How to enable WinHttp Tracing on Vista, 2008 and Windows 7
WinhttpTracecfg.exe for Vista does not exist, so how can you get a WinHttp trace in Vista and above?
WinHttpTraceCfg.exe has been replaced in Vista and above with the netsh winhttp command.
see this blog:
https://blogs.msdn.com/wndp/archive/2007/03/21/winhttp-configuration-for-windows-vista.aspx
NOTE: For 32 bit tracing on a 64 bit system you need to use the 32 bit netsh from the SysWOW64 directory. This goes for proxy settings as well! This netsh is located in the C:\Windows\SysWOW64 directory (if you did a default install).
A typical command to enable full tracing for WinHttp would look like this:
C:\Windows\system32>netsh winhttp set tracing trace-file-prefix="C:\Temp\WinHttpLog" level=verbose format=hex state=enabled
For a 32 bit process on a 64 bit OS it would be from the SysWOW64 dir like this:
C:\Windows\SysWOW64>netsh winhttp set tracing trace-file-prefix="C:\Temp\WinHttpLog" level=verbose format=hex state=enabled
You would reproduce the issue and then turn off tracing like this:
C:\Windows\system32>netsh winhttp set tracing state=disabled
This would leave the other parameters you set previously to remain so the next time you want to enable tracing simply type:
C:\Windows\system32>netsh winhttp set tracing state=enabled
Other parameters are available:
C:\Windows\system32>netsh winhttp set tracing
will show you the options:
Usage: set tracing
[output=]file|debugger|both
[trace-file-prefix=]<string>
[level=]default|verbose
[format=]ansi|hex
[max-trace-file-size=]<number>
[state=]enabled|disabled
Parameters:
Tag Value
trace-file-prefix - Prefix for the log file (can include a path)
specify "*" to delete an existing prefix
output - Where the trace entries are written/displayed to
level - How much information to log
format - Display format of network traffic (hex or ansi)
max-trace-file-size - Maximum size of the trace file (in bytes)
state - Enables or disables winhttp tracing
Examples:
set tracing trace-file-prefix="C:\Temp\Test3" level=verbose format=hex
set tracing output=debugger max-trace-file-size=512000 state=enabled
You can display the existing settings with this command:
C:\Windows\system32>netsh winhttp show tracing
Current WinHTTP Tracing settings:
Tracing is not enabled.
Trace File Prefix: C:\Temp\Test3
Trace Output: file
Trace Level: verbose (headers, APIs, and entity body)
Network Traffic Format: hex
Maximum size of trace file (in bytes): 65535
Let me know if this helps!
Comments
Anonymous
February 16, 2011
I found your post and maybe you can help. When I enter netsh winhttp set tracing trace-file-prefix="C:UsersRedDocumentsWinHTTPLog" format=ansi state=enabled But I always get Error writing tracing settings. (5) Access is denied. Do you know what I might be doing wrong?Anonymous
February 16, 2011
Try Running the command from an elevated command prompt. Hit the Windows Start button, then type cmd. You should see cmd.exe in the list, Right click on that and choose 'Run as Administrator' Let me know if that does it!Anonymous
June 22, 2011
Thanks a lot! It worked for me!! ;)Anonymous
February 12, 2012
The comment has been removed