |
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42 |
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43 local from_room_jid = this_room._jid_nick[stanza.attr.from]; |
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44 if not from_room_jid then return; end -- no such nick |
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45 |
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46 local from_room, from_host, from_nick = jid.split(from_room_jid); |
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47 |
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48 local body = stanza:get_child("body"); |
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49 if not body then return; end -- No body, like topic changes |
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50 body = body and body:get_text(); -- I feel like I want to do `or ""` there :/ |
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51 |
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52 if not routing[from_room] then |
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53 return; |
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54 end |
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55 |
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56 local json_out = { |
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57 channel_name = from_room, |
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58 timestamp = now(), |
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59 text = body, |
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60 team_domain = from_host, |
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61 user_name = from_nick, |
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62 }; |
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63 |
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64 local form = stanza:get_child("x", "jabber:x:form"); |
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65 if form and form.attr.type == "submit" then |
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66 local callback_id, button_name, button_value; |
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67 for field in form:childtags("field") do |
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68 if field.attr.var == "callback_id" then |
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69 button_name = field:get_child_text("text"); |
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70 elseif field.attr.var == "button_name" then |
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71 button_name = field:get_child_text("text"); |
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72 elseif field.attr.var ~= "FORM_TYPE" or field:get_child_text("text") ~= button_ns then |
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73 callback_id, button_name, button_value = nil, nil, nil; |
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74 break; |
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75 end |
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76 end |
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77 if callback_id and button_name and button_value then |
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78 json_out.callback_id = callback_id; |
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79 json_out.actions = { |
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80 { type = "button", name = button_name, value = button_value } |
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81 }; |
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82 end |
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83 end |
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84 |
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85 local stanzaid = stanza:get_child("id"); |
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86 if stanzaid and string.sub(stanzaid,1,string.len("webhookbot"))=="webhookbot" then |
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87 json_out["bot_id"] = "webhookbot"; |
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88 end |
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89 |
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90 json_out = json.encode(json_out) |
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91 local url = routing[from_room]; |
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92 module:log("debug", "message from %s in %s to %s", from_nick, from_room, url); |
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93 if url == "DEBUG" then |
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94 module:log("debug", "json_out = %s", json_out); |
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95 return; |
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96 end |
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97 local headers = { |
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98 ["Content-Type"] = "application/json", |
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99 }; |
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100 http.request(url, { method = "POST", body = json_out, headers = headers }, postcallback) |
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101 end |
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102 |
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103 module:hook("message/bare", check_message, 10); |
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104 |
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105 local function route_post(f) |
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106 return function(event, path) |
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107 local bare_room = jid.join(path, module.host); |
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108 local mod_muc = host_session.muc; |
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109 if not get_room_from_jid(mod_muc, bare_room) then |
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110 module:log("warn", "mod_slack_webhook: invalid JID: %s", bare_room); |
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111 return 404; |
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112 end |
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113 -- Check secret? |
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114 return f(event, path) |
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115 end |
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116 end |
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117 |
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118 local function handle_post(event, path) |
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119 local mod_muc = host_session.muc; |
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120 local request = event.request; |
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121 local headers = request.headers; |
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122 |
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123 local body_type = headers.content_type; |
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124 local post_body; |
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125 if body_type == "application/x-www-form-urlencoded" then |
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126 post_body = formdecode(request.body); |
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127 elseif body_type == "application/json" then |
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128 post_body = json.decode(request.body) |
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129 if not post_body then |
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130 return 420; |
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131 end |
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132 else |
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133 return 422; |
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134 end |
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135 local bare_room = jid.join(path, module.host); |
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136 local dest_room = get_room_from_jid(mod_muc, bare_room); |
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137 local from_nick = default_from_nick; |
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138 if post_body["username"] then |
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139 from_nick = post_body["username"]; |
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140 end |
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141 local sender = jid.join(path, module.host, from_nick); |
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142 module:log("debug", "message to %s from %s", bare_room, sender); |
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143 module:log("debug", "body: %s", post_body["text"]); |
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144 local message = msg({ to = bare_room, from = sender, type = "groupchat", id="webhookbot" .. now()},post_body["text"]); |
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145 |
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146 if type(post_body["attachments"]) == "table" then -- Buttons? |
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147 -- luacheck: ignore 631 |
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148 -- defensive against JSON having whatever data in it, enjoy |
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149 |
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150 for _, attachment in ipairs(post_body["attachments"]) do |
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151 if type(attachment) == "table" and type(attachment.actions) == "table" and type(attachment.callback_id) == "string" then |
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152 local buttons = {}; |
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153 local button_name; |
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154 for _, action in ipairs(attachment.actions) do |
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155 if type(attachment.text) == "string" then |
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156 buttons.label = attachment.text; |
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157 end |
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158 if type(action) == "table" and action.type == "button" and type(action.name) == "string" and type(action.value) == "string" then |
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159 if not button_name then |
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160 button_name = action.name; |
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161 end |
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162 if button_name == action.name then |
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163 local button = { |
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164 value = action.value; |
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165 }; |
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166 if type(action.text) == "string" then |
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167 button.label = action.text; |
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168 end |
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169 table.insert(buttons, button); |
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170 end |
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171 end |
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172 end |
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173 if button_name then |
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174 message:add_direct_child(dataform.new({ |
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175 { |
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176 type = "hidden", name = "FORM_TYPE", |
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177 value = button_ns, |
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178 }, |
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179 { |
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180 type = "hidden", name = "callback_id", |
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181 value = attachment.callback_id, |
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182 }, |
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183 { |
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184 type = "hidden", name = "button_name", |
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185 value = button_name, |
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186 }, |
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187 { |
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188 type = "list-single", name = "buttons", |
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189 value = "", -- FIXME util.dataforms can't do options without a value |
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190 options = buttons; |
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191 } |
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192 }):form()); |
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193 break; |
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194 end |
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195 end |
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196 end |
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197 end |
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198 dest_room:broadcast_message(message, true); |
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199 return 201; |
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200 end |
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201 |
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202 module:provides("http", { |
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203 default_path = listen_path; |
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204 route = { |
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205 ["POST /*"] = route_post(handle_post); |
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206 OPTIONS = function(e) |
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207 local headers = e.response.headers; |
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208 headers.allow = "POST"; |
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209 headers.accept = "application/x-www-form-urlencoded, application/json"; |
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210 return 200; |
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211 end; |
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212 } |
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213 }); |
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214 |