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annotate mod_data_access/mod_data_access.lua @ 318:84caab2bc02c

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mod_data_access: New plugin providing a HTTP interface to Prosodys datamanager
author Kim Alvefur <zash@zash.se>
date Wed, 19 Jan 2011 20:18:38 +0100
parents
children 52f2188ec47d
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84caab2bc02c mod_data_access: New plugin providing a HTTP interface to Prosodys datamanager
Kim Alvefur <zash@zash.se>
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1 -- HTTP Access to datamanager
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2 -- By Kim Alvefur <zash@zash.se>
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3
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4 local jid_prep = require "util.jid".prep;
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5 local jid_split = require "util.jid".split;
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6 local um_test_pw = require "core.usermanager".test_password;
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7 local is_admin = require "core.usermanager".is_admin
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8 local dm_load = require "util.datamanager".load;
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9 local dm_list_load = require "util.datamanager".list_load;
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10 local b64_decode = require "util.encodings".base64.decode;
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11 --local urldecode = require "net.http".urldecode;
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12 --[[local urlparams = --require "net.http".getQueryParams or whatever MattJ names it
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13 function(s)
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14 if not s:match("=") then return urldecode(s); end
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15 local r = {}
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16 s:gsub("([^=&]*)=([^&]*)", function(k,v)
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17 r[ urldecode(k) ] = urldecode(v);
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18 return nil
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19 end)
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20 return r
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21 end;
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22 --]]
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23
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24 local function http_response(code, message, extra_headers)
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25 local response = {
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26 status = code .. " " .. message;
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27 body = message .. "\n"; }
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28 if extra_headers then response.headers = extra_headers; end
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29 return response
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30 end
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31
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32 local encoders = {
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33 lua = require "util.serialization".serialize,
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34 json = require "util.json".encode
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35 };
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36 --[[
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37 encoders.xml = function(data)
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38 return "<?xml version='1.0' encoding='utf-8'?><todo:write-this-serializer/>";
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39 end --]]
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40
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41 local function handle_request(method, body, request)
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42 if request.method ~= "GET" then
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43 return http_response(405, "Method Not Allowed", {["Allow"] = "GET"});
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44 end -- TODO Maybe PUT?
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45
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46 if not request.headers["authorization"] then
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47 return http_response(401, "Unauthorized",
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48 {["WWW-Authenticate"]='Basic realm="WallyWorld"'})
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49 end
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50 local user, password = b64_decode(request.headers.authorization
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51 :match("[^ ]*$") or ""):match("([^:]*):(.*)");
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52 user = jid_prep(user);
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53 if not user or not password then return http_response(400, "Bad Request"); end
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54 local user_node, user_host = jid_split(user)
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55 if not hosts[user_host] then return http_response(401, "Unauthorized"); end
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56
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57 module:log("debug", "authz %s", user)
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58 if not um_test_pw(user_node, user_host, password) then
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59 return http_response(401, "Unauthorized");
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60 end
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61
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62 module:log("debug", "spliting path");
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63 local path = {};
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64 for i in string.gmatch(request.url.path, "[^/]+") do
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65 table.insert(path, i);
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66 end
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67 table.remove(path, 1); -- the first /data
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68 module:log("debug", "split path, got %d parts: %s", #path, table.concat(path, ", "));
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69
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70 if #path < 3 then
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71 module:log("debug", "since we need at least 3 parts, adding %s/%s", user_host, user_node);
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72 table.insert(path, 1, user_node);
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73 table.insert(path, 1, user_host);
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74 --return http_response(400, "Bad Request");
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75 end
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76
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77 if #path < 3 then
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78 return http_response(404, "Not Found");
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79 end
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80
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81 if user_host ~= path[1] or user_node ~= path[2] then
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82 -- To only give admins acces to anything, move the inside of this block after authz
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83 module:log("debug", "%s wants access to %s@%s[%s], is admin?", user, path[2], path[1], path[3])
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84 if not is_admin(user, path[1]) then
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85 return http_response(403, "Forbidden");
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86 end
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87 end
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88
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89 local data = dm_load(path[2], path[1], path[3]);
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90
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91 data = data or dm_list_load(path[2], path[1], path[3]);
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92
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93 if data and encoders[path[4] or "json"] then
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94 return {
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95 status = "200 OK",
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96 body = encoders[path[4] or "json"](data) .. "\n",
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97 headers = {["content-type"] = "text/plain; charset=utf-8"}
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98 --headers = {["content-type"] = encoders[data[4] or "json"].mime .. "; charset=utf-8"}
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99 -- FIXME a little nicer that the above
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100 -- Also, would be cooler to use the Accept header, but parsing it ...
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101 };
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102 else
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103 return http_response(404, "Not Found");
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104 end
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105 end
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106
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107 local function setup()
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108 local ports = module:get_option("data_access_ports") or { 5280 };
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109 require "net.httpserver".new_from_config(ports, handle_request, { base = "data" });
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110 end
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111 if prosody.start_time then -- already started
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112 setup();
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113 else
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114 prosody.events.add_handler("server-started", setup);
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115 end