Tue, 05 Oct 2010 18:55:17 +0100
net.dns: Add 'force' parameter to resolver:feed() to force decoding a packet even if it doesn't match an outstanding request
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util.caps: Entity capabilities hash generation (moved from mod_pep)
Matthew Wild <mwild1@gmail.com>
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1 | -- Prosody IM |
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util.caps: Entity capabilities hash generation (moved from mod_pep)
Matthew Wild <mwild1@gmail.com>
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2 | -- Copyright (C) 2008-2010 Matthew Wild |
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util.caps: Entity capabilities hash generation (moved from mod_pep)
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3 | -- Copyright (C) 2008-2010 Waqas Hussain |
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util.caps: Entity capabilities hash generation (moved from mod_pep)
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4 | -- |
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5 | -- This project is MIT/X11 licensed. Please see the |
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util.caps: Entity capabilities hash generation (moved from mod_pep)
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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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util.caps: Entity capabilities hash generation (moved from mod_pep)
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10 | local sha1 = require "util.hashes".sha1; |
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util.caps: Entity capabilities hash generation (moved from mod_pep)
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11 | |
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util.caps: Entity capabilities hash generation (moved from mod_pep)
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12 | local t_insert, t_sort, t_concat = table.insert, table.sort, table.concat; |
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util.caps: Entity capabilities hash generation (moved from mod_pep)
Matthew Wild <mwild1@gmail.com>
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13 | local ipairs = ipairs; |
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util.caps: Entity capabilities hash generation (moved from mod_pep)
Matthew Wild <mwild1@gmail.com>
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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; |