99 lines
2.7 KiB
Plaintext
99 lines
2.7 KiB
Plaintext
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#!/bin/bash
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# Following regex is based on https://tools.ietf.org/html/rfc3986#appendix-B with
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# additional sub-expressions to split authority into userinfo, host and port
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#
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readonly URI_REGEX='^(([^:/?#]+):)?(//((([^:/?#]+)?(:([^:/?#]+))?@)?([^:/?#]+)(:([0-9]+))?))(/([^?#]*))?(\?([^#]*))?(#(.*))?'
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# ↑↑ ↑ ↑↑↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑
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# |2 scheme | ||6 userinfo passwd 7 host | 9 port | 11 rpath | 13 query | 15 fragment
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# 1 scheme: | |5 userinfo@ 8 :… 10 path 12 ?… 14 #…
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# | 4 authority
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# 3 //…
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IDX_SCHEME=2
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IDX_USER=6
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IDX_PASSWD=8
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IDX_HOST=9
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IDX_PORT=11
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IDX_PATH=12
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IDX_RPATH=13
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IDX_QUERY=15
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IDX_FRAGMENT=17
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# processing argument
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POSITIONAL=()
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while [[ $# -gt 0 ]]; do
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case "$1" in
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-s|--ssh)
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SSH="$2"
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shift
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shift
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;;
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--)
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shift
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POSITIONAL+=("$@")
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break
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;;
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*)
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POSITIONAL+=("$1")
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shift
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;;
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esac
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done
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set -- "${POSITIONAL[@]}"
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# check arguments
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if [[ $# == 0 ]]; then
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echo "Usage: $0 [-s|--ssh SSH_DESTINATION] <REDIS_URI> [...REDIS_CLI_ARGS]"
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echo " -s, --ssh for ssh tunnel"
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echo " REDIS_URI redis://:passwd@host:port/db"
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exit -1
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fi
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# pop the REDIS_URI and process it
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if [[ ! ($1 =~ $URI_REGEX) ]]; then
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echo "Invalid redis uri"
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exit -1
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fi
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shift
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SCHEME=${BASH_REMATCH[$IDX_SCHEME]}
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USER=${BASH_REMATCH[$IDX_USER]}
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PASSWD=${BASH_REMATCH[$IDX_PASSWD]}
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HOST=${BASH_REMATCH[$IDX_HOST]}
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PORT=${BASH_REMATCH[$IDX_PORT]}
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UPATH=${BASH_REMATCH[$IDX_PATH]}
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RPATH=${BASH_REMATCH[$IDX_RPATH]}
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QUERY=${BASH_REMATCH[$IDX_QUERY]}
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FRAGMENT=${BASH_REMATCH[$IDX_FRAGMENT]}
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# create ssh tunnel if `--ssh` is assigned
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is-port-used() {
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lsof -i -P -n | awk '{print $9}' | grep -F ":$1" >/dev/null
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}
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if [[ -n $SSH ]]; then
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# find available
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read lower_port upper_port < /proc/sys/net/ipv4/ip_local_port_range
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while :; do
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for (( port = lower_port ; port <= upper_port ; port++ )); do
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! is-port-used $port && break 2
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done
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done
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# forward local port to remote destination
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ssh -N -L localhost:$port:$HOST:$PORT $SSH &
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SSH_PID=$!
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# wait until port is ready
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while ! is-port-used $port; do
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sleep 0.1
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done
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HOST=localhost
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PORT=$port
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fi
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redis-cli -h "$HOST" -p "${PORT-6379}" -a "$PASSWD" -n "${RPATH-0}" "$@"
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# clean up ssh connection
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[[ -n $SSH_PID ]] && kill -9 $SSH_PID
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