Question

我想阅读一个互联网文件的'Content-Length'。为此，我使用cURL来检索标题

OUTPUT=`curl -I $URL`

HTTP/1.1 200 OK
Date: Sun, 12 Jan 2014 00:41:11 GMT
Server: Apache/2.2.15 (Red Hat)
Last-Modified: Sun, 05 Jan 2014 09:41:44 GMT
Accept-Ranges: bytes
Content-Length: 553648128
Content-Type: application/octet-stream

但是，当我尝试打印$ OUTPUT时，我只得到最后一行。

Answer 1

OUTPUT=$(curl -I $URL | grep 'Content-Length')

Answer 2

的bash

curl -I $url | while read -r response
do 
  case "$response" in
    *Content-Length* )
       echo "==> $response"
    ;;
  esac
done

读取命令的输出（多行）

2 个答案: