tldr/pages/common/curl.md

curl

Transfers data from or to a server. Supports most protocols including HTTP, FTP, POP3.

• Download the contents of an URL to a file:

curl {{http://example.com}} -o {{filename}}

• Download a file saving the output under the filename indicated by the URL:

curl -O {{http://example.com/filename}}

• Download a file, following [L]ocation redirects, and automatically [C]ontinuing (resuming) a previous file transfer:

curl -O -L -C - {{http://example.com/filename}}

• Send form-encoded data (POST request of type application/x-www-form-urlencoded):

curl -d {{'name=bob'}} {{http://example.com/form}}

• Send data, specifying a custom HTTP method, and including an extra header:

curl -d {{'{"name":"bob"}'}} -X {{PUT}} -H {{'Content-Type: application/json'}} {{http://example.com/users/1234}}

• Pass a user name and password for server authentication and show headers info only:

curl -u myusername:mypassword -I {{http://example.com}}

• Pass client certificate and key for a secure resource:

curl -v -key {{key.pem}} -cacert {{ca.pem}} -cert {{client.pem}} -k {{https://example.com}}