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package org.jvnet.glassfish.comms.clb.core;
import org.jvnet.glassfish.comms.clb.proxy.http.util.HttpRequest;
import com.ericsson.ssa.sip.Header;
import com.ericsson.ssa.sip.SipServletRequestImpl;
import com.ericsson.ssa.sip.ViaImpl;
import java.util.ListIterator;
import javax.servlet.sip.SipServletRequest;
import org.jvnet.glassfish.comms.clb.core.sip.SipRoutingException;
/**
*
* @author kshitiz
*/
public class ProxyKeyExtractor {
/** Creates a new instance of ProxyKeyExtractor */
public ProxyKeyExtractor() {
}
/**
* This method checks if request is already proxied. It checks for proxy header corresponding to
* BERoute key and BEKey. If present, the request is already proxied, otherwise not.
*
* @param request the request object
*
* @return true if request is already proxied
*/
public static boolean isHttpRequestProxied(HttpRequest request) {
String value;
// check for proxy header corresponding to BEROUTE key
value = request.getHeader(CLBConstants.PROXY_HEADER_BEROUTE_KEY);
if (value != null) {
return true;
}
// check for proxy header corresponding to BEKEY key
value = request.getHeader(CLBConstants.PROXY_HEADER_BEKEY_KEY);
if (value != null) {
return true;
}
return false;
}
/**
* This method checks if sip request is already proxied. It checks for
* felb parameter in top VIA of the request
*
* @param request the request object
*
* @return true if request is already proxied
*/
public static boolean isSipRequestProxied(SipServletRequestImpl request) throws SipRoutingException {
// Get topmost Via header
Header viaHeader = request.getRawHeader(Header.VIA);
if (viaHeader != null) {
ListIterator<String> viaIterator;
viaIterator = viaHeader.getValues();
if (viaIterator.hasNext()) {
ViaImpl via = new ViaImpl(viaIterator.next());
// Extract 'felb' flag
String frontEndLb = via.getParameter(
CLBConstants.FE_LB_PARAM);
if (frontEndLb != null) {
return true;
}
}
}
return false;
}
/**
* This extracts hash key stored as proxy bekey header from
* sip request
*
* @param request the request object
*
* @return value of proxy bekey header
*/
public static String extractHashKey(SipServletRequest request) {
// First check if it is in proxy-bekey (header used for bekey transfer between F-E and B-E)
String bekey = request.getHeader(Header.PROXY_BEKEY_HEADER);
if (bekey != null) {
request.removeHeader(Header.PROXY_BEKEY_HEADER);
}
return bekey;
}
}