Mercurial > prosody-modules

annotate mod_invite/mod_invite.lua @ 2058:4b3037c7af62

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mod_invite: Allows existing users to generate URLs that can be used to invite new users. Mutual presence subscriptions are automatically created when the creation succeeds.
author Thijs Alkemade <me@thijsalkema.de>
date Wed, 02 Mar 2016 18:12:34 +0100
parents
children dc4e77824318
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2058
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1 local adhoc_new = module:require "adhoc".new;
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2 local uuid_new = require "util.uuid".generate;
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3 local jid_split = require "util.jid".split;
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4 local jid_join = require "util.jid".join;
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5 local http_formdecode = require "net.http".formdecode;
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6 local http_urlencode = require "net.http".urlencode;
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7 local usermanager = require "core.usermanager";
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8 local rostermanager = require "core.rostermanager";
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9 local nodeprep = require "util.encodings".stringprep.nodeprep;
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10 local tostring = tostring;
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11
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12 local invite_storage = module:open_store();
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13 local inviter_storage = module:open_store("inviter");
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14
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15 local serve = module:depends"http_files".serve;
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16
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17 module:depends"http";
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18
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19 local entities = {
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20 ["<"] = "&lt;", [">"] = "&gt;", ["&"] = "&amp;",
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21 ["'"] = "&apos;", ["\""] = "&quot;", ["\n"] = "<br/>",
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22 };
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23
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24 local function tohtml(plain)
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25 return (plain:gsub("[<>&'\"\n]", entities));
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26 end
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27
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28 local function apply_template(template, args)
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29 return
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30 template:gsub("{{([^}]*)}}", function (k)
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31 if args[k] then
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32 return tohtml(args[k])
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33 else
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34 return k
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35 end
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36 end)
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37 end
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38
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39 function generate_page(event, display_options)
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40 local request, response = event.request, event.response;
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41
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42 local tokens = invite_storage:get() or {};
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43
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44 local token = request.path:match("^/invite/([^/]*)$");
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45
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46 response.headers.content_type = "text/html; charset=utf-8";
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47
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48 if not token or not tokens[token] then
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49 local template = assert(module:load_resource("invite/invite_result.html")):read("*a");
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50
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51 return apply_template(template, { classes = "alert-danger", message = "This invite has expired." })
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52 end
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53
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54 local template = assert(module:load_resource("invite/invite.html")):read("*a");
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55
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56 return apply_template(template, { user = jid_join(tokens[token], module.host), server = module.host, token = token });
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57 end
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58
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59 function subscribe(user1, user2)
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60 local user1_jid = jid_join(user1, module.host);
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61 local user2_jid = jid_join(user2, module.host);
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62
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63 rostermanager.set_contact_pending_out(user2, module.host, user1_jid);
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64 rostermanager.set_contact_pending_in(user1, module.host, user2_jid);
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65 rostermanager.subscribed(user1, module.host, user2_jid);
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66 rostermanager.process_inbound_subscription_approval(user2, module.host, user1_jid);
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67 end
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68
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69 function handle_form(event, display_options)
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70 local request, response = event.request, event.response;
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71 local form_data = http_formdecode(request.body);
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72 local user, password, token = form_data["user"], form_data["password"], form_data["token"];
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73 local tokens = invite_storage:get() or {};
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74
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75 local template = assert(module:load_resource("invite/invite_result.html")):read("*a");
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76
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77 response.headers.content_type = "text/html; charset=utf-8";
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78
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79 if not user or #user == 0 or not password or #password == 0 or not token then
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80 return apply_template(template, { classes = "alert-warning", message = "Please fill in all fields." })
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81 end
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82
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83 if not tokens[token] then
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84 return apply_template(template, { classes = "alert-danger", message = "This invite has expired." })
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85 end
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86
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87 -- Shamelessly copied from mod_register_web.
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88 local prepped_username = nodeprep(user);
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89
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90 if not prepped_username or #prepped_username == 0 then
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91 return apply_template(template, { classes = "alert-warning", message = "This username contains invalid characters." })
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92 end
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93
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94 if usermanager.user_exists(prepped_username, module.host) then
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95 return apply_template(template, { classes = "alert-warning", message = "This username is already in use." })
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96 end
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97
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98 local registering = { username = prepped_username , host = module.host, allowed = true }
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99
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100 module:fire_event("user-registering", registering);
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101
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102 if not registering.allowed then
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103 return apply_template(template, { classes = "alert-danger", message = "Registration is not allowed." })
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104 end
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105
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106 local ok, err = usermanager.create_user(prepped_username, password, module.host);
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107
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108 if ok then
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109 subscribe(prepped_username, tokens[token]);
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110 subscribe(tokens[token], prepped_username);
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111
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112 inviter_storage:set(prepped_username, { inviter = tokens[token] });
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113
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114 rostermanager.roster_push(tokens[token], module.host, jid_join(prepped_username, module.host));
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115
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116 tokens[token] = nil;
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117
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118 invite_storage:set(nil, tokens);
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119
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120 return apply_template(template, { classes = "alert-success", message = "Your account has been created! You can now log in using an XMPP client." })
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121 else
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122 module:log("debug", "Registration failed: " .. tostring(err));
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123
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124 return apply_template(template, { classes = "alert-danger", message = "An unknown error has occurred." })
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125 end
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126 end
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127
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128 module:provides("http", {
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129 route = {
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130 ["GET /a_file.txt"] = serve(module:get_directory().."/my_file.txt");
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131 ["GET /bootstrap.min.css"] = serve(module:get_directory());
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132 ["GET /*"] = generate_page;
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133 POST = handle_form;
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134 };
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135 });
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136
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137 function invite_command_handler(self, data, state)
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138 local uuid = uuid_new();
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139
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140 local user, host = jid_split(data.from);
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141
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142 if host ~= module.host then
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143 return { status = "completed", error = { message = "You are not allowed to invite users to this server." }};
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144 end
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145
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146 local tokens = invite_storage:get() or {};
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147
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148 tokens[uuid] = user;
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149
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150 invite_storage:set(nil, tokens);
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151
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152 return { info = module:http_url() .. "/" .. uuid, status = "completed" };
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153 end
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154
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155 local adhoc_invite = adhoc_new("Invite user", "invite", invite_command_handler, "user")
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156
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157 module:add_item("adhoc", adhoc_invite);