fun w/ Bash

batch rename awk one-liner

# construct shell commands, then pass them to the shell interpreter
ls Life\ -\ S02E* | awk '// {print "mv" , "\"" $0  "\"" , "life__" $3 "--[0000]hdtv[eng]-" $5}' | sh

batch rename ; awk one-liner

# construct shell commands, then pass them to the shell interpreter
ls Life\ -\ S02E* | awk '// {print "mv" , "\"" $0  "\"" , "life__" $3 "--[0000]hdtv[eng]-" $5}' | sh

curl-thru-vip.sh

#!/bin/bash
#NAME: curl-thru-vip.sh
#PUPOSE: test vhost by vip member
#NB: this method pre-supposes network access to vip members, otherwise it's useless
#REF: http://drewish.com/content/2010/03/using_curl_and_the_host_header_to_bypass_a_load_balancer


read -r -d msg_usage <<-EOF
	usage: $0 target_url ip1 [ip2...]
	entered: $0 $target_url ${members[@]}
	EOF

init_opts=("$@")
target_url="$1"
shift && members=("$@")

curl_cmd="$(which curl)"
curl_opt=" --verbose --insecure "

err_usage(){
    exitcode=$1
    echo "$msg_usage"
    exit $exitcode
}

parse_url(){
    local url2parse="$1"
    url_prefix="$(echo $url2parse | cut -d/ -f1-2)"
    url_hostdomain="$(echo $url2parse | cut -d/ -f3)"
    url_port="$(echo $url2parse | cut -d: -f3 | cut -d/ -f1)"
    if [[ ! -z "$url_port" ]] ;then
	#if string is not empty
	url_port=":${url_port}"
    fi	
    url_postfix="$(echo $url2parse | cut -d/ -f4-)"
}

main(){
    q="'"
    parse_url "$target_url"

    echo "#INFO: $url_hostdomain resolves to $(nslookup ${url_hostdomain})"
    curl_opt="$curl_opt --header ${q}Host: $url_hostdomain ${q}"

    cmd_load=()
    for ip2test in "${members[@]}" ;do
	curl_target="${url_prefix}/${ip2test}${url_port}/${url_postfix}"
	cmd_load+=("$curl_cmd $curl_opt $curl_target")
	#echo "$curl_cmd $curl_opt $curl_target"
    done

    cmd_log=()
    cmd_logparse="gawk '/HTTP/{print}'"
    for cmd in "${cmd_load[@]}" ;do
	cmd_log+=("$($cmd 2>&1)")
	local count="$(( ${#cmd_log[@]} - 1 ))"

	local cmd_resultcode="$(echo ${cmd_log[$count]} | $cmd_logparse )"
	echo "$url_hostdomain $count :!: $cmd_resultcode :!: $cmd"
    done
}

startOk(){
    if [[ ! -z "$target_url" ]] && [[ ! -z "${member[1]}" ]] ;then
	err_usage 1 "err: $target_url " "${member[@]}"
    else
	return 0
    fi
}

if startOk ;then
    main
fi

flush local cache to remote storage

# open/monitor in new screen window
# 3600 is 10hrs , better options: plug into cron a/o git-annex
#NB: may fail at dest w/ multiple simultaneous uploads
watch -n 3600 rsync -avxhP --remove-source-files . sheva.lan:/home/khaije/documents/multimedia/.

youtube_dl.sh

#!/bin/bash 

#NB: no spaces on either side during assignment
#NB: quote variables to catch 'multi-word' assignments, else only first 'word' is assigned
#NB: statically assign any interesting 'contextual' variables, these are mutable during normal operations 
argnum="$#"
basename="$0"
url="$1"
savename="$2"

#NB: include space on either side of function name
function showMsg {
    echo "$*"
}
function errUsage {
    showMsg "usage error: script expects exactly 2 args, $varnum provided."
    showMsg "example: $basename youtube_url \{savename.flv\}"
}
function getSavename {
    if [[ ! $savename ]];then
	savename=$( awk 'BEGIN{FS="="}{print $2 ".flv"}' <<< $url  )
	showMsg "save_name not provided, using $savename "
	return 0
    else 
	errUsage
	return 1
    fi
}
function validInit {
    if [[ $argnum == 2 ]]; then
	return 0
    elif [[ $argnum == 1 ]] && getSavename ; then 
	return 0
    fi

    errUsage 
    return 1
}
function main {
    showMsg "downloading $url to $savename ..."
    wget $url -qO- | sed -n "/fmt_url_map/{s/[\'\"\|]/\n/g;p}" \
	| sed -n '/^fmt_url_map/,/videoplayback/p' \
	| sed -e :a -e '$q;N;5,$D;ba' \
	| tr -d '\n' | sed -e 's/\(.*\),\(.\)\{1,3\}/\1/' \
	| wget -i - -O $savename
}

# main
if validInit ; then 
    main
fi