"Steve McCarthy" <[EMAIL PROTECTED]> wrote:
> [EMAIL PROTECTED] wrote:
>
>> Steve,
>>
>> In 8916 - if you use:
>>
>> service() {
>> w= new PrintWriter( response.getOutputStream );
>> w.println(...)
>> }
>>
>> If you don't flush, then you'll get no output.
>>
>> That's not because of the servlet spec - but because of the way
>> PrintWriter works, it'll put your output in a buffer and that'll not be
>> written to the output stream.
>>
> Please note that the example uses a PrintWriter, and not a
> BufferedWriter. Looking at the source of PrintWriter, all of the
> println() methods write the data to the underlying OutputStream -
> characters are not buffered Writer level. If there is any buffering, it
> occurs in the OutputStream provided by the container, and is therefore
> available to the container.
>
> It isn't any different than obtaining the OutputStream from the
> container, writing bytes to it, and then not calling flush on the
> OutputStream:
>
> service(...) {
> OutputStream os = response.getOutputStream();
> byte arr[] = ".......".getBytes();
> os.write(arr);
> // no os.flush();
> }
Hmm... That actually (I tried it) works on 4.0.3 with the HTTP connector (I
have my doubts about Coyote, it simply crashes with an NPE)... Look:
import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
public class Steve extends HttpServlet {
public void service(HttpServletRequest req, HttpServletResponse res)
throws IOException, ServletException {
OutputStream os = res.getOutputStream();
byte arr[] = ".......".getBytes();
os.write(arr);
}
}
[pier@blossom] ~ $ telnet localhost 8080
Trying 127.0.0.1...
Connected to localhost.betaversion.org.
Escape character is '^]'.
GET /servlet/Steve HTTP/1.1
Host: localhost:8080
Connection: close
HTTP/1.1 200 OK
Date: Fri, 10 May 2002 00:19:12 GMT
Server: Apache Tomcat/4.0.3 (HTTP/1.1 Connector)
Connection: close
.......Connection closed by foreign host.
[pier@blossom] ~ $
The problem _I_ had with AvantGo is the following: Given this _very_ stupid
but _very_ valid servlet:
import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
public class Test extends HttpServlet {
public void doGet(HttpServletRequest req, HttpServletResponse res)
throws IOException, ServletException {
res.setStatus(302);
res.setContentLength(0);
res.setHeader("Location","http://www.vnunet.com/PDARedirected";);
}
}
Check out what the _hell_ does happen... (I'm doing it with keep alive so
you'll get the extent of the damage):
[pier@blossom] ~ $ telnet localhost 8080
Trying 127.0.0.1...
Connected to localhost.betaversion.org.
Escape character is '^]'.
GET /servlet/Test HTTP/1.1
Host: localhost:8080
HTTP/1.1 302 Moved Temporarily
Content-Type: text/html
Content-Length: 0
Date: Fri, 10 May 2002 00:25:16 GMT
Location: http://www.vnunet.com/PDARedirected
Server: Apache Tomcat/4.0.3 (HTTP/1.1 Connector)
<html><head><title>Apache Tomcat/4.0.3 - Error
report</title><STYLE><!--H1{font-family : sans-serif,Arial,Tahoma;color :
white;background-color : #0086b2;} BODY{font-family :
sans-serif,Arial,Tahoma;color : black;background-color : white;} B{color :
white;background-color : #0086b2;} HR{color : #0086b2;} --></STYLE>
</head><body><h1>Apache Tomcat/4.0.3 - HTTP Status 302 - Moved
Temporarily</h1><HR size="1" noshade><p><b>type</b> Status
report</p><p><b>message</b> <u>Moved
Temporarily</u></p><p><b>description</b> <u>The requested resource (Moved
Temporarily) has moved temporarily to a new location.</u></p><HR size="1"
noshade></body></html>GET /servlet/Test HTTP/1.1
Host: localhost:8080
HTTP/1.1 302 Moved Temporarily
Content-Type: text/html
Content-Length: 0
Date: Fri, 10 May 2002 00:25:24 GMT
Location: http://www.vnunet.com/PDARedirected
Server: Apache Tomcat/4.0.3 (HTTP/1.1 Connector)
<html><head><title>Apache Tomcat/4.0.3 - Error
report</title><STYLE><!--H1{font-family : sans-serif,Arial,Tahoma;color :
white;background-color : #0086b2;} BODY{font-family :
sans-serif,Arial,Tahoma;color : black;background-color : white;} B{color :
white;background-color : #0086b2;} HR{color : #0086b2;} --></STYLE>
</head><body><h1>Apache Tomcat/4.0.3 - HTTP Status 302 - Moved
Temporarily</h1><HR size="1" noshade><p><b>type</b> Status
report</p><p><b>message</b> <u>Moved
Temporarily</u></p><p><b>description</b> <u>The requested resource (Moved
Temporarily) has moved temporarily to a new location.</u></p><HR size="1"
noshade></body></html>^]
telnet> close
Connection closed.
[pier@blossom] ~ $
My servlet _says_ it's a 302, temporary redirect, my servlet _says_ the
content length is 0, my servlet doesn't touch even barely the stupid stream
because it got nothing to do with the sucker, and then, I still get back
some text, _AND_ the Content-Length saying that there MUST NOT BE...
This _screws_ up all my requests... Allloooffftthhheemmmm... Keep alive is
dropped, and mess mess mess on all PDAs...
ARRRRGGGGHHHH I hate the ErrorReporterCrap...
Pier
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