On Wed, 2012-02-08 at 19:10 -0800, Warren Bell wrote:
> I am writing a small proxy servlet and want to know what is the best way
> to convert the entity from an org.apache.http.HttpResponse, I am getting
> from a destination server through HttpClient, into the
> javax.servlet.http.HttpServletResponse outputStream I need in my servlet
> to send back to the client's browser. I am currently doing something
> like this below, but I am running into issues with chunked data.
>
> I have already transferred all response headers from
> orgApacheHttpHttpResponse to javaxServletHttpHttpServletResponse before
> the code below.
>
> ...
>
> HttpEntity entity = orgApacheHttpHttpResponse.getEntity();
>
> InputStream inputStream = null;
> try
> {
> inputStream = entity.getContent();
> BufferedInputStream bufferedInputStream = new
> BufferedInputStream(inputStream);
> OutputStream outputStream =
> javaxServletHttpHttpServletResponse.getOutputStream();
> int intNextByte;
> while((intNextByte = bufferedInputStream.read()) != -1)
> {
> outputStream.write(intNextByte);
> }
> }
> catch(IOException ioex)
> {
> ...
> }
> catch(RuntimeException rex)
> {
> ...
> }
> finally
> {
> Close all streams
> }
>
>
> The code above does work when I manually exclude the "Transfer-Encoding:
> chunked" header from the javax.servlet.http.HttpServletResponse, but am
> I suppose to do that ?
Yes, you are. There are so called 'hop-by-hop' headers that MAY NOT be
transmitted by HTTP proxies to the next hop. See RFC 2616, section
13.5.1: 'End-to-end and Hop-by-hop Headers'.
Oleg
> Basically the response that comes back to the
> client's browser should be the same as the response that comes back to
> HTTPClient in my servlet.
>
> Also, are there any response headers that I should not transfer over to
> javax.servlet.http.HttpServletResponse like maybe Transfer-Encoding ?
> Are there headers that get added by the web server after my response has
> left the servlet ?
>
>
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