AutoDevReverseProxy/script/myssh

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#!/usr/bin/env bash
set -e
SQL_PROXY_HOST="${SQL_PROXY_HOST:-localhost}"
SSH_SQL_PROXY_HOST="sqlproxy.${SQL_PROXY_HOST}"
CONNECTION_CACHE="$HOME/.cache/sqlproxy_${SQL_PROXY_HOST}"
HELP="Usage: myssh [ls|connect]\n
SUBCOMMANDS:\n
ls: list available database hosts\n
connect: connect to a database host\n
disconnect: Quit existing ssh master session\n
\n
SYNTAX connect host [-u user] [-p password] [-c client]
"
# Detect Pipe
if ! [ -t 1 ]
then
USE_CLI=true
fi
ssh_status() {
ssh -n -O check -S "${HOME}/.ssh/controlmasters/%r@%h:%p" "${SSH_SQL_PROXY_HOST}" > /dev/null 2>&1
}
connect() {
mkdir -p "${HOME}/.ssh/controlmasters"
if ! ssh_status
then
echo "" > "${CONNECTION_CACHE}"
ssh -n -o "ControlPersist=10m" -M -S "${HOME}/.ssh/controlmasters/%r@%h:%p" "${SSH_SQL_PROXY_HOST}" q
fi
}
disconnect() {
if ssh_status
then
ssh -n -O stop -S "${HOME}/.ssh/controlmasters/%r@%h:%p" "${SSH_SQL_PROXY_HOST}" q
fi
}
# Establishes a port forward to the target host
# args:
# $1 - target ip
# $2 - target port
port_forward() {
ACTIVE_HOST=$(cat "${CONNECTION_CACHE}")
if [ -z "${ACTIVE_HOST}" ] || [ "${ACTIVE_HOST}" != "$1:$2" ]
then
if [ -n "${ACTIVE_HOST}" ]
then
ssh -n -O cancel -L "6033:${ACTIVE_HOST}" -S "${HOME}/.ssh/controlmasters/%r@%h:%p" "${SSH_SQL_PROXY_HOST}" q
fi
ssh -n -O forward -L "6033:$1:$2" -S "${HOME}/.ssh/controlmasters/%r@%h:%p" "${SSH_SQL_PROXY_HOST}"
fi
echo "$1:$2" > "${CONNECTION_CACHE}"
}
ls_hosts() {
ssh -n -S "${HOME}/.ssh/controlmasters/%r@%h:%p" "${SSH_SQL_PROXY_HOST}" ls
}
get_host() {
if [ "$1" = '' ]
then
printf 'Please specify the host to connect to.\nRun "myssh ls" to list all available hosts.\n'
exit 1
else
TARGET_HOST_DATA=$(ssh -n -S "${HOME}/.ssh/controlmasters/%r@%h:%p" "${SSH_SQL_PROXY_HOST}" "get $1")
if [ "${TARGET_HOST_DATA}" = '' ]
then
printf 'No such host: "%s"\n' "$1"
exit 1
fi
fi
}
# Checks and sets sql login variables
# args:
# $1 - sql type (mysql or psql)
# $2 - target ip
# $3 - target port
# $4 - username (optional)
# $5 - password (optional)
set_host_env() {
if [ "$1" = 'mysql' ] || [ "$1" = 'postgres' ]
then
TARGET_HOST_TYPE="$1"
else
printf 'Invalid Database type: "%s"\n' "$1"
exit 1
fi
if [[ "$2" =~ ^[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}$ ]]
then
TARGET_HOST_IP="$2"
else
printf 'Invalid Host IP "%s" given.\n' "$2"
exit 1
fi
if [[ "$3" =~ ^[0-9]+$ ]]
then
TARGET_HOST_PORT="$3"
else
printf 'Invalid Host Port "%s" given.\n' "$3"
exit 1
fi
if [ -z "${TARGET_HOST_USERNAME}" ] && [ -n "$4" ]
then
TARGET_HOST_USERNAME="$4"
fi
if [ -z "${TARGET_HOST_PASSWORD}" ] && [ -n "$5" ]
then
TARGET_HOST_PASSWORD="$5"
fi
}
# Runs the sql client for an active connection
# args:
# $1 - sql type (mysql or psql)
# $2 - username
# $3 - password
run_client() {
if [ "$1" = 'mysql' ]
then
if [ -d "/Applications/Sequel Ace.app" ] && [ "${USE_CLI}" != true ]
then
open "mysql://$2:$3@${SQL_PROXY_HOST}:6033" -a "Sequel Ace"
elif which mysql >/dev/null 2>&1
then
mysql --protocol=TCP -u "$2" -p"$3" -h "${SQL_PROXY_HOST}" -P 6033
else
SHOW_CLI_HELP=true
fi
elif [ "$1" = 'postgres' ]
then
if which psql >/dev/null 2>&1
then
psql "postgresql://$2:$3@${SQL_PROXY_HOST}:6033/postgres"
else
SHOW_CLI_HELP=true
fi
fi
if [ "${SHOW_CLI_HELP}" = true ]
then
printf 'No %s client binary found.\nYou can maually establish a connection using the following data.\n' "$1"
printf 'host:\t%s\nport:\t%s\nuser:\t%s\npassword:\t%s\n' "${SQL_PROXY_HOST}" '6033' "$2" "$3"
fi
}
MAIN_OPTION="$1"
if [ -n "$1" ]
then
shift
fi
# ensure connection
connect
case "${MAIN_OPTION}" in
ls)
ls_hosts;;
connect)
# check if host is valid
TARGET_HOST="$1"
if [ -n "$1" ]
then
shift
else
printf 'No host specified.\n'
exit 1
fi
while getopts "u:p:" o
do
case "$o" in
u) TARGET_HOST_USERNAME="$OPTARG" ;;
p) TARGET_HOST_PASSWORD="$OPTARG" ;;
c) USE_CLI=true ;;
esac
done
get_host "${TARGET_HOST}"
# Do not quote this.
set_host_env ${TARGET_HOST_DATA}
port_forward "${TARGET_HOST_IP}" "$TARGET_HOST_PORT"
if [ -n "${TARGET_HOST_USERNAME}" ] && [ -n "${TARGET_HOST_PASSWORD}" ]
then
run_client "${TARGET_HOST_TYPE}" "${TARGET_HOST_USERNAME}" "${TARGET_HOST_PASSWORD}"
fi
;;
disconnect)
disconnect;;
*)
echo -e "${HELP}";;
esac