HTTP Headers

Extra line before the document

The easiest way to see the errors is using telnet:

telnet mkdoc.com 80
Trying 195.10.230.124...
Connected to mkdoc.com (195.10.230.124).
Escape character is '^]'.
GET / HTTP/1.1
Host: mkdoc.com

HTTP/1.1 200 OK
Date: Wed, 27 Apr 2005 13:55:18 GMT
Server: Apache/1.3.31 (Unix) mod_throttle/3.1.2 mod_gzip/1.3.26.1a mod_perl/1.29
Vary: *
Transfer-Encoding: chunked
Content-Type: text/html; charset=UTF-8

45a0
<!DOCTYPE html PUBLIC
  "-//W3C//DTD XHTML 1.0 Transitional//EN"
  "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
...

The odd thing in the example above is the line before the DOCTYPE with 45a0 — what generates this, where is it from?

Extra lines added to error documents

Error documents have extra content added before and after:

telnet mkdoc.com 80
Trying 195.10.230.124...
Connected to mkdoc.com (195.10.230.124).
Escape character is '^]'.
GET /foo/ HTTP/1.1
Host: mkdoc.com

HTTP/1.1 404 Not Found
Date: Wed, 27 Apr 2005 14:05:19 GMT
Server: Apache/1.3.31 (Unix) mod_throttle/3.1.2 mod_gzip/1.3.26.1a mod_perl/1.29
Transfer-Encoding: chunked
Content-Type: text/html; charset=iso-8859-1

108
<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">
<HTML><HEAD>
<TITLE>404 Not Found</TITLE>
</HEAD><BODY>
<H1>Not Found</H1>
The requested URL /foo/ was not found on this server.<P>
<HR>
<ADDRESS>Apache/1.3.31 Server at mkdoc.com Port 80</ADDRESS>
</BODY></HTML>

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HTTP Headers

Extra line before the document

Extra lines added to error documents