Formatting curl command

Question

In Windows Git Bash, this curl command works:

curl -v 'https://developer.api.autodesk.com/authentication/v1/authenticate' \
  -X 'POST' \
  -H 'Content-Type: application/x-www-form-urlencoded' \
  -d 'client_id=6BfkncD9ypGMiHkjrfka5ydqrG4GLx1z&client_secret=EC5i7QG61Qg8jDmZ&grant_type=client_credentials&scope=data:read'

But when I try to format the contents in -d, it doesn't work:

curl -v 'https://developer.api.autodesk.com/authentication/v1/authenticate' \
  -X 'POST' \
  -H 'Content-Type: application/x-www-form-urlencoded' \
  -d 'client_id=6BfkncD9ypGMiHkjrfka5ydqrG4GLx1z&
    client_secret=EC5i7QG61Qg8jDmZ&
    grant_type=client_credentials&
    scope=data:read
  '

Anyway I can format it and it works?

score 3 · Accepted Answer · answered Jun 01 '21 at 08:32

The -d/--data/--data-ascii option of curl sends a data which is expected to be in one line in case of URL paraleters (as opposed to JSON, as seen for instance here, where the data can be on multiple lines).

That means you need to build your string first in a variable, then use that variable in curl.

vonc@vclp MINGW64 /c/test
$ data=$(printf '%s' '
    client_id=6BfkncD9ypGMiHkjrfka5ydqrG4GLx1z&
    client_secret=EC5i7QG61Qg8jDmZ&
    grant_type=client_credentials&
    scope=data:read
' | sed ':a; N; $!ba; s/\n\s*//g')

curl -v 'https://developer.api.autodesk.com/authentication/v1/authenticate' \
  -X 'POST' \
  -H 'Content-Type: application/x-www-form-urlencoded' \
  -d "${data}"

So two steps in this case.

Formatting curl command

1 Answers1