| // *************************************************************************************************************************** |
| // * Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements. See the NOTICE file * |
| // * distributed with this work for additional information regarding copyright ownership. The ASF licenses this file * |
| // * to you 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.juneau.http; |
| |
| import static org.apache.juneau.internal.StringUtils.*; |
| |
| import org.apache.juneau.http.annotation.*; |
| import org.apache.juneau.internal.*; |
| |
| /** |
| * Represents a parsed <l>Retry-After</l> HTTP response header. |
| * |
| * <p> |
| * If an entity is temporarily unavailable, this instructs the client to try again later. |
| * Value could be a specified period of time (in seconds) or a HTTP-date. |
| * |
| * <h5 class='figure'>Example</h5> |
| * <p class='bcode w800'> |
| * Retry-After: 120 |
| * Retry-After: Fri, 07 Nov 2014 23:59:59 GMT |
| * </p> |
| * |
| * <h5 class='topic'>RFC2616 Specification</h5> |
| * |
| * The Retry-After response-header field can be used with a 503 (Service Unavailable) response to indicate how long the |
| * service is expected to be unavailable to the requesting client. |
| * This field MAY also be used with any 3xx (Redirection) response to indicate the minimum time the user-agent is asked |
| * wait before issuing the redirected request. |
| * The value of this field can be either an HTTP-date or an integer number of seconds (in decimal) after the time of the |
| * response. |
| * |
| * <p class='bcode w800'> |
| * Retry-After = "Retry-After" ":" ( HTTP-date | delta-seconds ) |
| * </p> |
| * |
| * <p> |
| * Two examples of its use are |
| * <p class='bcode w800'> |
| * Retry-After: Fri, 31 Dec 1999 23:59:59 GMT |
| * Retry-After: 120 |
| * </p> |
| * |
| * <p> |
| * In the latter example, the delay is 2 minutes. |
| * |
| * <ul class='seealso'> |
| * <li class='extlink'>{@doc RFC2616} |
| * </ul> |
| */ |
| @Header("Retry-After") |
| public final class RetryAfter extends HeaderString { |
| |
| /** |
| * Returns a parsed <c>Retry-After</c> header. |
| * |
| * @param value The <c>Retry-After</c> header string. |
| * @return The parsed <c>Retry-After</c> header, or <jk>null</jk> if the string was null. |
| */ |
| public static RetryAfter forString(String value) { |
| if (value == null) |
| return null; |
| return new RetryAfter(value); |
| } |
| |
| private RetryAfter(String value) { |
| super(value); |
| } |
| |
| /** |
| * Returns this header value as a {@link java.util.Date} object. |
| * |
| * @return This header value as a {@link java.util.Date} object, or <jk>null</jk> if the value is not a date. |
| */ |
| public java.util.Date asDate() { |
| char c0 = charAt(value, 0); |
| if (c0 >= '0' && c0 <= '9') |
| return null; |
| return DateUtils.parseDate(toString()); |
| } |
| |
| /** |
| * Returns this header value as an integer. |
| * |
| * @return This header value as a integer, or <c>-1</c> if the value is not an integer. |
| */ |
| public int asInt() { |
| char c0 = charAt(value, 0); |
| if (c0 >= '0' && c0 <= '9') { |
| try { |
| return Integer.parseInt(value); |
| } catch (NumberFormatException e) { |
| return -1; |
| } |
| } |
| return -1; |
| } |
| } |