prosody-modules
bd3ff802d883
mod_latex/mod_latex.lua

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mod_latex/mod_latex.lua @ 6120:bd3ff802d883

mod_anti_spam: Fix another traceback for origin sessions without an IP This is likely to be the case for stanzas originating from local hosts, for example (so not true s2s). It should be safe to bypass the IP check for those.
author Matthew Wild <mwild1@gmail.com>
date Sat, 28 Dec 2024 21:02:08 +0000 (3 months ago)
parent 1433:df8da7e4c2bf
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 local st = require "stanza";
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2 local urlencode = require "net.http".urlencode;
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4 local xmlns_xhtmlim = "http://jabber.org/protocol/xhtml-im";
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5 local xmlns_xhtml = "http://www.w3.org/1999/xhtml";
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7 local function replace_latex(data)
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8 local origin, stanza = data.origin, data.stanza;
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9 local body = stanza:get_child_text("body");
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10 if not body or not body:match("%$%$") then
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11 return;
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12 end
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13 module:log("debug", "Replacing latex...");
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14
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15 local html = st.stanza("html", { xmlns = xmlns_xhtmlim })
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16 :tag("body", { xmlns = xmlns_xhtml });
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18 local in_latex, last_char;
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19 for snippet, up_to in body:gmatch("(.-)%$%$()") do
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20 last_char = up_to;
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21 if in_latex then
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22 -- Render latex and add image, next snippet is text
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23 in_latex = nil;
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24 html:tag("img", { src = "http://www.mathtran.org/cgi-bin/mathtran?D=2;tex="..urlencode(snippet), alt = snippet }):up();
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25 else
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26 -- Add text to HTML, next snippet is latex
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27 in_latex = true;
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28 html:tag("span"):text(snippet):up();
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30 end
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31 end
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32 if last_char < #body then
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33 html:tag("span"):text(body:sub(last_char, #body)):up();
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34 end
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36 for n, tag in ipairs(stanza.tags) do
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37 module:log("debug", "Tag: %s|%s", tag.attr.xmlns or "", tag.name or "");
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38 if tag.name == "html" and tag.attr.xmlns == xmlns_xhtmlim then
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39 stanza.tags[n] = html;
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40 for n, child in ipairs(stanza) do
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41 if child == tag then
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42 stanza[n] = html;
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43 end
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44 end
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45 return;
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46 end
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47 end
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49 stanza[#stanza+1] = html;
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50 stanza.tags[#stanza.tags+1] = html;
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51 end
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53 module:hook("message/bare", replace_latex, 30);
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54 module:hook("message/full", replace_latex, 30);