deletehandler.java

来自「JAVA Servlet2.3外文书籍源码」· Java 代码 · 共 48 行

package firewall.server;

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

import firewall.common.*;

import java.io.*;

/**
 * Title:        DeleteHandler
 * Description:  Subclass of RequestHandler to process Delete requests
 * Copyright:    Copyright (c) 2001
 * Company:
 * @author Andrew Harbourne-Thomas
 * @version 1.0
 */
public class DeleteHandler extends RequestHandler {

  /**
   * Perform the processing and response to the client request
   *
   * @param baseRequest BaseRequest or subclass containing
   *        information relevent to the request
   */
  public void respond(BaseRequest baseRequest) {
    String fileName = ((FileName) baseRequest).getFileName();
    try {
      if (!FileValidator.isFileNameValid(fileName)) {
        sendError(HttpServletResponse.SC_PRECONDITION_FAILED, "Filename is invalid");
        return;
      }

      File fileToDelete = new File(fileBase, fileName);
      boolean result = fileToDelete.delete();
      //send response
      if (result) {
        setStatusCode(HttpServletResponse.SC_NO_CONTENT);
      }
      else {
        sendError(HttpServletResponse.SC_NOT_FOUND, "File not deleted");
      }
    }
    catch (IOException e) {
      e.printStackTrace();
    }
  }
}