package com.fsck.k9.mail.internet; import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; import org.apache.commons.io.IOUtils; import org.apache.james.mime4j.util.MimeUtil; import com.fsck.k9.mail.CompositeBody; import com.fsck.k9.mail.MessagingException; /** * A {@link BinaryTempFileBody} extension containing a body of type * message/rfc822. This relates to a BinaryTempFileBody the same way that a * {@link LocalAttachmentMessageBody} relates to a {@link LocalAttachmentBody}. * */ public class BinaryTempFileMessageBody extends BinaryTempFileBody implements CompositeBody { @Override public void setEncoding(String encoding) throws MessagingException { if (!MimeUtil.ENC_7BIT.equalsIgnoreCase(encoding) && !MimeUtil.ENC_8BIT.equalsIgnoreCase(encoding)) { throw new MessagingException( "Incompatible content-transfer-encoding applied to a CompositeBody"); } mEncoding = encoding; } @Override public void writeTo(OutputStream out) throws IOException, MessagingException { InputStream in = getInputStream(); try { if (MimeUtil.ENC_7BIT.equalsIgnoreCase(mEncoding)) { /* * If we knew the message was already 7bit clean, then it * could be sent along without processing. But since we * don't know, we recursively parse it. */ MimeMessage message = new MimeMessage(in, true); message.setUsing7bitTransport(); message.writeTo(out); } else { IOUtils.copy(in, out); } } finally { in.close(); } } @Override public void setUsing7bitTransport() throws MessagingException { /* * There's nothing to recurse into here, so there's nothing to do. * The enclosing BodyPart already called setEncoding(MimeUtil.ENC_7BIT). Once * writeTo() is called, the file with the rfc822 body will be opened * for reading and will then be recursed. */ } }