Whats an ISAPI Extension?
ISAPI (Internet Services Application Programming Interface) is a technology that enables developers to extend the functionality provided by an IIS server. An ISAPI extension is a dynamic link library (.dll) that uses ISAPI to provide a set of web functions above and beyond those natively provided by IIS. When a user needs to use one of the functions that an ISAPI extension exposes, they send a request to the server. It’s possible in some cases to call an ISAPI extension directly, but it’s more common for users to request files on the server that contain commands to be processed. When a user requests such a file, IIS determines which ISAPI extension should be used to parse the file by consulting a table of script mappings that list the file extensions associated with each ISAPI extension on the server. What’s wrong with the BizTalk Server HTTP Receiver? There is a flaw in the BizTalk Server ISAPI extension used to receive HTTP documents – known as the HTTP receiver. As a result, it is p
