How do I POST JSON data with cURL?
You need to set your content-type to application/json. But -d
(or --data
) sends the Content-Type application/x-www-form-urlencoded
, which is not accepted on Spring's side.
Looking at the curl man page, I think you can use -H
(or --header
):
-H "Content-Type: application/json"
Full example:
curl --header "Content-Type: application/json" \ --request POST \ --data '{"username":"xyz","password":"xyz"}' \ http://localhost:3000/api/login
(-H
is short for --header
, -d
for --data
)
Note that -request POST
is optional if you use -d
, as the -d
flag implies a POST request.
On Windows, things are slightly different. See the comment thread.
Try to put your data in a file, say body.json
and then use
curl -H "Content-Type: application/json" --data @body.json http://localhost:8080/ui/webapp/conf
For Windows, having a single quote for the -d
value did not work for me, but it did work after changing to double quote. Also I needed to escape double quotes inside curly brackets.
That is, the following did not work:
curl -i -X POST -H "Content-Type: application/json" -d '{"key":"val"}' http://localhost:8080/appname/path
But the following worked:
curl -i -X POST -H "Content-Type: application/json" -d "{\"key\":\"val\"}" http://localhost:8080/appname/path