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Author Topic: Location Header in Served Web Page  (Read 217 times)
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BobW
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« on: February 10, 2013, 04:32:02 pm »
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Just for fun, I've been experimenting with URL redirection using the "Location" header sent before html.

Below is my Arduino code that makes the web page I am serving at http://thatsgoodbob.dyndns.org:8248/

The page redirects, as expected, to http://google.com when viewed in Firefox or Chrome.

BUT ... if I try to view the page in IE 8 or IE 9, no redirection happens, and the page in the code below appears.


I know this is not really an Arduino issue, but all of the answers I've found on the web have to do with PHP, which is not the issue here.

Does anything see anything in my code that explains what is happening ?

Thank you for helping me.

Bob W   (code follows . . )

Code:
   
  client.println("HTTP/1.1 301 Moved Permanently");
  client.println("Location: http://google.com");
  client.println("Content-Type: text/html; charset=iso-8859-1");
  client.println("Connection: close");
  client.println();

  client.println("<!DOCTYPE HTML PUBLIC \"-//IETF//DTD HTML 2.0//EN\">");
  client.println("<html>");
  client.println("<body>");
  client.println("<h2>You should not be seeing this page . . .");
  client.println("</h2>"); 
  client.println("<br>"); 
  client.println("Because \"Location: http://google.com\" is in the header before the html.<br><br>");
  client.println("It redirects as expected in FF and Chrome.<br><br>");
  client.println("But this page displays in IE 8, 9<br><br>");
  client.println("What am I doing wrong ? <br><br>");

  client.println("</body>");
  client.println("</html>");
  client.stop();     
 
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Nick Gammon
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« Reply #1 on: February 10, 2013, 04:41:52 pm »
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Read this:

http://en.wikipedia.org/wiki/HTTP_location

Try a trailing slash.
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BobW
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« Reply #2 on: February 10, 2013, 04:52:51 pm »
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Adding trailing slash to http://google.com did not change behavior.
Still works in FF, Chrome.
Not in IE 8, 9.
Thanks anyway though !

Bob W
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« Reply #3 on: February 10, 2013, 06:17:53 pm »
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Could you try response 302? 

HTTP/1.1 302 Found
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« Reply #4 on: February 10, 2013, 06:41:14 pm »
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Changed to  HTTP/1.1 302 Found

No change in behavior.
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« Reply #5 on: February 10, 2013, 06:56:01 pm »
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Now you need tcp/ip sniffer to help.  if true it is bug and submit bug report to microsoft or shield OEM.
« Last Edit: February 10, 2013, 08:07:02 pm by sonnyyu » Logged

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« Reply #6 on: February 10, 2013, 08:43:18 pm »
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I reported a bug to Microsoft once. Thirty years ago, I think. I'm still waiting for a response.
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« Reply #7 on: February 10, 2013, 09:34:18 pm »
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Maybe the IE people don't want their users being redirected to undesirable/unintended sites.
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put in key search words,
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or in a google search box put key words site:http://arduino.cc/forum

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« Reply #8 on: February 10, 2013, 09:40:33 pm »
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http://www.httpwatch.com/

HttpWatch is an integrated HTTP sniffer for IE and Firefox
that provides new insights into how your website loads and performs.

HttpWatch Basic Version is free.

If you have chance please test it with IE 7, 6,5,4...
one time I my ghost back old windows 2000 image, and its IE 4 or 5 crashed at almost any modern web site. But it might be worked this one smiley
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« Reply #9 on: February 11, 2013, 02:35:30 pm »
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OK.
I beat it into submission.
The following code redirects properly in IE, FF and Chrome.
Problem seems to have been a missing <head> tag.
See http://thatsgoodbob.dyndns.org:8248 for demo.
Will be available for a short time longer.

Code follows.
Thanks for helping me !

Bob W.

Code:
  client.print("HTTP/1.1 301 Moved Permanently\r\n");
  client.print("Date: Mon, 11 Feb 2013 15:19:46 GMT\r\n");
  client.print("Server: Apache\r\n");
  client.print("Location: http://google.com/\r\n");
  client.print("Content-Length: 523\r\n");
  client.print("Connection: close\r\n");
  client.print("Content-Type: text/html; charset=iso-8859-1\r\n");
  client.print("\r\n");


  client.print("<!DOCTYPE HTML PUBLIC \"-//IETF//DTD HTML 2.0//EN\">\n");
  client.print("<html><head>\n");
  client.print("<title>Test Page</title>\n");
  client.print("</head><body>\n");
  client.print("<h2>You should not be seeing this page . . .</h2>\n"); 
  client.print("<br>"); 
  client.print("Because \"Location: http://google.com\" is in the header before the html.<br><br>");
  client.print("It redirects as expected in FF and Chrome.<br><br>");
  client.print("But this page displays in IE 8, 9<br><br>");
  client.print("What am I doing wrong ? <br><br>");
  client.print("(v0.08 Monday)<br><br>");

  client.print("</body>");
  client.print("</html>\n");
  client.stop();     
}
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