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Posted to users@tomcat.apache.org by Huseyin Sinecan <hs...@yahoo.com> on 2007/04/24 15:29:41 UTC
http header setting problem in servlet
Hello all,
I want to set header parameters of http response in my servlet.
I set parameters as below:
**************************************
theResponse.reset();
theResponse.resetBuffer();
theResponse.setHeader("Request Version", "HTTP/1.1");
theResponse.setStatus(200);
theResponse.setHeader("Date", "Wed, 18 Apr 2007 09:24:04 GMT");
theResponse.setHeader("Server", "Tomcat");
theResponse.addCookie(theRequest.getCookies()[0]);
theResponse.setHeader("pragma", "no-cache"); // HTTP 1.0
theResponse.setHeader("Cache-Control", "no-cache"); // HTTP 1.1
theResponse.setHeader("Expires", "Mon, 26 Jul 1997 05:00:00 GMT"); // a past date
theResponse.setDateHeader("Last-Modified", (new java.util.Date()).getTime());
theResponse.setHeader("Connection", "close");
theResponse.setContentType("text/plain");
theResponse.flushBuffer();
//..........
//some other things...
//..........
PrintWriter aPrintWriter = theResponse.getWriter();
aPrintWriter.write("this is the string to be put into the body part of the http packet.");
aPrintWriter.flush();
**************************************
However, when I check what I am sending as response (using the ethereal network sniffing tool) I see the result below:
***************************************
HTTP/1.1 200 OK\r\n
Request Version: HTTP/1.1
Response Code: 200
Server: Apache-Coyote/1.1\r\n
Content-Length: 68\r\n
Date: Tue, 24 Apr 2007 17:55:10 GMT\r\n
\r\n
Data (68 bytes)
***************************************
I am setting header parameters as it should be.. But it doesn't care about my parameters and Tomcat puts some values that it selects itself..
Would anyone has any idea about what I am doing wrong here..?
Thanks & Regards
Huseyin Sinecan
---------------------------------
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Re: http header setting problem in servlet
Posted by Martin Gainty <mg...@hotmail.com>.
I assume you've seen this post on implementing httplib?
http://www.ethereal.com/lists/ethereal-users/200512/msg00203.html
In the meanwhile Curl implements this feature with curl_setopt
http://us2.php.net/curl
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----- Original Message -----
From: "Huseyin Sinecan" <hs...@yahoo.com>
To: <us...@tomcat.apache.org>
Sent: Tuesday, April 24, 2007 9:29 AM
Subject: http header setting problem in servlet
> Hello all,
>
> I want to set header parameters of http response in my servlet.
>
> I set parameters as below:
>
> **************************************
> theResponse.reset();
> theResponse.resetBuffer();
>
> theResponse.setHeader("Request Version", "HTTP/1.1");
> theResponse.setStatus(200);
> theResponse.setHeader("Date", "Wed, 18 Apr 2007 09:24:04 GMT");
> theResponse.setHeader("Server", "Tomcat");
> theResponse.addCookie(theRequest.getCookies()[0]);
> theResponse.setHeader("pragma", "no-cache"); // HTTP 1.0
> theResponse.setHeader("Cache-Control", "no-cache"); // HTTP 1.1
> theResponse.setHeader("Expires", "Mon, 26 Jul 1997 05:00:00 GMT"); // a
> past date
> theResponse.setDateHeader("Last-Modified", (new
> java.util.Date()).getTime());
> theResponse.setHeader("Connection", "close");
> theResponse.setContentType("text/plain");
>
> theResponse.flushBuffer();
>
> //..........
> //some other things...
> //..........
>
> PrintWriter aPrintWriter = theResponse.getWriter();
> aPrintWriter.write("this is the string to be put into the body part of
> the http packet.");
>
> aPrintWriter.flush();
> **************************************
>
> However, when I check what I am sending as response (using the ethereal
> network sniffing tool) I see the result below:
> ***************************************
> HTTP/1.1 200 OK\r\n
> Request Version: HTTP/1.1
> Response Code: 200
> Server: Apache-Coyote/1.1\r\n
> Content-Length: 68\r\n
> Date: Tue, 24 Apr 2007 17:55:10 GMT\r\n
> \r\n
> Data (68 bytes)
> ***************************************
>
> I am setting header parameters as it should be.. But it doesn't care about
> my parameters and Tomcat puts some values that it selects itself..
>
> Would anyone has any idea about what I am doing wrong here..?
>
> Thanks & Regards
>
>
> Huseyin Sinecan
>
>
> ---------------------------------
> Ahhh...imagining that irresistible "new car" smell?
> Check outnew cars at Yahoo! Autos.
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Re: http header setting problem in servlet
Posted by Hassan Schroeder <ha...@gmail.com>.
On 4/24/07, Huseyin Sinecan <hs...@yahoo.com> wrote:
> Thanks for the answer.. Here is the complete code of doGet method:
For clarity, here's my entire adaptation of your code:
-----------------------------------------------------------------------------------
package com.example.test;
import javax.servlet.http.*;
import javax.servlet.*;
import java.io.*;
public class Something extends HttpServlet {
protected void doGet(HttpServletRequest theRequest,
HttpServletResponse theResponse) throws ServletException, IOException
{
theResponse.reset();
theResponse.resetBuffer();
theResponse.setHeader("Request Version", "HTTP/1.1");
theResponse.setStatus(200);
theResponse.setHeader("Date", "Wed, 18 Apr 2007 09:24:04 GMT");
theResponse.setHeader("Server", "Tomcat");
theResponse.addCookie(theRequest.getCookies()[0]);
theResponse.setHeader("pragma", "no-cache"); // HTTP 1.0
theResponse.setHeader("Cache-Control", "no-cache"); // HTTP 1.1
theResponse.setHeader("Expires", "Mon, 26 Jul 1997 05:00:00
GMT"); // a past date
theResponse.setDateHeader("Last-Modified", (new
java.util.Date()).getTime());
theResponse.setHeader("Connection", "close");
theResponse.setContentType("text/plain");
theResponse.flushBuffer();
String aResponse = "what now?";
PrintWriter aPrintWriter = theResponse.getWriter();
aPrintWriter.write(aResponse);
aPrintWriter.flush();
}
}
-----------------------------------------------------------------------------------
And here's the result from LiveHTTPHeaders -- hopefully that'll give
you something to go on...
-----------------------------------------------------------------------------------
HTTP/1.x 200 OK
Date: Tue, 24 Apr 2007 16:32:06 GMT
Server: foo/bar <= ignore, that's my own setting on the Connector
Set-Cookie: JSESSIONID=746B06EB8432B81A63CBA04725E2F131
Pragma: no-cache
Cache-Control: no-cache
Expires: Mon, 26 Jul 1997 05:00:00 GMT
Last-Modified: Tue, 24 Apr 2007 16:32:06 GMT
Connection: close
Content-Type: text/plain
Transfer-Encoding: chunked
-----------------------------------------------------------------------------------
HTH!
--
Hassan Schroeder ------------------------ hassan.schroeder@gmail.com
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Re: http header setting problem in servlet
Posted by Huseyin Sinecan <hs...@yahoo.com>.
Hello,
Thanks for the answer.. Here is the complete code of doGet method:
************************
protected void doGet(HttpServletRequest theRequest, HttpServletResponse theResponse) throws ServletException, IOException {
theResponse.reset();
theResponse.resetBuffer();
theResponse.setHeader("Request Version", "HTTP/1.1");
theResponse.setStatus(200);
theResponse.setHeader("Date", "Wed, 18 Apr 2007 09:24:04 GMT");
theResponse.setHeader("Server", "Tomcat");
theResponse.addCookie(theRequest.getCookies()[0]);
//theResponse.setHeader("Set-Cookie", "JSESSIONID=FixForBuggyProxy;Version=1;Discard;Path=\"/\""); // HTTP 1.1
theResponse.setHeader("pragma", "no-cache"); // HTTP 1.0
theResponse.setHeader("Cache-Control", "no-cache"); // HTTP 1.1
theResponse.setHeader("Expires", "Mon, 26 Jul 1997 05:00:00 GMT"); // a past date
theResponse.setDateHeader("Last-Modified", (new java.util.Date()).getTime());
//theResponse.setHeader("Set-Cookie2", "JSESSIONID=ForBuggyCachingProxies;Path=\"/\""); // HTTP 1.1
theResponse.setHeader("Connection", "close");
theResponse.setContentType("text/plain");
theResponse.flushBuffer();
String aResponse = "";
try {
RequestProcessor aRequestProcessor = new RequestProcessor();
aResponse = aRequestProcessor.processRequest(theRequest);
} catch (InvalidReqException e) {
System.out.println("EXCEPTION OCCURED: " + e);
} //end of try-catch block
catch (Exception ex) {
System.out.println(ex);
}
//theResponse.setContentLength(aResponse.length());
PrintWriter aPrintWriter = theResponse.getWriter();
aPrintWriter.write(aResponse);
aPrintWriter.flush();
} //end of doGet method
************************
I think I am playing with the correct response...
And here is an example communication between the client and my servlet application:
*******************************
POST /MmpNg/MmpNgServlet?x=y HTTP/1.1
Cookie: JSESSIONID=FixForBuggyProxy
User-Agent: OutlookAddin
Host: 192.168.10.77
Content-Length: 163
Cache-Control: no-cache
"data coming from client"
HTTP/1.1 200 OK
Server: Apache-Coyote/1.1
Content-Length: 68
Date: Tue, 24 Apr 2007 17:55:10 GMT
"data to be sent to client"
*******************************
Would you have any comments on this..? Sth is certainly wrong, but I am not able to see it..
Thanks & Regards
Huseyin Sinecan
Hassan Schroeder <ha...@gmail.com> wrote: On 4/24/07, Huseyin Sinecan wrote:
> I want to set header parameters of http response in my servlet.
Are you sure you're working on the right response object? Perhaps
you can post a simple but complete example that fails...
I just tried the following file as a JSP:
------------------------------------------------------------------
<%
response.setHeader("HooHaa", "whatever");
response.setHeader("Cache-Control", "no-cache");
%>
what now?
------------------------------------------------------------------
:: and can see the headers are set (using LiveHTTPHeaders).
--
Hassan Schroeder ------------------------ hassan.schroeder@gmail.com
---------------------------------------------------------------------
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---------------------------------
Ahhh...imagining that irresistible "new car" smell?
Check outnew cars at Yahoo! Autos.
Re: http header setting problem in servlet
Posted by Hassan Schroeder <ha...@gmail.com>.
On 4/24/07, Huseyin Sinecan <hs...@yahoo.com> wrote:
> I want to set header parameters of http response in my servlet.
Are you sure you're working on the right response object? Perhaps
you can post a simple but complete example that fails...
I just tried the following file as a JSP:
------------------------------------------------------------------
<%
response.setHeader("HooHaa", "whatever");
response.setHeader("Cache-Control", "no-cache");
%>
what now?
------------------------------------------------------------------
:: and can see the headers are set (using LiveHTTPHeaders).
--
Hassan Schroeder ------------------------ hassan.schroeder@gmail.com
---------------------------------------------------------------------
To start a new topic, e-mail: users@tomcat.apache.org
To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
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