io.netty.handler.codec.http.HttpStatusClass Maven / Gradle / Ivy
/*
* Copyright 2014 The Netty Project
*
* The Netty Project 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:
*
* https://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 io.netty.handler.codec.http;
import io.netty.util.AsciiString;
/**
* The class of HTTP status.
*/
public enum HttpStatusClass {
/**
* The informational class (1xx)
*/
INFORMATIONAL(100, 200, "Informational"),
/**
* The success class (2xx)
*/
SUCCESS(200, 300, "Success"),
/**
* The redirection class (3xx)
*/
REDIRECTION(300, 400, "Redirection"),
/**
* The client error class (4xx)
*/
CLIENT_ERROR(400, 500, "Client Error"),
/**
* The server error class (5xx)
*/
SERVER_ERROR(500, 600, "Server Error"),
/**
* The unknown class
*/
UNKNOWN(0, 0, "Unknown Status") {
@Override
public boolean contains(int code) {
return code < 100 || code >= 600;
}
};
private static final HttpStatusClass[] statusArray = new HttpStatusClass[6];
static {
statusArray[1] = INFORMATIONAL;
statusArray[2] = SUCCESS;
statusArray[3] = REDIRECTION;
statusArray[4] = CLIENT_ERROR;
statusArray[5] = SERVER_ERROR;
}
/**
* Returns the class of the specified HTTP status code.
*/
public static HttpStatusClass valueOf(int code) {
if (UNKNOWN.contains(code)) {
return UNKNOWN;
}
return statusArray[fast_div100(code)];
}
/**
* @param dividend Must >= 0
* @return dividend/100
*/
private static int fast_div100(int dividend) {
return (int) ((dividend * 1374389535L) >> 37);
}
/**
* Returns the class of the specified HTTP status code.
* @param code Just the numeric portion of the http status code.
*/
public static HttpStatusClass valueOf(CharSequence code) {
if (code != null && code.length() == 3) {
char c0 = code.charAt(0);
return isDigit(c0) && isDigit(code.charAt(1)) && isDigit(code.charAt(2)) ? valueOf(digit(c0) * 100)
: UNKNOWN;
}
return UNKNOWN;
}
private static int digit(char c) {
return c - '0';
}
private static boolean isDigit(char c) {
return c >= '0' && c <= '9';
}
private final int min;
private final int max;
private final AsciiString defaultReasonPhrase;
HttpStatusClass(int min, int max, String defaultReasonPhrase) {
this.min = min;
this.max = max;
this.defaultReasonPhrase = AsciiString.cached(defaultReasonPhrase);
}
/**
* Returns {@code true} if and only if the specified HTTP status code falls into this class.
*/
public boolean contains(int code) {
return code >= min && code < max;
}
/**
* Returns the default reason phrase of this HTTP status class.
*/
AsciiString defaultReasonPhrase() {
return defaultReasonPhrase;
}
}