setting If-Modified-Since programmatically

[Sam Carleton]

I would like to set the If-Modified-Since to the last modified time of
the file, how does one go about doing that?

 

[Karl Seguin [MVP]]

If it's an ASP.NET page, you might be able to play with Response.AddHeader -
though I'm not sure if IIS will overwrite the value. If IIS does overwrite
the value OR you want to control the last-modified for an non-aspx.net file,
you're likely stuck with having to write an ISAPI filter. With IIS 7, you'll
be able to write those in .NET (yay).

Karl

 

[Sam Carleton]

If it's an ASP.NET page, you might be able to play with Response.AddHeader -
though I'm not sure if IIS will overwrite the value. If IIS does overwrite
the value OR you want to control the last-modified for an non-aspx.net file,
you're likely stuck with having to write an ISAPI filter. With IIS 7, you'll
be able to write those in .NET (yay).

Karl,

Thank you! I have been a windows developer for many moons now. I have
tabled in web programming, but.. Well, it is a very different world
Question: now do I confirm the code is working? Here is what I have
and I am not seeing anything different in the generated HTML:

FileInfo fi = new FileInfo(this.Request.PhysicalPath);
this.Response.AddHeader("If-Modified-Since",
fi.LastWriteTimeUtc.ToString("r"));

Sam

 

[Karl Seguin [MVP]]

headers aren't rendered in the html.

Get a tool like fiddler (www.fiddlertool.com, free) set it up to proxy your
browser (IE should automatically detect it running) and hit the page. Then
look at the response headers before and after, hopefully something changed.

Karl

 

[Sam Carleton]

headers aren't rendered in the html.

Get a tool like fiddler (www.fiddlertool.com, free) set it up to proxy your
browser (IE should automatically detect it running) and hit the page. Then
look at the response headers before and after, hopefully something changed.

Karl,

Thanks a million! Fiddler shows that it is working!!!!! I much
appreciate it!

Sam