Monday, January 4, 2010

Can browsers that are only HTTP/1.0 compliant view websites that are hosted by a name-based virtual hosting system?

Browsers that are HTTP/1.0 compliant can view websites that are hosted by name if their version of the browser issues requests with an additional Host header field. (This is a required header in HTTP/1.1, but all current HTTP/1.0 browsers also issue this header)

The justification of browsers not being HTTP1.0 compliant is not sufficient to warrant large scale IP-based hosting. Statistics collected by APNIC over a four month period show that almost all browsers visiting www.apnic.net provide the Host: header field (98.9% of HTTP1.0 and 99.8% HTTP1.1).

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