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jsync.io is a non-blocking, event-driven networking framework for Java

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/*
 * Copyright (c) 2011-2013 The original author or authors
 * ------------------------------------------------------
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * and Apache License v2.0 which accompanies this distribution.
 *
 *     The Eclipse Public License is available at
 *     http://www.eclipse.org/legal/epl-v10.html
 *
 *     The Apache License v2.0 is available at
 *     http://www.opensource.org/licenses/apache2.0.php
 *
 * You may elect to redistribute this code under either of these licenses.
 */
package io.jsync.http.impl;


/**
 * Simple parser which helps to parse out parts of uris without to much validation.
 *
 * @author Norman Maurer
 */
final class UriParser {

    private UriParser() {
    }

    /**
     * Extract the path out of the uri.
     */
    static String path(String uri) {
        int i;
        if (uri.charAt(0) == '/') {
            i = 0;
        } else {
            i = uri.indexOf("://");
            if (i == -1) {
                i = 0;
            } else {
                i = uri.indexOf('/', i + 3);
                if (i == -1) {
                    // contains no /
                    return "/";
                }
            }
        }

        int queryStart = uri.indexOf('?', i);
        if (queryStart == -1) {
            queryStart = uri.length();
        }
        return uri.substring(i, queryStart);
    }

    /**
     * Extract the query out of a uri or returns {@code null} if no query was found.
     */
    static String query(String uri) {
        int i = uri.indexOf('?');
        if (i == -1) {
            return null;
        } else {
            return uri.substring(i + 1, uri.length());
        }
    }

}