- From: Julian Reschke <julian.reschke@gmx.de>
- Date: 2012年7月12日 19:09:44 +0200
- To: James M Snell <jasnell@gmail.com>
- CC: Phillip Hallam-Baker <hallam@gmail.com>, Nico Williams <nico@cryptonector.com>, ietf-http-wg@w3.org
- Message-ID: <4FFF04D8.8000403@gmx.de>
On 2012年07月12日 19:00, James M Snell wrote:
> To provide one example... using the servlet API within Apache Tomcat
> 7... I can easily access trailers included in a post.. but there is no
> obvious means of including a trailer in the response...
>
> Given the input...
>
> POST /Testing/test HTTP/1.1
> Host: localhost
> Transfer-Encoding: chunked
> Content-Type: text/plain
> Trailer: x-foo
> TE: chunked
>
> 4
> ABCD
> 6
> EFGHIJ
> 0
> x-foo: test
>
> On the server side...
>
> protected void doPost(
> HttpServletRequest request,
> HttpServletResponse response)
> throws IOException {
>
> // outputs null since the trailer hasn't been parsed yet...
> System.out.println(request.getHeader("x-foo"));
>
> // consume the input
> InputStream in = request.getInputStream();
> int r = -1;
> while((r = in.read(new byte[100])) > -1) {}
>
> // outputs the value of the x-foo trailer... so far so good...
> System.out.println(request.getHeader("x-foo"));
>
> // let's do a chunked response and try that...
> response.addHeader("Trailer", "x-foo");
> OutputStream out = response.getOutputStream();
> for (int n = 0; n < 10000; n++) {
> out.write('a');
> }
> // x-foo is never included in the response...
> // there is no obvious means of including trailers
> // in chunked responses using the servlet api...
> response.addHeader("x-foo", "response");
> }
> ...
I have to say that I'm surprised that at least it works for trailers in
a HttpServletRequest...
Best regards, Julian
Received on Thursday, 12 July 2012 17:10:24 UTC