Mercurial > prosody-modules
view mod_log_json/mod_log_json.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 | 4356088ad675 |
children | 807007913f67 |
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local pack = require "util.table".pack; local json = require "util.json"; local array = require "util.array"; local datetime = require "util.datetime".datetime; local socket = require "socket"; module:set_global(); local function sink_maker(config) local send = function () end if config.filename then local logfile = io.open(config.filename, "a+"); logfile:setvbuf("no"); function send(payload) logfile:write(payload, "\n"); end elseif config.udp_host and config.udp_port then local conn = socket.udp(); conn:setpeername(config.udp_host, config.udp_port); function send(payload) conn:send(payload); end end local format = require "util.format".format; local do_format = config.formatted_as or false; return function (source, level, message, ...) local args = pack(...); for i = 1, args.n do if args[i] == nil then args[i] = json.null; elseif type(args[i]) ~= "string" or type(args[i]) ~= "number" then args[i] = tostring(args[i]); end end args.n = nil; local payload = { datetime = datetime(), source = source, level = level, message = message, args = array(args); }; if do_format then payload[do_format] = format(message, ...) end send(json.encode(payload)); end end function module.unload() -- deregister require"core.loggingmanager".register_sink_type("json", nil); end require"core.loggingmanager".register_sink_type("json", sink_maker);