Re: Comet explicit event close
On Tuesday 09 February 2010 07:11:40 you wrote:
> Hi,
> I am Using a Socket client to send a http request to sever and then waits
> to read response from the socket inputstream..
>
> 1. I have a comet servlet. On its read event it starts a new thread passing
> the request and response object.
>
> 2.The read event code block then returns.
> 3. The thread started in the read event starts writing the responses in the
> response stream.
> PrintWriter writer =response.getWriter();
> writer.write("asynresponse");
>
> 4. after writing say 5 responses i want to just close the request and
> response (not the socket which sent the request)
> Sending header Connection:close closes the Socket
>
> How do i do this?
>
> Since i cannot trigger the Comet servlet END event explicitly, where/how
> can I call event.close();
>
> I tried passing the event object from the read event to the thread and
> called event.close in the thread. But an exception was
> thrown saying event object is no longer associated with the request and
> response.
>
> Thanks,
> Animesh
Why are you starting a new thread instead of writing the response and calling
event.close() from the thread in which event(CometEvent) is called?
> P.S: BTW Kudos to the forum. Is is so alive. have been sending queries
> since some days and got replies.
> Also just to let u know i have a business problem where a http request and
> response are to be served using comet asyncronously on the same socket
> connection.
>
> So i have a single socket client which wants to send http request again and
> again (pipeline) and waits for a asyn response from the comet server.
> trying a POC for the same.
> Any ideas for concrete pipelining clients would be greatly appreciated.
>
> Thanks,
> Animesh
>
--
Stephen Byrne
step...@lincware.com
(585) 286-5817
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Re: Comet Client Example
On 2/8/2010 5:36 AM, Animesh Sonkar wrote:
> Looked around all the forums for a well working example for Comet Client.
Here is some code I wrote to test a CometProcessor:
Using HttpURLConnection:
URL url = new URL( "http://"; );
HttpURLConnection connection = (HttpURLConnection)
url.openConnection();
connection.setChunkedStreamingMode( 1 );
connection.setDoOutput( true );
connection.setDoInput( true );
connection.connect();
OutputStream os = connection.getOutputStream();
while ( true ) {
os.write( 1 );
os.flush();
Thread.sleep( 1000 );
}
os.write( 0 );
os.flush();
os.close();
connection.disconnect();
Using sockets:
try {
Socket socket;
try {
socket = new Socket( "1.2.3.4", 8911 );
} catch ( Exception e ) {
log.error( e.getMessage(), e );
return;
}
OutputStream out = null;
PrintWriter pw = null;
BufferedReader in = null;
try {
out = socket.getOutputStream();
pw = new PrintWriter( out, true );
in = new BufferedReader(
new InputStreamReader(
socket.getInputStream() ) );
pw.print( "POST /cometProcessor HTTP/1.1" );
pw.print( CRLF );
pw.print( "Host: example.com" );
pw.print( CRLF );
pw.print( "Accept: image/png,image/*;q=0.8,*/*;q=0.5" ); // fixme
pw.print( CRLF );
pw.print( "Accept-Language: en-us,en;q=0.5" );
pw.print( CRLF );
pw.print( "Accept-Encoding: gzip,deflate" ); // fixme
pw.print( CRLF );
pw.print( "Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7" );
pw.print( CRLF );
pw.print( "Connection: keep-alive" );
pw.print( CRLF );
pw.print( "Content-Type: text/plain" );
pw.print( CRLF );
pw.print( "Transfer-Encoding: chunked" );
pw.print( CRLF );
pw.print( CRLF );
pw.flush();
out.flush();
// send a byte every second.
log.debug( "Send a byte every second. . ." );
while ( true ) {
pw.print( "01" ); // chunk size
pw.print( CRLF );
pw.print( "A" );
pw.print( CRLF );
pw.flush();
Thread.sleep( 1000 );
}
pw.print( "0" ); // end of chunks
pw.print( CRLF );
pw.print( CRLF ); // end of request.
pw.flush();
Thread.sleep( 1000 );
} finally {
if ( in != null ) {
try {
String s;
log.debug( "RESPONSE" );
while ( ( s = in.readLine() ) != null ) {
log.debug( s );
}
log.debug( "END" );
in.close();
} catch ( Exception e ) {
log.warn( e.getMessage(), e );
}
}
if ( out != null ) {
try {
out.close();
} catch ( IOException e ) {
}
}
if ( socket != null ) {
try {
socket.close();
} catch ( IOException e ) {
}
}
}
}
--
Stephen Byrne
step...@lincware.com
(585) 286-5817
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Re: Configuring two connectors and COMET Read event
Animesh Sonkar wrote: *snip* > 2. I am not able to invoke the READ event. How do i do that? You need to send the HTTP request as chunked data. If you happen to be using an HttpURLConnection, call setChunkedStreamingMode( 1 ). If you are taking a lower level approach, (i.e. using sockets), send a header "Transfer-Encoding: chunked", and send CRLF and flush your stream between chunks. *snip* > Thanks, > Animesh. -- Stephen Byrne step...@lincware.com (585) 286-5817 - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
Re: CometProcessor proxied through Apache httpd
Robin Wilson wrote:
Where are you putting the ProxyPass (which file, where in the file)?
Also, did you have this in the file somewhere before the ProxyPass:
LoadModule proxy_ajp_module modules/mod_proxy_ajp.so
AND... In your Apache "modules" directory, is there a 'mod_proxy_ajp.so' file?
Lastly, this is what our connector looks like in the 'server.xml' file for the
tomcat instance:
So I'm not sure if the 'address' is causing the problem or not.
Keep in mind, 'proxy' (and AJP) don't work the same as HTTP exactly. The
rewrites will just re-point your browser to use the new URL (so rewriting to an
'ajp://' protocol will break the browser - since it doesn't speak 'ajp'
protocol). The proxy actually passes the request _through_ the Apache HTTP
process - to the Tomcat's AJP process - so the browser only talks 'http' to the
Apache service, while Apache talks 'ajp' to the Tomcat service. It's the
difference of:
Browser --HTTP request--> Apache
Browser <--HTTP (redirect to Tomcat path)-- Apache
Browser --HTTP request--> Tomcat
Browser <--HTTP response-- Tomcat
vs.
Browser --HTTP request--> Apache --AJP (proxied request)--> Tomcat
Browser <--HTTP response-- Apache <--AJP (proxied response)-- Tomcat
(I'll admit, I could be wrong on this - but that's how I think it works...)
I do have proxy_ajp_module loaded.
I have the ProxyPass (or RewriteRule) in a
The [P] at the end of the RewriteRule causes Apache to pass the request
through the proxy - not to send a redirect to the browser.
Have you successfully used a CometProcessor behind an AJP proxy?
-Stephen
--
Robin D. Wilson
Director of Web Development
KingsIsle Entertainment, Inc.
CELL: 512-426-3929
DESK: 512-623-5913
www.KingsIsle.com
-Original Message-
From: Stephen Byrne [mailto:step...@lincware.com]
Sent: Wednesday, January 27, 2010 9:54 AM
To: Tomcat Users List
Subject: Re: CometProcessor proxied through Apache httpd
Robin Wilson wrote:
Have you tried using mod_proxy_ajp?
ProxyPass /some/path ajp://tomcat.host.domain:8009/some/other/path
Yes, I did try this, and got the same results as using RewriteRule - a
405 error.
--
Robin D. Wilson
Director of Web Development
KingsIsle Entertainment, Inc.
CELL: 512-426-3929
DESK: 512-623-5913
www.KingsIsle.com
-Original Message-
From: Stephen Byrne [mailto:step...@lincware.com]
Sent: Wednesday, January 27, 2010 9:27 AM
To: users@tomcat.apache.org
Subject: CometProcessor proxied through Apache httpd
Is there a way to get CometProcessor to work when proxying through
Apache httpd? Here is what I have tried:
I have an HttpServlet implementing CometProcessor.
When I have a Tomcat connector like this:
and I connect to it directly, everything works wonderfully - I get
CometEvent.EventType.READ events as I send data from the client.
When I have a Tomcat connector like this:
and have Apache httpd proxy requests like this:
RewriteRule ^/path/to/servlet http://localhost:8911/path/to/servlet [P]
I get exactly one CometEvent.EventType.READ event with all of the data
after I finish sending data from the client.
When I have a Tomcat connector like this:
and have Apache httpd proxy requests like this:
RewriteRule ^/path/to/servlet ajp://localhost:8909/path/to/servlet [P]
I get zero CometEvents and the client gets an HTTP error 405 (Method Not
Allowed). I was hoping that AJP would work so I could try using
ProxyPass with flushpackets=on, but the Apache documentation says that
only works with AJP.
If I use Http11NioConnector instead of HTTP/1.1 and try to proxy with
Apache, I get the same results as if I were using the HTTP/1.1 connector.
My client code (Java) is:
// Direct to Tomcat (HTTP)
//URL url = new URL( "http://server:8912/path/to/servlet"; );
// Apache proxies to Tomcat
URL url = new URL( "http://server/path/to/servlet"; );
HttpURLConnection connection = (HttpURLConnection)
url.openConnection();
connection.setChunkedStreamingMode( 1 );
connection.setDoOutput( true );
connection.setDoInput( true );
connection.connect();
OutputStream os = connection.getOutputStream();
for ( int i = 0; i < 10; i++ ) {
os.write( 1 );
os.flush();
Thread.sleep( 1000 );
}
os.close();
log.debug( "response:" + connection.getResponseCode() );
log.debug( "response:" + connection.getResponseMessage() );
connection.disconnect();
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Re: CometProcessor proxied through Apache httpd
Robin Wilson wrote:
Have you tried using mod_proxy_ajp?
ProxyPass /some/path ajp://tomcat.host.domain:8009/some/other/path
Yes, I did try this, and got the same results as using RewriteRule - a
405 error.
--
Robin D. Wilson
Director of Web Development
KingsIsle Entertainment, Inc.
CELL: 512-426-3929
DESK: 512-623-5913
www.KingsIsle.com
-Original Message-
From: Stephen Byrne [mailto:step...@lincware.com]
Sent: Wednesday, January 27, 2010 9:27 AM
To: users@tomcat.apache.org
Subject: CometProcessor proxied through Apache httpd
Is there a way to get CometProcessor to work when proxying through
Apache httpd? Here is what I have tried:
I have an HttpServlet implementing CometProcessor.
When I have a Tomcat connector like this:
and I connect to it directly, everything works wonderfully - I get
CometEvent.EventType.READ events as I send data from the client.
When I have a Tomcat connector like this:
and have Apache httpd proxy requests like this:
RewriteRule ^/path/to/servlet http://localhost:8911/path/to/servlet [P]
I get exactly one CometEvent.EventType.READ event with all of the data
after I finish sending data from the client.
When I have a Tomcat connector like this:
and have Apache httpd proxy requests like this:
RewriteRule ^/path/to/servlet ajp://localhost:8909/path/to/servlet [P]
I get zero CometEvents and the client gets an HTTP error 405 (Method Not
Allowed). I was hoping that AJP would work so I could try using
ProxyPass with flushpackets=on, but the Apache documentation says that
only works with AJP.
If I use Http11NioConnector instead of HTTP/1.1 and try to proxy with
Apache, I get the same results as if I were using the HTTP/1.1 connector.
My client code (Java) is:
// Direct to Tomcat (HTTP)
//URL url = new URL( "http://server:8912/path/to/servlet"; );
// Apache proxies to Tomcat
URL url = new URL( "http://server/path/to/servlet"; );
HttpURLConnection connection = (HttpURLConnection)
url.openConnection();
connection.setChunkedStreamingMode( 1 );
connection.setDoOutput( true );
connection.setDoInput( true );
connection.connect();
OutputStream os = connection.getOutputStream();
for ( int i = 0; i < 10; i++ ) {
os.write( 1 );
os.flush();
Thread.sleep( 1000 );
}
os.close();
log.debug( "response:" + connection.getResponseCode() );
log.debug( "response:" + connection.getResponseMessage() );
connection.disconnect();
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CometProcessor proxied through Apache httpd
Is there a way to get CometProcessor to work when proxying through
Apache httpd? Here is what I have tried:
I have an HttpServlet implementing CometProcessor.
When I have a Tomcat connector like this:
and I connect to it directly, everything works wonderfully - I get
CometEvent.EventType.READ events as I send data from the client.
When I have a Tomcat connector like this:
and have Apache httpd proxy requests like this:
RewriteRule ^/path/to/servlet http://localhost:8911/path/to/servlet [P]
I get exactly one CometEvent.EventType.READ event with all of the data
after I finish sending data from the client.
When I have a Tomcat connector like this:
and have Apache httpd proxy requests like this:
RewriteRule ^/path/to/servlet ajp://localhost:8909/path/to/servlet [P]
I get zero CometEvents and the client gets an HTTP error 405 (Method Not
Allowed). I was hoping that AJP would work so I could try using
ProxyPass with flushpackets=on, but the Apache documentation says that
only works with AJP.
If I use Http11NioConnector instead of HTTP/1.1 and try to proxy with
Apache, I get the same results as if I were using the HTTP/1.1 connector.
My client code (Java) is:
// Direct to Tomcat (HTTP)
//URL url = new URL( "http://server:8912/path/to/servlet"; );
// Apache proxies to Tomcat
URL url = new URL( "http://server/path/to/servlet"; );
HttpURLConnection connection = (HttpURLConnection)
url.openConnection();
connection.setChunkedStreamingMode( 1 );
connection.setDoOutput( true );
connection.setDoInput( true );
connection.connect();
OutputStream os = connection.getOutputStream();
for ( int i = 0; i < 10; i++ ) {
os.write( 1 );
os.flush();
Thread.sleep( 1000 );
}
os.close();
log.debug( "response:" + connection.getResponseCode() );
log.debug( "response:" + connection.getResponseMessage() );
connection.disconnect();
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