prosody
43328166dcf1
util/xml.lua

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util/xml.lua @ 7111:43328166dcf1

CHANGES: Add some things trunk has over 0.10 (probably lots missing)
author Kim Alvefur <zash@zash.se>
date Thu, 28 Jan 2016 14:17:45 +0100
parent 6978:30c96a5db360
child 7239:c9af793b2d8f
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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 local namespaces = {}
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18 function handler:StartNamespaceDecl(prefix, url)
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19 if prefix ~= nil then
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20 namespaces[prefix] = url
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21 end
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22 end
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23 function handler:EndNamespaceDecl(prefix)
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24 if prefix ~= nil then
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25 namespaces[prefix] = nil
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26 end
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27 end
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28 function handler:StartElement(tagname, attr)
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29 local curr_ns,name = tagname:match(ns_pattern);
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30 if name == "" then
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31 curr_ns, name = "", curr_ns;
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32 end
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33 if curr_ns ~= "" then
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34 attr.xmlns = curr_ns;
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35 end
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36 for i=1,#attr do
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37 local k = attr[i];
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38 attr[i] = nil;
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39 local ns, nm = k:match(ns_pattern);
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40 if nm ~= "" then
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41 ns = ns_prefixes[ns];
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42 if ns then
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43 attr[ns..":"..nm] = attr[k];
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44 attr[k] = nil;
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45 end
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46 end
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47 end
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48 local n = {}
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49 for prefix, url in pairs(namespaces) do
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50 n[prefix] = url
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51 end
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52 stanza:tag(name, attr, n);
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53 end
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54 function handler:CharacterData(data)
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55 stanza:text(data);
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56 end
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57 function handler:EndElement()
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58 stanza:up();
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59 end
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60 local parser = lxp.new(handler, "\1");
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61 local ok, err, line, col = parser:parse(xml);
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62 if ok then ok, err, line, col = parser:parse(); end
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63 --parser:close();
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64 if ok then
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65 return stanza.tags[1];
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66 else
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67 return ok, err.." (line "..line..", col "..col..")";
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68 end
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69 end;
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70 end)();
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71
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72 return {
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73 parse = parse_xml;
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74 };