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From Aniceto Pérez y Madrid (Reopened) (JIRA) <j...@apache.org>
Subject [jira] [Reopened] (HTTPCLIENT-1170) Incomplete data received from servlet
Date Wed, 29 Feb 2012 11:23:58 GMT

     [ https://issues.apache.org/jira/browse/HTTPCLIENT-1170?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Aniceto Pérez y Madrid reopened HTTPCLIENT-1170:
------------------------------------------------


The problem is not the serializing or deserializing an object. The problem is servlet is sending
30KB of binary data and httpclient only receives 17KB. With less than 14KB it works fine.
But a browser receives the full content. So I say there is a bug.
When the servlet says  length 30830, I get this from the client log
readline4096  van 4096
sz 30830
readline4096  van 8192
sz 30830
readline653  van 8845
sz 30830
readline4096  van 12941
sz 30830
readline4096  van 17037
sz 30830
readline808  van 17845
sz 30830
and here it gets stuck because no more bytes are available from the inputStream.

Thanks

                
> Incomplete data received from servlet
> -------------------------------------
>
>                 Key: HTTPCLIENT-1170
>                 URL: https://issues.apache.org/jira/browse/HTTPCLIENT-1170
>             Project: HttpComponents HttpClient
>          Issue Type: Bug
>          Components: HttpClient
>    Affects Versions: 4.1.3
>         Environment: java 1.7.0_0, Windows 7 x 64, Apache 7.0.22, connections are made
throug http://localhost
>            Reporter: Aniceto Pérez y Madrid
>            Priority: Blocker
>
> Hi
> I have this servlet that generates on the fly a binary response by serializing an object.
buf size is about 30 KB. I've been using this code to serve files for a long time. If I access
that servlet using any web browser, the received file is OK.
> 			byte[] buf = respObject.stringBinSerialize();
> 			response.setContentLength(buf.length);
> 			response.setContentType("binary/octet-stream");
> 			response.setStatus(HttpServletResponse.SC_OK);
> 			OutputStream out = response.getOutputStream();
> 			out.write(buf);
> 			out.flush();
> Now I have this client code and it doesn't receive the full response. 
>                 byte[] completo = new byte[0], temporal;
>                 byte[] cbuf = new byte[4096];
>                 int cuenta = 0, esta = 0;
>                 HttpParams params = new SyncBasicHttpParams();
>                 HttpConnectionParams.setSocketBufferSize(params, 64000);
>                 HttpProtocolParams.setVersion(params, HttpVersion.HTTP_1_1);
>                 HttpClient httpclient = new DefaultHttpClient(params);
>                 try {
>                     HttpPost httpost = new HttpPost(targetURLinclServletName);
>                     HttpGet httpget = new HttpGet("http://localhost:8080/myservlet");
>                     HttpResponse response = httpclient.execute(httpget);
>                     HttpEntity entity = response.getEntity();
>                     if (entity != null) {
>                         System.out.println("ent sz " + entity.getContentLength() + "
chk " + entity.isChunked() + " is rept " + entity.isRepeatable() + "  str " + entity.isStreaming());
> //                        completo = EntityUtils.toByteArray(entity);
>                         System.out.println("bytearrayed " + completo.length);
>                         InputStream instream = entity.getContent();
>                         while (completo.length != entity.getContentLength() &&
(esta = instream.read(cbuf)) != -1) {
>                             if (selector.equals(RPCdefs.SELECTOR_PROYLIST) || true) {
>                                 cuenta += esta;
>                                 System.out.println("readline" + esta + "  van " + cuenta);
>                                 System.out.println("sz " + entity.getContentLength());
>                             }
>                             temporal = new byte[completo.length + esta];
>                             System.arraycopy(completo, 0, temporal, 0, completo.length);
>                             System.arraycopy(cbuf, 0, temporal, completo.length, esta);
>                             completo = temporal;
>                             temporal = null;
>                         }
>                     }
>                     EntityUtils.consume(entity);
>                 } finally {
>                     httpclient.getConnectionManager().shutdown();
>                 }
> The simplest way to receive is  EntityUtils.toByteArray(entity), but it gets hung. The
loop for partial copy is to know how may bytes are received. They are about 17845. The initial
params were added to check if the issue was related to flow control, but with 64 KB buffers
it doesn't changes anything. 

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