Is the HTTP 'HEAD' verb useful in web development?
问题 I've read the w3.org spec on the 'HEAD' verb, and I guess I'm missing something. I can't see how it would be useful. Is the HTTP 'HEAD' verb useful in web development? If so, how? 回答1: From RFC2616: This method (HEAD) can be used for obtaining metainformation about the entity implied by the request without transferring the entity-body itself. This method is often used for testing hypertext links for validity, accessibility, and recent modification. The reason why HEAD is preferred to GET is