org.eclipse.orion.server.cf.live.cflauncher.commands.DeleteFileCommand.java Source code

Introduction

Here is the source code for org.eclipse.orion.server.cf.live.cflauncher.commands.DeleteFileCommand.java

Source

/*******************************************************************************
 * Copyright (c) 2014 IBM Corporation and others 
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 * 
 * Contributors:
 * IBM Corporation - initial API and implementation
 *******************************************************************************/

package org.eclipse.orion.server.cf.live.cflauncher.commands;

import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.net.URI;
import javax.servlet.http.HttpServletResponse;
import org.apache.commons.httpclient.*;
import org.apache.commons.httpclient.methods.DeleteMethod;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Status;
import org.eclipse.orion.server.cf.CFActivator;
import org.eclipse.orion.server.cf.commands.ICFCommand;
import org.eclipse.orion.server.cf.utils.HttpUtil;
import org.eclipse.orion.server.core.ServerStatus;
import org.eclipse.orion.server.core.resources.Base64;
import org.eclipse.osgi.util.NLS;
import org.json.JSONException;
import org.json.JSONObject;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class DeleteFileCommand implements ICFCommand {
    private static final String DAV_PATH = "/dav/"; //$NON-NLS-1$

    private final Logger logger = LoggerFactory.getLogger("org.eclipse.orion.server.cf"); //$NON-NLS-1$

    private String commandName;
    private String uri;
    private String path;

    private String cfLauncherAuth;

    /**
     * 
     * @param target
     * @param app
     * @param uri The URI of the app. Hostname only, for example: "myapp.cfapps.io"
     * @param path The path of the file to be deleted, relative to the app store. Should NOT have a leading "/"
     * @param contents File contents.
     */
    public DeleteFileCommand(String uri, String path) {
        this.commandName = "Delete file in app";
        this.uri = uri;
        this.path = path;
        try {
            // ISO-8859-1 see http://stackoverflow.com/a/703341/3394770
            byte[] credentials = (CFLauncherConstants.cfLauncherUsername + ":"
                    + CFLauncherConstants.cfLauncherPassword).getBytes("ISO-8859-1");
            String encoded = new String(Base64.encode(credentials), "ISO-8859-1");
            this.cfLauncherAuth = "Basic " + encoded; //$NON-NLS-1$
        } catch (UnsupportedEncodingException e) {
            // Should never happen
            logger.error(e.getMessage(), e);
        }
    }

    private void configureHttpMethod(HttpMethod method) {
        method.addRequestHeader(new Header("Authorization", cfLauncherAuth));
    }

    @Override
    public IStatus doIt() {
        try {
            /* Construct WebDAV request to update the file. */
            String path = CFLauncherConstants.cfLauncherPrefix + DAV_PATH + this.path; // launcher/dav/whatever.txt
            URI fileUpdateURI = new URI("https", null, this.uri, 443, path, null, null);

            DeleteMethod deleteFileMethod = new DeleteMethod(fileUpdateURI.toString());
            configureHttpMethod(deleteFileMethod);

            ServerStatus status = executeMethod(deleteFileMethod);
            if (!status.isOK())
                return status;

            return status;

        } catch (Exception e) {
            String msg = NLS.bind("An error occured when performing operation {0}", commandName); //$NON-NLS-1$
            logger.error(msg, e);
            return new ServerStatus(IStatus.ERROR, HttpServletResponse.SC_INTERNAL_SERVER_ERROR, msg, e);
        }
    }

    protected ServerStatus executeMethod(HttpMethod method) throws HttpException, IOException, JSONException {
        try {
            int code = CFActivator.getDefault().getHttpClient().executeMethod(method);

            if (code == 204) {
                /* no content response */
                return new ServerStatus(Status.OK_STATUS, HttpServletResponse.SC_OK);
            }

            JSONObject result = new JSONObject();
            result.put("response", method.getResponseBodyAsString());

            if (code != 200 && code != 201) {
                // TODO parse error from XML and put in description
                return HttpUtil.createErrorStatus(Status.ERROR, Integer.toString(code), method.getStatusText());
            }

            return new ServerStatus(Status.OK_STATUS, HttpServletResponse.SC_OK, result);
        } finally {
            /* ensure connections are released back to the connection manager */
            method.releaseConnection();
        }
    }
}