Java Path Normalize normalize(String path)

Description

Removes things like <segment>/../ or ./, as described in RFC 2396 in step 6 of section 5.2.

License

Apache License

Declaration

private static String normalize(String path) 

Method Source Code

//package com.java2s;
/*/* ww w .  j av a2s . c o m*/
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.
 */

public class Main {
    /**
     * Removes things like <segment>/../ or ./, as described in RFC 2396 in
     * step 6 of section 5.2.
     */
    private static String normalize(String path) {
        // replace all /./ with /
        int i = path.indexOf("/./");
        while (i > -1) {
            path = path.substring(0, i + 1) + path.substring(i + 3);
            i = path.indexOf("/./");
        }

        if (path.endsWith("/."))
            path = path.substring(0, path.length() - 1);

        int f = path.indexOf("/../");
        while (f > 0) {
            int sb = path.lastIndexOf("/", f - 1);
            if (sb > -1)
                path = path.substring(0, sb + 1) + (path.length() >= f + 4 ? path.substring(f + 4) : "");
            f = path.indexOf("/../");
        }

        if (path.length() > 3 && path.endsWith("/..")) {
            int sb = path.lastIndexOf("/", path.length() - 4);
            String segment = path.substring(sb, path.length() - 3);
            if (!segment.equals("..")) {
                path = path.substring(0, sb + 1);
            }
        }

        return path;
    }
}

Related

1. normalize(String path)
2. normalize(String path)
3. normalize(String path)
4. normalize(String path)
5. normalize(String path)
6. normalize(String path)
7. normalize(String path)
8. normalize(String path, String separator)
9. normalize(String pathname, int len, int off)