prosody-modules
b63f236a378f
mod_strict_https/mod_strict_https.lua

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mod_strict_https/mod_strict_https.lua @ 2905:b63f236a378f

luacheckrc: Assign module.environment to section for writable globals
author Kim Alvefur <zash@zash.se>
date Wed, 07 Mar 2018 18:11:50 +0100
parent 863:efa9c1676d1f
child 5411:b3158647cb36
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1b34c8e46ffb mod_strict_https: New module implementing HTTP Strict Transport Security
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1 -- HTTP Strict Transport Security
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2 -- https://tools.ietf.org/html/rfc6797
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3
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4 module:set_global();
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5
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6 local http_server = require "net.http.server";
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7
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efa9c1676d1f mod_strict_https: Correct underscore to hypen in max-age directive
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8 local hsts_header = module:get_option_string("hsts_header", "max-age=31556952"); -- This means "Don't even try to access without HTTPS for a year"
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9
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10 local _old_send_response;
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11 local _old_fire_event;
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12
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13 local modules = {};
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14
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15 function module.load()
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16 _old_send_response = http_server.send_response;
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17 function http_server.send_response(response, body)
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18 response.headers.strict_transport_security = hsts_header;
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19 return _old_send_response(response, body);
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20 end
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21
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22 _old_fire_event = http_server._events.fire_event;
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23 function http_server._events.fire_event(event, payload)
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24 local request = payload.request;
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25 local host = event:match("^[A-Z]+ ([^/]+)");
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26 local module = modules[host];
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27 if module and not request.secure then
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28 payload.response.headers.location = module:http_url(request.path);
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29 return 301;
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30 end
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31 return _old_fire_event(event, payload);
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32 end
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33 end
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34 function module.unload()
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35 http_server.send_response = _old_send_response;
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36 http_server._events.fire_event = _old_fire_event;
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37 end
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38 function module.add_host(module)
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39 local http_host = module:get_option_string("http_host", module.host);
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40 modules[http_host] = module;
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41 function module.unload()
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42 modules[http_host] = nil;
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43 end
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44 end