com.redhat.rcm.version.testutil.HttpTestService.java Source code

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Here is the source code for com.redhat.rcm.version.testutil.HttpTestService.java

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/*
 *  Copyright (C) 2012 John Casey.
 *  
 *  This program is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU Affero General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *  
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU Affero General Public License for more details.
 *  
 *  You should have received a copy of the GNU Affero General Public License
 *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

package com.redhat.rcm.version.testutil;

import static org.apache.commons.io.IOUtils.closeQuietly;
import static org.apache.commons.io.IOUtils.copy;

import org.eclipse.jetty.server.Request;
import org.eclipse.jetty.server.Server;
import org.eclipse.jetty.server.handler.AbstractHandler;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import java.util.Map;
import java.util.Random;

public final class HttpTestService {

    private static final int MAX_TRIES = 3;

    private final Map<String, URL> paths;

    private Server server;

    public HttpTestService(final Map<String, URL> paths) {
        this.paths = paths;
    }

    public String start() throws Exception {
        final Random rand = new Random();
        int tries = 0;

        String baseUrl = null;
        while (tries < MAX_TRIES) {
            final int port = (Math.abs(rand.nextInt()) % 63000) + 1024;
            server = new Server(port);
            server.setHandler(new AbstractHandler() {
                @Override
                public void handle(final String target, final Request baseRequest, final HttpServletRequest request,
                        final HttpServletResponse response) throws IOException, ServletException {
                    System.out.println("GET: " + target);
                    final URL res = paths.get(target);
                    if (res != null) {
                        System.out.println(" --> " + res.toExternalForm());
                        InputStream stream = null;
                        try {
                            stream = res.openStream();
                            copy(stream, response.getOutputStream());
                        } finally {
                            closeQuietly(stream);
                        }

                        baseRequest.setHandled(true);
                    } else {
                        response.sendError(404);
                    }
                }
            });

            try {
                server.start();

                baseUrl = "http://localhost:" + server.getConnectors()[0].getPort();
                System.out.println("HTTP server started on port: " + port);
                break;
            } catch (final Exception e) {
                e.printStackTrace();
            }

            tries++;
        }

        if (tries > MAX_TRIES) {
            throw new IllegalStateException("Cannot start HTTP server.");
        }

        return baseUrl;
    }

    public void stop() {
        try {
            if (server != null) {
                server.stop();
            }
        } catch (final Exception e) {
            e.printStackTrace();
            System.err.println("\n\n\nERROR: Failed to shutdown HTTP service.\n\n\n");
        }
    }

}