// Copyright (C) 2012 The Android Open Source Project
//
// Licensed 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.
package com.google.gerrit.extensions.restapi;
import java.io.UnsupportedEncodingException;
import java.net.URLDecoder;
import java.net.URLEncoder;
/** URL related utility functions. */
public final class Url {
/**
* Encode a path segment, escaping characters not valid for a URL.
* <p>
* The following characters are not escaped:
* <ul>
* <li>{@code a..z, A..Z, 0..9}
* <li>{@code . - * _}
* </ul>
* <p>
* ' ' (space) is encoded as '+'.
* <p>
* All other characters (including '/') are converted to the triplet "%xy"
* where "xy" is the hex representation of the character in UTF-8.
*
* @param component a string containing text to encode.
* @return a string with all invalid URL characters escaped.
*/
public static String encode(String component) {
if (component != null) {
try {
return URLEncoder.encode(component, "UTF-8");
} catch (UnsupportedEncodingException e) {
throw new RuntimeException("JVM must support UTF-8", e);
}
}
return null;
}
/** Decode a URL encoded string, e.g. from {@code "%2F"} to {@code "/"}. */
public static String decode(String str) {
if (str != null) {
try {
return URLDecoder.decode(str, "UTF-8");
} catch (UnsupportedEncodingException e) {
throw new RuntimeException("JVM must support UTF-8", e);
}
}
return null;
}
private Url() {
}
}