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* to you under the Apache License, Version 2.0 (the
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*
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package org.apache.http.examples.conn;
import org.apache.http.Header;
import org.apache.http.HttpHost;
import org.apache.http.HttpRequest;
import org.apache.http.HttpResponse;
import org.apache.http.HttpVersion;
import org.apache.http.conn.ClientConnectionOperator;
import org.apache.http.conn.OperatedClientConnection;
import org.apache.http.conn.scheme.PlainSocketFactory;
import org.apache.http.conn.scheme.Scheme;
import org.apache.http.conn.scheme.SchemeRegistry;
import org.apache.http.conn.scheme.SocketFactory;
import org.apache.http.impl.conn.DefaultClientConnectionOperator;
import org.apache.http.message.BasicHttpRequest;
import org.apache.http.params.HttpParams;
import org.apache.http.params.HttpProtocolParams;
import org.apache.http.params.SyncBasicHttpParams;
import org.apache.http.protocol.HttpContext;
import org.apache.http.protocol.BasicHttpContext;
/**
* How to open a direct connection using
* {@link ClientConnectionOperator ClientConnectionOperator}.
* This exemplifies the <i>opening</i> of the connection only.
* The subsequent message exchange in this example should not
* be used as a template.
*
* @since 4.0
*/
public class OperatorConnectDirect {
public static void main(String[] args) throws Exception {
HttpHost target = new HttpHost("jakarta.apache.org", 80, "http");
// some general setup
// Register the "http" protocol scheme, it is required
// by the default operator to look up socket factories.
SchemeRegistry supportedSchemes = new SchemeRegistry();
SocketFactory sf = PlainSocketFactory.getSocketFactory();
supportedSchemes.register(new Scheme("http", sf, 80));
// 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);
req.addHeader("Host", target.getHostName());
HttpContext ctx = new BasicHttpContext();
OperatedClientConnection conn = scop.createConnection();
try {
System.out.println("opening connection to " + target);
scop.openConnection(conn, target, null, ctx, params);
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("----------------------------------------");
System.out.println(rsp.getStatusLine());
Header[] headers = rsp.getAllHeaders();
for (int i = 0; i < headers.length; i++) {
System.out.println(headers[i]);
}
System.out.println("----------------------------------------");
} finally {
System.out.println("closing connection");
conn.close();
}
}
}