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util/caps.lua @ 4181:2f4496f46da2
util.pluginloader: Return file path on success in pluginloader.load_code().
author | Waqas Hussain <waqas20@gmail.com> |
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date | Sun, 20 Feb 2011 20:03:43 +0500 |
parent | 3342:20e99763a08a |
child | 5776:bd0ff8ae98a8 |
rev | line source |
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1 -- Prosody IM |
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2 -- Copyright (C) 2008-2010 Matthew Wild |
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3 -- Copyright (C) 2008-2010 Waqas Hussain |
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4 -- |
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5 -- This project is MIT/X11 licensed. Please see the |
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6 -- COPYING file in the source package for more information. |
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7 -- |
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8 |
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9 local base64 = require "util.encodings".base64.encode; |
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10 local sha1 = require "util.hashes".sha1; |
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11 |
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12 local t_insert, t_sort, t_concat = table.insert, table.sort, table.concat; |
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13 local ipairs = ipairs; |
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14 |
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15 module "caps" |
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16 |
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17 function calculate_hash(disco_info) |
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18 local identities, features, extensions = {}, {}, {}; |
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19 for _, tag in ipairs(disco_info) do |
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20 if tag.name == "identity" then |
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21 t_insert(identities, (tag.attr.category or "").."\0"..(tag.attr.type or "").."\0"..(tag.attr["xml:lang"] or "").."\0"..(tag.attr.name or "")); |
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22 elseif tag.name == "feature" then |
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23 t_insert(features, tag.attr.var or ""); |
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24 elseif tag.name == "x" and tag.attr.xmlns == "jabber:x:data" then |
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25 local form = {}; |
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26 local FORM_TYPE; |
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27 for _, field in ipairs(tag.tags) do |
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28 if field.name == "field" and field.attr.var then |
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29 local values = {}; |
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30 for _, val in ipairs(field.tags) do |
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31 val = #val.tags == 0 and val:get_text(); |
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32 if val then t_insert(values, val); end |
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33 end |
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34 t_sort(values); |
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35 if field.attr.var == "FORM_TYPE" then |
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36 FORM_TYPE = values[1]; |
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37 elseif #values > 0 then |
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38 t_insert(form, field.attr.var.."\0"..t_concat(values, "<")); |
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39 else |
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40 t_insert(form, field.attr.var); |
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41 end |
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42 end |
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43 end |
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44 t_sort(form); |
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45 form = t_concat(form, "<"); |
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46 if FORM_TYPE then form = FORM_TYPE.."\0"..form; end |
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47 t_insert(extensions, form); |
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48 end |
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49 end |
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50 t_sort(identities); |
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51 t_sort(features); |
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52 t_sort(extensions); |
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53 if #identities > 0 then identities = t_concat(identities, "<"):gsub("%z", "/").."<"; else identities = ""; end |
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54 if #features > 0 then features = t_concat(features, "<").."<"; else features = ""; end |
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55 if #extensions > 0 then extensions = t_concat(extensions, "<"):gsub("%z", "<").."<"; else extensions = ""; end |
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56 local S = identities..features..extensions; |
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57 local ver = base64(sha1(S)); |
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58 return ver, S; |
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59 end |
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60 |
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61 return _M; |