How to replace variable in curl command in shell?

Question

I want to replace KEY in curl command with variable value in shell script.

KEY=KEY_VALUE

My curl command is as follow.

curl -s "https://api.kite.trade/quote?i=NSE:NIFTY+50&i=NSE:INF" -H "X-Kite-Version: 3" -H "Authorization: token XYZ:KEY"

Thanks in advance

Does anything speak against turning the string KEY into a parameter expansion $KEY and setting the variable KEY to whatever you want? — user1934428
– user1934428, Commented Jul 21, 2021 at 9:41

William Pursell · Accepted Answer · 2021-08-22 12:21:14Z

1

Fix your quotes and use the variable:

key=key_value
curl -s 'https://api.kite.trade/quote?i=NSE:NIFTY+50&i=NSE:INF' \
    -H 'X-Kite-Version: 3' -H "Authorization: token XYZ:${key}"

Use single quotes for strings that aren't interpolated (this allows you to not need to worry about whether or not there are any characters in the string that may be modified by interpolation, eg backslashes or dollar signs), and don't use variables with all cap names.

answered Aug 22, 2021 at 12:21

William Pursell

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