FIX: Internet Explorer Sends Two GET Requests for the Same Data When the MIME Handler Is an ActiveX Control

When an ActiveX control is registered as a Multipurpose Internet Mail Extensions (MIME) handler for a Content Type, Internet Explorer sends two GET requests for the same data.

When instantiating a full embedding window, URLMON and Microsoft's HTML parsing and rendering engine (MSHTML) do not properly communicate to retrieve the MIME type. To rediscover the Content Type, MSHTML generates a second GET request with the "contype" userAgent string. This is a byte-range request that MSHTML initiates as part of "data sniffing" to detect the MIME type.

Internet Explorer 5.5

To resolve this problem, obtain the latest service pack for Internet Explorer version 5.01. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:

Internet Explorer 5.01

To resolve this problem, obtain the latest service pack for Internet Explorer version 5.01. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:

Microsoft has confirmed that this is a bug in the Microsoft products that are listed at the beginning of this article.

This problem was first corrected in Internet Explorer version 5.01 Service Pack 2.

This problem was first corrected in Internet Explorer version 5.5 Service Pack 1.

For more information about developing Web-based solutions for Microsoft Internet Explorer, visit the following Microsoft Web sites: (c) Microsoft Corporation 2000, All Rights Reserved. Contributions by Kusuma Vellanki, Microsoft Corporation.