    001/*
    002 * Licensed to the Apache Software Foundation (ASF) under one or more
    003 * contributor license agreements.  See the NOTICE file distributed with
    004 * this work for additional information regarding copyright ownership.
    005 * The ASF licenses this file to You under the Apache License, Version 2.0
    006 * (the "License"); you may not use this file except in compliance with
    007 * the License.  You may obtain a copy of the License at
    008 *
    009 *      http://www.apache.org/licenses/LICENSE-2.0
    010 *
    011 * Unless required by applicable law or agreed to in writing, software
    012 * distributed under the License is distributed on an "AS IS" BASIS,
    013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    014 * See the License for the specific language governing permissions and
    015 * limitations under the License.
    016 */
    017
    018package org.apache.commons.net.nntp;
    019
    020/**
    021 * NNTPReply stores a set of constants for NNTP reply codes. To interpret the meaning of the codes, familiarity with RFC 977 is assumed. The mnemonic constant
    022 * names are transcriptions from the code descriptions of RFC 977.
    023 */
    024public final class NNTPReply {
    025
    026    /** NNTP reply code {@value}. */
    027    public static final int HELP_TEXT_FOLLOWS = 100;
    028
    029    /** NNTP reply code {@value}. */
    030    public static final int DEBUG_OUTPUT = 199;
    031
    032    /** NNTP reply code {@value}. */
    033    public static final int SERVER_READY_POSTING_ALLOWED = 200;
    034
    035    /** NNTP reply code {@value}. */
    036    public static final int SERVER_READY_POSTING_NOT_ALLOWED = 201;
    037
    038    /** NNTP reply code {@value}. */
    039    public static final int SLAVE_STATUS_NOTED = 202;
    040
    041    /** NNTP reply code {@value}. */
    042    public static final int CLOSING_CONNECTION = 205;
    043
    044    /** NNTP reply code {@value}. */
    045    public static final int GROUP_SELECTED = 211;
    046
    047    /** NNTP reply code {@value}. */
    048    public static final int ARTICLE_RETRIEVED_HEAD_AND_BODY_FOLLOW = 220;
    049
    050    /** NNTP reply code {@value}. */
    051    public static final int ARTICLE_RETRIEVED_HEAD_FOLLOWS = 221;
    052
    053    /** NNTP reply code {@value}. */
    054    public static final int ARTICLE_RETRIEVED_BODY_FOLLOWS = 222;
    055
    056    /** NNTP reply code {@value}. */
    057    public static final int ARTICLE_RETRIEVED_REQUEST_TEXT_SEPARATELY = 223;
    058
    059    /** NNTP reply code {@value}. */
    060    public static final int ARTICLE_LIST_BY_MESSAGE_ID_FOLLOWS = 230;
    061
    062    /** NNTP reply code {@value}. */
    063    public static final int NEW_NEWSGROUP_LIST_FOLLOWS = 231;
    064
    065    /** NNTP reply code {@value}. */
    066    public static final int ARTICLE_TRANSFERRED_OK = 235;
    067
    068    /** NNTP reply code {@value}. */
    069    public static final int ARTICLE_POSTED_OK = 240;
    070
    071    /** NNTP reply code {@value}. */
    072    public static final int AUTHENTICATION_ACCEPTED = 281;
    073
    074    /** NNTP reply code {@value}. */
    075    public static final int SEND_ARTICLE_TO_TRANSFER = 335;
    076
    077    /** NNTP reply code {@value}. */
    078    public static final int SEND_ARTICLE_TO_POST = 340;
    079
    080    /** NNTP reply code {@value}. */
    081    public static final int MORE_AUTH_INFO_REQUIRED = 381;
    082
    083    /** NNTP reply code {@value}. */
    084    public static final int SERVICE_DISCONTINUED = 400;
    085
    086    /** NNTP reply code {@value}. */
    087    public static final int NO_SUCH_NEWSGROUP = 411;
    088
    089    /** NNTP reply code {@value}. */
    090    public static final int NO_NEWSGROUP_SELECTED = 412;
    091
    092    /** NNTP reply code {@value}. */
    093    public static final int NO_CURRENT_ARTICLE_SELECTED = 420;
    094
    095    /** NNTP reply code {@value}. */
    096    public static final int NO_NEXT_ARTICLE = 421;
    097
    098    /** NNTP reply code {@value}. */
    099    public static final int NO_PREVIOUS_ARTICLE = 422;
    100
    101    /** NNTP reply code {@value}. */
    102    public static final int NO_SUCH_ARTICLE_NUMBER = 423;
    103
    104    /** NNTP reply code {@value}. */
    105    public static final int NO_SUCH_ARTICLE_FOUND = 430;
    106
    107    /** NNTP reply code {@value}. */
    108    public static final int ARTICLE_NOT_WANTED = 435;
    109
    110    /** NNTP reply code {@value}. */
    111    public static final int TRANSFER_FAILED = 436;
    112
    113    /** NNTP reply code {@value}. */
    114    public static final int ARTICLE_REJECTED = 437;
    115
    116    /** NNTP reply code {@value}. */
    117    public static final int POSTING_NOT_ALLOWED = 440;
    118
    119    /** NNTP reply code {@value}. */
    120    public static final int POSTING_FAILED = 441;
    121
    122    /**
    123     * NNTP reply code {@value}.
    124     *
    125     * @since 2.2 - corrected value to 480
    126     */
    127    public static final int AUTHENTICATION_REQUIRED = 480;
    128
    129    /** NNTP reply code {@value}. */
    130    public static final int AUTHENTICATION_REJECTED = 482;
    131
    132    /** NNTP reply code {@value}. */
    133    public static final int COMMAND_NOT_RECOGNIZED = 500;
    134
    135    /** NNTP reply code {@value}. */
    136    public static final int COMMAND_SYNTAX_ERROR = 501;
    137
    138    /** NNTP reply code {@value}. */
    139    public static final int PERMISSION_DENIED = 502;
    140
    141    /** NNTP reply code {@value}. */
    142    public static final int PROGRAM_FAULT = 503;
    143
    144    /**
    145     * Tests if a reply code is an informational response. All codes beginning with a 1 are positive informational responses. Informational responses are
    146     * used to provide human-readable information such as help text.
    147     *
    148     * @param reply The reply code to test.
    149     * @return True if a reply code is an informational response, false if not.
    150     */
    151    public static boolean isInformational(final int reply) {
    152        return reply >= 100 && reply < 200;
    153    }
    154
    155    /**
    156     * Tests if a reply code is a negative permanent response. All codes beginning with a 5 are negative permanent responses. The NNTP server will send a
    157     * negative permanent response when it does not implement a command, a command is incorrectly formatted, or a serious program error occurs.
    158     *
    159     * @param reply The reply code to test.
    160     * @return True if a reply code is a negative permanent response, false if not.
    161     */
    162    public static boolean isNegativePermanent(final int reply) {
    163        return reply >= 500 && reply < 600;
    164    }
    165
    166    /**
    167     * Tests if a reply code is a negative transient response. All codes beginning with a 4 are negative transient responses. The NNTP server will send a
    168     * negative transient response on the failure of a correctly formatted command that could not be performed for some reason. For example, retrieving an
    169     * article that does not exist will result in a negative transient response.
    170     *
    171     * @param reply The reply code to test.
    172     * @return True if a reply code is a negative transient response, false if not.
    173     */
    174    public static boolean isNegativeTransient(final int reply) {
    175        return reply >= 400 && reply < 500;
    176    }
    177
    178    /**
    179     * Tests if a reply code is a positive completion response. All codes beginning with a 2 are positive completion responses. The NNTP server will send a
    180     * positive completion response on the final successful completion of a command.
    181     *
    182     * @param reply The reply code to test.
    183     * @return True if a reply code is a positive completion response, false if not.
    184     */
    185    public static boolean isPositiveCompletion(final int reply) {
    186        return reply >= 200 && reply < 300;
    187    }
    188
    189    /**
    190     * Tests if a reply code is a positive intermediate response. All codes beginning with a 3 are positive intermediate responses. The NNTP server will
    191     * send a positive intermediate response on the successful completion of one part of a multipart command or sequence of commands. For example, after a
    192     * successful POST command, a positive intermediate response will be sent to indicate that the server is ready to receive the article to be posted.
    193     *
    194     * @param reply The reply code to test.
    195     * @return True if a reply code is a positive intermediate response, false if not.
    196     */
    197    public static boolean isPositiveIntermediate(final int reply) {
    198        return reply >= 300 && reply < 400;
    199    }
    200
    201    private NNTPReply() {
    202    }
    203
    204}