view mod_storage_ldap/mod_storage_ldap.lua @ 4976:75b6e5df65f9

various: Improve error reporting if missing file server module on 0.12 If there is some error loading net.http.files then it would be swallowed by the pcall and then it would proceed to trying mod_http_files, which might cause unexpected behavior on 0.12 Ref #1765
author Kim Alvefur <zash@zash.se>
date Mon, 18 Jul 2022 22:47:54 +0200
parents e099586f9de5
children
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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 typ == nil or typ == "keyval" then
        return adapter;
    end
    return nil, "unsupported-store";
end
module:provides("storage", driver);