我有一口 feed子,看着这样的东西。 我想要做的是贪.。 html来自这一饲料。 (基本上,最大的项目是ur) 任何关于如何这样做的想法?
<rss>
<item>
<title>ABC</title>
<url>
test.html
</url>
</item>
<item>
<title>CDE</title>
<url>
test1.html
</url>
</item>
</rss>
感谢!
我有一口 feed子,看着这样的东西。 我想要做的是贪.。 html来自这一饲料。 (基本上,最大的项目是ur) 任何关于如何这样做的想法?
<rss>
<item>
<title>ABC</title>
<url>
test.html
</url>
</item>
<item>
<title>CDE</title>
<url>
test1.html
</url>
</item>
</rss>
感谢!
如果结构是定的,而且你知道《欧洲统一法》有定点,那么你可以做的是:
cat <yourfile> | grep ".html" | head -n1
If you don t know the postfix (or the string "html" can exist before), you can do:
cat <yourfile> | grep -A1 "<url>" | head -n2 | tail -n1
EDIT In case, the structure is not fixed (i.e., no newlines), there this
cat <yourfile> | grep -o "<url>[^<]*</url>" | head -n1 | cut -d > -f2 | cut -d < -f1
或
cat <yourfile> | grep -o "<url>[^<]*</url>" | head -n1 | sed -E -e"s#<url>(.*)</url>#1#"
可以工作。
这或许有助于你:
sed /<url>/,/</url>/{//d;s/ *//;q};d file.xml
这份文稿应当发挥作用:
awk /<url>/ && url==0 {url=1;next;} {if(url==1) {print;url=2;}} file
<>光线>
Following grep command might also work:
grep -m 1 "^ *<url>" -A1 file | grep -v "<url>"
我建议,不要使用基于线的工具,而是利用Xsl的转变,将你想要的数据从文件中删除,而不要对其格式作假设。
如果您将这一条保留到get-url.xsl
:
<?xml version="1.0"?>
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:xs="http://www.w3.org/2001/XMLSchema">
<xsl:output method="text"/>
<xsl:template match="/">
<xsl:value-of select="normalize-space(rss/item/url)"/>
</xsl:template>
</xsl:stylesheet>
Then you can get the value of url
from feed.xml
like this:
$ xsltproc get-url.xsl feed.xml; echo
test.html
$
额外<代码>echo只是给你在产出结束之后新行,使之便于使用交互式剪辑。 如果你将结果重新分配给一个票价变量($(
)。
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