December 2002
Intermediate to advanced
288 pages
9h 46m
English
Content preview from Java Enterprise Best PracticesBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Use Multipart/Related for Rich Messages
To ensure that they can be read as easily
as possible, richly formatted messages should be completely
self-contained, instead of relying on images or resources available
on a server. The MIME standard provides another special multipart
type: “related”. Related parts can
refer to each other via URIs pointing to the
Content-ID, or
“CID,” associated with each part. A
CID URI takes the form
“cid:contentid”. You can use the
setHeader( )
method of
MimeBodyPart
to create known content IDs for each message part. Once this is done,
HTML parts can, for example, display an image by referring to the
message part containing the image data.
The following example contains an HTML part that includes an
<img>
tag pointing to the
"cid:myimage" URI. It also contains a second part
containing a GIF image with a content ID of
"myimage".
. . . Message msg = new MimeMessage(session); msg.setFrom(new InternetAddress("images@company.com")); msg.setRecipient(Message.RecipientType.TO, new InternetAddress("bob.cratchett@company.com")); msg.setSubject("Image Email"); Multipart multipartRelated = new MimeMultipart("related"); MimeBodyPart mbp = new MimeBodyPart( ); mbp.setContent( "<html><body><img src=\"cid:myimage\"></body></html>", "text/html"); multipartRelated.addBodyPart(mbp); . . . MimeBodyPart mbp2 = new MimeBodyPart( ); mbp2.setDataHandler(new DataHandler(new FileDataSource("c:\\inline.gif"))); mbp2.setFileName("inline.gif"); mbp2.setHeader("Content-ID","myimage"); ...Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.