com.facebook.presto.hive.$internal.jodd.util.URLDecoder Maven / Gradle / Ivy
// Copyright (c) 2003-2014, Jodd Team (com.facebook.presto.hive.$internal.jodd.org). All Rights Reserved.
package com.facebook.presto.hive.$internal.jodd.util;
import com.facebook.presto.hive.$internal.jodd.JoddCore;
import java.io.ByteArrayOutputStream;
import java.io.UnsupportedEncodingException;
/**
* URL decoder.
*/
public class URLDecoder {
/**
* Decodes URL elements.
*/
public static String decode(String url) {
return decode(url, JoddCore.encoding, false);
}
/**
* Decodes URL elements. This method may be used for all
* parts of URL, except for the query parts, since it does
* not decode the '+' character.
* @see #decodeQuery(String, String)
*/
public static String decode(String source, String encoding) {
return decode(source, encoding, false);
}
/**
* Decodes query name or value.
*/
public static String decodeQuery(String source) {
return decode(source, JoddCore.encoding, true);
}
/**
* Decodes query name or value.
*/
public static String decodeQuery(String source, String encoding) {
return decode(source, encoding, true);
}
private static String decode(String source, String encoding, boolean decodePlus) {
int length = source.length();
ByteArrayOutputStream bos = new ByteArrayOutputStream(length);
boolean changed = false;
for (int i = 0; i < length; i++) {
int ch = source.charAt(i);
switch (ch) {
case '%':
if ((i + 2) < length) {
char hex1 = source.charAt(i + 1);
char hex2 = source.charAt(i + 2);
int u = Character.digit(hex1, 16);
int l = Character.digit(hex2, 16);
if (u == -1 || l == -1) {
throw new IllegalArgumentException("Invalid sequence: " + source.substring(i));
}
bos.write((char) ((u << 4) + l));
i += 2;
changed = true;
} else {
throw new IllegalArgumentException("Invalid sequence: " + source.substring(i));
}
break;
case '+':
if (decodePlus) {
ch = ' ';
changed = true;
}
default:
bos.write(ch);
}
}
try {
return changed ? new String(bos.toByteArray(), encoding) : source;
} catch (UnsupportedEncodingException ignore) {
return null;
}
}
}