Mercurial > prosody-modules
annotate mod_register_web/mod_register_web.lua @ 3530:552d4944d1ca
mod_pubsub_github: Rearrange code to make it easier to handle other event types
author | Kim Alvefur <zash@zash.se> |
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date | Sun, 31 Mar 2019 19:08:43 +0200 |
parents | 866167118d23 |
children | f9a93d7b6c50 |
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mod_register_web: Extremely rough web registration page, with captcha
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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 if next(captcha_options) ~= nil then |
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43 local recaptcha_tpl = get_template "recaptcha"; |
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44 |
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45 function generate_captcha(display_options) |
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46 return recaptcha_tpl.apply(setmetatable({ |
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47 recaptcha_display_error = display_options and display_options.recaptcha_error |
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48 and ("&error="..display_options.recaptcha_error) or ""; |
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49 }, { |
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50 __index = function (_, k) |
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51 if captcha_options[k] then return captcha_options[k]; end |
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52 module:log("error", "Missing parameter from captcha_options: %s", k); |
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53 end |
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54 })); |
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55 end |
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56 function verify_captcha(request, form, callback) |
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57 http.request("https://www.google.com/recaptcha/api/siteverify", { |
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58 body = http.formencode { |
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59 secret = captcha_options.recaptcha_private_key; |
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60 remoteip = request.conn:ip(); |
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61 response = form["g-recaptcha-response"]; |
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62 }; |
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63 }, function (verify_result, code) |
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64 local result = json(verify_result); |
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65 if not result then |
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66 module:log("warn", "Unable to decode response from recaptcha: [%d] %s", code, verify_result); |
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67 callback(false, "Captcha API error"); |
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68 elseif result.success == true then |
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69 callback(true); |
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70 else |
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71 callback(false, t_concat(result["error-codes"])); |
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72 end |
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73 end); |
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74 end |
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75 else |
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76 module:log("debug", "No Recaptcha options set, using fallback captcha") |
1231 | 77 local random = math.random; |
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78 local hmac_sha1 = require "util.hashes".hmac_sha1; |
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79 local secret = require "util.uuid".generate() |
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80 local ops = { '+', '-' }; |
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81 local captcha_tpl = get_template "simplecaptcha"; |
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82 function generate_captcha() |
1231 | 83 local op = ops[random(1, #ops)]; |
84 local x, y = random(1, 9) | |
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85 repeat |
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87 until x ~= y; |
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88 local answer; |
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89 if op == '+' then |
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90 answer = x + y; |
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91 elseif op == '-' then |
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92 if x < y then |
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93 -- Avoid negative numbers |
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94 x, y = y, x; |
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95 end |
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96 answer = x - y; |
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97 end |
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98 local challenge = hmac_sha1(secret, answer, true); |
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99 return captcha_tpl.apply { |
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100 op = op, x = x, y = y, challenge = challenge; |
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101 }; |
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102 end |
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103 function verify_captcha(request, form, callback) |
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104 if hmac_sha1(secret, form.captcha_reply, true) == form.captcha_challenge then |
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105 callback(true); |
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106 else |
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107 callback(false, "Captcha verification failed"); |
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108 end |
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109 end |
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110 end |
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111 |
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112 function generate_page(event, display_options) |
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113 local request, response = event.request, event.response; |
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114 |
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115 response.headers.content_type = "text/html; charset=utf-8"; |
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116 return render(register_tpl, { |
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117 path = request.path; hostname = module.host; |
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118 notice = display_options and display_options.register_error or ""; |
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119 captcha = generate_captcha(display_options); |
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120 }) |
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121 end |
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122 |
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123 function register_user(form, origin) |
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124 local username = form.username; |
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125 local password = form.password; |
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126 local confirm_password = form.confirm_password; |
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127 local jid = nil; |
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128 form.username, form.password, form.confirm_password = nil, nil, nil; |
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129 |
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130 local prepped_username = nodeprep(username); |
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131 if not prepped_username then |
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132 return nil, "Username contains forbidden characters"; |
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133 end |
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134 if #prepped_username == 0 then |
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135 return nil, "The username field was empty"; |
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136 end |
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137 if usermanager.user_exists(prepped_username, module.host) then |
1230
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138 return nil, "Username already taken"; |
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139 end |
2924
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140 local registering = { username = prepped_username , host = module.host, additional = form, ip = origin.conn:ip(), allowed = true } |
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141 module:fire_event("user-registering", registering); |
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142 if not registering.allowed then |
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143 return nil, registering.reason or "Registration not allowed"; |
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144 end |
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145 if confirm_password ~= password then |
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146 return nil, "Passwords don't match"; |
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147 end |
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148 local ok, err = usermanager.create_user(prepped_username, password, module.host); |
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149 if ok then |
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150 jid = prepped_username.."@"..module.host |
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151 local extra_data = {}; |
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152 for field in pairs(extra_fields) do |
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153 local field_value = form[field]; |
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154 if field_value and #field_value > 0 then |
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155 extra_data[field] = field_value; |
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156 end |
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157 end |
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|
158 if next(extra_data) ~= nil then |
1235
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159 datamanager.store(prepped_username, module.host, "account_details", extra_data); |
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160 end |
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161 module:fire_event("user-registered", { |
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162 username = prepped_username, |
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163 host = module.host, |
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164 source = module.name, |
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165 ip = origin.conn:ip(), |
1232
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166 }); |
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167 end |
2929
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168 return jid, err; |
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169 end |
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170 |
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171 function generate_success(event, jid) |
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172 return render(success_tpl, { jid = jid }); |
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173 end |
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|
174 |
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|
175 function generate_register_response(event, jid, err) |
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176 event.response.headers.content_type = "text/html; charset=utf-8"; |
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177 if jid then |
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178 return generate_success(event, jid); |
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179 else |
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180 return generate_page(event, { register_error = err }); |
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|
181 end |
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|
182 end |
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|
183 |
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|
184 function handle_form(event) |
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|
185 local request, response = event.request, event.response; |
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|
186 local form = http.formdecode(request.body); |
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1233
diff
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|
187 verify_captcha(request, form, function (ok, err) |
1226
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|
188 if ok then |
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|
189 local jid, register_err = register_user(form, request); |
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|
190 response:send(generate_register_response(event, jid, register_err)); |
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|
191 else |
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|
192 response:send(generate_page(event, { register_error = err })); |
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|
193 end |
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|
194 end); |
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|
195 return true; -- Leave connection open until we respond above |
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|
196 end |
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|
197 |
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|
198 module:provides("http", { |
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|
199 route = { |
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diff
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|
200 GET = generate_page; |
1239
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1238
diff
changeset
|
201 ["GET /"] = generate_page; |
653
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|
202 POST = handle_form; |
1239
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diff
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|
203 ["POST /"] = handle_form; |
653
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diff
changeset
|
204 }; |
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|
205 }); |