MaxRedirects (HttpRequest property)

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This method lets you request automatic handling of redirects that a Get, Post, or Send method call receives from the server. Since redirects may be chained, that is, the location to which a redirect leads can also return a redirect, MaxRedirects specifies the maximum number of times a redirect is followed when it is returned from a web server.

Syntax

%httpreq:MaxRedirects = value %curr = %httpreq:MaxRedirects

Syntax terms

%httpreq	An instantiated HTTPRequest object.
value	A numeric expression that evaluates to an integer from 0 through 100, which indicates the maximum number of times a redirect is followed on one Get, Post, or Send call. If an invalid or out of range value is specified, the request is canceled. A value of 0 (the default) means redirects are not automatically handled.
%curr	The numeric variable for the assignment of the current value of MaxRedirects.

Usage notes

• An HTTP server may return an indication that a page has moved and that the client process should fetch it from a new location. A server indicates this case by returning a response code in the 300s and by returning a response header named “location” that indicates the new location of the page or resource. The HTTP Helper returns such a response code to the application and takes no further action.
• If the maximum number of redirections have been followed, and the last response is still a redirection response code, the last redirection response code is returned to the HTTP Helper application.
• When MaxRedirects is set to a value greater than zero, the following HTTP redirection response codes are automatically handled:

  301

  Moved Permanently

  302

  Found

  303

  See Other

  307

  Temporary Redirect

  For more details concerning HTTP Response codes, see http://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html.

• To facilitate working with redirects, the Url method of the HTTPResponse object returns the actual URL from which a response was obtained.