Android URL Normalize normalizeUrl(String url)

Description

Simple url normalization that adds http:// if no scheme exists, and strips empty paths, e.g., www.google.com/ -> http://www.google.com.

License

Apache License

Declaration

@VisibleForTesting
static String normalizeUrl(String url) 

Method Source Code

//package com.java2s;
/*//from  ww  w . ja  v  a 2s .  c om
 * Copyright (C) 2010 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.
 */

import com.google.common.annotations.VisibleForTesting;

public class Main {
    private static final String SCHEME_SEPARATOR = "://";
    private static final String DEFAULT_SCHEME = "http";

    /**
     * Simple url normalization that adds http:// if no scheme exists, and
     * strips empty paths, e.g.,
     * www.google.com/ -> http://www.google.com.  Used to prevent obvious
     * duplication of nav suggestions, bookmarks and urls entered by the user.
     */
    @VisibleForTesting
    static String normalizeUrl(String url) {
        String normalized;
        if (url != null) {
            int start;
            int schemePos = url.indexOf(SCHEME_SEPARATOR);
            if (schemePos == -1) {
                // no scheme - add the default
                normalized = DEFAULT_SCHEME + SCHEME_SEPARATOR + url;
                start = DEFAULT_SCHEME.length() + SCHEME_SEPARATOR.length();
            } else {
                normalized = url;
                start = schemePos + SCHEME_SEPARATOR.length();
            }
            int end = normalized.length();
            if (normalized.indexOf('/', start) == end - 1) {
                end--;
            }
            return normalized.substring(0, end);
        }
        return url;
    }
}