ws.async » head(url,output)

Description

This command is similar to its ws counterpart, except for the asynchronous HTTP invocation and response handling.

This command is identical to GET except that the server MUST NOT return a message-body in the response. The meta information contained in the HTTP headers in response to a HEAD request SHOULD be identical to the information sent in response to a GET request. This command can be used for obtaining meta information about the entity implied by the request without transferring the entity-body itself. This command is often used for testing hypertext links for validity, accessibility, and recent modification. The response will be saved to output. To learn about how to manipulate the response returned from the target URL, visit HTTP Response.

Parameters

• url - the target URL
• output - the file to save the request and response information

See Also

• delete(url,body,output)
• get(url,queryString,output)
• patch(url,body,output)
• post(url,body,output)
• put(url,body,output)