I am having trouble using httpZip with another ISAPI filter that rewrites URLs (like ISAPI Rewrite). Is there a way to make these two filters interoperate successfully?
In most cases, yes. Both commercial and custom-coded ISAPI filters that do URL rewriting can interact badly with httpZip, but the problem is almost always attributable to the order in which the two filters operate on the request. If, like httpZip, the URL rewriting filter has a “High” priority, the problem can often be solved by placing the URL rewriting filter above httpZip in the Internet Services Manager’s ISAPI Filters tab and restarting IIS. In the case of a custom-coded URL rewriting filter, it may sometimes be necessary to change that filter’s code in order to alter its priority, or even move its decision logic to an earlier event notification. However, the problem nearly always has a straightforward solution — please contact us if you need help finding it.
