How can I get the value from an attribute using xmllint and XPath?
Question
I want to get the value of name and put it in a variable using XMLLint
<body>
<value name="abc"></value>
</body>
echo 'cat //body/value/@name' | xmllint --shell "test.xml"
/ > -------
name="abc"
/ >
So I want to assign the value "abc" to variable $test
6 answers
solution1
29 2012-08-10 16:49:38
You need to use fn:string() , which will return the value of its argument as xs:string . In case its argument is an attribute, it will therefore return the attribute's value as xs:string .
test=$(xmllint --xpath "string(//body/value/@name)" test.xml)
solution2
8 2012-07-27 08:28:22
Try this, it's not beautiful but it works :)
I just erase lines containing > from stdout , cut the string to get the second part after the = , and delete "
test=$(echo 'cat //body/value/@name' | xmllint --shell "test.xml" | grep -v ">" | cut -f 2 -d "=" | tr -d \");
echo $test
solution3
5 2017-05-27 18:00:15
An approach with a helper awk command that supports multiple attributes (a streamlined version of ego's approach ):
echo 'cat //*/@name' | xmllint --shell file | awk -F\" 'NR % 2 == 0 { print $2 }'
The awk command:
splits
xmllint's output lines into fields by"chars. (-F\\")- Note that
xmllintnormalizes quoting around attribute values to"..."on output, even if the input had'...', so it's sufficient to split by".
- Note that
only processes even-numbered lines (
NR %2 == 0), thereby filtering out the separator lines thatcatinvariably prints.print $2then prints only the 2nd field, which is the value of each attribute without the enclosing"...".
Assuming the following sample XML in file :
<body>
<value name="abc"></value>
<value name="def"></value>
</body>
the above yields:
abc
def
solution4
4 2014-06-05 03:23:23
I recently had to port my original simpler solution using --xpath to a platform lacking this feature, so had to adopt the "cat" solution too. This will handle multiple matches, tested on Ubuntu 12.04 and Solaris 11:
getxml() { # $1 = xml file, $2 = xpath expression
echo "cat $2" | xmllint --shell $1 |\
sed -n 's/[^\"]*\"\([^\"]*\)\"[^\"]*/\1/gp'
}
eg extracting instance names from a glassfish domain config:
$ getxml /tmp/test.xml "//server[@node-ref]/@name"
inst1
inst2
The sed post-processing just grabs all quoted values which was adequate for my needs (getting bits of glassfish config).
solution5
0 2021-11-05 01:27:37
为了匹配多行并提取其同名属性的值并建立在以前的答案的基础上，这对我有用，而且更短，呵呵
xmllint --xpath "//*/@value" file.xml | awk -F\" '{ print $2 }'
solution6
0 2023-01-30 09:44:03
The next works for me:
xmllint --xpath '//o/@loc' file.xml | sed -n 's/[^\"]*\"\([^\"]*\)\"[^\"]*/\1\n/gp'
The technical post webpages of this site follow the CC BY-SA 4.0 protocol. If you need to reprint, please indicate the site URL or the original address.Any question please contact:yoyou2525@163.com.