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From "Hanks Wang (hanwan)" <han...@cisco.com>
Subject RE: how to send http response in several chunked package with Tomcat
Date Thu, 28 Feb 2008 14:25:49 GMT
Hi Filip,

Yes it works. Thanks a lot!

Christopher, in fact I'm writing a servlet to fool a management
software, So I need make sure the servlet response is as close to real
device as possible.

Thanks for everyone's help.

B.R
Han
-----Original Message-----
From: Filip Hanik - Dev Lists [mailto:devlists@hanik.com] 
Sent: Wednesday, February 27, 2008 11:24 PM
To: Tomcat Users List
Subject: Re: how to send http response in several chunked package with
Tomcat

you don't need to do that, tomcat does it for you.
all you need to do is

while (havedata) {
  response.getOutputStream().println(some data)
  response.flushBuffer()
}

and tomcat takes care of the rest

Filip

Hanks Wang (hanwan) wrote:
> Hi Johnny,
>
> I try below method implement the chunk in code:
>
> String tmp = "something very long";
>
> String hlen = Integer.toHexString(tmp.length());
> hlen = hlen +"\r\n" + tmp.toString();
> String chunkend = Integer.toHexString(0)+"\r\n"; 
> response.getOutputStream().println(hlen);
> response.getOutputStream().println(chunkend);
>
> I created two http chunk successfully by this way. The first chunk is 
> the data which wraps tmp, the second is the end chunk.
>
> But the question is, all these chunk and http header are in same frame

> (get it from wireshark.).
>
> How can I put them in different frame?
> Which means we need 3 frame for the case: the first frame will carry 
> the http header, the second will carry the first chunk data, the last 
> frame will carry the end chunk.
>
> Does it mean I need control the tcp/ip protocol? It's impossible,
right?
>
> B.R
> Han
>
>  
>
> -----Original Message-----
> From: Hanks Wang (hanwan)
> Sent: Wednesday, February 27, 2008 3:40 PM
> To: Tomcat Users List
> Subject: RE: how to send http response in several chunked package with

> Tomcat
>
> Hi Johnny,
>
> Thanks a lot. I read the http RFC and find something like this:
>
> The chunk-size field is a string of hex digits indicating the size of 
> the chunk. The chunked encoding is ended by any chunk whose size is 
> zero, followed by the trailer, which is terminated by an empty line.
>
> Do u have any tutorial of ChunkedOutputFilter? I can't find anything 
> from its API document..
>
> Thanks
> Han
>
>
> -----Original Message-----
> From: Johnny Kewl [mailto:john@kewlstuff.co.za]
> Sent: Tuesday, February 26, 2008 7:41 PM
> To: Tomcat Users List
> Subject: Re: how to send http response in several chunked package with

> Tomcat
>
>
> ----------------------------------------------------------------------
> --
> ---
> HARBOR: http://coolharbor.100free.com/index.htm
> The most powerful application server on earth.
> The only real POJO Application Server.
> Making the Java dream come true.
> ----------------------------------------------------------------------
> --
> ---
> ----- Original Message -----
> From: "Hanks Wang (hanwan)" <hanwan@cisco.com>
> To: "Tomcat Users List" <users@tomcat.apache.org>
> Sent: Tuesday, February 26, 2008 12:02 PM
> Subject: how to send http response in several chunked package with 
> Tomcat
>
>
> Hi all,
>
> Is there a way to make tomcat generate http response in 
> chunked-encoding style?
>
> suppose I have a file resp.log and I can parse it in byte[], how can I

> send the byte array in several chunked package?
>
> --------
> Hanks I have just started looking at this, so no expert but I did 
> notice
>
> ChunkedInputFilter,ChunkedOutputFilter....
>
> I think your answer is in setting a filter.... in normal Http I notice

> that chunking happens automatically if header size ommited, but with 
> so much control of the socket I think you have to pump it thru a 
> filter and then there must be a way to say last chuck... and start 
> chuck...
> Short of that one would have to set headers themselves and add 
> trailing 0's and end sequences, so I think those classes are specific 
> to http11
>
> .... a guess
>
> Any suggestion is welcome!
>
> Thanks
> Han
>
>
>
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>
>
>   


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