ftpreply.java

来自「apache推出的net包」· Java 代码 · 共 199 行

/*
 * Copyright 2001-2005 The Apache Software Foundation
 *
 * 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 org.apache.commons.net.ftp;

/***
 * FTPReply stores a set of constants for FTP reply codes.  To interpret
 * the meaning of the codes, familiarity with RFC 959 is assumed.
 * The mnemonic constant names are transcriptions from the code descriptions
 * of RFC 959.  For those who think in terms of the actual reply code values,
 * a set of CODE_NUM constants are provided where NUM is the numerical value
 * of the code.
 * <p>
 * <p>
 * @author Daniel F. Savarese
 ***/

public final class FTPReply
{

    public static final int CODE_110 = 110;
    public static final int CODE_120 = 120;
    public static final int CODE_125 = 125;
    public static final int CODE_150 = 150;
    public static final int CODE_200 = 200;
    public static final int CODE_202 = 202;
    public static final int CODE_211 = 211;
    public static final int CODE_212 = 212;
    public static final int CODE_213 = 213;
    public static final int CODE_214 = 214;
    public static final int CODE_215 = 215;
    public static final int CODE_220 = 220;
    public static final int CODE_221 = 221;
    public static final int CODE_225 = 225;
    public static final int CODE_226 = 226;
    public static final int CODE_227 = 227;
    public static final int CODE_230 = 230;
    public static final int CODE_250 = 250;
    public static final int CODE_257 = 257;
    public static final int CODE_331 = 331;
    public static final int CODE_332 = 332;
    public static final int CODE_350 = 350;
    public static final int CODE_421 = 421;
    public static final int CODE_425 = 425;
    public static final int CODE_426 = 426;
    public static final int CODE_450 = 450;
    public static final int CODE_451 = 451;
    public static final int CODE_452 = 452;
    public static final int CODE_500 = 500;
    public static final int CODE_501 = 501;
    public static final int CODE_502 = 502;
    public static final int CODE_503 = 503;
    public static final int CODE_504 = 504;
    public static final int CODE_521 = 521;
    public static final int CODE_530 = 530;
    public static final int CODE_532 = 532;
    public static final int CODE_550 = 550;
    public static final int CODE_551 = 551;
    public static final int CODE_552 = 552;
    public static final int CODE_553 = 553;

    public static final int RESTART_MARKER = CODE_110;
    public static final int SERVICE_NOT_READY = CODE_120;
    public static final int DATA_CONNECTION_ALREADY_OPEN = CODE_125;
    public static final int FILE_STATUS_OK = CODE_150;
    public static final int COMMAND_OK = CODE_200;
    public static final int COMMAND_IS_SUPERFLUOUS = CODE_202;
    public static final int SYSTEM_STATUS = CODE_211;
    public static final int DIRECTORY_STATUS = CODE_212;
    public static final int FILE_STATUS = CODE_213;
    public static final int HELP_MESSAGE = CODE_214;
    public static final int NAME_SYSTEM_TYPE = CODE_215;
    public static final int SERVICE_READY = CODE_220;
    public static final int SERVICE_CLOSING_CONTROL_CONNECTION = CODE_221;
    public static final int DATA_CONNECTION_OPEN = CODE_225;
    public static final int CLOSING_DATA_CONNECTION = CODE_226;
    public static final int ENTERING_PASSIVE_MODE = CODE_227;
    public static final int USER_LOGGED_IN = CODE_230;
    public static final int FILE_ACTION_OK = CODE_250;
    public static final int PATHNAME_CREATED = CODE_257;
    public static final int NEED_PASSWORD = CODE_331;
    public static final int NEED_ACCOUNT = CODE_332;
    public static final int FILE_ACTION_PENDING = CODE_350;
    public static final int SERVICE_NOT_AVAILABLE = CODE_421;
    public static final int CANNOT_OPEN_DATA_CONNECTION = CODE_425;
    public static final int TRANSFER_ABORTED = CODE_426;
    public static final int FILE_ACTION_NOT_TAKEN = CODE_450;
    public static final int ACTION_ABORTED = CODE_451;
    public static final int INSUFFICIENT_STORAGE = CODE_452;
    public static final int UNRECOGNIZED_COMMAND = CODE_500;
    public static final int SYNTAX_ERROR_IN_ARGUMENTS = CODE_501;
    public static final int COMMAND_NOT_IMPLEMENTED = CODE_502;
    public static final int BAD_COMMAND_SEQUENCE = CODE_503;
    public static final int COMMAND_NOT_IMPLEMENTED_FOR_PARAMETER = CODE_504;
    public static final int NOT_LOGGED_IN = CODE_530;
    public static final int NEED_ACCOUNT_FOR_STORING_FILES = CODE_532;
    public static final int FILE_UNAVAILABLE = CODE_550;
    public static final int PAGE_TYPE_UNKNOWN = CODE_551;
    public static final int STORAGE_ALLOCATION_EXCEEDED = CODE_552;
    public static final int FILE_NAME_NOT_ALLOWED = CODE_553;

    // Cannot be instantiated
    private FTPReply()
    {}

    /***
     * Determine if a reply code is a positive preliminary response.  All
     * codes beginning with a 1 are positive preliminary responses.
     * Postitive preliminary responses are used to indicate tentative success.
     * No further commands can be issued to the FTP server after a positive
     * preliminary response until a follow up response is received from the
     * server.
     * <p>
     * @param reply  The reply code to test.
     * @return True if a reply code is a postive preliminary response, false
     *         if not.
     ***/
    public static boolean isPositivePreliminary(int reply)
    {
        return (reply >= 100 && reply < 200);
    }

    /***
     * Determine if a reply code is a positive completion response.  All
     * codes beginning with a 2 are positive completion responses.
     * The FTP server will send a positive completion response on the final
     * successful completion of a command.
     * <p>
     * @param reply  The reply code to test.
     * @return True if a reply code is a postive completion response, false
     *         if not.
     ***/
    public static boolean isPositiveCompletion(int reply)
    {
        return (reply >= 200 && reply < 300);
    }

    /***
     * Determine if a reply code is a positive intermediate response.  All
     * codes beginning with a 3 are positive intermediate responses.
     * The FTP server will send a positive intermediate response on the
     * successful completion of one part of a multi-part sequence of
     * commands.  For example, after a successful USER command, a positive
     * intermediate response will be sent to indicate that the server is
     * ready for the PASS command.
     * <p>
     * @param reply  The reply code to test.
     * @return True if a reply code is a postive intermediate response, false
     *         if not.
     ***/
    public static boolean isPositiveIntermediate(int reply)
    {
        return (reply >= 300 && reply < 400);
    }

    /***
     * Determine if a reply code is a negative transient response.  All
     * codes beginning with a 4 are negative transient responses.
     * The FTP server will send a negative transient response on the
     * failure of a command that can be reattempted with success.
     * <p>
     * @param reply  The reply code to test.
     * @return True if a reply code is a negative transient response, false
     *         if not.
     ***/
    public static boolean isNegativeTransient(int reply)
    {
        return (reply >= 400 && reply < 500);
    }

    /***
     * Determine if a reply code is a negative permanent response.  All
     * codes beginning with a 5 are negative permanent responses.
     * The FTP server will send a negative permanent response on the
     * failure of a command that cannot be reattempted with success.
     * <p>
     * @param reply  The reply code to test.
     * @return True if a reply code is a negative permanent response, false
     *         if not.
     ***/
    public static boolean isNegativePermanent(int reply)
    {
        return (reply >= 500 && reply < 600);
    }

}