home | career | drupal | java | mac | mysql | perl | scala | uml | unix

Tomcat example source code file (ContentType.java)

This example Tomcat source code file (ContentType.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Tomcat tags/keywords

contenttype, contenttype, string, string

The Tomcat ContentType.java source code

/*
 *  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.
 */

package org.apache.tomcat.util.http;


/**
 * Usefull methods for Content-Type processing
 * 
 * @author James Duncan Davidson [duncan@eng.sun.com]
 * @author James Todd [gonzo@eng.sun.com]
 * @author Jason Hunter [jch@eng.sun.com]
 * @author Harish Prabandham
 * @author costin@eng.sun.com
 */
public class ContentType {

    /**
     * Parse the character encoding from the specified content type header.
     * If the content type is null, or there is no explicit character encoding,
     * <code>null is returned.
     *
     * @param contentType a content type header
     */
    public static String getCharsetFromContentType(String contentType) {

        if (contentType == null)
            return (null);
        int start = contentType.indexOf("charset=");
        if (start < 0)
            return (null);
        String encoding = contentType.substring(start + 8);
        int end = encoding.indexOf(';');
        if (end >= 0)
            encoding = encoding.substring(0, end);
        encoding = encoding.trim();
        if ((encoding.length() > 2) && (encoding.startsWith("\""))
            && (encoding.endsWith("\"")))
            encoding = encoding.substring(1, encoding.length() - 1);
        return (encoding.trim());

    }


    /**
     * Returns true if the given content type contains a charset component,
     * false otherwise.
     *
     * @param type Content type
     * @return true if the given content type contains a charset component,
     * false otherwise
     */
    public static boolean hasCharset(String type) {

        boolean hasCharset = false;

        int len = type.length();
        int index = type.indexOf(';');
        while (index != -1) {
            index++;
            while (index < len && Character.isSpace(type.charAt(index))) {
                index++;
            }
            if (index+8 < len
                    && type.charAt(index) == 'c'
                    && type.charAt(index+1) == 'h'
                    && type.charAt(index+2) == 'a'
                    && type.charAt(index+3) == 'r'
                    && type.charAt(index+4) == 's'
                    && type.charAt(index+5) == 'e'
                    && type.charAt(index+6) == 't'
                    && type.charAt(index+7) == '=') {
                hasCharset = true;
                break;
            }
            index = type.indexOf(';', index);
        }

        return hasCharset;
    }

}

Other Tomcat examples (source code examples)

Here is a short list of links related to this Tomcat ContentType.java source code file:

new blog posts

 

Copyright 1998-2014 Alvin Alexander, alvinalexander.com
All Rights Reserved.