1 /* 2 * Licensed to the Apache Software Foundation (ASF) under one or more 3 * contributor license agreements. See the NOTICE file distributed with 4 * this work for additional information regarding copyright ownership. 5 * The ASF licenses this file to You under the Apache License, Version 2.0 6 * (the "License"); you may not use this file except in compliance with 7 * the License. You may obtain a copy of the License at 8 * 9 * http://www.apache.org/licenses/LICENSE-2.0 10 * 11 * Unless required by applicable law or agreed to in writing, software 12 * distributed under the License is distributed on an "AS IS" BASIS, 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 * See the License for the specific language governing permissions and 15 * limitations under the License. 16 */ 17 18 package java.net; 19 20 import java.io.UnsupportedEncodingException; 21 import java.nio.charset.Charset; 22 import java.nio.charset.Charsets; 23 import libcore.net.UriCodec; 24 25 /** 26 * This class is used to encode a string using the format required by 27 * {@code application/x-www-form-urlencoded} MIME content type. 28 * 29 * <p>All characters except letters ('a'..'z', 'A'..'Z') and numbers ('0'..'9') 30 * and characters '.', '-', '*', '_' are converted into their hexadecimal value 31 * prepended by '%'. For example: '#' -> %23. In addition, spaces are 32 * substituted by '+'. 33 */ 34 public class URLEncoder { 35 private URLEncoder() {} 36 37 static UriCodec ENCODER = new UriCodec() { 38 @Override protected boolean isRetained(char c) { 39 return " .-*_".indexOf(c) != -1; 40 } 41 }; 42 43 /** 44 * Equivalent to {@code encode(s, "UTF-8")}. 45 * 46 * @deprecated use {@link #encode(String, String)} instead. 47 */ 48 @Deprecated 49 public static String encode(String s) { 50 return ENCODER.encode(s, Charsets.UTF_8); 51 } 52 53 /** 54 * Encodes {@code s} using the {@link Charset} named by {@code charsetName}. 55 */ 56 public static String encode(String s, String charsetName) throws UnsupportedEncodingException { 57 return ENCODER.encode(s, Charset.forName(charsetName)); 58 } 59 } 60
