Are you sure that value of the X-CREDENTIALS header doesn't end with \r\n ?
On Thu, Mar 17, 2016 at 11:16 PM, Gordon Ross <gr...@uis.cam.ac.uk> wrote: > I’m using HttpClient 4.3.6 on Java 1.7.0_95. I’m finding that in certain > circumstances, HttpClient is adding a spurious blank line to the headers. > This is then causing the far end server to treat the remaining headers as > the body - not what is desired! > > If I run the code as a stand alone Java app, it works a treat. But > sometimes, when run under Tomcat, I get this spurious blank line. > > I’ve switched on full wire tracing and I’m seeing: > > 2016-03-17 16:59:39,991 [TP-Processor3] DEBUG http.wire gr306 - > http-outgoing-1 >> "POST /signin HTTP/1.1[\r][\n]" > 2016-03-17 16:59:39,991 [TP-Processor3] DEBUG http.wire gr306 - > http-outgoing-1 >> "X-CREDENTIALS: *SNIP*[\r][\n]" > 2016-03-17 16:59:39,991 [TP-Processor3] DEBUG http.wire gr306 - > http-outgoing-1 >> "[\r][\n]" > 2016-03-17 16:59:39,991 [TP-Processor3] DEBUG http.wire gr306 - > http-outgoing-1 >> "Accept: application/xml[\r][\n]" > 2016-03-17 16:59:39,991 [TP-Processor3] DEBUG http.wire gr306 - > http-outgoing-1 >> "Content-Type: application/xml[\r][\n]" > 2016-03-17 16:59:39,991 [TP-Processor3] DEBUG http.wire gr306 - > http-outgoing-1 >> "Content-Length: 0[\r][\n]" > 2016-03-17 16:59:39,991 [TP-Processor3] DEBUG http.wire gr306 - > http-outgoing-1 >> "Host: www.example.com:443[\r][\n]" > 2016-03-17 16:59:39,991 [TP-Processor3] DEBUG http.wire gr306 - > http-outgoing-1 >> "Connection: Keep-Alive[\r][\n]" > 2016-03-17 16:59:39,991 [TP-Processor3] DEBUG http.wire gr306 - > http-outgoing-1 >> "User-Agent: Apache-HttpClient/4.3.6 (java 1.5)[\r][\n]" > 2016-03-17 16:59:39,991 [TP-Processor3] DEBUG http.wire gr306 - > http-outgoing-1 >> "Accept-Encoding: gzip,deflate[\r][\n]" > 2016-03-17 16:59:39,991 [TP-Processor3] DEBUG http.wire gr306 - > http-outgoing-1 >> "[\r][\n]" > > > > I’ve added code to check the headers that I’m adding to the HTTPPost > instance, and I’m not adding any blank or spurious headers. > > httpPost = new HttpPost(path); > > for(String header: headers.keySet()) > { > logger.trace("Adding Header to Request: " + header); > httpPost.addHeader(header, headers.get(header)); > } > > Shows: > > 2016-03-17 16:59:39,986 [TP-Processor3] TRACE util.BasicHttpClient gr306 - > Adding Header to Request: X-CREDENTIALS > 2016-03-17 16:59:39,986 [TP-Processor3] TRACE util.BasicHttpClient gr306 - > Adding Header to Request: Accept > 2016-03-17 16:59:39,986 [TP-Processor3] TRACE util.BasicHttpClient gr306 - > Adding Header to Request: Content-Type > > As I said, when this same library code is run as a standalone Java app, > the blank header line disappears. > > Any suggestions as to how I can track this down? > > Thank you. > > GTG > -- > Gordon Ross, > UIS Telecoms Office, > University of Cambridge > >