Mercurial > prosody-modules

annotate mod_register_json/mod_register_json.lua @ 536:09280dd0b22e

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mod_register_json: replaced prosody.events.add_handler with module:hook.
author Marco Cirillo <maranda@lightwitch.org>
date Sun, 08 Jan 2012 03:53:09 +0000
parents 84e992f70ba3
children 4691e72a055c
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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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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...", {["WWW-Authenticate"]='Basic realm="'.. set_realm_name ..'"'})
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45 end
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46
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47 local user, password = b64_decode(request.headers.authorization:match("[^ ]*$") or ""):match("([^:]*):(.*)")
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48 user = jid_prep(user)
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49 if not user or not password then return http_response(400, "What's this..?") end
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50 local user_node, user_host = jid_split(user)
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51 if not hosts[user_host] then return http_response(401, "Negative.") end
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52
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53 module:log("warn", "%s is authing to submit a new user registration data", user)
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54 if not usermanager.test_password(user_node, user_host, password) then
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55 module:log("warn", "%s failed authentication", user)
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56 return http_response(401, "Who the hell are you?! Guards!")
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57 end
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58
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59 local req_body
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60 -- We check that what we have is valid JSON wise else we throw an error...
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61 if not pcall(function() req_body = json_decode(body) end) then
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62 module:log("debug", "JSON data submitted for user registration by %s failed to Decode.", user)
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63 return http_response(400, "JSON Decoding failed.")
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64 else
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65 -- Decode JSON data and check that all bits are there else throw an error
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66 req_body = json_decode(body)
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67 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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68 module:log("debug", "%s supplied an insufficent number of elements or wrong elements for the JSON registration", user)
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69 return http_response(400, "Invalid syntax.")
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70 end
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71 -- Check if user is an admin of said host
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72 if not usermanager.is_admin(user, req_body["host"]) then
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73 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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74 return http_response(401, "I obey only to my masters... Have a nice day.")
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75 else
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76 -- Checks for both Throttling/Whitelist and Blacklist (basically copycatted from prosody's register.lua code)
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77 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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78 if throttle_time and not whitelist[req_body["ip"]] then
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79 if not recent_ips[req_body["ip"]] then
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80 recent_ips[req_body["ip"]] = { time = os_time(), count = 1 }
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81 else
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82 local ip = recent_ips[req_body["ip"]]
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83 ip.count = ip.count + 1
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84
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85 if os_time() - ip.time < throttle_time then
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86 ip.time = os_time()
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87 module:log("warn", "JSON Registration request from %s has been throttled.", req_body["ip"])
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88 return http_response(503, "Woah... How many users you want to register..? Request throttled, wait a bit and try again.")
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89 end
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90 ip.time = os_time()
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91 end
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92 end
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93
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94 -- We first check if the supplied username for registration is already there.
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95 -- And nodeprep the username
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96 local username = nodeprep(req_body["username"])
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97 if not usermanager.user_exists(username, req_body["host"]) then
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98 if not username then
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99 module:log("debug", "%s supplied an username containing invalid characters: %s", user, username)
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100 return http_response(406, "Supplied username contains invalid characters, see RFC 6122.")
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101 else
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102 usermanager.create_user(username, req_body["password"], req_body["host"])
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103 module:log("debug", "%s registration data submission for %s is successful", user, username)
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104 return http_response(200, "Done.")
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105 end
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106 else
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107 module:log("debug", "%s registration data submission for %s failed (user already exists)", user, username)
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108 return http_response(409, "User already exists.")
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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
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114 -- Set it up!
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115 local function setup()
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116 local ports = module:get_option("reg_servlet_ports") or { 9280 }
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117 local port_number, base_name, ssl_table
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118 for _, opts in ipairs(ports) do
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119 if type(opts) == "number" then
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120 port_number, base_name = opts, "register_account"
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121 elseif type(opts) == "table" then
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122 port_number, base_name, ssl_table = opts.port or 9280, opts.path or "register_account", opts.ssl or nil
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123 elseif type(opts) == "string" then
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124 base_name, port_number = opts, 9280
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125 end
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126 end
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127
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128 if ssl_table == nil then
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129 ports = { { port = port_number } }
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130 httpserver.new_from_config(ports, handle_req, { base = base_name })
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131 else
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132 if port_number == 9280 then port_number = 9443 end
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133 ports = { { port = port_number, ssl = ssl_table } }
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134 httpserver.new_from_config(ports, handle_req, { base = base_name })
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135 end
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136 end
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137
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138 if prosody.start_time then -- already started
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139 setup()
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140 else
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141 module:hook("server-started", setup)
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142 end