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mod_storage_ldap.lua
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mod_storage_ldap.lua
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-- vim:sts=4 sw=4
-- Prosody IM
-- Copyright (C) 2008-2010 Matthew Wild
-- Copyright (C) 2008-2010 Waqas Hussain
-- Copyright (C) 2012 Rob Hoelz
--
-- This project is MIT/X11 licensed. Please see the
-- COPYING file in the source package for more information.
--
----------------------------------------
-- Constants and such --
----------------------------------------
local setmetatable = setmetatable;
local ldap = module:require 'ldap';
local vcardlib = module:require 'ldap/vcard';
local st = require 'util.stanza';
local gettime = require 'socket'.gettime;
if not ldap then
return;
end
local CACHE_EXPIRY = 300;
local params = module:get_option('ldap');
----------------------------------------
-- Utility Functions --
----------------------------------------
local function ldap_record_to_vcard(record)
return vcardlib.create {
record = record,
format = params.vcard_format,
}
end
local get_alias_for_user;
do
local user_cache;
local last_fetch_time;
local function populate_user_cache()
local ld = ldap.getconnection();
local usernamefield = params.user.usernamefield;
local namefield = params.user.namefield;
user_cache = {};
for _, attrs in ld:search { base = params.user.basedn, scope = 'onelevel', filter = params.user.filter } do
user_cache[attrs[usernamefield]] = attrs[namefield];
end
last_fetch_time = gettime();
end
function get_alias_for_user(user)
if last_fetch_time and last_fetch_time + CACHE_EXPIRY < gettime() then
user_cache = nil;
end
if not user_cache then
populate_user_cache();
end
return user_cache[user];
end
end
----------------------------------------
-- General Setup --
----------------------------------------
local ldap_store = {};
ldap_store.__index = ldap_store;
local adapters = {
roster = {},
vcard = {},
}
for k, v in pairs(adapters) do
setmetatable(v, ldap_store);
v.__index = v;
v.name = k;
end
function ldap_store:get(username)
return nil, "get method unimplemented on store '" .. tostring(self.name) .. "'"
end
function ldap_store:set(username, data)
return nil, "LDAP storage is currently read-only";
end
----------------------------------------
-- Roster Storage Implementation --
----------------------------------------
function adapters.roster:get(username)
local ld = ldap.getconnection();
local contacts = {};
local memberfield = params.groups.memberfield;
local namefield = params.groups.namefield;
local filter = memberfield .. '=' .. tostring(username);
local groups = {};
for _, config in ipairs(params.groups) do
groups[ config[namefield] ] = config.name;
end
-- XXX this kind of relies on the way we do groups at INOC
for _, attrs in ld:search { base = params.groups.basedn, scope = 'onelevel', filter = filter } do
if groups[ attrs[namefield] ] then
local members = attrs[memberfield];
for _, user in ipairs(members) do
if user ~= username then
local jid = user .. '@' .. module.host;
local record = contacts[jid];
if not record then
record = {
subscription = 'both',
groups = {},
name = get_alias_for_user(user),
};
contacts[jid] = record;
end
record.groups[ groups[ attrs[namefield] ] ] = true;
end
end
end
end
return contacts;
end
----------------------------------------
-- vCard Storage Implementation --
----------------------------------------
function adapters.vcard:get(username)
if not params.vcard_format then
return nil, '';
end
local ld = ldap.getconnection();
local filter = params.user.usernamefield .. '=' .. tostring(username);
local match = ldap.singlematch {
base = params.user.basedn,
filter = filter,
};
if match then
match.jid = username .. '@' .. module.host
return st.preserialize(ldap_record_to_vcard(match));
else
return nil, 'not found';
end
end
----------------------------------------
-- Driver Definition --
----------------------------------------
local driver = {};
function driver:open(store, typ)
local adapter = adapters[store];
if adapter and not typ then
return adapter;
end
return nil, "unsupported-store";
end
module:provides("storage", driver);