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annotate mod_data_access/mod_data_access.lua @ 486:b84493ef1d1d

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mod_data_access: Implement PUT and POST.
author Kim Alvefur <zash@zash.se>
date Mon, 28 Nov 2011 18:14:22 +0100
parents bbea8081c865
children dd7d30c175d4
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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 t_concat = table.concat;
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5 local jid_prep = require "util.jid".prep;
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6 local jid_split = require "util.jid".split;
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7 local um_test_pw = require "core.usermanager".test_password;
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8 local is_admin = require "core.usermanager".is_admin
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9 local dm_load = require "util.datamanager".load;
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10 local dm_store = require "util.datamanager".store;
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11 local dm_list_load = require "util.datamanager".list_load;
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12 local dm_list_store = require "util.datamanager".list_store;
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13 local dm_list_append = require "util.datamanager".list_append;
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14 local b64_decode = require "util.encodings".base64.decode;
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15 local http = require "net.http";
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16 local urldecode = http.urldecode;
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17 local urlencode = http.urlencode;
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18 local function http_response(code, message, extra_headers)
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19 local response = {
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20 status = code .. " " .. message;
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21 body = message .. "\n"; }
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22 if extra_headers then response.headers = extra_headers; end
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23 return response
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24 end
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25
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26 local encoders = {
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27 lua = require "util.serialization".serialize,
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28 json = require "util.json".encode
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29 };
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30 local decoders = {
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31 lua = require "util.serialization".deserialize,
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32 json = require "util.json".decode,
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33 };
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34 local content_type_map = {
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35 ["text/x-lua"] = "lua"; lua = "text/x-lua";
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36 ["application/json"] = "json"; json = "application/json";
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37 }
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38 --[[
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39 encoders.xml = function(data)
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40 return "<?xml version='1.0' encoding='utf-8'?><todo:write-this-serializer/>";
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41 end --]]
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42
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43 local allowed_methods = {
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44 GET = true, "GET",
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45 PUT = true, "PUT",
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46 POST = true, "POST",
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47 }
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48
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49 local function handle_request(method, body, request)
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50 if not allowed_methods[method] then
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51 return http_response(405, "Method Not Allowed", {["Allow"] = t_concat(allowed_methods, ", ")});
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52 end
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53
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54 if not request.headers["authorization"] then
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55 return http_response(401, "Unauthorized",
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56 {["WWW-Authenticate"]='Basic realm="WallyWorld"'})
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57 end
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58 local user, password = b64_decode(request.headers.authorization
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59 :match("[^ ]*$") or ""):match("([^:]*):(.*)");
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60 user = jid_prep(user);
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61 if not user or not password then return http_response(400, "Bad Request"); end
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62 local user_node, user_host = jid_split(user)
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63 if not hosts[user_host] then return http_response(401, "Unauthorized"); end
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64
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65 module:log("debug", "authz %s", user)
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66 if not um_test_pw(user_node, user_host, password) then
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67 return http_response(401, "Unauthorized");
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68 end
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69
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70 module:log("debug", "spliting path");
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71 local path = {};
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72 for i in string.gmatch(request.url.path, "[^/]+") do
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73 table.insert(path, i);
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74 end
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75 table.remove(path, 1); -- the first /data
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76 module:log("debug", "split path, got %d parts: %s", #path, table.concat(path, ", "));
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77
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78 if #path < 3 then
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79 module:log("debug", "since we need at least 3 parts, adding %s/%s", user_host, user_node);
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80 table.insert(path, 1, user_node);
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81 table.insert(path, 1, user_host);
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82 --return http_response(400, "Bad Request");
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83 end
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84
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85 if #path < 3 then
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86 return http_response(404, "Not Found");
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87 end
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88
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89 local p_host, p_user, p_store, p_type = unpack(path);
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90
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91 if not p_store or not p_store:match("^[%a_]+$") then
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92 return http_response(404, "Not Found");
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93 end
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94
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95 if user_host ~= path[1] or user_node ~= path[2] then
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96 -- To only give admins acces to anything, move the inside of this block after authz
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97 module:log("debug", "%s wants access to %s@%s[%s], is admin?", user, p_user, p_host, p_store)
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98 if not is_admin(user, p_host) then
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99 return http_response(403, "Forbidden");
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100 end
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101 end
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102
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103 if method == "GET" then
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104 local data = dm_load(p_user, p_host, p_store);
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105
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106 data = data or dm_load_list(p_user, p_host, p_store);
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107
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108 --TODO Use the Accept header
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109 content_type = p_type or "json";
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110 if data and encoders[content_type] then
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111 return {
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112 status = "200 OK",
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113 body = encoders[content_type](data) .. "\n",
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114 headers = {["content-type"] = content_type_map[content_type].."; charset=utf-8"}
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115 };
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116 else
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117 return http_response(404, "Not Found");
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118 end
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119 else -- POST or PUT
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120 if not body then
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121 return http_response(400, "Bad Request")
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122 end
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123 local content_type, content = request.headers["content-type"], body;
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124 content_type = content_type and content_type_map[content_type]
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125 module:log("debug", "%s: %s", content_type, tostring(content));
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126 content = content_type and decoders[content_type] and decoders[content_type](content);
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127 module:log("debug", "%s: %s", type(content), tostring(content));
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128 if not content then
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129 return http_response(400, "Bad Request")
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130 end
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131 local ok, err
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132 if method == "PUT" then
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133 ok, err = dm_store(p_user, p_host, p_store, content);
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134 elseif method == "POST" then
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135 ok, err = dm_list_append(p_user, p_host, p_store, content);
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136 elseif method == "DELETE" then
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137 dm_store(p_user, p_host, p_store, nil);
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138 dm_list_store(p_user, p_host, p_store, nil);
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139 end
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140 if ok then
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141 return http_response(201, "Created", { Location = t_concat({"/data",p_host,p_user,p_store}, "/") });
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142 else
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143 return { status = "500 Internal Server Error", body = err }
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144 end
318
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145 end
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146 end
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147
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148 local function setup()
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149 local ports = module:get_option("data_access_ports") or { 5280 };
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150 require "net.httpserver".new_from_config(ports, handle_request, { base = "data" });
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151 end
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152 if prosody.start_time then -- already started
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153 setup();
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154 else
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155 prosody.events.add_handler("server-started", setup);
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156 end