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* to you under the Apache License, Version 2.0 (the
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package org.apache.ogt.http.examples.conn;
import org.apache.ogt.http.Header;
import org.apache.ogt.http.HttpHost;
import org.apache.ogt.http.HttpRequest;
import org.apache.ogt.http.HttpResponse;
import org.apache.ogt.http.HttpVersion;
import org.apache.ogt.http.conn.ClientConnectionOperator;
import org.apache.ogt.http.conn.OperatedClientConnection;
import org.apache.ogt.http.conn.scheme.PlainSocketFactory;
import org.apache.ogt.http.conn.scheme.Scheme;
import org.apache.ogt.http.conn.scheme.SchemeRegistry;
import org.apache.ogt.http.conn.ssl.SSLSocketFactory;
import org.apache.ogt.http.impl.conn.DefaultClientConnectionOperator;
import org.apache.ogt.http.message.BasicHttpRequest;
import org.apache.ogt.http.params.HttpParams;
import org.apache.ogt.http.params.HttpProtocolParams;
import org.apache.ogt.http.params.SyncBasicHttpParams;
import org.apache.ogt.http.protocol.HttpContext;
import org.apache.ogt.http.protocol.BasicHttpContext;
/**
* How to open a secure connection through a proxy using
* {@link ClientConnectionOperator ClientConnectionOperator}.
* This exemplifies the <i>opening</i> of the connection only.
* The message exchange, both subsequently and for tunnelling,
* should not be used as a template.
*
* @since 4.0
*/
public class OperatorConnectProxy {
public static void main(String[] args) throws Exception {
// make sure to use a proxy that supports CONNECT
HttpHost target = new HttpHost("issues.apache.org", 443, "https");
HttpHost proxy = new HttpHost("127.0.0.1", 8666, "http");
// some general setup
// Register the "http" and "https" protocol schemes, they are
// required by the default operator to look up socket factories.
SchemeRegistry supportedSchemes = new SchemeRegistry();
supportedSchemes.register(new Scheme("http",
80, PlainSocketFactory.getSocketFactory()));
supportedSchemes.register(new Scheme("https",
443, SSLSocketFactory.getSocketFactory()));
// Prepare parameters.
// Since this example doesn't use the full core framework,
// only few parameters are actually required.
HttpParams params = new SyncBasicHttpParams();
HttpProtocolParams.setVersion(params, HttpVersion.HTTP_1_1);
HttpProtocolParams.setUseExpectContinue(params, false);
// one operator can be used for many connections
ClientConnectionOperator scop = new DefaultClientConnectionOperator(supportedSchemes);
HttpRequest req = new BasicHttpRequest("OPTIONS", "*", HttpVersion.HTTP_1_1);
// In a real application, request interceptors should be used
// to add the required headers.
req.addHeader("Host", target.getHostName());
HttpContext ctx = new BasicHttpContext();
OperatedClientConnection conn = scop.createConnection();
try {
System.out.println("opening connection to " + proxy);
scop.openConnection(conn, proxy, null, ctx, params);
// Creates a request to tunnel a connection.
// For details see RFC 2817, section 5.2
String authority = target.getHostName() + ":" + target.getPort();
HttpRequest connect = new BasicHttpRequest("CONNECT", authority,
HttpVersion.HTTP_1_1);
// In a real application, request interceptors should be used
// to add the required headers.
connect.addHeader("Host", authority);
System.out.println("opening tunnel to " + target);
conn.sendRequestHeader(connect);
// there is no request entity
conn.flush();
System.out.println("receiving confirmation for tunnel");
HttpResponse connected = conn.receiveResponseHeader();
System.out.println("----------------------------------------");
printResponseHeader(connected);
System.out.println("----------------------------------------");
int status = connected.getStatusLine().getStatusCode();
if ((status < 200) || (status > 299)) {
System.out.println("unexpected status code " + status);
System.exit(1);
}
System.out.println("receiving response body (ignored)");
conn.receiveResponseEntity(connected);
// Now we have a tunnel to the target. As we will be creating a
// layered TLS/SSL socket immediately afterwards, updating the
// connection with the new target is optional - but good style.
// The scheme part of the target is already "https", though the
// connection is not yet switched to the TLS/SSL protocol.
conn.update(null, target, false, params);
System.out.println("layering secure connection");
scop.updateSecureConnection(conn, target, ctx, params);
// finally we have the secure connection and can send the request
System.out.println("sending request");
conn.sendRequestHeader(req);
// there is no request entity
conn.flush();
System.out.println("receiving response header");
HttpResponse rsp = conn.receiveResponseHeader();
System.out.println("----------------------------------------");
printResponseHeader(rsp);
System.out.println("----------------------------------------");
} finally {
System.out.println("closing connection");
conn.close();
}
}
private final static void printResponseHeader(HttpResponse rsp) {
System.out.println(rsp.getStatusLine());
Header[] headers = rsp.getAllHeaders();
for (int i=0; i<headers.length; i++) {
System.out.println(headers[i]);
}
}
}