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mod_data_access/mod_data_access.lua @ 3923:3c3d216c6f6d
mod_rest: Add JSON mapping of XEP-0039: Statistics Gathering
author | Kim Alvefur <zash@zash.se> |
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date | Fri, 28 Feb 2020 22:38:41 +0100 |
parent | 2872:8f17da746479 |
rev | line source |
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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 t_insert = table.insert; |
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6 local jid_prep = require "util.jid".prep; |
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7 local jid_split = require "util.jid".split; |
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8 local test_password = require "core.usermanager".test_password; |
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9 local is_admin = require "core.usermanager".is_admin |
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10 local dm_load = require "util.datamanager".load; |
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11 local dm_store = require "util.datamanager".store; |
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12 local dm_list_load = require "util.datamanager".list_load; |
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13 local dm_list_store = require "util.datamanager".list_store; |
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14 local dm_list_append = require "util.datamanager".list_append; |
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15 local b64_decode = require "util.encodings".base64.decode; |
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16 local saslprep = require "util.encodings".stringprep.saslprep; |
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17 local realm = module:get_host() .. "/" .. module:get_name(); |
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18 module:depends"http"; |
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19 |
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20 local encoders = { |
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21 lua = require "util.serialization".serialize, |
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22 json = require "util.json".encode |
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23 }; |
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24 local decoders = { |
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25 lua = require "util.serialization".deserialize, |
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26 json = require "util.json".decode, |
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27 }; |
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28 local content_type_map = { |
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29 ["text/x-lua"] = "lua"; lua = "text/x-lua"; |
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30 ["application/json"] = "json"; json = "application/json"; |
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31 } |
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32 |
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33 local function require_valid_user(f) |
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34 return function(event, path) |
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35 local request = event.request; |
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36 local response = event.response; |
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37 local headers = request.headers; |
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38 if not headers.authorization then |
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39 response.headers.www_authenticate = ("Basic realm=%q"):format(realm); |
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40 return 401 |
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41 end |
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42 local from_jid, password = b64_decode(headers.authorization:match"[^ ]*$"):match"([^:]*):(.*)"; |
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43 from_jid = jid_prep(from_jid); |
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44 password = saslprep(password); |
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45 if from_jid and password then |
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46 local user, host = jid_split(from_jid); |
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47 local ok, err = test_password(user, host, password); |
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48 if ok and user and host then |
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49 return f(event, path, from_jid); |
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50 elseif err then |
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51 module:log("debug", "User failed authentication: %s", err); |
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52 end |
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53 end |
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54 return 401 |
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55 end |
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56 end |
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57 |
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58 local function handle_request(event, path, authed_user) |
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59 local request, response = event.request, event.response; |
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60 |
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61 --module:log("debug", "spliting path"); |
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62 local path_items = {}; |
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63 for i in string.gmatch(path, "[^/]+") do |
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64 t_insert(path_items, i); |
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65 end |
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66 --module:log("debug", "split path, got %d parts: %s", #path_items, table.concat(path_items, ", ")); |
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67 |
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68 local user_node, user_host = jid_split(authed_user); |
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69 if #path_items < 3 then |
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70 --module:log("debug", "since we need at least 3 parts, adding %s/%s", user_host, user_node); |
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71 t_insert(path_items, 1, user_node); |
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72 t_insert(path_items, 1, user_host); |
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73 --return http_response(400, "Bad Request"); |
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74 end |
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75 |
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76 if #path_items < 3 then |
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77 return 404; |
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78 end |
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79 |
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80 local p_host, p_user, p_store, p_type = unpack(path_items); |
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81 |
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82 if not p_store or not p_store:match("^[%a_]+$") then |
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83 return 404; |
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84 end |
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85 |
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86 if user_host ~= path_items[1] or user_node ~= path_items[2] then |
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87 -- To only give admins access to anything, move the inside of this block after authz |
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88 --module:log("debug", "%s wants access to %s@%s[%s], is admin?", authed_user, p_user, p_host, p_store) |
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89 if not is_admin(authed_user, p_host) then |
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90 return 403; |
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91 end |
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92 end |
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93 |
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94 local method = request.method; |
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95 if method == "GET" then |
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96 local data = dm_load(p_user, p_host, p_store); |
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97 |
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98 data = data or dm_list_load(p_user, p_host, p_store); |
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99 |
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100 --TODO Use the Accept header |
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101 local content_type = p_type or "json"; |
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102 if data and encoders[content_type] then |
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103 response.headers.content_type = content_type_map[content_type].."; charset=utf-8"; |
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104 return encoders[content_type](data); |
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105 else |
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106 return 404; |
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107 end |
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108 elseif method == "POST" or method == "PUT" then |
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109 local body = request.body; |
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110 if not body then |
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111 |
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112 return 400; |
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113 end |
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114 local content_type, content = request.headers.content_type, body; |
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115 content_type = content_type and content_type_map[content_type] |
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116 --module:log("debug", "%s: %s", content_type, tostring(content)); |
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117 content = content_type and decoders[content_type] and decoders[content_type](content); |
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118 --module:log("debug", "%s: %s", type(content), tostring(content)); |
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119 if not content then |
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120 return 400; |
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121 end |
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122 local ok, err |
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123 if method == "PUT" then |
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124 ok, err = dm_store(p_user, p_host, p_store, content); |
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125 elseif method == "POST" then |
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126 ok, err = dm_list_append(p_user, p_host, p_store, content); |
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127 end |
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128 if ok then |
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129 response.headers.location = t_concat({module:http_url(nil,"/data"),p_host,p_user,p_store}, "/"); |
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130 return 201; |
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131 else |
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132 response.headers.debug = err; |
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133 return 500; |
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134 end |
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135 elseif method == "DELETE" then |
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136 dm_store(p_user, p_host, p_store, nil); |
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137 dm_list_store(p_user, p_host, p_store, nil); |
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138 return 204; |
318
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139 end |
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140 end |
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141 |
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142 local handle_request_with_auth = require_valid_user(handle_request); |
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143 |
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144 module:provides("http", { |
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145 default_path = "/data"; |
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146 route = { |
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147 ["GET /*"] = handle_request_with_auth, |
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148 ["PUT /*"] = handle_request_with_auth, |
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149 ["POST /*"] = handle_request_with_auth, |
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150 ["DELETE /*"] = handle_request_with_auth, |
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151 }; |
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152 }); |