curl

Transfers data from or to a server. Supports most protocols, including HTTP, FTP, and 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 a request with an extra header, using a custom HTTP method:

curl -H {{'X-My-Header: 123'}} -X {{PUT}} {{http://example.com}}

• Send data in JSON format, specifying the appropriate content-type header:

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

• Pass a user name and password for server authentication:

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

• Pass client certificate and key for a resource, skipping certificate validation:

curl --cert {{client.pem}} --key {{key.pem}} --insecure {{https://example.com}}