Capture a string from JSON response

sai

10/8/22, 6:43 PM

I have below Json response for POST method in bash and would like to capture value after sessionId":" and assign it to variable session_ID.

{"changeId":"79911476-53a4-46e1-8ffd-422436b51ad1","changeType":"created","record":{"key":"159.65.198.219"}},{"changeId":"bd52dcbd-a5ab-4557-b2b8-88793c2d2964","changeType":"created","record":{"key":"161.35.111.167"}},{"changeId":"f4f5c94e-6c06-473c-b810-b7bbd69c71ad","changeType":"created","record":{"key":"161.35.123.111"}}],"sessionId":"b7305d77-20f1-4d57-9eb1-9b9fb4f9552d"}

#API call

request_post="$(curl --insecure --request POST "endpoint_URL")"

echo $request_post

I need help to complete below step

#Cut out sessionId from response

session_ID=

1 + 2

bash

grep

sed

cut-command

FedKad

10/8/22, 6:53 PM

You should use the `jq` command. Google "How use jq command in Linux"

steeldriver

10/8/22, 7:22 PM

If you want help with `jq`, please make sure that your example is a complete parsable JSON fragment

Score:0

Ubuntu

Philippos

10/28/22, 10:25 AM

While parsing json structures should be done by a json parser, trivial cases like this can be done with a trivial tool and you may pipe the answer though sed, for example:

sed 's/.*"sessionId":"\([^"]*\).*/\1/'
      \______________/  \___/  \/
             A            B    C

A matches everything upto and including "sessionId":", B matches all following non-", which is the actual sessionId, and C matches the rest of the line. B is included in , so it can be referred to in the replacement as \1. So the whole line is replaced by the sessionId only.

Of course, if the output can be split over several lines or uses other variations allowed by json format, the script will get more complicated.

0 + 0

Elon Musk

I sit in a Tesla and translated this thread with Ai:

EN: Capture a string from JSON response

TH: จับสตริงจากการตอบกลับ JSON

RO: Capturați un șir din răspunsul JSON

RU: Захватить строку из ответа JSON

VI: Chụp một chuỗi từ phản hồi JSON

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