📄 get.java

📁 这是linux下ssl vpn的实现程序
💻 JAVA
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/* ========================================================================== *
 * Copyright (C) 2004-2005 Pier Fumagalli <http://www.betaversion.org/~pier/> *
 *                            All rights reserved.                            *
 * ========================================================================== *
 *                                                                            *
 * Licensed under the  Apache License, Version 2.0  (the "License").  You may *
 * not use this file except in compliance with the License.  You may obtain a *
 * copy of the License at <http://www.apache.org/licenses/LICENSE-2.0>.       *
 *                                                                            *
 * Unless  required  by applicable  law or  agreed  to  in writing,  software *
 * distributed under the License is distributed on an  "AS IS" BASIS, WITHOUT *
 * WARRANTIES OR  CONDITIONS OF ANY KIND, either express or implied.  See the *
 * License for the  specific language  governing permissions  and limitations *
 * under the License.                                                         *
 *                                                                            *
 * ========================================================================== */
package com.sslexplorer.vfs.webdav.methods;

import java.io.IOException;
import java.io.OutputStream;
import java.io.PrintWriter;
import java.util.Iterator;

import com.sslexplorer.core.CoreServlet;
import com.sslexplorer.vfs.NetworkPlaceResourceType;
import com.sslexplorer.vfs.webdav.AbstractNetworkPlaceMount;
import com.sslexplorer.vfs.webdav.DAVInputStream;
import com.sslexplorer.vfs.webdav.DAVResource;
import com.sslexplorer.vfs.webdav.DAVTransaction;

/**
 * <p>
 * <a href="http://www.rfc-editor.org/rfc/rfc2616.txt">HTTP</a>
 * <code>GET</code> metohd implementation.
 * </p>
 * 
 * @author <a href="/">Pier Fumagalli</a>
 */
public class GET extends HEAD {

    /**
     * <p>
     * The mime type this method will return for collections.
     * </p>
     */
    public static final String COLLECTION_MIME_TYPE = "text/html";

    /**
     * <p>
     * Create a new {@link GET} instance.
     * </p>
     */
    public GET() {
        super();
    }

    /**
     * <p>
     * Process the <code>GET</code> method.
     * </p>
     */
    public void process(DAVTransaction transaction, DAVResource resource) throws IOException {
        super.process(transaction, resource);

        try {
            if (resource.isCollection() || resource.isMount()) {
                String mime = COLLECTION_MIME_TYPE + "; charset=\"utf-8\"";
                transaction.setContentType(mime);

                transaction.setHeader("Cache-Control", "no-cache"); // HTTP 1.1
                transaction.setHeader("Pragma", "no-cache"); // HTTP 1.0
                transaction.setHeader("Expires", "-1");

                PrintWriter out = transaction.write("utf-8");
                String path = resource.getFullPath();
                out.println("<html>");
                out.println("<head>");
                out.println("<title>Collection: " + path + "</title>");
                out.println("</head>");
                out.println("<body>");
                out.println("<h2>Collection: " + path + "</h2>");
                out.println("<ul>");

                /* Process the parent */
                DAVResource parent = resource.getParent();
                if (parent != null)
                    out.print("<li><a href=\"..\">../</a>");

                /* Process the children */
                Iterator iterator = resource.getChildren();
                if (iterator != null) {
                    while (iterator.hasNext()) {
                        DAVResource child = (DAVResource) iterator.next();
                        String childPath = child.getDisplayName();
                        out.print("<li><a href=\"");
                        out.print(childPath);
                        out.print("\">" + childPath + "</a> (" + child.getBasename() + ") - " + child.getClass().getName());
                    }
                }

                out.println("</ul>");
                out.println("</body>");
                out.println("</html>");
                out.flush();
                return;
            }
        } catch (Exception e) {
            IOException ioe = new IOException(e.getMessage());
            ioe.initCause(e);
            throw ioe;
        }

        // BPS to JB and or Lee - We need to speak about this
        //
        // This completely breaks HTML application launching (e.g. RMAS),
        // the content type must be correct.
        //
        // If this was done to prevent content being opened in the same
        // browser window then this is not really the place to do it and
        // another solution needs to found. Perhaps we need to use the file
        // download interceptors.
        //
        // Another possibility would be to have the store return the mime
        // type given a path
        //
        // Im going to leave this as returning the correct MIME type as i
        // need it for working on Xtra / RMAS

        int total = 0;
        try {

            transaction.setHeader("Content-Type", resource.getContentType());
            

            /* Processing a normal resource request */
            OutputStream out = transaction.write();
            DAVInputStream in = resource.read();
            byte buffer[] = new byte[4096];
            int k = -1;
            while ((k = in.read(buffer)) != -1) {
                out.write(buffer, 0, k);
                total += k;
            }
            //out.flush();
        } catch (IOException ioe) {
            throw ioe;
        }
    }
}
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