MaxRedirects (HttpRequest property)

Automatically handle redirects (HttpRequest class)

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

%currentNumber = httpRequest:MaxRedirects httpRequest:MaxRedirects = newNumber

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.

See also

HttpRequest class HttpResponse class	List of HttpRequest methods List of HttpResponse methods List of HTTP Helper methods	HttpRequest methods syntax HttpResponse methods syntax
Notation conventions for methods