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util/xml.lua

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util/xml.lua @ 8228:cda9db4b881d

loggingmanager, mod_posix: Import util.format correctly (fixes #985)
author Kim Alvefur <zash@zash.se>
date Mon, 11 Sep 2017 19:32:12 +0200
parent 6777:5de6b93d0190
child 6978:30c96a5db360
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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cc487921746b util.xml: Initial commit; exposes parse(), which is now the canonical way to convert a string to a stanza.
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1
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2 local st = require "util.stanza";
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3 local lxp = require "lxp";
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5 local _ENV = nil;
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7 local parse_xml = (function()
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8 local ns_prefixes = {
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9 ["http://www.w3.org/XML/1998/namespace"] = "xml";
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10 };
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11 local ns_separator = "\1";
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12 local ns_pattern = "^([^"..ns_separator.."]*)"..ns_separator.."?(.*)$";
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13 return function(xml)
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14 --luacheck: ignore 212/self
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15 local handler = {};
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16 local stanza = st.stanza("root");
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17 function handler:StartElement(tagname, attr)
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18 local curr_ns,name = tagname:match(ns_pattern);
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19 if name == "" then
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20 curr_ns, name = "", curr_ns;
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21 end
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22 if curr_ns ~= "" then
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23 attr.xmlns = curr_ns;
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24 end
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25 for i=1,#attr do
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26 local k = attr[i];
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27 attr[i] = nil;
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28 local ns, nm = k:match(ns_pattern);
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29 if nm ~= "" then
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30 ns = ns_prefixes[ns];
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31 if ns then
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32 attr[ns..":"..nm] = attr[k];
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33 attr[k] = nil;
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34 end
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35 end
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36 end
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37 stanza:tag(name, attr);
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38 end
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39 function handler:CharacterData(data)
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40 stanza:text(data);
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41 end
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42 function handler:EndElement()
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43 stanza:up();
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44 end
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45 local parser = lxp.new(handler, "\1");
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46 local ok, err, line, col = parser:parse(xml);
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47 if ok then ok, err, line, col = parser:parse(); end
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48 --parser:close();
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49 if ok then
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50 return stanza.tags[1];
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51 else
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52 return ok, err.." (line "..line..", col "..col..")";
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53 end
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54 end;
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55 end)();
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56
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57 return {
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58 parse = parse_xml;
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59 };