Update iptv-check

code explained

iptv-check

@@ -17,8 +17,10 @@ then
 mkdir "$path/temp" >/dev/null 2>&1
 fi
 
+# Clean any files from previous run in temp folder
 rm -rf "$path/temp/*" >/dev/null 2>&1
 
+# Warning is a simple message that will display every 40 checks on streams to explain user how to quit
 warn() {
 if [[ $i -gt $wrn ]]
 then
@@ -59,6 +61,8 @@ echo -e "$yellow" "-------------------------------------"
 echo -e "$blue" "http://github.com/peterpt"
 echo -e "$yellow" "-------------------------------------"
 echo ""
+
+# checkig for wget if it is installed
 which wget > /dev/null 2>&1
       if [ "$?" -eq "1" ]; then
    echo -e "$red" "Wget Missing"
@@ -68,6 +72,8 @@ exit 1
 fi 
 }
 
+# The difference between writefile and writefile2 is that (writefile2) is to process the output from m3u files based in xml codes 
+# while function (writefile) is to process in output file the conventional m3u files without xml codes in it
 function writefile2() {
 if [[ -f "$wfile" ]]
 then
@@ -86,11 +92,15 @@ echo "$chkf" >> "$wfile"
 echo "" >> "$wfile"
 fi
 }
- 
+
+
 function writefile() {
+# checks if tool already created previously an m3u file
 if [[ -f "$wfile" ]]
 then
+#searchs for that specific url in original file and get line number
 gturlline=$(grep -n "\<$chkf\>"<$path/temp/1 | tr ":" "\n" | sed -n 1p)
+# This variavble will get the line number before the previous url (this is to get channel name)
 defline=$((gturlline-1))
 stdata=$(sed -n "$defline p"< $path/temp/1)
 echo "$stdata" >> "$wfile"
@@ -108,7 +118,10 @@ echo "" >> "$wfile"
 fi
 }
 
+# Function for m3u files with xml content
 function xmlproc() {
+
+# Find http links only and delete all the other xml codes in the file , this works with many tests i did , but it may need more filtering for m3u files with more xml funtions in it
 grep -F "http" <$path/temp/1 | sed 's/<link>//g' | sed 's/^.*http/http/' | sed 's/&amp.*|//' | sed -e 's/\(.ts\).*\(=\)/\1\2/' | sed 's/=/ /g' | sed "s~</link>~ ~g" > $path/temp/2
 srvnmb=$(wc -l "$path/temp/2" | awk '{print$1}')
 rm -rf "$path/temp/stream" >/dev/null 2>&1
@@ -171,52 +184,77 @@ echo -e "$orange" "$wfile"
 exit 1
 fi
 }	
-	
+
+# Function that will download for specific time the test stream
 function teststream() {
 wrn="0"
+# Checks if tool already created a previous m3u file
 if [[ -f "$wfile" ]]
 then
 exts="1"
 else
 exts="0"
 fi
+
+# checks if m3u file have xml content
 ckf=$(grep "<item>" <$path/temp/1)
 if  [[ ! -z "$ckf" ]]
 then
 xmlproc
 fi 
+#checks for the http links in m3u file
 glnk=$(grep -F "http" < "$path/temp/1" | sed '/EXTINF/d' | sed '/EXTM3U/d' | awk '!a[$0]++' | sed '/^$/d')
+
+#Write all the http links only to a new file so they can be checked ahead
 echo "$glnk" | tr " " "\n" > "$path/temp/2"
+# Counts how many links must be checked
 srvnmb=$(wc -l "$path/temp/2" | awk '{print$1}')
+# removes any previous temp pid files and stream captures from previous run
 rm -rf "$path/temp/stream" >/dev/null 2>&1
 rm -rf "$path/temp/pid.tmp" >/dev/null 2>&1
 echo ""
 echo -e "$red""Press CTRL+C To Stop or Abort IPTV list check"
 echo ""
+
+# Starts the stream checks
 for i in $(seq "$srvnmb")
 do
 chkf=$(sed -n "${i}p" < "$path/temp/2")
+# To avoid errors in previous filter , it checks if the link starts with http , rtmp or HTTP
 chkurl=$(echo "$chkf" | head -c 4)
 case "$chkurl" in
 http|rtmp|HTTP)
+# start the stream download with wget , creates a file with the pid from wget
 wget -q "$chkf" -O "$path/temp/stream" & echo $! > "$path/temp/pid.tmp" 
+
+# reads current wget pid
 pid=$(sed -n 1p < "$path/temp/pid.tmp")
+
+# 4 seconds is the time that wget will download the stream befores gets killed
 sleep 4 
+# checks if wget pid is still active
 rpid=$(ps -p "$pid" -o pid= | awk '{print$1}')
+
 if [[ "$rpid" == "$pid" ]]
 then
+# kills wget pid
 kill $pid
 fi
+
+# checks if downlaoded stream file it is in temp directory
 if [[ ! -f "$path/temp/stream" ]]
 then
 echo -e "$yellow" "Error reading captured file"
 else
+# checks the size of the stream file
 stsz=$(wc -c "$path/temp/stream" | awk '{print$1}')
+# In case stream file is less than 100 bytes then it is not valid
 if [[ "$stsz" -le "100" ]]
 then
 echo -e "$green" "Link:$yellow $i$green of :$yellow$srvnmb$green is$red OFF"
 else
 echo -e "$green" "Link:$yellow $i$green of :$yellow$srvnmb$green is$green ON"
+#file have more than 100 bytes , then it is a valid stream , goto write file fuction
 writefile
 fi
 fi
@@ -249,8 +287,9 @@ exit 1
 fi
 }	
 
-
+# Case user m3u file is remote (http) then run this function
 function remotef() {
+# wil download the remote m3u file to temp folder and will check its size
 wget "{$file}" -O "$path/temp/1" >/dev/null 2>&1
 flsz=$(wc -c "$path/temp/1" | awk '{print$1}')
 if [[ "$flsz" -le "10" ]]
@@ -262,6 +301,8 @@ exit 0
 fi
 teststream
 }
+
+# Local m3u file is loaded here
 function localf(){
 if [[ ! -f "$file" ]]
 then
@@ -297,15 +338,18 @@ echo -e "$yellow" "-------------------------------------"
 echo ""
 exit 1
 fi
+# If a null file name is not found then executes the script again deflecting wget errors to dev/null
 if [[ ! -f $path/null ]]
 then
 echo "0" > $path/null
 exec $sname $1 2>/dev/null
 exit 1
 fi
+# here it means that script already was loaded and restarted , so delete the null file for the next start
 rm -rf $path/null >/dev/null 2>&1
 logo
 file="$1"
+#check if user input is a remote or local file by searching for http word in the user input variable
 echo "$file" | grep "http" >/dev/null 2>&1
 if [ "$?" -eq "0" ]; then
 remotef