Mercurial > prosody-modules

annotate mod_register_json/mod_register_json.lua @ 430:f0fafd19fd72

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mod_register_json: changed pestered code to something less pestered. (added nodeprep)
author Marco Cirillo <maranda@lightwitch.org>
date Thu, 15 Sep 2011 21:23:49 +0000
parents ea6641deec12
children 84e992f70ba3
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1 -- Expose a simple servlet to handle user registrations from web pages
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2 -- via JSON.
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3 --
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4 -- A Good chunk of the code is from mod_data_access.lua by Kim Alvefur
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5 -- aka Zash.
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6
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7 local jid_prep = require "util.jid".prep;
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8 local jid_split = require "util.jid".split;
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9 local usermanager = require "core.usermanager";
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10 local b64_decode = require "util.encodings".base64.decode;
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11 local json_decode = require "util.json".decode;
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12 local httpserver = require "net.httpserver";
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13 local os_time = os.time;
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14 local nodeprep = require "util.encodings".stringprep.nodeprep;
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15
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16 module.host = "*" -- HTTP/BOSH Servlets need to be global.
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17
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18 -- Pick up configuration.
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19
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20 local set_realm_name = module:get_option("reg_servlet_realm") or "Restricted";
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21 local throttle_time = module:get_option("reg_servlet_ttime") or false;
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22 local whitelist = module:get_option("reg_servlet_wl") or {};
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23 local blacklist = module:get_option("reg_servlet_bl") or {};
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24 local recent_ips = {};
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25
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26 -- Begin
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27
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28 for _, ip in ipairs(whitelist) do whitelisted_ips[ip] = true; end
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29 for _, ip in ipairs(blacklist) do blacklisted_ips[ip] = true; end
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30
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31 local function http_response(code, message, extra_headers)
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32 local response = {
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33 status = code .. " " .. message;
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34 body = message .. "\n"; }
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35 if extra_headers then response.headers = extra_headers; end
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36 return response
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37 end
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38
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39 local function handle_req(method, body, request)
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40 if request.method ~= "POST" then
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41 return http_response(405, "Bad method...", {["Allow"] = "POST"});
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42 end
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43 if not request.headers["authorization"] then
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44 return http_response(401, "No... No...",
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45 {["WWW-Authenticate"]='Basic realm="'.. set_realm_name ..'"'})
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46 end
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47
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48 local user, password = b64_decode(request.headers.authorization
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49 :match("[^ ]*$") or ""):match("([^:]*):(.*)");
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50 user = jid_prep(user);
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51 if not user or not password then return http_response(400, "What's this..?"); end
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52 local user_node, user_host = jid_split(user)
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53 if not hosts[user_host] then return http_response(401, "Negative."); end
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54
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55 module:log("warn", "%s is authing to submit a new user registration data", user)
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56 if not usermanager.test_password(user_node, user_host, password) then
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57 module:log("warn", "%s failed authentication", user)
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58 return http_response(401, "Who the hell are you?! Guards!");
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59 end
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60
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61 local req_body;
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62 -- We check that what we have is valid JSON wise else we throw an error...
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63 if not pcall(function() req_body = json_decode(body) end) then
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64 module:log("debug", "JSON data submitted for user registration by %s failed to Decode.", user);
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65 return http_response(400, "JSON Decoding failed.");
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66 else
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67 -- Decode JSON data and check that all bits are there else throw an error
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68 req_body = json_decode(body);
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69 if req_body["username"] == nil or req_body["password"] == nil or req_body["host"] == nil or req_body["ip"] == nil then
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70 module:log("debug", "%s supplied an insufficent number of elements or wrong elements for the JSON registration", user);
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71 return http_response(400, "Invalid syntax.");
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72 end
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73 -- Check if user is an admin of said host
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74 if not usermanager.is_admin(user, req_body["host"]) then
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75 module:log("warn", "%s tried to submit registration data for %s but he's not an admin", user, req_body["host"]);
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76 return http_response(401, "I obey only to my masters... Have a nice day.");
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77 else
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78 -- Checks for both Throttling/Whitelist and Blacklist (basically copycatted from prosody's register.lua code)
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79 if blacklist[req_body["ip"]] then module:log("warn", "Attempt of reg. submission to the JSON servlet from blacklisted address: %s", req_body["ip"]); return http_response(403, "The specified address is blacklisted, sorry sorry."); end
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80 if throttle_time and not whitelist[req_body["ip"]] then
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81 if not recent_ips[req_body["ip"]] then
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82 recent_ips[req_body["ip"]] = { time = os_time(), count = 1 };
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83 else
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84 local ip = recent_ips[req_body["ip"]];
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85 ip.count = ip.count + 1;
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86
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87 if os_time() - ip.time < throttle_time then
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88 ip.time = os_time();
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89 module:log("warn", "JSON Registration request from %s has been throttled.", req_body["ip"]);
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90 return http_response(503, "Woah... How many users you want to register..? Request throttled, wait a bit and try again.");
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91 end
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92 ip.time = os_time();
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93 end
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94 end
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95
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96 -- We first check if the supplied username for registration is already there.
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97 -- And nodeprep the username
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98 local username = nodeprep(req_body["username"]);
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99 if not usermanager.user_exists(username, req_body["host"]) then
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100 if not username then
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101 module:log("debug", "%s supplied an username containing invalid characters: %s", user, username);
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102 return http_response(406, "Supplied username contains invalid characters, see RFC 6122.");
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103 else
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104 usermanager.create_user(username, req_body["password"], req_body["host"]);
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105 module:log("debug", "%s registration data submission for %s is successful", user, username);
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106 return http_response(200, "Done.");
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107 end
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108 else
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109 module:log("debug", "%s registration data submission for %s failed (user already exists)", user, username);
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110 return http_response(409, "User already exists.");
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111 end
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112 end
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113 end
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114 end
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115
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116 -- Set it up!
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117 local function setup()
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118 local ports = module:get_option("reg_servlet_ports") or { 9280 };
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119 local port_number, base_name, ssl_table;
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120 for _, opts in ipairs(ports) do
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121 if type(opts) == "number" then
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122 port_number, base_name = opts, "register_account";
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123 elseif type(opts) == "table" then
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124 port_number, base_name, ssl_table = opts.port or 9280, opts.path or "register_account", opts.ssl or nil;
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125 elseif type(opts) == "string" then
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126 base_name, port_number = opts, 9280;
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127 end
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128 end
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129
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130 if ssl_table == nil then
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131 ports = { { port = port_number } };
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132 httpserver.new_from_config(ports, handle_req, { base = base_name });
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133 else
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134 if port_number == 9280 then port_number = 9443; end
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135 ports = { { port = port_number, ssl = ssl_table } };
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136 httpserver.new_from_config(ports, handle_req, { base = base_name });
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137 end
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138 end
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139
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140 if prosody.start_time then -- already started
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141 setup();
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142 else
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143 prosody.events.add_handler("server-started", setup);
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144 end