Hello,
I am trying to get
the base64 content of a MimePart
in a MimeMultiPart, but I'm struggling with
the Javamail package. I simply want
the base64 encoded
String of a certain inline image, there doesn't seem to be an easy way to do this though.
I wrote a method that will take
the mime content (as a string)
and an image name as a parameter,
and searches for
the part that contains
the base64 content of that image name,
and in the end returns this base64
string (as well as
the content type but that
is irrelevant for this question)
Here
is the relevant code:
private static String[] getBase64Content(String imageName,
String mimeString) throws MessagingException, IOException
{
System.out.println("image name: " + imageName + "\n\n");
System.out.println("mime string: " + mimeString);
String[] base64Content = new String[2];
base64Content[0] = "";
base64Content[1] = "image/jpeg"; //some default value
DataSource source = new ByteArrayDataSource(new ByteArrayInputStream(mimeString.getBytes()), "multipart/mixed");
MimeMultipart mp = new MimeMultipart(source);
for (int i = 0; i < mp.getCount(); i++)
{
MimePart part = (MimePart) mp.getBodyPart(i);
String disposition = part.getDisposition();
if (disposition != null && disposition.equals(Part.INLINE))
{
if (part.getContentID() != null && part.getContentID().indexOf(imageName) > -1) //check if this
is the right part
{
if (part.getContent() instanceof BASE64DecoderStream)
{
BASE64DecoderStream base64DecoderStream = (BASE64DecoderStream) part.getContent();
StringWriter writer = new StringWriter();
IOUtils.copy(base64DecoderStream, writer);
String base64decodedString = writer.toString();
byte[] encodedMimeByteArray = Base64.encodeBase64(base64decodedString.getBytes());
String encodedMimeString = new String(encodedMimeByteArray);
System.out.println("encoded mime string: " + encodedMimeString);
base64Content[0] = encodedMimeString;
base64Content[1] = getContentTypeString(part);
}
}
}
}
return base64Content;
}
I cannot paste all of
the output as
the post would be too long, but this
is some of it:
image name:
[email protected]
This
is a part of
the mimeString input, it does find this (correct) part with
the image name:
--_004_225726A14AF9134CB538EE7BD44373A04D9E3F3940menexch2007ex_
Content-Type: image/gif; name="image001.gif"
Content-Description: image001.gif
Content-Disposition: inline; filename="image001.gif"; size=1070;
creation-date="Fri, 02 Apr 2010 16:19:43 GMT";
modification-date="Fri, 02 Apr 2010 16:19:43 GMT"
Content-ID: <
[email protected]>
Content-Transfer-Encoding: base64
R0lGODlhEAAQAPcAABxuHJzSlDymHGy2XHTKbITCdNTu1FyqTHTCXJTKhLTarCSKHEy2JHy6bJza
lITKfFzCPEyWPHS+XHzCbJzSjFS+NLTirBx6HHzKdOz27GzCZJTOjCyWHKzWpHy2ZJTGhHS+VLzi
(more base64
string here that I'm not going to paste)
But when it finally prints
the encoded mime
string, this
is a different
string than I was expecting:
encoded mime string: R0lGODlhEAAQAO+/vQAAHG4c77+90pQ877+9HGzvv71cdO+/vWzvv73vv71077+977+977+9XO+/vUx077+9XO+/vcqE77+92qwk77+9HEzvv70kfO+/vWzvv73alO+
Clearly different from
the one that has its output
in the part above. I'm not even sure
what I'm looking at here, but when I try to load this as an image
in a html page, it won't work.
This
is fairly frustrating for me, since all I want
is a piece of
the text that I'm already printing, but I'd rather not have to search through
the mime
string myself for
the correct part, introducing all kinds of bugs.So I'd really prefer to use
the Javamail library but could use some help on how to actually get that correct mime
string.
