DOCUMENT:Q293131 15-AUG-2002 [iis] TITLE :"HTTP 400 - Bad Request" Err Msg if Content Length Header is 0 PRODUCT :Internet Information Server PROD/VER::4.0,5.0 OPER/SYS: KEYWORDS:kbCOMIS kbWinNT400PreSP7Fix kbWin2000PreSP3Fix kbWin2000sp3fix ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - Microsoft Internet Information Server version 4.0 - Microsoft Internet Information Services version 5.0 ------------------------------------------------------------------------------- SYMPTOMS ======== When you are running Internet Information Server (IIS) and you browse a Web site, you may receive the following error message in the browser: HTTP 400 - Bad Request Refreshing the page in the browser may make the error message disappear. CAUSE ===== Under certain conditions, IIS may misinterpret a Content-Length header of 0 (zero) as a bad HTTP request. RESOLUTION ========== Internet Information Services 5.0 --------------------------------- To resolve this problem, obtain the latest service pack for Windows 2000. For additional information, click the following article number to view the article in the Microsoft Knowledge Base: Q260910 How to Obtain the Latest Windows 2000 Service Pack The English version of this fix should have the following file attributes or later: Date Time Version Size File name ----------------------------------------------------- 4/11/2001 05:46p 5.0.2195.3492 357,648 W3svc.dll Internet Information Server 4.0 ------------------------------- A supported fix is now available from Microsoft, but it is only intended to correct the problem that is described in this article. Apply it only to computers that are experiencing this specific problem. To resolve this problem, contact Microsoft Product Support Services to obtain the fix. For a complete list of Microsoft Product Support Services phone numbers and information about support costs, visit the following Microsoft Web site: http://support.microsoft.com/default.aspx?scid=fh;EN-US;CNTACTMS NOTE: In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The usual support costs will apply to additional support questions and issues that do not qualify for the specific update in question. The English version of this fix should have the following file attributes or later: Date Time Version Size File name Platform -------------------------------------------------------------- 17-Apr-2001 10:30 4.2.765.1 214,544 Adsiis.dll x86 17-Apr-2001 10:30 4.2.765.1 330,672 Asp.dll x86 17-Apr-2001 10:29 4.2.765.1 55,392 Httpodbc.dll x86 17-Apr-2001 10:30 4.2.765.1 98,912 Iischema.dll x86 17-Apr-2001 10:28 4.2.765.1 63,472 Iislog.dll x86 17-Apr-2001 10:29 4.2.765.1 185,792 Infocomm.dll x86 17-Apr-2001 10:28 4.2.765.1 29,520 Iscomlog.dll x86 17-Apr-2001 10:30 4.2.765.1 38,256 Ssinc.dll x86 17-Apr-2001 10:30 4.2.765.1 25,360 Sspifilt.dll x86 17-Apr-2001 10:29 4.2.765.1 229,024 W3svc.dll x86 17-Apr-2001 10:29 4.2.765.1 88,032 Wam.dll x86 17-Apr-2001 10:27 4.2.765.1 307,984 Adsiis.dll Alpha 17-Apr-2001 10:27 4.2.765.1 552,720 Asp.dll Alpha 17-Apr-2001 10:27 4.2.765.1 89,360 Httpodbc.dll Alpha 17-Apr-2001 10:27 4.2.765.1 107,280 Iischema.dll Alpha 17-Apr-2001 10:26 4.2.765.1 112,912 Iislog.dll Alpha 17-Apr-2001 10:26 4.2.765.1 305,424 Infocomm.dll Alpha 17-Apr-2001 10:26 4.2.765.1 46,352 Iscomlog.dll Alpha 17-Apr-2001 10:27 4.2.765.1 60,688 Ssinc.dll Alpha 17-Apr-2001 10:27 4.2.765.1 39,696 Sspifilt.dll Alpha 17-Apr-2001 10:27 4.2.765.1 385,296 W3svc.dll Alpha 17-Apr-2001 10:26 4.2.765.1 150,288 Wam.dll Alpha STATUS ====== Internet Information Services 5.0 --------------------------------- Microsoft has confirmed that this is a problem in Internet Information Services 5.0. This problem was first corrected in Windows 2000 Service Pack 3. Internet Information Server 4.0 ------------------------------- Microsoft has confirmed that this is a problem in Internet Information Server 4.0. MORE INFORMATION ================ This error may occur anytime the Content-Length header is 0 (zero), but this error occurs most often when you search an IBM Lotus Domino Server. If you are searching a Lotus Domino Server, after you apply this hotfix you may see the following error message in the browser (instead of the "HTTP 400 - Bad Request" error message): HTTP Web Server: Lotus Notes Exception - Query is not understandable Additional query words: kbIISCom ====================================================================== Keywords : kbCOMIS kbWinNT400PreSP7Fix kbWin2000PreSP3Fix kbWin2000sp3fix Technology : kbiisSearch kbiis500 kbiis400 Version : :4.0,5.0 Hardware : ALPHA x86 Issue type : kbbug Solution Type : kbfix ============================================================================= THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES SO THE FOREGOING LIMITATION MAY NOT APPLY. Copyright Microsoft Corporation 2002.