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33 lines
851 B
Markdown
33 lines
851 B
Markdown
5 years ago
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Get system properties of the Java application through Http api and
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extract the value of `java.class.path`.
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`json_data=$(curl -Ss -XPOST http://localhost:8563/api -d '
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{
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"action":"exec",
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"command":"sysprop"
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}')`{{execute T3}}
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* Extract value with `sed`:
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`class_path=$(echo $json_data | tr -d '\n' | sed 's/.*"java.class.path":"\([^"]*\).*/\1/')
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echo "classpath: $class_path"`{{execute T3}}
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* Extract value with `json_pp/awk`:
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`class_path=$(echo $json_data | tr -d '\n' | json_pp | grep java.class.path | awk -F'"' '{ print $4 }')
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echo "classpath: $class_path"`{{execute T3}}
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Output:
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```
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classpath: arthas-demo.jar
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```
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NOTE:
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* `echo $json_data | tr -d '\n'` : Delete line breaks (the value of
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`line.separator`) to avoid affecting the processing of `sed`/`json_pp`
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commands.
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* `awk -F'"' '{ print $4 }'` : Use double quote as delimiter
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