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mod_register_web/mod_register_web.lua @ 5883:259ffdbf8906
mod_anti_spam: New module for spam filtering (pre-alpha)
author | Matthew Wild <mwild1@gmail.com> |
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date | Tue, 05 Mar 2024 18:26:29 +0000 |
parent | 4440:95262bd1bcb2 |
rev | line source |
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1 local captcha_options = module:get_option("captcha_options", {}); |
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2 local nodeprep = require "util.encodings".stringprep.nodeprep; |
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3 local usermanager = require "core.usermanager"; |
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4 local datamanager = require "util.datamanager"; |
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5 local http = require "net.http"; |
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6 local path_sep = package.config:sub(1,1); |
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7 local json = require "util.json".decode; |
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8 local t_concat = table.concat; |
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9 |
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10 pcall(function () |
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11 module:depends("register_limits"); |
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12 end); |
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13 |
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14 module:depends"http"; |
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15 |
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16 local extra_fields = { |
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17 nick = true; name = true; first = true; last = true; email = true; |
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18 address = true; city = true; state = true; zip = true; |
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19 phone = true; url = true; date = true; |
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20 } |
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21 |
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22 local template_path = module:get_option_string("register_web_template", "templates"); |
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23 function template(data) |
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24 -- Like util.template, but deals with plain text |
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25 return { apply = function(values) return (data:gsub("{([^}]+)}", values)); end } |
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26 end |
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27 |
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28 local function get_template(name) |
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29 local fh = assert(module:load_resource(template_path..path_sep..name..".html")); |
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30 local data = assert(fh:read("*a")); |
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31 fh:close(); |
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32 return template(data); |
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33 end |
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34 |
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35 local function render(template, data) |
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36 return tostring(template.apply(data)); |
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37 end |
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38 |
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39 local register_tpl = get_template "register"; |
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40 local success_tpl = get_template "success"; |
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41 |
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42 -- COMPAT `or request.conn:ip()` |
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43 |
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44 if next(captcha_options) ~= nil then |
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45 local provider = captcha_options.provider; |
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46 if provider == nil or provider == "recaptcha" then |
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47 local recaptcha_tpl = get_template "recaptcha"; |
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48 |
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49 function generate_captcha(display_options) |
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50 return recaptcha_tpl.apply(setmetatable({ |
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51 recaptcha_display_error = display_options and display_options.recaptcha_error |
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52 and ("&error="..display_options.recaptcha_error) or ""; |
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53 }, { |
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54 __index = function (_, k) |
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55 if captcha_options[k] then return captcha_options[k]; end |
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56 module:log("error", "Missing parameter from captcha_options: %s", k); |
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57 end |
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58 })); |
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59 end |
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60 function verify_captcha(request, form, callback) |
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61 http.request("https://www.google.com/recaptcha/api/siteverify", { |
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62 body = http.formencode { |
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63 secret = captcha_options.recaptcha_private_key; |
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64 remoteip = request.ip or request.conn:ip(); |
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65 response = form["g-recaptcha-response"]; |
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66 }; |
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67 }, function (verify_result, code) |
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68 local result = json(verify_result); |
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69 if not result then |
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70 module:log("warn", "Unable to decode response from recaptcha: [%d] %s", code, verify_result); |
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71 callback(false, "Captcha API error"); |
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72 elseif result.success == true then |
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73 callback(true); |
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74 else |
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75 callback(false, t_concat(result["error-codes"])); |
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76 end |
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77 end); |
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78 end |
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79 elseif provider == "hcaptcha" then |
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80 local captcha_tpl = get_template "hcaptcha"; |
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81 |
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82 function generate_captcha(display_options) |
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83 return captcha_tpl.apply(setmetatable({ |
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84 captcha_display_error = display_options and display_options.captcha_error |
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85 and ("&error="..display_options.captcha_error) or ""; |
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86 }, { |
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87 __index = function (_, k) |
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88 if captcha_options[k] then return captcha_options[k]; end |
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89 module:log("error", "Missing parameter from captcha_options: %s", k); |
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90 end |
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91 })); |
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92 end |
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93 function verify_captcha(request, form, callback) |
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94 http.request("https://hcaptcha.com/siteverify", { |
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95 body = http.formencode { |
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96 secret = captcha_options.captcha_private_key; |
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97 remoteip = request.ip or request.conn:ip(); |
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98 response = form["h-captcha-response"]; |
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99 }; |
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100 }, function (verify_result, code) |
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101 local result = json(verify_result); |
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102 if not result then |
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103 module:log("warn", "Unable to decode response from hcaptcha: [%d] %s", code, verify_result); |
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104 callback(false, "Captcha API error"); |
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105 elseif result.success == true then |
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106 callback(true); |
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107 else |
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108 callback(false, t_concat(result["error-codes"])); |
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109 end |
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110 end); |
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111 end |
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112 end |
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113 else |
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114 module:log("debug", "No captcha options set, using fallback captcha") |
1231 | 115 local random = math.random; |
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116 local hmac_sha1 = require "util.hashes".hmac_sha1; |
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117 local secret = require "util.uuid".generate() |
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118 local ops = { '+', '-' }; |
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119 local captcha_tpl = get_template "simplecaptcha"; |
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120 function generate_captcha() |
1231 | 121 local op = ops[random(1, #ops)]; |
122 local x, y = random(1, 9) | |
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123 repeat |
1231 | 124 y = random(1, 9); |
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125 until x ~= y; |
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126 local answer; |
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127 if op == '+' then |
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128 answer = x + y; |
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129 elseif op == '-' then |
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130 if x < y then |
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131 -- Avoid negative numbers |
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132 x, y = y, x; |
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133 end |
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134 answer = x - y; |
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135 end |
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136 local challenge = hmac_sha1(secret, answer, true); |
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137 return captcha_tpl.apply { |
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138 op = op, x = x, y = y, challenge = challenge; |
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139 }; |
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140 end |
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141 function verify_captcha(request, form, callback) |
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142 if hmac_sha1(secret, form.captcha_reply or "", true) == form.captcha_challenge then |
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143 callback(true); |
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144 else |
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145 callback(false, "Captcha verification failed"); |
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146 end |
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147 end |
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148 end |
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149 |
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150 function generate_page(event, display_options) |
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151 local request, response = event.request, event.response; |
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152 |
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153 response.headers.content_type = "text/html; charset=utf-8"; |
1227
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154 return render(register_tpl, { |
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155 path = request.path; hostname = module.host; |
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156 notice = display_options and display_options.register_error or ""; |
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157 captcha = generate_captcha(display_options); |
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158 }) |
653
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159 end |
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160 |
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161 function register_user(form, origin) |
2924
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162 local username = form.username; |
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163 local password = form.password; |
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164 local confirm_password = form.confirm_password; |
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165 local jid = nil; |
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166 form.username, form.password, form.confirm_password = nil, nil, nil; |
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167 |
3725
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diff
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168 local prepped_username = nodeprep(username, true); |
1230
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169 if not prepped_username then |
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170 return nil, "Username contains forbidden characters"; |
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|
171 end |
1236
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1235
diff
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|
172 if #prepped_username == 0 then |
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173 return nil, "The username field was empty"; |
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|
174 end |
1229
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|
175 if usermanager.user_exists(prepped_username, module.host) then |
1230
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176 return nil, "Username already taken"; |
1229
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|
177 end |
3724
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Kim Alvefur <zash@zash.se>
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178 local registering = { username = prepped_username , host = module.host, additional = form, ip = origin.ip or origin.conn:ip(), allowed = true } |
1237
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179 module:fire_event("user-registering", registering); |
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180 if not registering.allowed then |
2923
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mod_register_web: Return reason for rejection if one was provided by another plugin during pre-registration checks
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2922
diff
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|
181 return nil, registering.reason or "Registration not allowed"; |
1237
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diff
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|
182 end |
2924
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|
183 if confirm_password ~= password then |
2733
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1778
diff
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|
184 return nil, "Passwords don't match"; |
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diff
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|
185 end |
2924
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2923
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|
186 local ok, err = usermanager.create_user(prepped_username, password, module.host); |
1232
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|
187 if ok then |
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diff
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|
188 jid = prepped_username.."@"..module.host |
1235
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diff
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|
189 local extra_data = {}; |
9277e0a3922f
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diff
changeset
|
190 for field in pairs(extra_fields) do |
9277e0a3922f
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diff
changeset
|
191 local field_value = form[field]; |
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diff
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|
192 if field_value and #field_value > 0 then |
9277e0a3922f
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diff
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|
193 extra_data[field] = field_value; |
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diff
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|
194 end |
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diff
changeset
|
195 end |
1238
752285859607
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1237
diff
changeset
|
196 if next(extra_data) ~= nil then |
1235
9277e0a3922f
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diff
changeset
|
197 datamanager.store(prepped_username, module.host, "account_details", extra_data); |
9277e0a3922f
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diff
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|
198 end |
1232
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1231
diff
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|
199 module:fire_event("user-registered", { |
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|
200 username = prepped_username, |
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|
201 host = module.host, |
1320
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|
202 source = module.name, |
3724
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3679
diff
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|
203 ip = origin.ip or origin.conn:ip(), |
1232
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|
204 }); |
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diff
changeset
|
205 end |
2929
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2925
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|
206 return jid, err; |
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diff
changeset
|
207 end |
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changeset
|
208 |
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|
209 function generate_success(event, jid) |
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|
210 return render(success_tpl, { jid = jid }); |
653
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diff
changeset
|
211 end |
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diff
changeset
|
212 |
2929
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2925
diff
changeset
|
213 function generate_register_response(event, jid, err) |
1618
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|
214 event.response.headers.content_type = "text/html; charset=utf-8"; |
2929
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diff
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|
215 if jid then |
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changeset
|
216 return generate_success(event, jid); |
653
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diff
changeset
|
217 else |
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diff
changeset
|
218 return generate_page(event, { register_error = err }); |
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changeset
|
219 end |
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changeset
|
220 end |
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changeset
|
221 |
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parents:
diff
changeset
|
222 function handle_form(event) |
c08b0e4b7b38
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parents:
diff
changeset
|
223 local request, response = event.request, event.response; |
c08b0e4b7b38
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parents:
diff
changeset
|
224 local form = http.formdecode(request.body); |
1234
da39ba4047a7
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Kim Alvefur <zash@zash.se>
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1233
diff
changeset
|
225 verify_captcha(request, form, function (ok, err) |
1226
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diff
changeset
|
226 if ok then |
2929
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2925
diff
changeset
|
227 local jid, register_err = register_user(form, request); |
3a104a900af1
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2925
diff
changeset
|
228 response:send(generate_register_response(event, jid, register_err)); |
653
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diff
changeset
|
229 else |
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1225
diff
changeset
|
230 response:send(generate_page(event, { register_error = err })); |
653
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231 end |
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232 end); |
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233 return true; -- Leave connection open until we respond above |
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234 end |
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235 |
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236 module:provides("http", { |
3753
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mod_register_web: Set a (configurable) HTTP app title
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237 title = module:get_option_string("register_web_title", "Account Registration"); |
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238 route = { |
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239 GET = generate_page; |
1239
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mod_register_web: Handle URLs with a trailing slash
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240 ["GET /"] = generate_page; |
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241 POST = handle_form; |
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242 ["POST /"] = handle_form; |
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243 }; |
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244 }); |