Mercurial > prosody-modules
view mod_strict_https/mod_strict_https.lua @ 4651:8231774f5bfd
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 | efa9c1676d1f |
children | b3158647cb36 |
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-- HTTP Strict Transport Security -- https://tools.ietf.org/html/rfc6797 module:set_global(); local http_server = require "net.http.server"; 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" local _old_send_response; local _old_fire_event; local modules = {}; function module.load() _old_send_response = http_server.send_response; function http_server.send_response(response, body) response.headers.strict_transport_security = hsts_header; return _old_send_response(response, body); end _old_fire_event = http_server._events.fire_event; function http_server._events.fire_event(event, payload) local request = payload.request; local host = event:match("^[A-Z]+ ([^/]+)"); local module = modules[host]; if module and not request.secure then payload.response.headers.location = module:http_url(request.path); return 301; end return _old_fire_event(event, payload); end end function module.unload() http_server.send_response = _old_send_response; http_server._events.fire_event = _old_fire_event; end function module.add_host(module) local http_host = module:get_option_string("http_host", module.host); modules[http_host] = module; function module.unload() modules[http_host] = nil; end end