Fix for feature request olap4j#23. Adds support for GZIP compression …

…in the HTTP proxy.

src/org/olap4j/driver/xmla/proxy/XmlaOlap4jHttpProxy.java

@@ -24,6 +24,7 @@
 import java.io.*;
 import java.net.*;
 import java.util.concurrent.Future;
+import java.util.zip.GZIPInputStream;
 
 /**
  * Extends the AbstractCachedProxy and serves as
@@ -87,6 +88,11 @@ public byte[] getResponse(XmlaOlap4jServerInfos serverInfos, String request)
  getEncodingCharsetName()
  .concat(";q=1"));
 
+ // Tell the server that we support gzip encoding
+ urlConnection.setRequestProperty(
+ "Accept-Encoding",
+ "gzip");
+
  // Some servers expect a SOAPAction header.
  // TODO There is bound to be a better way to do this.
  if (request.contains(DISCOVER)) {
@@ -128,6 +134,14 @@ public byte[] getResponse(XmlaOlap4jServerInfos serverInfos, String request)
 
  // Get the response, again assuming default encoding.
  InputStream is = urlConnection.getInputStream();
+
+ // Detect that the server used gzip encoding
+ String contentEncoding =
+ urlConnection.getHeaderField("Content-Encoding");
+ if("gzip".equals(contentEncoding)) {
+ is = new GZIPInputStream(is);
+ }
+
  final ByteArrayOutputStream baos = new ByteArrayOutputStream();
  byte[] buf = new byte[1024];
  int count;