Software / code / prosody
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util/caps.lua @ 9774:4f8b6c09e5f3 0.11 0.11.2
Merge 0.10->0.11
| author | Matthew Wild <mwild1@gmail.com> |
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| date | Mon, 07 Jan 2019 15:34:23 +0000 |
| parent | 8555:4f0f5b49bb03 |
| child | 12975:d10957394a3c |
| 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 local _ENV = nil; |
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16 -- luacheck: std none |
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17 |
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18 local function calculate_hash(disco_info) |
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19 local identities, features, extensions = {}, {}, {}; |
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20 for _, tag in ipairs(disco_info) do |
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21 if tag.name == "identity" then |
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22 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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23 elseif tag.name == "feature" then |
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24 t_insert(features, tag.attr.var or ""); |
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25 elseif tag.name == "x" and tag.attr.xmlns == "jabber:x:data" then |
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26 local form = {}; |
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27 local FORM_TYPE; |
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28 for _, field in ipairs(tag.tags) do |
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29 if field.name == "field" and field.attr.var then |
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30 local values = {}; |
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31 for _, val in ipairs(field.tags) do |
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32 val = #val.tags == 0 and val:get_text(); |
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33 if val then t_insert(values, val); end |
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34 end |
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35 t_sort(values); |
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36 if field.attr.var == "FORM_TYPE" then |
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37 FORM_TYPE = values[1]; |
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38 elseif #values > 0 then |
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39 t_insert(form, field.attr.var.."\0"..t_concat(values, "<")); |
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40 else |
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41 t_insert(form, field.attr.var); |
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42 end |
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43 end |
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44 end |
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45 t_sort(form); |
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46 form = t_concat(form, "<"); |
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47 if FORM_TYPE then form = FORM_TYPE.."\0"..form; end |
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48 t_insert(extensions, form); |
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49 end |
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50 end |
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51 t_sort(identities); |
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52 t_sort(features); |
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53 t_sort(extensions); |
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54 if #identities > 0 then identities = t_concat(identities, "<"):gsub("%z", "/").."<"; else identities = ""; end |
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55 if #features > 0 then features = t_concat(features, "<").."<"; else features = ""; end |
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56 if #extensions > 0 then extensions = t_concat(extensions, "<"):gsub("%z", "<").."<"; else extensions = ""; end |
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57 local S = identities..features..extensions; |
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58 local ver = base64(sha1(S)); |
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59 return ver, S; |
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60 end |
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61 |
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62 return { |
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63 calculate_hash = calculate_hash; |
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64 }; |
