prosody
20e99763a08a
util/caps.lua
Software / code / prosody
Comparison
util/caps.lua @ 3342:20e99763a08a
util.caps: Entity capabilities hash generation (moved from mod_pep)
| author | Matthew Wild <mwild1@gmail.com> |
|---|---|
| date | Fri, 09 Jul 2010 13:18:42 +0100 |
| child | 5776:bd0ff8ae98a8 |
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| 3341:a8a3e662fea7 | 3342:20e99763a08a |
|---|---|
| 1 -- Prosody IM | |
| 2 -- Copyright (C) 2008-2010 Matthew Wild | |
| 3 -- Copyright (C) 2008-2010 Waqas Hussain | |
| 4 -- | |
| 5 -- This project is MIT/X11 licensed. Please see the | |
| 6 -- COPYING file in the source package for more information. | |
| 7 -- | |
| 8 | |
| 9 local base64 = require "util.encodings".base64.encode; | |
| 10 local sha1 = require "util.hashes".sha1; | |
| 11 | |
| 12 local t_insert, t_sort, t_concat = table.insert, table.sort, table.concat; | |
| 13 local ipairs = ipairs; | |
| 14 | |
| 15 module "caps" | |
| 16 | |
| 17 function calculate_hash(disco_info) | |
| 18 local identities, features, extensions = {}, {}, {}; | |
| 19 for _, tag in ipairs(disco_info) do | |
| 20 if tag.name == "identity" then | |
| 21 t_insert(identities, (tag.attr.category or "").."\0"..(tag.attr.type or "").."\0"..(tag.attr["xml:lang"] or "").."\0"..(tag.attr.name or "")); | |
| 22 elseif tag.name == "feature" then | |
| 23 t_insert(features, tag.attr.var or ""); | |
| 24 elseif tag.name == "x" and tag.attr.xmlns == "jabber:x:data" then | |
| 25 local form = {}; | |
| 26 local FORM_TYPE; | |
| 27 for _, field in ipairs(tag.tags) do | |
| 28 if field.name == "field" and field.attr.var then | |
| 29 local values = {}; | |
| 30 for _, val in ipairs(field.tags) do | |
| 31 val = #val.tags == 0 and val:get_text(); | |
| 32 if val then t_insert(values, val); end | |
| 33 end | |
| 34 t_sort(values); | |
| 35 if field.attr.var == "FORM_TYPE" then | |
| 36 FORM_TYPE = values[1]; | |
| 37 elseif #values > 0 then | |
| 38 t_insert(form, field.attr.var.."\0"..t_concat(values, "<")); | |
| 39 else | |
| 40 t_insert(form, field.attr.var); | |
| 41 end | |
| 42 end | |
| 43 end | |
| 44 t_sort(form); | |
| 45 form = t_concat(form, "<"); | |
| 46 if FORM_TYPE then form = FORM_TYPE.."\0"..form; end | |
| 47 t_insert(extensions, form); | |
| 48 end | |
| 49 end | |
| 50 t_sort(identities); | |
| 51 t_sort(features); | |
| 52 t_sort(extensions); | |
| 53 if #identities > 0 then identities = t_concat(identities, "<"):gsub("%z", "/").."<"; else identities = ""; end | |
| 54 if #features > 0 then features = t_concat(features, "<").."<"; else features = ""; end | |
| 55 if #extensions > 0 then extensions = t_concat(extensions, "<"):gsub("%z", "<").."<"; else extensions = ""; end | |
| 56 local S = identities..features..extensions; | |
| 57 local ver = base64(sha1(S)); | |
| 58 return ver, S; | |
| 59 end | |
| 60 | |
| 61 return _M; |
