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From Oleg Kalnichevski <ol...@apache.org>
Subject Re: How to get an output stream from already established connection in HttpComponents Client 4.0
Date Thu, 21 Oct 2010 21:23:41 GMT
On Wed, 2010-10-20 at 23:45 -0700, AT Pune wrote:
> Hi,
> 
> I upload a large file (>4GB in chunks) in a single http connection and by
> opening the output stream just once. To do this I've used HttpClient 3.1 API
> and have done this.
> 
> 1. Extended the RequestEntity to create a chunked entity class that has the
> getContentLength(), getContentType() etc methods.
> 2. Extended the EntityEnclosingMethod to create a PostMethod like class
> "ChunkedPostMethod". And in its constructor called the setRequestEntity()
> method passing the chunked entity class as parameter.
> 3. In the "ChunkedPostMethod", in the writeRequestBody(HttpState state,
> HttpConnection conn) I get the handle of OutputStream using
> conn.getRequestOutputStream(), and in the readResponseBody(HttpState state,
> HttpConnection conn) I get the handle of InputStream using
> conn.getResponseInputStream().
> 
> I use this "ChunkedPostMethod" to connect to the Http server. These input
> stream and output stream handles I maintain until all the chunks are
> transfered using these.
> 
> All this I've achieved with HttpClient3.1. But I'm not able to convert this
> code to HttpComponents Client 4.1 as the equivalent of EntityEnclosingMethod
> in httpclient4.0 is HttpEntityEnclosingRequestBase but that does not provide
> any method (like writeRequestBody and readResponseBody) that provides the
> after-connection outputstream and inputstream handles.
> 
> First of all is there any way of getting the outputstream from the http
> connection in httpclient4.0? If yes then how?
> 
> Thanks in advance,
> Anurag

What is wrong with just writing out the content of the file into
OutputStream instance passed as a parameter to the HttpEntity#writeTo
method?

Oleg


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