Nicolas Schwartz wrote:
I'm trying to get the information of sending the last byte of a file through
Tomcat.
I've done many tests, I've looked in the archives and nothing came up.
So I'm thinking that maybe I'm not posting where I should, if it is so, please
tell me so and tell me where I could find the info.
I know this mailing list is about configuration but here is what I do and the
configuration:
I'm doing a loop with a FileInputStream and writing each byte to the
OutputStream I got from my HttpServletResponse.
No Exception or whatever is thrown when I kill the connection once the url has
been requested.
I use apache and tomcat. They're connected with the ajp13 connector.
I've looked in the connector configuration (workers.properties) options but
found nothing.
Any help, hint , ... would be greatly appreciated :)
I read this to mean you want to emit a file in a HTTP response and the
APIs are you using are not Tomcat specific.
Check out the InputStream interface at
http://java.sun.com/j2se/1.4.2/docs/api/java/io/InputStream.html
byte[] b = new byte[4096];
for(;;) {
int l;
if((l = fileInputStream.read(b, 0, b.length)) == -1) {
break; // No more data from file
}
response.getOutputStream().write(b, 0, l);
}
response.getOutputStream().flush(); // So we see exception in our
Servlet code
The "kill the connection" bit is a bit confusing, you mean you are
testing the premature killing of a client connection of a partically
downloaded file.
It depends how the connection is killed on when you will see the
exception, for example if a network socket level reset is performed then
some form of IOException should be thrown during the
getOutputStream.print("") or during a flush() or close().
If your servlet does not explicitly do the flush() or close() on the
data it wrote but terminates the HttpServlet.doGet() method then you
leave it upto the container to complete the flushing. Then you may not
see any exception as the container may just deal with it and eat it up.
If you are not killing the connection off at the network level then it
may take Tomcat sometime to automatically kill it off through normal
network level dead socket detection (max retry / keepalive failure).
HTH
Darryl
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