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From Filip Hanik - Dev Lists <devli...@hanik.com>
Subject Re: how to send http response in several chunked package with Tomcat
Date Wed, 27 Feb 2008 15:24:26 GMT
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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