plugins/mod_storage_xep0227.lua

   1
   2 local ipairs, pairs = ipairs, pairs;
   3 local setmetatable = setmetatable;
   4 local tostring = tostring;
   5 local next = next;
   6 local t_remove = table.remove;
   7 local os_remove = os.remove;
   8 local io_open = io.open;
   9
  10 local paths = require"util.paths";
  11 local st = require "util.stanza";
  12 local parse_xml_real = require "util.xml".parse;
  13
  14 local function getXml(user, host)
  15         local jid = user.."@"..host;
  16         local path = paths.join(prosody.paths.data, jid..".xml");
  17         local f = io_open(path);
  18         if not f then return; end
  19         local s = f:read("*a");
  20         f:close();
  21         return parse_xml_real(s);
  22 end
  23 local function setXml(user, host, xml)
  24         local jid = user.."@"..host;
  25         local path = paths.join(prosody.paths.data, jid..".xml");
  26         local f, err = io_open(path, "w");
  27         if not f then return f, err; end
  28         if xml then
  29                 local s = tostring(xml);
  30                 f:write(s);
  31                 f:close();
  32                 return true;
  33         else
  34                 f:close();
  35                 return os_remove(path);
  36         end
  37 end
  38 local function getUserElement(xml)
  39         if xml and xml.name == "server-data" then
  40                 local host = xml.tags[1];
  41                 if host and host.name == "host" then
  42                         local user = host.tags[1];
  43                         if user and user.name == "user" then
  44                                 return user;
  45                         end
  46                 end
  47         end
  48 end
  49 local function createOuterXml(user, host)
  50         return st.stanza("server-data", {xmlns='urn:xmpp:pie:0'})
  51                 :tag("host", {jid=host})
  52                         :tag("user", {name = user});
  53 end
  54 local function removeFromArray(array, value)
  55         for i,item in ipairs(array) do
  56                 if item == value then
  57                         t_remove(array, i);
  58                         return;
  59                 end
  60         end
  61 end
  62 local function removeStanzaChild(s, child)
  63         removeFromArray(s.tags, child);
  64         removeFromArray(s, child);
  65 end
  66
  67 local handlers = {};
  68
  69 -- In order to support mod_auth_internal_hashed
  70 local extended = "http://prosody.im/protocol/extended-xep0227\1";
  71
  72 handlers.accounts = {
  73         get = function(self, user)
  74                 user = getUserElement(getXml(user, self.host));
  75                 if user and user.attr.password then
  76                         return { password = user.attr.password };
  77                 elseif user then
  78                         local data = {};
  79                         for k, v in pairs(user.attr) do
  80                                 if k:sub(1, #extended) == extended then
  81                                         data[k:sub(#extended+1)] = v;
  82                                 end
  83                         end
  84                         return data;
  85                 end
  86         end;
  87         set = function(self, user, data)
  88                 if data then
  89                         local xml = getXml(user, self.host);
  90                         if not xml then xml = createOuterXml(user, self.host); end
  91                         local usere = getUserElement(xml);
  92                         for k, v in pairs(data) do
  93                                 if k == "password" then
  94                                         usere.attr.password = v;
  95                                 else
  96                                         usere.attr[extended..k] = v;
  97                                 end
  98                         end
  99                         return setXml(user, self.host, xml);
 100                 else
 101                         return setXml(user, self.host, nil);
 102                 end
 103         end;
 104 };
 105 handlers.vcard = {
 106         get = function(self, user)
 107                 user = getUserElement(getXml(user, self.host));
 108                 if user then
 109                         local vcard = user:get_child("vCard", 'vcard-temp');
 110                         if vcard then
 111                                 return st.preserialize(vcard);
 112                         end
 113                 end
 114         end;
 115         set = function(self, user, data)
 116                 local xml = getXml(user, self.host);
 117                 local usere = xml and getUserElement(xml);
 118                 if usere then
 119                         local vcard = usere:get_child("vCard", 'vcard-temp');
 120                         if vcard then
 121                                 removeStanzaChild(usere, vcard);
 122                         elseif not data then
 123                                 return true;
 124                         end
 125                         if data then
 126                                 vcard = st.deserialize(data);
 127                                 usere:add_child(vcard);
 128                         end
 129                         return setXml(user, self.host, xml);
 130                 end
 131                 return true;
 132         end;
 133 };
 134 handlers.private = {
 135         get = function(self, user)
 136                 user = getUserElement(getXml(user, self.host));
 137                 if user then
 138                         local private = user:get_child("query", "jabber:iq:private");
 139                         if private then
 140                                 local r = {};
 141                                 for _, tag in ipairs(private.tags) do
 142                                         r[tag.name..":"..tag.attr.xmlns] = st.preserialize(tag);
 143                                 end
 144                                 return r;
 145                         end
 146                 end
 147         end;
 148         set = function(self, user, data)
 149                 local xml = getXml(user, self.host);
 150                 local usere = xml and getUserElement(xml);
 151                 if usere then
 152                         local private = usere:get_child("query", 'jabber:iq:private');
 153                         if private then removeStanzaChild(usere, private); end
 154                         if data and next(data) ~= nil then
 155                                 private = st.stanza("query", {xmlns='jabber:iq:private'});
 156                                 for _,tag in pairs(data) do
 157                                         private:add_child(st.deserialize(tag));
 158                                 end
 159                                 usere:add_child(private);
 160                         end
 161                         return setXml(user, self.host, xml);
 162                 end
 163                 return true;
 164         end;
 165 };
 166
 167 -----------------------------
 168 local driver = {};
 169
 170 function driver:open(datastore, typ)
 171         local handler = handlers[datastore];
 172         if not handler then return nil, "unsupported-datastore"; end
 173         local instance = setmetatable({ host = module.host; datastore = datastore; }, { __index = handler });
 174         if instance.init then instance:init(); end
 175         return instance;
 176 end
 177
 178 module:provides("storage", driver);