web services - How to add user HTTP Headers in CXF response? -

for reason there no 'content-length' http headers in cxf response. i've decided implement interceptor it, unfortunately there no added header in sent data (intercepted using wireshark). can set breakpoint , can see interceptor invoked. what's wrong?

/**  * adds content-length header outcoming messages  */ public class addcontentlengthinterceptor extends abstractlogginginterceptor {      private static final string content_length_added = addcontentlengthinterceptor.class.getname() + ".log-setup";      public addcontentlengthinterceptor(string phase) {         super(phase);         addbefore(staxoutinterceptor.class.getname());     }     public addcontentlengthinterceptor() {         this(phase.pre_protocol); // before streaming     }      @override     protected logger getlogger() {         return null;     }      @override     public void handlemessage(message message) throws fault {         final outputstream os = message.getcontent(outputstream.class);         final writer iowriter = message.getcontent(writer.class);         if (os == null && iowriter == null) {             return;         }          // ignore double processing of message         boolean hasaddedheader = message.containskey(content_length_added);         if (!hasaddedheader) {             message.put(content_length_added, boolean.true);             if (os != null) {                 // write output while caching adding header later                 final cacheandwriteoutputstream newout = new cacheandwriteoutputstream(os);                 message.setcontent(outputstream.class, newout);                 newout.registercallback(new loggingcallback(message, os));             }         }     }      class loggingcallback implements cachedoutputstreamcallback {          private final message message;         private final outputstream origstream;          public loggingcallback(final message msg, final outputstream os) {             this.message = msg;             this.origstream = os;         }          public void onflush(cachedoutputstream cos) {          }          public void onclose(cachedoutputstream cos) {             long contentlength = cos.size();              map<string, list<string>> headers = (map<string, list<string>>) message.get(message.protocol_headers);             if (headers == null)                 headers = new hashmap<string, list<string>>();             headers.put("content-length", arrays.aslist(string.valueof(contentlength)));             message.put(message.protocol_headers, headers);              try {                 // empty out cache                 cos.lockoutputstream();                 cos.resetout(null, false);             } catch (exception ex) {                 //ignore             }             message.setcontent(outputstream.class, origstream);         }     } } 

this server-side endpoints created:

    mediaservice = new mediaservice(ip, rtspport, streamuri);     providerimpl provider = new providerimpl();     mediaendpoint = (endpointimpl) provider.createendpoint(null, mediaservice);     string mediaserviceurl = messageformat.format("http://{0}:{1}/onvif/media_service", ip, string.valueof(port));     mediaendpoint.publish(mediaserviceurl);      // add "content-length" header     mediaendpoint.getserver().getendpoint().getoutinterceptors().add(contentlengthinterceptor); 

i think using transfer-encoding chunked. results in no content-length header since defined way in rfc.

messages must not include both content-length header field , non-identity transfer-coding. if message include non-identity transfer-coding, content-length must ignored.

i not sure but, either cxf removes header since not allowed or sets sub layers remove it. far know cxf uses httpurlconnection transport message. , layer sets content-length header on normal cases. since using chunked transfer, layer may override it.

in order fix must change transfer-encoding. , since cxf's sets content-length header no longer need write interceptor.

by way, if use custom header, realise interceptor works charm.