lua: Fix kennslur location path, sanitize input

conf/supervisord.conf

@@ -1,16 +0,0 @@
-[supervisord]
-loglevel=info
-nodaemon=true
-user=root
-
-[program:nginx]
-command=/usr/local/nginx/sbin/nginx -g "daemon off;"
-autostart=true
-autorestart=true
-priority=10
-stdout_events_enabled=true
-stderr_events_enabled=true
-stdout_logfile=/dev/stdout
-stdout_logfile_maxbytes=0
-stderr_logfile=/dev/stderr
-stderr_logfile_maxbytes=0

www/samkomur.lua

@@ -4,7 +4,7 @@ local function ends_with(str, ending)
   return ending == "" or str:sub(-#ending) == ending
 end
 
-local p = io.popen('ls -a "/content/kennslur"')
+local p = io.popen('ls -a "/srv/filo_web/kennslur"')
 for file in p:lines() do
   if ends_with(file, '.mp4') and not ends_with(file, 'klippt.mp4') then
     table.insert(files, file)

www/samkomur_json.lua

@@ -21,7 +21,7 @@ local function ends_with(str, ending)
   return ending == "" or str:sub(-#ending) == ending
 end
 
-local p = io.popen('ls -a "/content/kennslur"')
+local p = io.popen('ls -a "/srv/filo_web/kennslur"')
 for file in p:lines() do
   if ends_with(file, '.mp4') and not ends_with(file, 'klippt.mp4') then
     table.insert(files, file)

www/start_the_recording.lua

@@ -1,9 +1,16 @@
-if not ngx.var.arg_output then
+local arg_output = ngx.var.arg_output
+
+if not arg_output then
   ngx.say("Missing query 'output'")
   return
 end
 
-assert(io.popen("/usr/bin/ffmpeg -y -i 'rtmp://192.168.93.59:1935/live/ljosbrot live=1' -vcodec copy -acodec copy /content/kennslur/".. ngx.var.arg_output ..".mp4 </dev/null >/dev/null 2>/dev/null &"))
+if not (arg_output:gsub("[A-Za-z0-9_.]","")=="") then
+  ngx.say("Invalid query 'output'")
+  return
+end
+
+assert(io.popen("/usr/bin/ffmpeg -y -i 'rtmp://192.168.93.58:1935/live/ljosbrot live=1' -vcodec copy -acodec copy /srv/filo_web/kennslur/".. arg_output ..".mp4 </dev/null >/dev/null 2>/dev/null &"))
 ngx.say([[
 <br>
 <input type="button" value="Stodva upptoku" onclick="window.location='stop_recording.php';return false;">