清华大佬耗费三个月吐血整理的几百G的资源，免费分享！....>>>

#!/bin/sh
url=$1/
sltime=$2
if [ [$1] == [""] ];then
	echo "1.use like this:$0 url"
	echo "2.use like this:$0 url timeout"
	echo "3.use like this:$0 url timeout timewait"
elif [ [$2] != [""] ];then
        for((i=0;i<sltime;i++));
        do
		sleep 1s
		result=`curl -I -m 10 -o /dev/null -s -w %{http_code} $url`
		if [ $result -eq 200 ] || [ $result -eq 302 ] ;then
			break;
		fi
        done
else
        result=`curl -I -m 10 -o /dev/null -s -w %{http_code} $url`
fi
if [ [$3] != [""] ];then
        sleep $3
fi
echo $result