author | Kim Alvefur <zash@zash.se> |
Sat, 07 Nov 2020 21:39:36 +0100 | |
changeset 11643 | ad39528e647d |
parent 8558 | 4f0f5b49bb03 |
child 12979 | d10957394a3c |
permissions | -rw-r--r-- |
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-- Prosody IM |
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-- Copyright (C) 2008-2010 Matthew Wild |
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-- Copyright (C) 2008-2010 Waqas Hussain |
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Remove all trailing whitespace
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-- |
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-- This project is MIT/X11 licensed. Please see the |
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-- COPYING file in the source package for more information. |
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-- |
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local base64 = require "util.encodings".base64.encode; |
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local sha1 = require "util.hashes".sha1; |
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|
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local t_insert, t_sort, t_concat = table.insert, table.sort, table.concat; |
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local ipairs = ipairs; |
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local _ENV = nil; |
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vairious: Add annotation when an empty environment is set [luacheck]
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-- luacheck: std none |
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|
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local function calculate_hash(disco_info) |
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local identities, features, extensions = {}, {}, {}; |
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for _, tag in ipairs(disco_info) do |
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if tag.name == "identity" then |
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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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elseif tag.name == "feature" then |
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t_insert(features, tag.attr.var or ""); |
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elseif tag.name == "x" and tag.attr.xmlns == "jabber:x:data" then |
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local form = {}; |
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local FORM_TYPE; |
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for _, field in ipairs(tag.tags) do |
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if field.name == "field" and field.attr.var then |
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local values = {}; |
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for _, val in ipairs(field.tags) do |
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val = #val.tags == 0 and val:get_text(); |
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if val then t_insert(values, val); end |
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end |
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t_sort(values); |
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if field.attr.var == "FORM_TYPE" then |
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FORM_TYPE = values[1]; |
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elseif #values > 0 then |
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t_insert(form, field.attr.var.."\0"..t_concat(values, "<")); |
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else |
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t_insert(form, field.attr.var); |
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end |
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end |
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end |
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t_sort(form); |
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form = t_concat(form, "<"); |
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if FORM_TYPE then form = FORM_TYPE.."\0"..form; end |
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t_insert(extensions, form); |
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end |
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end |
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t_sort(identities); |
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t_sort(features); |
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t_sort(extensions); |
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if #identities > 0 then identities = t_concat(identities, "<"):gsub("%z", "/").."<"; else identities = ""; end |
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if #features > 0 then features = t_concat(features, "<").."<"; else features = ""; end |
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if #extensions > 0 then extensions = t_concat(extensions, "<"):gsub("%z", "<").."<"; else extensions = ""; end |
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local S = identities..features..extensions; |
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local ver = base64(sha1(S)); |
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return ver, S; |
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end |
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return { |
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calculate_hash = calculate_hash; |
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}; |