How to run curl command with parameter in a loop from bash script?

Question

I have a curl command I would like to execute in a for loop. For example I wanted to loop 1-100 times and when curl command runs it uses iterator variable value in the curl command itself. something like

#!/bin/bash
  for i in {1..10}
 do
    curl -s -k 'GET' -H 'header info' -b 'stuff' 'http://example.com/id=$i'        
 done
 --notice here I want var i to be changing with every curl.

Anything helps Thanks.

Variables are not expanded inside single quotes. Use double quotes instead. — Barmar, Sep 25 '15 at 23:06

score 52 · Answer 1 · edited May 23 '17 at 10:33

52

Try this:

set -B                  # enable brace expansion
for i in {1..10}; do
  curl -s -k 'GET' -H 'header info' -b 'stuff' 'http://example.com/id='$i
done

See: Difference between single and double quotes in Bash

edited May 23 '17 at 10:33

Community

1
1

answered Sep 25 '15 at 22:44

Cyrus

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looking good. Thank you sir. – DoodleKana Sep 25 '15 at 22:52
also found out that i cannot use 1..10 format it gotto be listed out like {1,2,3,4,5,6,7,8,9,10} annoying – DoodleKana Sep 25 '15 at 23:01
1

Why can't you use `1..10`? What version of `bash` are you using? – Barmar Sep 25 '15 at 23:06
1

Try `for i in $(seq 1 10); do` – Cyrus Sep 25 '15 at 23:08
bash 4.3.30 version. – DoodleKana Sep 25 '15 at 23:18
Post output of: `for i in {1..10}; do echo -n "$i "; done` – Cyrus Sep 25 '15 at 23:23
I am getting {1..10} as the output – DoodleKana Sep 25 '15 at 23:26
17

`curl -s -k 'GET' -H 'header info' -b 'stuff' 'http://example.com/id=[1-10]'` **curl** can process sequences, no need to iterate manually, – Teddy Katayama Sep 23 '20 at 15:44
1

@TeddKatayama curl can send multiple request but that is sequential. The above script can be in parallel if we just add "&" at the curl command – roneo Oct 28 '22 at 12:49
1

`curl -s -Z 'GET' -H 'header info' -b 'stuff' 'http://example.com/id=[1-10]'` @roneo Curl also supports parallel requests via `–parallel / -Z` flag. – Teddy Katayama Aug 03 '23 at 17:02

How to run curl command with parameter in a loop from bash script?

1 Answers1