Response Header Lines for Static Files

ASP Tutorials - Herong's Tutorial Examples

Dr. Herong Yang, Version 5.00

ASP Tutorials - Herong's Tutorial Examples

∟Response Header Lines for Static Files

This section describes HTTP response header lines generated by IIS server for static files based their file name extensions.

Static files can be served directly by IIS server, if you copy files to \inetpub\wwwroot, IIS will set "Content-Type" header line based on the file name extension and the MIME settings of the server configuration. Let's look at 3 commonly used file name extensions.

1. Command: "java HttpRequestGet /hello.html 80" gives us:

HTTP/1.1 200 OK
Server: Microsoft-IIS/5.0
Date: Sat, 28 Dec 2002 19:27:28 GMT
Content-Type: text/html
Accept-Ranges: bytes
Last-Modified: Sat, 28 Dec 2002 15:05:54 GMT
ETag: "0f597e0a8e8c21:903"
Content-Length: 38

<html><body>Hello world!</body></html>

Couple of interesting notes here:

Content-Type was set to "text/html", because the file name extension was "html".
The request was marked as HTTP/1.0 in HttpRequestGet, but IIS responded with a higher version, HTTP/1.1.

2. Command: "java HttpRequestGet /dot.gif 80" gives us:

HTTP/1.1 200 OK
Server: Microsoft-IIS/5.0
Date: Sat, 28 Dec 2002 03:14:22 GMT
Content-Type: image/gif
Accept-Ranges: bytes
Last-Modified: Sun, 11 Aug 2002 21:48:20 GMT
ETag: "0aafb4ddc43c21:903"
Content-Length: 43

GIF89a......

As you can see, Content-Type was set correctly to "image/gif" for file name extension "gif", as defined in the MIME settings. I could not included the entity body here because it contains binary data.

3. Command: "java HttpRequestGet /hello.pdf 80" gives us:

HTTP/1.1 200 OK
Server: Microsoft-IIS/5.0
Date: Sat, 28 Dec 2002 03:29:21 GMT
Content-Type: application/pdf
Accept-Ranges: bytes
Last-Modified: Sat, 28 Dec 2002 21:22:12 GMT
ETag: "01ab9248554c31:903"
Content-Length: 909

%PDF-1.3
% ...
4 0 obj
......

Again, Content-Type was set correctly to "application/pdf" for file name extension "pdf", as defined in the MIME settings. I truncated the entity body to save some space.

Last update: 2002.

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ASP (Active Server Pages) Introduction

IIS (Internet Information Services) 5.0

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ASP Built-in Run-time Objects

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