参考：
Handle HTTP Re-Directions in LoadRunner Scripts yourself
Action()
{
int HttpRetCode=0;
// Set redirection depth to 0
web_set_option("MaxRedirectionDepth", "0", LAST);
// Initial Location where we want to go
lr_save_string("http://www.mercury.com", "Location");
do
{
// Save new Redirection Info (Location: header)
web_reg_save_param("Location",
"LB=Location: ",
"RB=\r\n",
"Ord=1",
"NotFound=Warning",
"Search=Headers",
LAST );
// do any web call (This needs to be modified to suit your needs)
web_url("my_req",
"URL={Location}",
LAST );
// Get HTTP response Code
HttpRetCode = web_get_int_property(HTTP_INFO_RETURN_CODE);
} while ((HttpRetCode>=300) & (HttpRetCode<400));
return 0;
}