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annotate mod_auth_http_cookie/mod_auth_http_cookie.lua @ 5668:ecfd7aece33b

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mod_measure_modules: Report module statuses via OpenMetrics Someone in the chat asked about a health check endpoint, which reminded me of mod_http_status, which provides access to module statuses with full details. After that, this idea came about, which seems natural. As noted in the README, it could be used to monitor that critical modules are in fact loaded correctly. As more modules use the status API, the more useful this module and mod_http_status becomes.
author Kim Alvefur <zash@zash.se>
date Fri, 06 Oct 2023 18:34:39 +0200
parents b7aa8630438e
children
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1 -- Prosody IM
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2 -- Copyright (C) 2008-2013 Matthew Wild
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3 -- Copyright (C) 2008-2013 Waqas Hussain
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4 -- Copyright (C) 2014 Kim Alvefur
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5 --
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6 -- This project is MIT/X11 licensed. Please see the
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7 -- COPYING file in the source package for more information.
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8 --
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9
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10 local new_sasl = require "util.sasl".new;
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11 local base64 = require "util.encodings".base64.encode;
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12 local have_async, async = pcall(require, "util.async");
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13
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14 local nodeprep = require "util.encodings".stringprep.nodeprep;
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15
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16 local log = module._log;
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17 local host = module.host;
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18
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19 local password_auth_url = module:get_option_string("http_auth_url", ""):gsub("$host", host);
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20
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21 local cookie_auth_url = module:get_option_string("http_cookie_auth_url");
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22 if cookie_auth_url then
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23 cookie_auth_url = cookie_auth_url:gsub("$host", host);
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24 end
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25
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26 local external_needs_authzid = cookie_auth_url and cookie_auth_url:match("$user");
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27
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28 if password_auth_url == "" and not cookie_auth_url then error("http_auth_url or http_cookie_auth_url required") end
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29
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30
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31 local provider = {};
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32
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33 -- globals required by socket.http
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34 if rawget(_G, "PROXY") == nil then
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35 rawset(_G, "PROXY", false)
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36 end
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37 if rawget(_G, "base_parsed") == nil then
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38 rawset(_G, "base_parsed", false)
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39 end
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40 if not have_async then -- FINE! Set your globals then
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41 prosody.unlock_globals()
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42 require "ltn12"
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43 require "socket"
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44 require "socket.http"
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45 require "ssl.https"
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46 prosody.lock_globals()
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47 end
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48
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49 local function async_http_request(url, headers)
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50 module:log("debug", "async_http_auth()");
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51 local http = require "net.http";
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52 local wait, done = async.waiter();
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53 local content, code, request, response;
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54 local ex = {
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55 headers = headers;
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56 }
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57 local function cb(content_, code_, request_, response_)
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58 content, code, request, response = content_, code_, request_, response_;
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59 done();
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60 end
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61 http.request(url, ex, cb);
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62 wait();
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63 log("debug", "response code %s", tostring(code));
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64 if code >= 200 and code <= 299 then
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65 return true, content;
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66 end
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67 return nil;
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68 end
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69
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70 local function sync_http_request(url, headers)
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71 module:log("debug", "sync_http_auth()");
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72 require "ltn12";
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73 local http = require "socket.http";
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74 local https = require "ssl.https";
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75 local request;
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76 if string.sub(url, 1, string.len('https')) == 'https' then
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77 request = https.request;
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78 else
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79 request = http.request;
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80 end
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81 local body_chunks = {};
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82 local _, code, headers, status = request{
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83 url = url,
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84 headers = headers;
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85 sink = ltn12.sink.table(body_chunks);
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86 };
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87 log("debug", "response code %s %s", type(code), tostring(code));
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88 if type(code) == "number" and code >= 200 and code <= 299 then
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89 log("debug", "success")
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90 return true, table.concat(body_chunks);
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91 end
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92 return nil;
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93 end
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94
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95 local http_request = have_async and async_http_request or sync_http_request;
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96
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97 function http_test_password(username, password)
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98 local url = password_auth_url:gsub("$user", username):gsub("$password", password);
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99 log("debug", "Testing password for user %s at host %s with URL %s", username, host, url);
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100 local ok = (http_request(url, { Authorization = "Basic "..base64(username..":"..password); }));
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101 if not ok then
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102 return nil, "not authorized";
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103 end
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104 return true;
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105 end
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106
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107 function http_test_cookie(cookie, username)
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108 local url = external_needs_authzid and cookie_auth_url:gsub("$user", username) or cookie_auth_url;
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109 log("debug", "Testing cookie auth for user %s at host %s with URL %s", username or "<unknown>", host, url);
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110 local ok, resp = http_request(url, { Cookie = cookie; });
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111 if not ok then
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112 return nil, "not authorized";
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113 end
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114
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115 return external_needs_authzid or resp;
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116 end
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117
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118 function provider.test_password(username, password)
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119 return http_test_password(username, password);
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120 end
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121
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122 function provider.users()
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123 return function()
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124 return nil;
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125 end
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126 end
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127
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128 function provider.set_password(username, password)
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129 return nil, "Changing passwords not supported";
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130 end
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131
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132 function provider.user_exists(username)
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133 return true;
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134 end
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135
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136 function provider.create_user(username, password)
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137 return nil, "User creation not supported";
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138 end
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139
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140 function provider.delete_user(username)
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141 return nil , "User deletion not supported";
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142 end
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143
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144 local function get_session_cookies(session)
3224
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145 local request = session.websocket_request; -- WebSockets
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146 if not request and session.requests then -- BOSH
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147 request = session.requests[1];
3223
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148 end
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149 if not request and session.conn._http_open_response then -- Fallback BOSH
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150 local response = session.conn._http_open_response;
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151 request = response and response.request;
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parents: 3037
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152 end
3037
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153 if request then
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154 return request.headers.cookie;
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155 end
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156 end
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157
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158 function provider.get_sasl_handler(session)
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159 local cookie = cookie_auth_url and get_session_cookies(session);
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160 log("debug", "Request cookie: %s", cookie);
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161 return new_sasl(host, {
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162 plain_test = function(sasl, username, password, realm)
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163 return provider.test_password(username, password), true;
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164 end;
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diff changeset
165 external = cookie and function (authzid)
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166 if external_needs_authzid then
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167 -- Authorize the username provided by the client, using request cookie
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parents:
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168 if authzid ~= "" then
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169 module:log("warn", "Client requested authzid, but cookie auth URL does not contain $user variable");
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170 return nil;
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parents:
diff changeset
171 end
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172 local success = http_test_cookie(cookie);
bae7b0a002ef mod_auth_http_cookie: Possibly temporary fork of mod_http_auth_async that adds cookie auth support
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parents:
diff changeset
173 if not success then
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diff changeset
174 return nil;
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Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
175 end
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parents:
diff changeset
176 return nodeprep(authzid), true;
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diff changeset
177 else
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parents:
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178 -- Authorize client using request cookie, username comes from auth server
bae7b0a002ef mod_auth_http_cookie: Possibly temporary fork of mod_http_auth_async that adds cookie auth support
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parents:
diff changeset
179 if authzid == "" then
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parents:
diff changeset
180 module:log("warn", "Client did not provide authzid, but cookie auth URL contains $user variable");
bae7b0a002ef mod_auth_http_cookie: Possibly temporary fork of mod_http_auth_async that adds cookie auth support
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parents:
diff changeset
181 return nil;
bae7b0a002ef mod_auth_http_cookie: Possibly temporary fork of mod_http_auth_async that adds cookie auth support
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parents:
diff changeset
182 end
bae7b0a002ef mod_auth_http_cookie: Possibly temporary fork of mod_http_auth_async that adds cookie auth support
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parents:
diff changeset
183 local unprepped_username = http_test_cookie(cookie, nodeprep(authzid));
bae7b0a002ef mod_auth_http_cookie: Possibly temporary fork of mod_http_auth_async that adds cookie auth support
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parents:
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184 local username = nodeprep(unprepped_username);
bae7b0a002ef mod_auth_http_cookie: Possibly temporary fork of mod_http_auth_async that adds cookie auth support
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parents:
diff changeset
185 if not username then
bae7b0a002ef mod_auth_http_cookie: Possibly temporary fork of mod_http_auth_async that adds cookie auth support
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parents:
diff changeset
186 if unprepped_username then
bae7b0a002ef mod_auth_http_cookie: Possibly temporary fork of mod_http_auth_async that adds cookie auth support
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parents:
diff changeset
187 log("warn", "Username supplied by cookie_auth_url is not valid for XMPP");
bae7b0a002ef mod_auth_http_cookie: Possibly temporary fork of mod_http_auth_async that adds cookie auth support
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
188 end
bae7b0a002ef mod_auth_http_cookie: Possibly temporary fork of mod_http_auth_async that adds cookie auth support
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
189 return nil;
bae7b0a002ef mod_auth_http_cookie: Possibly temporary fork of mod_http_auth_async that adds cookie auth support
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
190 end
bae7b0a002ef mod_auth_http_cookie: Possibly temporary fork of mod_http_auth_async that adds cookie auth support
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
191 return username, true;
bae7b0a002ef mod_auth_http_cookie: Possibly temporary fork of mod_http_auth_async that adds cookie auth support
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
192 end;
bae7b0a002ef mod_auth_http_cookie: Possibly temporary fork of mod_http_auth_async that adds cookie auth support
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
193 end;
bae7b0a002ef mod_auth_http_cookie: Possibly temporary fork of mod_http_auth_async that adds cookie auth support
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
194 });
bae7b0a002ef mod_auth_http_cookie: Possibly temporary fork of mod_http_auth_async that adds cookie auth support
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
195 end
bae7b0a002ef mod_auth_http_cookie: Possibly temporary fork of mod_http_auth_async that adds cookie auth support
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
196
bae7b0a002ef mod_auth_http_cookie: Possibly temporary fork of mod_http_auth_async that adds cookie auth support
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
197 module:provides("auth", provider);