HP e-Commerce / XML director server appliance sa8250 - Users Guide

C H A P T E R 2 HP e-Commerce/XML Director Server Appliance SA8250 User Guide
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The dup-syn command uses the following syntax:
config policygroup <name> service <name> dup-syn
<micro-seconds>
HTTP Error Detection
The SA8250 offers HTTP error detection for RICH services. When
HTTP error detection is enabled, the SA8250 scans the headers of
server responses for errors. If an HTTP error is found, the original
request is rerouted to another server for fulfillment, transparently to
the client. This process continues until a server responds without an
error, or all applicable servers have been tried. Conversely, if HTTP
error detection is disabled, the error is returned directly to the client.
HTTP error detection for errors 401-405 and 500-503 (as defined in
the HTTP specification) is configured with this command:
config policygroup <name> service <name> server
<name> port <port> http [enable | disable]
The SA8250 extends standard HTTP error handling by allowing the
server to return a special 606 error code. Detection and handling of
606 errors is configured separately. In this way, standard errors may
be passed to the client while 606 errors are handled transparently by
the system. If 606 error handling is enabled, the SA8250 scans for an
HTTP 606 response code. If the response code is found and another
server is available to handle the request, it is sent automatically. This
process continues until a server responds without an error, or until all
applicable servers have been tried.
The HTTP header for 606 handling is of the form: “HTTP/1.0 606
Error.” Users can generate this response through a variety of methods
including CGI and nph scripts. Consult your web server
documentation for information about generating custom error
messages.
config policygroup <name> service <name> server
<name> port <port> 606 [enable | disable]