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mod_log_slow_events/mod_log_slow_events.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 |
parent | 2850:3ba8fd1a297e |
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module:set_global(); local time = require "socket".gettime; local base64_decode = require "util.encodings".base64.decode; local max_seconds = module:get_option_number("log_slow_events_threshold", 0.5); local measure_slow_event = module:measure("slow_events", "rate"); function event_wrapper(handlers, event_name, event_data) local start = time(); local ret = handlers(event_name, event_data); local duration = time()-start; if duration > max_seconds then local data = {}; if event_data then local function log_data(name, value) if value then table.insert(data, ("%s=%q"):format(name, value)); return true; end end local sess = event_data.origin or event_data.session; if sess then log_data("ip", sess.ip); if not log_data("full_jid", sess.full_jid) then log_data("username", sess.username); end log_data("type", sess.type); log_data("host", sess.host); end local stanza = event_data.stanza; if stanza then log_data("stanza", tostring(stanza)); else local request = event_data.request; if request then log_data("http_method", request.method); log_data("http_path", request.path); local auth = request.headers.authorization; if auth then local creds = auth:match("^Basic +(.+)$"); if creds then local user = string.match(base64_decode(creds) or "", "^([^:]+):"); log_data("http_user", user); end end end end end measure_slow_event(); module:log("warn", "Slow event '%s' took %0.2fs: %s", event_name, duration, next(data) and table.concat(data, ", ") or "no recognised data"); end return ret; end local http_events = require "net.http.server"._events; module:wrap_object_event(http_events, false, event_wrapper); module:wrap_event(false, event_wrapper); function module.add_host(module) module:wrap_event(false, event_wrapper); end