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OpenSolaris 2009.06 - man page for ne_set_request_expect100 (opensolaris section 3)

NE_SET_REQUEST_E(3)						neon API reference					       NE_SET_REQUEST_E(3)

ne_set_request_expect100 - function to enable Expect: 100-continue support
#include <ne_request.h> void ne_set_request_expect100 (ne_request *request, int flag);
An extension introduced in the HTTP/1.1 specification was the use of the Expect: 100-continue header. This header allows an HTTP client to be informed of the expected response status before the request message body is sent: a useful optimisation for situations where a large message body is to be sent. The ne_set_request_expect100 function can be used to enable this feature by passing the flag parameter as any non-zero integer. Warning Unfortunately, if this header is sent to a server which is not fully compliant with the HTTP/1.1 specification, a deadlock occurs resulting in a temporarily "hung" connection. neon will recover gracefully from this situation, but only after a 15 second timeout. It is highly recommended that this option is not enabled unless it is known that the server in use correctly implements Expect: 100-continue support.
Joe Orton <>.
See attributes(5) for descriptions of the following attributes: +--------------------+-----------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +--------------------+-----------------+ |Availability | SUNWneon | +--------------------+-----------------+ |Interface Stability | Volatile | +--------------------+-----------------+
Source for Neon is available on neon 0.25.5 20 January 2006 NE_SET_REQUEST_E(3)