How can I extract meta tags from HTML in a bash/awk script?

问题

I have a working Bash script to extract title tags. I need help with an AWK field separator for extracting meta tags from HTML, like these:

<meta name="keywords" content="key1, key2, key3">

my script works to extract title, but meta name doesn't work.

#!/bin/bash
for LINE in `cat htmls.txt`

do
   echo $LINE
   awk 'BEGIN{IGNORECASE=1;FS="<title>|</title>";RS=EOF} {print $2}' $LINE |
   awk '{ if (NF > 0) printf("%s\n", $0); }'
done

I guess I need a regex solution. Any ideas?

回答1:

first install xml2 e.g.

sudo apt-get install xml2

wget -q -O - http://www.latin.fm | xml2 | grep meta | awk -F/ '{print $NF}'

Output

@property=og:title
@content=Latin FM
...

回答2:

Just do this:

$ awk '/meta name/{ gsub(/.*meta name=\042|\042.*/,"");print }' file
keywords

To get from website, use wget

wget -O- -q $url | awk '/meta name/{ gsub(/.*meta name=\042|\042.*/,"");print }' 

来源：https://stackoverflow.com/questions/7058567/how-can-i-extract-meta-tags-from-html-in-a-bash-awk-script