Hello Jose,
Thanks a lot.
I suppose your app is a proxy. Then you should also manage the request
headers, and only send to server those headers that are not hop-by-hop.
In addition, I think you should remove those headers whose name is present
in the "Connection" header. This is my implementation (with request
headers):
private void setHeaders(HttpServletRequest request)
{
String connectionHeaderValue = null;
Enumeration<?> headerNames = request.getHeaderNames();
while (headerNames.hasMoreElements())
{
String headerName = (String)headerNames.nextElement();
// Obviamos las 'cookies', porque ya las hemos cogido antes.
if (!headerName.equalsIgnoreCase(GenericConstants.HEADER_COOKIE))
{
// Si es el 'Connection' header, no lo añado pero me quedo con su valor.
if (headerName.equalsIgnoreCase(GenericConstants.HEADER_CONNECTION))
connectionHeaderValue = request.getHeader(headerName);
else this.addHeader(headerName, request.getHeader(headerName));
}
}
// Al final de recoger todos los 'header', hay que eliminar aquellos cuyo
nombre esté incluído en 'connectionHeaderValue' (tiene los valores separados
por ",").
if (connectionHeaderValue != null)
{
String[] connectionHeaderNames =
connectionHeaderValue.split(GenericConstants.COMA_SEPARATOR);
for (String headerName : connectionHeaderNames)
this.headers.remove(headerName.trim().toLowerCase());
}
}
It's not tested yet. I'm working on it.
Regards,
Joan.
-----Mensaje original-----
De: Jose Escobar [mailto:[email protected]]
Enviado el: miércoles, 11 de julio de 2012 9:06
Para: HttpClient User Discussion
Asunto: Re: Headers
Hello Joan,
I didn't find any method to do this. This is my implementation:
public static final String[] SET_HOP_BY_HOP_VALUES = new String[] {
"connection", "keep-alive", "proxy-authenticate", "proxy-authorization",
"te", "trailers", "transfer-encoding", "upgrade", "content-length"}; public
static final Set<String> HOP_BY_HOP_HEADERS_SET = new
HashSet<String>(Arrays.asList(SET_HOP_BY_HOP_VALUES));
....
httppost.setEntity(bufferedHttpEntity);
HttpResponse response =
httpClient.execute(httppost);
HttpEntity entity = response.getEntity();
try{
Header[] headers=response.getAllHeaders();
for(int i=0;i<headers.length;i++){
if(!HOP_BY_HOP_HEADERS_SET.contains(headers[i].getName().toLowerCase()..trim
())){
currentResponse.addHeader(headers[i].getName(), headers[i].getValue());
logger.info("Añadiendo linea
de nombre {} y valor {} para la respuesta a traves de proxy",
headers[i].getName(), headers[i].getValue());
}
}
InputStream is=entity.getContent();
IOUtils.write(IOUtils.toByteArray(is),
currentResponse.getOutputStream());
}catch(Exception ex){
if(response!=null){
try {
EntityUtils.consume(response.getEntity());
} catch (Exception e1) {
e1.printStackTrace();
}
}
currentResponse.setStatus(500);
IOUtils.write("Error formateando el response
en el proxy: "+ ex.getMessage(), currentResponse.getOutputStream());
logger.error("Error formateando el response
en el proxy: {}", ex.getMessage());
}
Hope this help you.
PD: I had to include "content-length" header as a hop-by-hop header for some
problems, but it's not declared as a hop-by-hop header in RFC.
2012/7/10 Joan Balaguero <[email protected]>:
> Hello,
>
>
>
> Is there any way in HC4 to find out if a header is a hop by hop
> header (and , therefore, it should not be transmitted), or must the
> Connection header be parsed manually?
>
>
>
> Thanks,
>
> Joan.
>
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