curl

Transfers data from or to a server.

Supports most protocols, including HTTP, FTP, and POP3.

More information.

• Download the contents of a URL to a file:

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

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

curl --remote-name {http://example.com/filename}

• Download a file, following location redirects, and automatically continuing (resuming) a previous file transfer and return an error on server error:

curl --fail --remote-name --location --continue-at - {http://example.com/filename}

• Send form-encoded data (POST request of type `application/x-www-form-urlencoded`). Use `--data @file_name` or `--data @'-'` to read from STDIN:

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

• Send a request with an extra header, using a custom HTTP method:

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

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

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

• Pass a username and password for server authentication:

curl --user 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}

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