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// 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 static java.nio.charset.StandardCharsets.UTF_8;

import com.google.gerrit.common.Nullable;
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.
   *
   * 

The following characters are not escaped: * *

    *
  • {@code a..z, A..Z, 0..9} *
  • {@code . - * _} *
* *

' ' (space) is encoded as '+'. * *

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. */ @Nullable public static String encode(String component) { if (component != null) { try { return URLEncoder.encode(component, UTF_8.name()); } 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 "/"}. */ @Nullable public static String decode(String str) { if (str != null) { try { return URLDecoder.decode(str, UTF_8.name()); } catch (UnsupportedEncodingException e) { throw new RuntimeException("JVM must support UTF-8", e); } } return null; } private Url() {} }





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