[SOLVED] To read specific path string from generation of curl result(SED/AWK/Grep)

Issue

I am trying to read specific path(/opt/links/stances/2) from where I pulled out result using curl command.

Curl command:-

curl -s http://localhost:8080/stances/1/Dirs 

Result from above command:-

{"LocalWorkingDir":"/opt/links/stances/1","Workers":[{"WorkerInstanceID":2,"WorkerHostname":"yolo.automation.local","WorkerInstanceRunDir":"/opt/links/stances/2"}]}

command i am trying to read /opt/links/stances/2 from generated output :-

curl -s http://localhost:8080/stances/1/Dirs |  sed 's|$1|" "|' | awk '{print $1}'

I am ending up with no result. Please help me with command to read the path(/opt/links/stances/2). thanks in advance.

Solution

If you have gnu grep then you can use a PCRE regex like this:

curl -s http://localhost:8080/stances/1/Dirs | 
grep -oP '"WorkerInstanceRunDir":"\K[^"]+'

/opt/links/stances/2

Details:

• "WorkerInstanceRunDir":": Match literal text "WorkerInstanceRunDir":"
• \K: Reset matched info
• [^"]+: Match 1+ non-" characters

If you don't have gnu grep installed then use this sed:

curl -s http://localhost:8080/stances/1/Dirs |
sed -E 's/.*"WorkerInstanceRunDir":"([^"]+).*/\1/'

Answered By - anubhava