从HTML文件获取jpg图像 [英] Getting the jpg images from an HTML file

问题描述

我正在尝试使用grep获取HTML文件中jpg图像的完整url地址.一个问题是其中没有很多换行符，因此当我使用grep时，它会获取路径，但还有很多我不感兴趣的其他东西.如何获取jpg图片的网址? /p>

I'm trying to use grep to get the full url addresses of jpg images in an HTML file. One problem is that there aren't many newlines in it, so when I use grep it gets the path, but also a lot of other stuff I'm not interested in. How can I just get the urls for the jpg images?

推荐答案

一个sed命令

One single sed command

sed -n '/<img/s/.*src="\([^"]*\)".*/\1/p' yourfile.html

_{或使用 ERE (反斜杠:}

_{or using ERE (extended regular expressions) to avoid backslashes from above expression:}

sed -E -n '/<img/s/.*src="([^"]*)".*/\1/p' yourfile.html

一个基本的grep命令

One basic grep command

grep -o '<img[^>]*src="[^"]*"' yourfile.html

两个连续的基本grep命令

Two successive basic grep commands

grep -o '<img[^>]*src="[^"]*"' yourfile.html | grep -o '"[^"]*"'

使用Perl Regex的单个grep命令(PER)

One single grep commands using Perl Regex (PER)

grep -Po '<img[^>]*src="\K[^"]*(?=")' yourfile.html

将ack用作类似grep的替换

Using ack as a grep-like replacement

sudo apt install ack
ack -o '<img[^>]*src="\K[^"]*(?=")' yourfile.html

下载网页，这是由 s-hunter

curl -s example.com/a.html | sed -En '/<img/s/.*src="([^"]*)".*/\1/p'

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