| /**************************************************************** |
| * 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.james.mime4j; |
| |
| import org.apache.james.mime4j.decoder.Base64InputStream; |
| import org.apache.james.mime4j.decoder.QuotedPrintableInputStream; |
| import org.apache.james.mime4j.field.Field; |
| import org.apache.james.mime4j.message.Header; |
| |
| import java.io.InputStream; |
| import java.io.IOException; |
| |
| /** |
| * Abstract implementation of ContentHandler that automates common |
| * tasks. Currently performs header parsing and applies content-transfer |
| * decoding to body parts. |
| * |
| * |
| */ |
| public abstract class SimpleContentHandler extends AbstractContentHandler { |
| |
| /** |
| * Called after headers are parsed. |
| */ |
| public abstract void headers(Header header); |
| |
| /** |
| * Called when the body of a discrete (non-multipart) entity is encountered. |
| |
| * @param bd encapsulates the values (either read from the |
| * message stream or, if not present, determined implictly |
| * as described in the |
| * MIME rfc:s) of the <code>Content-Type</code> and |
| * <code>Content-Transfer-Encoding</code> header fields. |
| * @param is the contents of the body. Base64 or quoted-printable |
| * decoding will be applied transparently. |
| * @throws IOException should be thrown on I/O errors. |
| */ |
| public abstract void bodyDecoded(BodyDescriptor bd, InputStream is) throws IOException; |
| |
| |
| /* Implement introduced callbacks. */ |
| |
| private Header currHeader; |
| |
| /** |
| * @see org.apache.james.mime4j.AbstractContentHandler#startHeader() |
| */ |
| public final void startHeader() { |
| currHeader = new Header(); |
| } |
| |
| /** |
| * @see org.apache.james.mime4j.AbstractContentHandler#field(java.lang.String) |
| */ |
| public final void field(String fieldData) { |
| currHeader.addField(Field.parse(fieldData)); |
| } |
| |
| /** |
| * @see org.apache.james.mime4j.AbstractContentHandler#endHeader() |
| */ |
| public final void endHeader() { |
| Header tmp = currHeader; |
| currHeader = null; |
| headers(tmp); |
| } |
| |
| /** |
| * @see org.apache.james.mime4j.AbstractContentHandler#body(org.apache.james.mime4j.BodyDescriptor, java.io.InputStream) |
| */ |
| public final void body(BodyDescriptor bd, InputStream is) throws IOException { |
| if (bd.isBase64Encoded()) { |
| bodyDecoded(bd, new Base64InputStream(is)); |
| } |
| else if (bd.isQuotedPrintableEncoded()) { |
| bodyDecoded(bd, new QuotedPrintableInputStream(is)); |
| } |
| else { |
| bodyDecoded(bd, is); |
| } |
| } |
| } |