/*
* ====================================================================
* 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
* <http://www.apache.org/>.
*
*/
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);
}
}