annotate mod_data_access/mod_data_access.lua @ 3656:3e0f4d727825

mod_vcard_muc: Add an alternative method of signaling avatar change When the avatar has been changed, a signal is sent that the room configuration has changed. Clients then do a disco#info query to find the SHA-1 of the new avatar. They can then fetch it as before, or not if they have it cached already. This is meant to be less disruptive than signaling via presence, which caused problems for some clients. If clients transition to the new method, the old one can eventually be removed. The namespace is made up while waiting for standardization. Otherwise it is very close to what's described in https://xmpp.org/extensions/inbox/muc-avatars.html
author Kim Alvefur <zash@zash.se>
date Sun, 25 Aug 2019 20:46:43 +0200
parents 8f17da746479
children
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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;
486
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131 else
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132 response.headers.debug = err;
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133 return 500;
486
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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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parents:
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139 end
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parents:
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140 end
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parents:
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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 });