AW: Hi Ho - Problem with ServletOutputStream in Tomcat
Ok thx for all your help - i found the problem - or more correct i read the
infos a 10th time about InputStreamReader - and now i found the info about
conversion of the characters -- i am veerrryy blind
thx
Wolfgang Kremser
-Ursprüngliche Nachricht-
Von: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]
Gesendet: Freitag, 16. Februar 2001 09:12
An: [EMAIL PROTECTED]
Betreff: AW: Hi Ho - Problem with ServletOutputStream in Tomcat
well i use a HTTPUrlConnection - and theres a getInputStream method which
brings me my inputstream.
I dont see any info about char-conversion with this method
here's the missing code snippet ---
InputStreamReader brInput = new
InputStreamReader(HttpUrlCon.getInputStream());
---
greetings Wolfgang
-Ursprüngliche Nachricht-
Von: Randy Layman [mailto:[EMAIL PROTECTED]]
Gesendet: Mittwoch, 14. Februar 2001 16:28
An: [EMAIL PROTECTED]
Betreff: RE: Hi Ho - Problem with ServletOutputStream in Tomcat
What kind of translation is happening? Are you getting a few extra
bytes here and there, are all (or some) shifting by a few bits?
Just guess - I don't see where you get your inpustream, make sure
that you aren't using a stream that expects to work with characters and is
doning some form of character translation. (Any class that has a readLine
or readString method is suspect to fiddling with the bytes).
Randy
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]
Sent: Wednesday, February 14, 2001 8:39 AM
To: [EMAIL PROTECTED]
Subject: AW: Hi Ho - Problem with ServletOutputStream in Tomcat
thx for your info
i used write but my next problem is that the binary content gets somehow
translated and isnt the same as before - for example gif images arent
displayed correctly --- pdf are displayed wrong -- and so on ... well i dont
have a clue why.
greetings Wolfgang
-Ursprüngliche Nachricht-
Von: Samson, Lyndon [IT] [mailto:[EMAIL PROTECTED]]
Gesendet: Mittwoch, 14. Februar 2001 14:32
An: '[EMAIL PROTECTED]'
Betreff: RE: Hi Ho - Problem with ServletOutputStream in Tomcat
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: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]
Sent: Wednesday, February 14, 2001 12:45 PM
To: [EMAIL PROTECTED]
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
AW: Hi Ho - Problem with ServletOutputStream in Tomcat
well i use a HTTPUrlConnection - and theres a getInputStream method which
brings me my inputstream.
I dont see any info about char-conversion with this method
here's the missing code snippet ---
InputStreamReader brInput = new
InputStreamReader(HttpUrlCon.getInputStream());
---
greetings Wolfgang
-Ursprüngliche Nachricht-
Von: Randy Layman [mailto:[EMAIL PROTECTED]]
Gesendet: Mittwoch, 14. Februar 2001 16:28
An: [EMAIL PROTECTED]
Betreff: RE: Hi Ho - Problem with ServletOutputStream in Tomcat
What kind of translation is happening? Are you getting a few extra
bytes here and there, are all (or some) shifting by a few bits?
Just guess - I don't see where you get your inpustream, make sure
that you aren't using a stream that expects to work with characters and is
doning some form of character translation. (Any class that has a readLine
or readString method is suspect to fiddling with the bytes).
Randy
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]
Sent: Wednesday, February 14, 2001 8:39 AM
To: [EMAIL PROTECTED]
Subject: AW: Hi Ho - Problem with ServletOutputStream in Tomcat
thx for your info
i used write but my next problem is that the binary content gets somehow
translated and isnt the same as before - for example gif images arent
displayed correctly --- pdf are displayed wrong -- and so on ... well i dont
have a clue why.
greetings Wolfgang
-Ursprüngliche Nachricht-
Von: Samson, Lyndon [IT] [mailto:[EMAIL PROTECTED]]
Gesendet: Mittwoch, 14. Februar 2001 14:32
An: '[EMAIL PROTECTED]'
Betreff: RE: Hi Ho - Problem with ServletOutputStream in Tomcat
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: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]
Sent: Wednesday, February 14, 2001 12:45 PM
To: [EMAIL PROTECTED]
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 -
AW: Hi Ho - Problem with ServletOutputStream in Tomcat
ok thanx for your info -- i didnt notice that ServletOutputStream has a
write method :)
and about speed - its my first catch -- i ll improve speed after i know that
this way works .)
greetings
Wolfgang Kremser
-Ursprüngliche Nachricht-
Von: Randy Layman [mailto:[EMAIL PROTECTED]]
Gesendet: Mittwoch, 14. Februar 2001 13:48
An: [EMAIL PROTECTED]
Betreff: RE: Hi Ho - Problem with ServletOutputStream in Tomcat
I think your problem might be because you are trying to print bytes
cast to characters. Try using the write method instead.
Also, to get a speed up I would suggest reading and writing arrays
of bytes at a time (maybe 500 to 2000 bytes) - it greatly reduces the number
of system calls involved.
Randy
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]
Sent: Wednesday, February 14, 2001 7:45 AM
To: [EMAIL PROTECTED]
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 proble
AW: Hi Ho - Problem with ServletOutputStream in Tomcat
thx for your info
i used write but my next problem is that the binary content gets somehow
translated and isnt the same as before - for example gif images arent
displayed correctly --- pdf are displayed wrong -- and so on ... well i dont
have a clue why.
greetings Wolfgang
-Ursprüngliche Nachricht-
Von: Samson, Lyndon [IT] [mailto:[EMAIL PROTECTED]]
Gesendet: Mittwoch, 14. Februar 2001 14:32
An: '[EMAIL PROTECTED]'
Betreff: RE: Hi Ho - Problem with ServletOutputStream in Tomcat
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: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]
Sent: Wednesday, February 14, 2001 12:45 PM
To: [EMAIL PROTECTED]
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:4
