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Message-ID: <F58968066573D4118FC600508BCF7EDAE46F6F@exchuk19.eu.ssmb.com>
From: "Samson, Lyndon [IT]" <lyndon.samson@ssmb.com>
To: "'tomcat-user@jakarta.apache.org'" <tomcat-user@jakarta.apache.org>
Subject: RE: Hi Ho - Problem with ServletOutputStream in Tomcat
Date: Wed, 14 Feb 2001 13:31:37 -0000

This is true, I wrote a multipart/form-data parser and the only character
set which preserved
binary data was ISO-8859-1. Conversions between bytes and characters only
work with this encType, your input and output should both use this if you
use characters to store binary data. 

Output streams are supposed to output bytes, the print in the
ServletOutputStream method converts a char to a byte array, you'd be better
off using the write(byte[] b) method of the base OutputStream class.


-----Original Message-----
From: Wolfgang.Kremser@bmi.gv.at [mailto:Wolfgang.Kremser@bmi.gv.at]
Sent: Wednesday, February 14, 2001 12:45 PM
To: tomcat-user@jakarta.apache.org
Subject: Hi Ho - Problem with ServletOutputStream in Tomcat


I ve created an Servlet that routes Requests and Responses to and from
another Server.

When i try to get a Image through this Servlet i get an Error 500. I coded
the app as described in the j2ee docu for sending binary data.

maybee a little code snipplet and the error trace helps to understand

http://127.0.0.1:8080/maria/portal/zmr/javalogo52x88.gif

this is the url -- http://127.0.0.1:8080 - is my Tomcat instance
/maria/portal - is my proxy servlet
/zmr/javalogo52x88.gif is the image i want to display in my browser -> but
/zmr is another webapplication on another tomcat server


heres the code for the binary data receiving and sending to the client
----------------
        // Setting the Headers for the Client same as the Servlet received
them from the other server
        while ((strHeaderKey = HttpUrlCon.getHeaderFieldKey(iCounter)) !=
null)
        {
            strHeaderValue = HttpUrlCon.getHeaderField(iCounter);

            LogIt("ResponseHeader - Value: " + strHeaderKey + " - " +
strHeaderValue);
            response.setHeader(strHeaderKey,strHeaderValue);

            iCounter +=1;
        }

	  // figuring out which type of data the servlet is getting
        if (HttpUrlCon.getContentType().equals("text/html"))
        {
	      // Text or HTML -> thats where i use the PrintWriter
            PrintWriter out = response.getWriter();
            int iByte;
            while ((iByte = brInput.read()) != -1)
            {
                out.print((char) iByte);
            }
        }
        else
        {
            try
            {
   	          // Everything else assuming its binary data so i use
ServletOutputStream
                ServletOutputStream out =
((ServletResponse)response).getOutputStream();
                int iByte;
                while ((iByte = brInput.read()) != -1)
                {
                    out.print((char) iByte);
                }
            }
            catch (IOException e)
            {
                this.log("IOException !!",e);
            }
        }
--------------------


heres the error trace i get when i try to process it -----

2001-02-14 01:26:43 - path="/maria" :proxy: ResponseHeader - Value:
Content-Type - image/gif
2001-02-14 01:26:43 - path="/maria" :proxy: ResponseHeader - Value:
Content-Length - 1495
2001-02-14 01:26:43 - path="/maria" :proxy: ResponseHeader - Value:
Last-Modified - Tue, 13 Feb 2001 10:07:22 GMT
2001-02-14 01:26:43 - path="/maria" :proxy: ResponseHeader - Value:
Servlet-Engine - Tomcat Web Server/3.2.1 (JSP 1.1; Servlet 2.2; Java 1.3.0;
Windows 2000 5.0 x86; java.vendor=Sun Microsystems Inc.)
2001-02-14 01:26:43 - path="/maria" :proxy: IOException !! -
java.io.IOException: Not an ISO 8859_1 character:^
	at
org.apache.tomcat.core.BufferedServletOutputStream.print(BufferedServletOutp
utStream.java:221)
	at
javax.servlet.ServletOutputStream.print(ServletOutputStream.java:177)
	at at.gv.bmi.maria.proxy.ReturnData(proxy.java:201)
	at at.gv.bmi.maria.proxy.doGet(proxy.java:63)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:740)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
	at
org.apache.tomcat.core.ServletWrapper.doService(ServletWrapper.java:404)
	at org.apache.tomcat.core.Handler.service(Handler.java:286)
	at
org.apache.tomcat.core.ServletWrapper.service(ServletWrapper.java:372)
	at
org.apache.tomcat.core.ContextManager.internalService(ContextManager.java:79
7)
	at
org.apache.tomcat.core.ContextManager.service(ContextManager.java:743)
	at
org.apache.tomcat.service.http.HttpConnectionHandler.processConnection(HttpC
onnectionHandler.java:210)
	at
org.apache.tomcat.service.TcpWorkerThread.runIt(PoolTcpEndpoint.java:416)
	at
org.apache.tomcat.util.ThreadPool$ControlRunnable.run(ThreadPool.java:498)
	at java.lang.Thread.run(Thread.java:484)


--------------------


please help me, its important and i dont know how to solve this problem - in
my opinion its a problem in the
org.apache.tomcat.core.BufferedServletOutputStream Class ?? why does it need
a ISO 8859_1 Charset for Binary Data ???

greetings 
Wolfgang Kremser

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