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Article ID: 247643 - Last Review: December 3, 2007 - Revision: 2.5
HTTP/1.1 Error 501 - Not Implemented
This article was previously published under Q247643
When you attempt to use an unknown method from an Internet client, the following error message occurs:
HTTP/1.1 501 Not Implemented
This behavior is by design. Internet Information Services (IIS) only supports the methods defined in "RFC 2616 - Hypertext Transfer Protocol -- HTTP/1.1" and "RFC 2518 - HTTP Extensions for Distributed Authoring -- WEBDAV." The methods are listed in the following table:
Collapse this tableExpand this table
| Method | Protocol | RFC | Section |
|---|
| CONNECT | HTTP | 2616 | 9.9 |
| COPY | WEBDAV | 2518 | 8.8 |
| DELETE | HTTP | 2616 | 9.7 |
| GET | HTTP | 2616 | 9.3 |
| HEAD | HTTP | 2616 | 9.4 |
| LOCK | WEBDAV | 2518 | 8.10 |
| MKCOL | WEBDAV | 2518 | 8.1 |
| MOVE | WEBDAV | 2518 | 8.9 |
| OPTIONS | HTTP | 2616 | 9.2 |
| POST | HTTP | 2616 | 9.5 |
| PROPFIND | WEBDAV | 2518 | 8.1 |
| PROPPATCH | WEBDAV | 2518 | 8.2 |
| PUT | HTTP | 2616 | 9.6 |
| TRACE | HTTP | 2616 | 9.8 |
| UNLOCK | WEBDAV | 2518 | 8.11 |
For more information on these topics, please see the information at the following:
APPLIES TO
- Microsoft Internet Information Services 6.0
- Microsoft Internet Information Services 5.0
- Microsoft Internet Information Services 7.0
| kbhttp501 kbnofix kbprb kbprod2web KB247643 |
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