Example usage for org.apache.http.conn.routing RouteTracker tunnelProxy

Introduction

In this page you can find the example usage for org.apache.http.conn.routing RouteTracker tunnelProxy.

Prototype

public final void tunnelProxy(final HttpHost proxy, final boolean secure) 

Source Link

Document

Tracks tunnelling to a proxy in a proxy chain.

Usage

From source file:org.apache.http.impl.execchain.MainClientExec.java

/**
 * Establishes the target route./*www.j a v  a 2 s.  co  m*/
 */
void establishRoute(final AuthState proxyAuthState, final HttpClientConnection managedConn,
        final HttpRoute route, final HttpRequest request, final HttpClientContext context)
        throws HttpException, IOException {
    final RequestConfig config = context.getRequestConfig();
    final int timeout = config.getConnectTimeout();
    final RouteTracker tracker = new RouteTracker(route);
    int step;
    do {
        final HttpRoute fact = tracker.toRoute();
        step = this.routeDirector.nextStep(route, fact);

        switch (step) {

        case HttpRouteDirector.CONNECT_TARGET:
            this.connManager.connect(managedConn, route, timeout > 0 ? timeout : 0, context);
            tracker.connectTarget(route.isSecure());
            break;
        case HttpRouteDirector.CONNECT_PROXY:
            this.connManager.connect(managedConn, route, timeout > 0 ? timeout : 0, context);
            final HttpHost proxy = route.getProxyHost();
            tracker.connectProxy(proxy, false);
            break;
        case HttpRouteDirector.TUNNEL_TARGET: {
            final boolean secure = createTunnelToTarget(proxyAuthState, managedConn, route, request, context);
            this.log.debug("Tunnel to target created.");
            tracker.tunnelTarget(secure);
        }
            break;

        case HttpRouteDirector.TUNNEL_PROXY: {
            // The most simple example for this case is a proxy chain
            // of two proxies, where P1 must be tunnelled to P2.
            // route: Source -> P1 -> P2 -> Target (3 hops)
            // fact:  Source -> P1 -> Target       (2 hops)
            final int hop = fact.getHopCount() - 1; // the hop to establish
            final boolean secure = createTunnelToProxy(route, hop, context);
            this.log.debug("Tunnel to proxy created.");
            tracker.tunnelProxy(route.getHopTarget(hop), secure);
        }
            break;

        case HttpRouteDirector.LAYER_PROTOCOL:
            this.connManager.upgrade(managedConn, route, context);
            tracker.layerProtocol(route.isSecure());
            break;

        case HttpRouteDirector.UNREACHABLE:
            throw new HttpException(
                    "Unable to establish route: " + "planned = " + route + "; current = " + fact);
        case HttpRouteDirector.COMPLETE:
            this.connManager.routeComplete(managedConn, route, context);
            break;
        default:
            throw new IllegalStateException("Unknown step indicator " + step + " from RouteDirector.");
        }

    } while (step > HttpRouteDirector.COMPLETE);
}

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