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From Oleg Kalnichevski <ol...@apache.org>
Subject Re: Consuming chunk encoded data
Date Thu, 10 Oct 2013 08:21:00 GMT
On Wed, 2013-10-09 at 13:58 -0400, Chun Tat David Chu wrote:
> Hi all,
> 
> Is there an utility or a technique in HTTP Client that allows you to
> consume chunk encoded data whenever one chunk arrived on the wire?  Perhaps
> I overlooked this but I couldn't find anything related with this topic.
> 
> Here's what coming in over the wire.
> HttpResponseHandlerImpl.setContentType(): application/json
> HttpResponseHandlerImpl.setContentLength(): -1
> 58495 [main] DEBUG org.apache.http.wire  - << "24[\r][\n]"
> 58495 [main] DEBUG org.apache.http.wire  - <<
> "{"firstName":"David","lastName":"0"}"
> 58495 [main] DEBUG org.apache.http.wire  - << "[\r][\n]"
> 58495 [main] DEBUG org.apache.http.wire  - << "24[\r][\n]"
> 58495 [main] DEBUG org.apache.http.wire  - <<
> "{"firstName":"David","lastName":"1"}"
> 58495 [main] DEBUG org.apache.http.wire  - << "[\r][\n]"
> 58495 [main] DEBUG org.apache.http.wire  - << "24[\r][\n]"
> 58495 [main] DEBUG org.apache.http.wire  - <<
> "{"firstName":"David","lastName":"2"}"
> 58501 [main] DEBUG org.apache.http.wire  - << "[\r][\n]"
> 58501 [main] DEBUG org.apache.http.wire  - << "0[\r][\n]"
> 58501 [main] DEBUG org.apache.http.wire  - << "[\r][\n]"
> 
> What I want to do is to process a chunk at a time.  Is there any helper
> method that allows you to do this? or I just need to get the InputStream
> and do this manually?  Manually as in get the chunk size then read the
> buffer based on the chunk size.
> 
> Thanks!
> 
> David

David,
Chunk coding as well as other transfer encoding schemes are supposed to
be completely transparent to the application layer and therefore
HttpClient exposes no API related to transfer encodings.

If you are absolutely convinced that you have no other option but to
misuse / abuse HTTP protocol in this way, you will have to implement
your own APIs that interact directly with the SessionInputBuffer of the
underlying HTTP connection.

Oleg 



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