4 ms·
Since now, multiple concurrent connections will work after my patch. (Need to add subshell) i will need to consider using fd as output cache. Instead of tempora
by dzove855 5y ago
Since now, multiple concurrent connections will work after my patch. (Need to add subshell) i will need to consider using fd as output cache. Instead of temporary files.
- Klasiaster 5y agoThis here is a simple echo server that uses tr to uppercase: exec {checkfd}>/dev/null CHECKFDPATH="/proc/$$/fd/${checkfd}" (while [ -e "$CHECKFDPATH" ]; do sleep 1; done) > >(true) & STDINPID="$!" WRITER="/proc/$STDINPID/fd/1" while IFS= read -r LINE; do # only echo lines if we didn't close the connection yet if [ -e "$CHECKFDPATH" ]; then echo "$LINE" | tr '[:lower:]' '[:upper:]' > "$WRITER" if [ "$LINE" = "bye" ]; then exec {checkfd}<&- fi else echo "received while closed: $LINE" fi done < <(nc -q 1 -l 8080 < "$WRITER") if [ -e "$CHECKFDPATH" ]; then # close checkfd to close writer pipe exec {checkfd}<&- fi
- Klasiaster 5y agoThis variant here works a bit different: exec {checkfd}>/dev/null CHECKFDPATH="/proc/$$/fd/${checkfd}" (while [ -e "$CHECKFDPATH" ]; do sleep 1; done) > >(true) & STDINPID="$!" disown "$STDINPID" READER="/proc/$STDINPID/fd/1" { while IFS= read -r LINE; do echo "$LINE" | tr '[:lower:]' '[:upper:]' if [ "$LINE" = "bye" ]; then echo exiting > /dev/stderr break fi done < "$READER" ; kill -9 "$STDINPID" 2>/dev/null || true ; } | { nc -q 1 -l 8080 > "$READER" ; kill -9 "$STDINPID" 2>/dev/null || true ; } exec {checkfd}<&-
- dzove855 5y agoNo need of tr here in your example. The fd will only be used to stor it temporary since, we first need to sent headers, and the headers need to be sent before the bofy. The server base os working fine now with accept and a patch request os already sent to bash. So probaböy on the next release accept will be full usable.