Re: JSR311: entity provider

From: Stephan Koops <>
Date: Sat, 19 Jul 2008 11:41:48 +0200

Hi Marc,
>> sorry, you misunderstood me; perhaps I wrote not clear enough.
>> It was meant for a message body READER. Must the InputStream (given
>> to the message body reader by the runtime) reaches its end, if the
>> length is reached, or must every provider check the length from the
>> content-length header and stop itself.
>> If the runtime environment gives only an InputStream with the length
>> the provider should read, than the message body readers are easier to
>> implement and could be used to read "multipart/whatever" data. Then
>> the multipart provider only must ensure, that the InputStream given
>> to the readers for every part closes, if the length of the content of
>> this part is reached.
> Seems a little heavyweight to me.
Someone must ensure that the InputStream ends. In HTTP/1.0 it's the
really end of the InputStream. In HTTP/1.1 someone must be responsible
to stop reading from the net. If the JAX-RS runtime environment must
ensure this (perhaps the used http container ensures it), then the
message body readers are very simple. I think this is the way it works
now; but I found now definition of it in the spec or javadoc.

The multipart/whatever provider is enhanced, and not a part for the
specifcation and not required for a runtime environment. It should only
show other possibilities for it.

best regards