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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The ASF licenses this file to You under the Apache License, Version 2.0
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* (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.apache.org/licenses/LICENSE-2.0
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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/* $Id: DataURLUtil.java 695225 2008-09-14 14:31:20Z jeremias $ */
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package org.apache.xmlgraphics.util.uri;
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import java.io.IOException;
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import java.io.InputStream;
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import java.io.StringWriter;
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import java.io.Writer;
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import org.apache.commons.io.IOUtils;
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import org.apache.xmlgraphics.util.WriterOutputStream;
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import org.apache.xmlgraphics.util.io.Base64EncodeStream;
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* Utility classes for generating RFC 2397 data URLs.
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public class DataURLUtil {
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* Creates a new data URL and returns it as a String.
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* @param in the InputStream to read the data from
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* @param mediatype the MIME type of the content, or null
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* @return the newly created data URL
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* @throws IOException if an I/O error occurs
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public static String createDataURL(InputStream in, String mediatype) throws IOException {
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StringWriter writer = new StringWriter();
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writeDataURL(in, mediatype, writer);
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return writer.toString();
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* Generates a data URL and writes it to a Writer.
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* @param in the InputStream to read the data from
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* @param mediatype the MIME type of the content, or null
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* @param writer the Writer to write to
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* @throws IOException if an I/O error occurs
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public static void writeDataURL(InputStream in, String mediatype, Writer writer)
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writer.write("data:");
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if (mediatype != null) {
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writer.write(mediatype);
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writer.write(";base64,");
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Base64EncodeStream out = new Base64EncodeStream(
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new WriterOutputStream(writer, "US-ASCII"), false);
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IOUtils.copy(in, out);