After some research, I found solution in olap4j sources. Here one chenged method, member of org.olap4j.driver.xmla.proxy.XmlaOlap4jAbstractHttpProxy class
public byte[] getResponse(String server_url, String request) throws IOException {
URLConnection urlConnection = null;
try {
URL url = new URL(server_url);
urlConnection = url.openConnection();
urlConnection.setDoOutput(true);
// Set headers
urlConnection.setRequestProperty("content-type", "text/xml; charset=".concat("UTF-8"));
urlConnection.setRequestProperty("User-Agent", "Olap4j");
urlConnection.setRequestProperty("Accept", "text/xml;q=1");
urlConnection.setRequestProperty("Accept-Charset", "UTF-8;q=1");
urlConnection.setRequestProperty("Accept-Encoding", "gzip"); // Tell the server that we support gzip encoding
// Some servers expect a SOAPAction header.
if (request.contains("DISCOVER")) {
urlConnection.setRequestProperty("SOAPAction", "\"urn:schemas-microsoft-com:xml-analysis:Discover\"");
} else if (request.contains("EXECUTE")) {
urlConnection.setRequestProperty("SOAPAction", "\"urn:schemas-microsoft-com:xml-analysis:Execute\"");
}
// Send data (i.e. POST). Use same encoding as specified in the
// header.
final String encoding1 = "UTF-8";
urlConnection.getOutputStream().write(request.getBytes(encoding1));
// 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;
while ((count = is.read(buf)) > 0) {
baos.write(buf, 0, count);
}
return baos.toByteArray();
} catch (Exception e) {
// In order to prevent the JDK from keeping this connection
// in WAIT mode, we need to empty the error stream cache.
final int espCode =
((HttpURLConnection) urlConnection).getResponseCode();
InputStream errorStream =
((HttpURLConnection) urlConnection).getErrorStream();
final ByteArrayOutputStream baos =
new ByteArrayOutputStream();
final byte[] buf = new byte[1024];
int count;
if (errorStream != null) {
while ((count = errorStream.read(buf)) > 0) {
baos.write(buf, 0, count);
}
errorStream.close();
}
baos.close();
}
return null;
}
