Mercurial > prosody-modules

annotate mod_register_json/mod_register_json.lua @ 723:c26652d055b5

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mod_register_json: moved throttling logic so that if there's a failure during nick registration the user can retry and referenced usermanager from prosody's _G instead of req. it.
author Marco Cirillo <maranda@lightwitch.org>
date Mon, 25 Jun 2012 22:20:27 +0000
parents 9080b0898b6f
children 836e4e110c71
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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 = 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 os_time = os.time
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13 local nodeprep = require "util.encodings".stringprep.nodeprep
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14
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15 module:depends("http")
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16
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17 -- Pick up configuration.
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18
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19 local secure = module:get_option_boolean("reg_servlet_secure", true)
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20 local set_realm_name = module:get_option_string("reg_servlet_realm", "Restricted")
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21 local base_path = module:get_option_string("reg_servlet_base", "/register_account/")
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22 local throttle_time = module:get_option_number("reg_servlet_ttime", nil)
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23 local whitelist = module:get_option_set("reg_servlet_wl", {})
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24 local blacklist = module:get_option_set("reg_servlet_bl", {})
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25 local recent_ips = {}
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27 -- Begin
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28
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29 local function http_response(event, code, message, headers)
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30 local response = event.response
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31
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32 if headers then
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33 for header, data in pairs(headers) do response.headers[header] = data end
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34 end
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35
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36 response.headers.content_type = "application/json"
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37 response.status_code = code
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38 response:send(message)
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39 end
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40
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41 local function handle_req(event)
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42 local request = event.request
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43 local body = request.body
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44
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45 if request.method ~= "POST" then
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46 return http_response(event, 405, "Bad method...", {["Allow"] = "POST"})
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47 end
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48 if not request.headers["authorization"] then
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49 return http_response(event, 401, "No... No...", {["WWW-Authenticate"]='Basic realm="'.. set_realm_name ..'"'})
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50 end
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51
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52 local user, password = b64_decode(request.headers.authorization:match("[^ ]*$") or ""):match("([^:]*):(.*)")
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53 user = jid_prep(user)
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54 if not user or not password then return http_response(event, 400, "What's this..?") end
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55 local user_node, user_host = jid_split(user)
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56 if not hosts[user_host] then return http_response(event, 401, "Negative.") end
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57
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58 module:log("warn", "%s is authing to submit a new user registration data", user)
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59 if not usermanager.test_password(user_node, user_host, password) then
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60 module:log("warn", "%s failed authentication", user)
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61 return http_response(event, 401, "Who the hell are you?! Guards!")
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62 end
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63
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64 local req_body
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65 -- We check that what we have is valid JSON wise else we throw an error...
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66 if not pcall(function() req_body = json_decode(body) end) then
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67 module:log("debug", "JSON data submitted for user registration by %s failed to Decode.", user)
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68 return http_response(event, 400, "JSON Decoding failed.")
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69 else
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70 -- Decode JSON data and check that all bits are there else throw an error
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71 req_body = json_decode(body)
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72 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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73 module:log("debug", "%s supplied an insufficent number of elements or wrong elements for the JSON registration", user)
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74 return http_response(event, 400, "Invalid syntax.")
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75 end
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76 -- Check if user is an admin of said host
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77 if not usermanager.is_admin(user, req_body["host"]) then
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78 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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79 return http_response(event, 401, "I obey only to my masters... Have a nice day.")
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80 else
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81 -- Blacklist can be checked here.
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82 if blacklist:contains(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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83
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84 -- We first check if the supplied username for registration is already there.
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85 -- And nodeprep the username
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86 local username = nodeprep(req_body["username"])
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87 if not username then
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88 module:log("debug", "%s supplied an username containing invalid characters: %s", user, username)
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89 return http_response(event, 406, "Supplied username contains invalid characters, see RFC 6122.")
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90 else
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91 if not usermanager.user_exists(username, req_body["host"]) then
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92 -- if username fails to register successive requests shouldn't be throttled until one is successful.
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93 if throttle_time and not whitelist:contains(req_body["ip"]) then
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94 if not recent_ips[req_body["ip"]] then
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95 recent_ips[req_body["ip"]] = os_time()
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96 else
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97 if os_time() - recent_ips[req_body["ip"]] < throttle_time then
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98 recent_ips[req_body["ip"]] = os_time()
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99 module:log("warn", "JSON Registration request from %s has been throttled.", req_body["ip"])
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100 return http_response(event, 503, "Woah... How many users you want to register..? Request throttled, wait a bit and try again.")
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101 end
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102 recent_ips[req_body["ip"]] = os_time()
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103 end
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104 end
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105
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106 local ok, error = usermanager.create_user(username, req_body["password"], req_body["host"])
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107 if ok then
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108 hosts[req_body["host"]].events.fire_event("user-registered", { username = username, host = req_body["host"], source = "mod_register_json", session = { ip = req_body["ip"] } })
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diff changeset
109 module:log("debug", "%s registration data submission for %s@%s is successful", user, username, req_body["host"])
648
6f0e0d6790a7 mod_register_json: updated to current HTTP API.
Marco Cirillo <maranda@lightwitch.org>
parents: 607
diff changeset
110 return http_response(event, 200, "Done.")
553
7310ceb7564f mod_register_json: checking out if the user creation succeeded or not is good practice.
Marco Cirillo <maranda@lightwitch.org>
parents: 551
diff changeset
111 else
7310ceb7564f mod_register_json: checking out if the user creation succeeded or not is good practice.
Marco Cirillo <maranda@lightwitch.org>
parents: 551
diff changeset
112 module:log("error", "user creation failed: "..error)
651
78a23a7dc613 mod_register_json: fixed typo, added https/http switch and default value to it.
Marco Cirillo <maranda@lightwitch.org>
parents: 648
diff changeset
113 return http_response(event, 500, "Encountered server error while creating the user: "..error)
553
7310ceb7564f mod_register_json: checking out if the user creation succeeded or not is good practice.
Marco Cirillo <maranda@lightwitch.org>
parents: 551
diff changeset
114 end
721
9080b0898b6f mod_register_json: modify logic to prevent an unnecessary call to usermanager.
Marco Cirillo <maranda@lightwitch.org>
parents: 710
diff changeset
115 else
9080b0898b6f mod_register_json: modify logic to prevent an unnecessary call to usermanager.
Marco Cirillo <maranda@lightwitch.org>
parents: 710
diff changeset
116 module:log("debug", "%s registration data submission for %s failed (user already exists)", user, username)
9080b0898b6f mod_register_json: modify logic to prevent an unnecessary call to usermanager.
Marco Cirillo <maranda@lightwitch.org>
parents: 710
diff changeset
117 return http_response(event, 409, "User already exists.")
429
ea6641deec12 mod_register_json: added check for invalid characters in the username.
Marco Cirillo <maranda@lightwitch.org>
parents: 370
diff changeset
118 end
361
146496a3be78 mod_register_json: Failed at JSON successful decode check, fixed with a code refactor.
Marco Cirillo <maranda@lightwitch.org>
parents: 360
diff changeset
119 end
355
a5da789b2e7d mod_register_json: First commit (needs tests).
Marco Cirillo <maranda@lightwitch.org>
parents:
diff changeset
120 end
a5da789b2e7d mod_register_json: First commit (needs tests).
Marco Cirillo <maranda@lightwitch.org>
parents:
diff changeset
121 end
a5da789b2e7d mod_register_json: First commit (needs tests).
Marco Cirillo <maranda@lightwitch.org>
parents:
diff changeset
122 end
a5da789b2e7d mod_register_json: First commit (needs tests).
Marco Cirillo <maranda@lightwitch.org>
parents:
diff changeset
123
359
5d22ebcb9ec5 mod_register_json: Changed log levels, added a few primitive throttling/whitelist/blacklist options
Marco Cirillo <maranda@lightwitch.org>
parents: 358
diff changeset
124 -- Set it up!
560
b62f5e38f865 mod_register_json: added auto-cleanup logic to the module so it can at least be unloaded and reloaded without fuss. (Experimental: works with server_select and trunk)
Marco Cirillo <maranda@lightwitch.org>
parents: 553
diff changeset
125
655
81d269f97ea2 mod_register_json: revert change, it's not needed (providing http provides https as well)
Marco Cirillo <maranda@lightwitch.org>
parents: 651
diff changeset
126 module:provides("http", {
648
6f0e0d6790a7 mod_register_json: updated to current HTTP API.
Marco Cirillo <maranda@lightwitch.org>
parents: 607
diff changeset
127 default_path = base_path,
6f0e0d6790a7 mod_register_json: updated to current HTTP API.
Marco Cirillo <maranda@lightwitch.org>
parents: 607
diff changeset
128 route = {
6f0e0d6790a7 mod_register_json: updated to current HTTP API.
Marco Cirillo <maranda@lightwitch.org>
parents: 607
diff changeset
129 ["GET /"] = handle_req,
6f0e0d6790a7 mod_register_json: updated to current HTTP API.
Marco Cirillo <maranda@lightwitch.org>
parents: 607
diff changeset
130 ["POST /"] = handle_req
6f0e0d6790a7 mod_register_json: updated to current HTTP API.
Marco Cirillo <maranda@lightwitch.org>
parents: 607
diff changeset
131 }
6f0e0d6790a7 mod_register_json: updated to current HTTP API.
Marco Cirillo <maranda@lightwitch.org>
parents: 607
diff changeset
132 })