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annotate mod_email/mod_email.lua @ 4651:8231774f5bfd

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mod_cloud_notify_encrypted: Ensure body substring remains valid UTF-8 The `body:sub()` call risks splitting the string in the middle of a multi-byte UTF-8 sequence. This should have been caught by util.stanza validation, but that would have caused some havoc, at the very least causing the notification to not be sent. There have been no reports of this happening. Likely because this module isn't widely deployed among users with languages that use many longer UTF-8 sequences. The util.encodings.utf8.valid() function is O(n) where only the last sequence really needs to be checked, but it's in C and expected to be fast.
author Kim Alvefur <zash@zash.se>
date Sun, 22 Aug 2021 13:22:59 +0200
parents 070faeaf51bc
children
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1 module:set_global();
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2
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3 local moduleapi = require "core.moduleapi";
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4
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5 local smtp = require"socket.smtp";
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6
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7 local config = module:get_option("smtp", { origin = "prosody", exec = "sendmail" });
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8
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9 local function send_email(to, headers, content)
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10 if type(headers) == "string" then -- subject
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11 headers = {
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12 Subject = headers;
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13 From = config.origin;
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14 };
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15 end
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16 headers.To = to;
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17 if not headers["Content-Type"] then
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18 headers["Content-Type"] = 'text/plain; charset="utf-8"';
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19 end
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20 local message = smtp.message{
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21 headers = headers;
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22 body = content;
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23 };
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24
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25 if config.exec then
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26 local pipe = io.popen(config.exec ..
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27 " '"..to:gsub("'", "'\\''").."'", "w");
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28
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29 for str in message do
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30 pipe:write(str);
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31 end
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32
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33 return pipe:close();
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34 end
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35
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36 return smtp.send({
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37 user = config.user; password = config.password;
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38 server = config.server; port = config.port;
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39 domain = config.domain;
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40
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41 from = config.origin; rcpt = to;
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42 source = message;
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43 });
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44 end
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45
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46 assert(not moduleapi.send_email, "another email module is already loaded");
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47 function moduleapi:send_email(email) --luacheck: ignore 212/self
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48 return send_email(email.to, email.headers or email.subject, email.body);
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49 end