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https://issues.apache.org/jira/browse/CAMEL-7638?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14550064#comment-14550064
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Ralf Steppacher commented on CAMEL-7638:
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[[email protected]], setting {{disableStreamCache=true}} only effects
the http consumers, but not the procuders.
All http producers that I am aware of (Jetty, http4, netty-http) read the
response stream into a byte-array, wrap it in an InputStream and place that in
the exchange body. Thus a large http response blows a proxy route out of the
water. None of the producers seem to offer an option to make them put the
original socket input stream into the exchange.
{{http4}}: Everything happens in
org.apache.camel.component.http4.HttpProducer::process() ->
populateResponse(..) -> extractResponseBody(..) ->
doExtractResponseBodyAsStream(); here the original stream is copied into an
instance of CachedOutputStream, backed by a byte-array.
{{Jetty}}: org.eclipse.jetty.client.AsyncHttpConnection::handle() ->
org.eclipse.jetty.http.HttpParser::parseNext() will fill a byte-array in
org.eclipse.jetty.client.ContentExchange which is a CachedExchange which is a
HttpExchange.
{{netty-http}}: Builds a pipeline that assembles the HttpResponse content as a
composite ChannelBuffer. The wrapped channel buffers make up the complete
response stream.
> Use response input stream directly in http producer
> ---------------------------------------------------
>
> Key: CAMEL-7638
> URL: https://issues.apache.org/jira/browse/CAMEL-7638
> Project: Camel
> Issue Type: Improvement
> Reporter: Willem Jiang
> Assignee: Willem Jiang
>
> It could save us lots of the memory and time if the response is a big and
> chunked message.
> Here are some discussion in the mailing list about it.
> http://camel.465427.n5.nabble.com/Stream-only-reverse-proxy-with-minimal-memory-footprint-tp5754424.html
>
> http://camel.465427.n5.nabble.com/Chunking-issue-with-http-producer-td5735075.html
>
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