Internet Explorer uses HTTP/1.0 GET requests instead of HTTP/1.1 GET requests to connect to a Web site

When you use Internet Explorer to connect to a Web site, the trace analysis of the connection may indicate that Internet Explorer is sending HTTP/1.0 GET requests instead of sending HTTP/1.1 GET requests.

This problem occurs even when you enable the Use HTTP 1.1 option and the Use HTTP 1.1 through proxy connections option in Internet Explorer.

 

CAUSE

This problem occurs because of a design change in how the Wininet.dll file reads the values of the Use HTTP 1.1 option and the Use HTTP 1.1 through proxy connections option as a policy. In this case, the Security_HKLM_Only registry entry is enabled. This design change does not consider the effect of the Security_HKLM_Only registry entry. When the Security_HKLM_Only registry entry is enabled, the default settings for the Use HTTP 1.1 option and for the Use HTTP 1.1 through proxy connections option are set to be disabled. By default, the EnableHttp1_1 registry entry and the ProxyHttp1.1 registry entry do not exist. Therefore, when the Wininet.dll file tries to read them in the registry, the values of these registry entries are determined to be turned off.

The Security_HKLM_Only registry entry is stored in the following registry subkey:

HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows\CurrentVersion\Internet Settings

 

WORKAROUND

Warning Serious problems might occur if you modify the registry incorrectly by using Registry Editor or by using another method. These problems might require that you reinstall the operating system. Microsoft cannot guarantee that these problems can be solved. Modify the registry at your own risk.
To work around this problem, manually add the EnableHttp1_1 registry entry and the ProxyHttp1.1 registry entry to the HKEY_LOCAL_MACHINE registry subkey. To do this, follow these steps:

1. Click Start, click Run, type regedit, and then click OK.
2. Locate and then click the following registry subkey:

HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Internet Settings

3. On the Edit menu, point to New, and then click DWORD Value.
4. Type EnableHTTP1.1, and then press ENTER.
5. Right-click EnableHTTP1.1, and then click Modify.
6. Type 1, and then click OK.
7. On the Edit menu, point to New, and then click DWORD Value.
8. Type ProxyHttp1.1, and then press ENTER.
9. Right-click ProxyHttp1.1, and then click Modify.
10. Type 1, and then click OK.
11. Exit Registry Editor.

Note By default, the two registry entries will be added.

 


APPLIES TO
Microsoft Internet Explorer 6.0
Windows Internet Explorer 7

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Microsoft Knowledge Base Article

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