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/*
* ====================================================================
* 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.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* .
*
*/
package org.apache.http;
/**
* Signals that an HTTP exception has occurred.
*
* @since 4.0
*/
public class HttpException extends Exception {
private static final int FIRST_VALID_CHAR = 32;
private static final long serialVersionUID = -5437299376222011036L;
/**
* Converts characters < 32 to hex.
*
* @param message
* the source string.
* @return a converted string.
*/
static String clean(final String message) {
final char[] chars = message.toCharArray();
int i;
// First check to see if need to allocate a new StringBuilder
for (i = 0; i < chars.length; i++) {
if (chars[i] < FIRST_VALID_CHAR) {
break;
}
}
if (i == chars.length) {
return message;
}
final StringBuilder builder = new StringBuilder(chars.length * 2);
for (i = 0; i < chars.length; i++) {
final char ch = chars[i];
if (ch < FIRST_VALID_CHAR) {
builder.append("[0x");
final String hexString = Integer.toHexString(i);
if (hexString.length() == 1) {
builder.append("0");
}
builder.append(hexString);
builder.append("]");
} else {
builder.append(ch);
}
}
return builder.toString();
}
/**
* Creates a new HttpException with a {@code null} detail message.
*/
public HttpException() {
super();
}
/**
* Creates a new HttpException with the specified detail message.
*
* @param message
* the exception detail message
*/
public HttpException(final String message) {
super(clean(message));
}
/**
* Creates a new HttpException with the specified detail message and cause.
*
* @param message
* the exception detail message
* @param cause
* the {@code Throwable} that caused this exception, or
* {@code null} if the cause is unavailable, unknown, or not a
* {@code Throwable}
*/
public HttpException(final String message, final Throwable cause) {
super(clean(message));
initCause(cause);
}
}