RFC 2068:Hypertext Transfer Protocol -- HTTP/1.1
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clients and server


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... 12] date format and lacks a four-digit year. HTTP/1.1 clients and servers that parse the date value MUST accept all three formats (for compatibility with HTTP/1.0 ...
... date/time stamp format apply only to their usage within the protocol stream. Clients and servers are not required to use these formats for user presentation, request logging, etc. ...
... tokens should be registered; to allow interoperability between clients and servers, specifications of the content coding algorithms needed to implement a new value should be ...


... connection. Clients and servers SHOULD NOT assume that a persistent connection is maintained for HTTP ...
... client or server wishes to time-out it SHOULD issue a graceful close on the transport connection. Clients and servers SHOULD both constantly watch for the other side of the transport close, and ...


... methods cannot be assumed to share the same semantics for separately extended clients and servers. The Host ...


... HTTP entity. (However, not all clients and servers need to support byte- range operations.) ...


... The requirements that clients and servers support the Host request- header ...
... requirements: o Both clients and servers MUST support the Host request-header. ...
... Some clients and servers may wish to be compatible with some previous implementations of persistent connections in HTTP/1.0 ...
... implementations of persistent connections in HTTP/1.0 clients and servers. Persistent connections in HTTP/1.0 must be explicitly ...



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