1 /*
2 * Copyright 2014 The Netty Project
3 *
4 * The Netty Project licenses this file to you under the Apache License,
5 * version 2.0 (the "License"); you may not use this file except in compliance
6 * with the License. You may obtain a copy of the License at:
7 *
8 * https://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
12 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
13 * License for the specific language governing permissions and limitations
14 * under the License.
15 */
16
17 package io.netty5.handler.codec.http;
18
19 import io.netty5.util.AsciiString;
20
21 /**
22 * The class of HTTP status.
23 */
24 public enum HttpStatusClass {
25 /**
26 * The informational class (1xx)
27 */
28 INFORMATIONAL(100, 200, "Informational"),
29 /**
30 * The success class (2xx)
31 */
32 SUCCESS(200, 300, "Success"),
33 /**
34 * The redirection class (3xx)
35 */
36 REDIRECTION(300, 400, "Redirection"),
37 /**
38 * The client error class (4xx)
39 */
40 CLIENT_ERROR(400, 500, "Client Error"),
41 /**
42 * The server error class (5xx)
43 */
44 SERVER_ERROR(500, 600, "Server Error"),
45 /**
46 * The unknown class
47 */
48 UNKNOWN(0, 0, "Unknown Status") {
49 @Override
50 public boolean contains(int code) {
51 return code < 100 || code >= 600;
52 }
53 };
54
55 /**
56 * Returns the class of the specified HTTP status code.
57 */
58 public static HttpStatusClass valueOf(int code) {
59 if (INFORMATIONAL.contains(code)) {
60 return INFORMATIONAL;
61 }
62 if (SUCCESS.contains(code)) {
63 return SUCCESS;
64 }
65 if (REDIRECTION.contains(code)) {
66 return REDIRECTION;
67 }
68 if (CLIENT_ERROR.contains(code)) {
69 return CLIENT_ERROR;
70 }
71 if (SERVER_ERROR.contains(code)) {
72 return SERVER_ERROR;
73 }
74 return UNKNOWN;
75 }
76
77 /**
78 * Returns the class of the specified HTTP status code.
79 * @param code Just the numeric portion of the http status code.
80 */
81 public static HttpStatusClass valueOf(CharSequence code) {
82 if (code != null && code.length() == 3) {
83 char c0 = code.charAt(0);
84 return isDigit(c0) && isDigit(code.charAt(1)) && isDigit(code.charAt(2)) ? valueOf(digit(c0) * 100)
85 : UNKNOWN;
86 }
87 return UNKNOWN;
88 }
89
90 private static int digit(char c) {
91 return c - '0';
92 }
93
94 private static boolean isDigit(char c) {
95 return c >= '0' && c <= '9';
96 }
97
98 private final int min;
99 private final int max;
100 private final AsciiString defaultReasonPhrase;
101
102 HttpStatusClass(int min, int max, String defaultReasonPhrase) {
103 this.min = min;
104 this.max = max;
105 this.defaultReasonPhrase = AsciiString.cached(defaultReasonPhrase);
106 }
107
108 /**
109 * Returns {@code true} if and only if the specified HTTP status code falls into this class.
110 */
111 public boolean contains(int code) {
112 return code >= min && code < max;
113 }
114
115 /**
116 * Returns the default reason phrase of this HTTP status class.
117 */
118 AsciiString defaultReasonPhrase() {
119 return defaultReasonPhrase;
120 }
121 }