Multipart/related part specifiers

Question

Hi, this query is perhaps the result of my own limited knowledge regarding MIME types and part specifiers but here goes....
Based on the following BODYSTRUCTURE, I am attempting to determine the associated part specifiers so I may get the MIME headers for said part (i.e. A12 UID FETCH 147859 (BODY.PEEK[1.MIME])).
A11 UID FETCH 147859 (BODYSTRUCTURE)
* 1 FETCH (BODYSTRUCTURE (("TEXT" "PLAIN" ("CHARSET" "US-ASCII") NIL NIL "QUOTED-PRINTABLE" 911 16 NIL NIL NIL)(("TEXT" "HTML" ("CHARSET" "US-ASCII") NIL NIL "QUOTED-PRINTABLE" 2716 46 NIL NIL NIL)("IMAGE" "BMP" ("name" "ExchangeBabs.bmp") "<297231021@11102006-1D66>" NIL "BASE64" 2634474 NIL ("inline" ("filename" "ExchangeBabs.bmp")) NIL)("APPLICATION" "OCTET-STREAM" ("name" "Presence_K1=XItJBkk1xQi8X5JIgeeyjkn9EJTYKfxg9AogMsw3qHMhNnawbZ5wVWrmDFYTq1yP&MODE=IMG") NIL NIL "BASE64" 732 NIL ("inline" ("filename" "Presence_K1=XItJBkk1xQi8X5JIgeeyjkn9EJTYKfxg9AogMsw3qHMhNnawbZ5wVWrmDFYTq1yP&MODE=IMG")) NIL)("IMAGE" "GIF" ("name" "Blank Bkgrd.gif") "<297231021@11102006-1D6D>" NIL "BASE64" 202 NIL ("inline" ("filename" "Blank Bkgrd.gif")) NIL) "related" ("boundary" "-------45363d5545363d55") NIL NIL) "alternative" ("boundary" "-------446e3c8d446e3c8d") NIL NIL) UID 147859)
The com.sun.mail.imap.protocol.BODYSTRUCTURE object generated is shown below (I've omitted most of the fields and left what I considered relevent, simply enough to show the nesting):
bs= BODYSTRUCTURE  (id=181)
     bodies= BODYSTRUCTURE[2]  (id=199)
          [0]= BODYSTRUCTURE  (id=207)
               bodies= null
               encoding= "QUOTED-PRINTABLE"
               subtype= "PLAIN"
               type= "TEXT"
          [1]= BODYSTRUCTURE  (id=208)
               bodies= BODYSTRUCTURE[4]  (id=213)
                    [0]= BODYSTRUCTURE  (id=216)
                         bodies= null
                         encoding= "QUOTED-PRINTABLE"
                         subtype= "HTML"
                         type= "TEXT"
                    [1]= BODYSTRUCTURE  (id=217)
                         bodies= null
                         encoding= "BASE64"
                         subtype= "BMP"
                         type= "IMAGE"
                    [2]= BODYSTRUCTURE  (id=218)
                         bodies= null
                         encoding= "BASE64"
                         subtype= "OCTET-STREAM"
                         type= "APPLICATION"
                    [3]= BODYSTRUCTURE  (id=219)
                         bodies= null
                         encoding= "BASE64"
                         subtype= "GIF"
                         type= "IMAGE"
               subtype= "related"
               type= "multipart"
     subtype= "alternative"
     type= "multipart"This particular message has a multipart/related content-type:
MIME-Version: 1.0
Content-Type: multipart/related;
     type="text/html";
     boundary="----_=_NextPart_001_01C6ED7A.EC20BF80"So, it has 4 part specifiers, one for each part in multipart/related. Now, the question to all this is can I determine from the BODYSTRUCTURE object what the root part is (i.e. that it's multipart/related)? Or am I going about this the wrong way (i.e. should I be examining the content-type header first to find out that its multipart/related and the first part is "text/html")?

Answer 1

Basically, I'm trying to fetch various attributes of a message. In this case, the MIME headers of the various message parts (perhaps I'm stating the obvious but I'm not sure how to better explain what I'm trying to accomplish).
I've made some "progress". This morning when I continued working with the message described above, all of a sudden, the BODYSTRUCTURE I get back is different and as a result, the BODYSTRUCTURE object generated is different.
1 uid fetch 148032 (BODYSTRUCTURE)
* 1 FETCH (BODYSTRUCTURE (("TEXT" "HTML" ("charset" "iso-8859-1") NIL NIL "QUOTED-PRINTABLE" 2792 47 NIL NIL NIL)("IMAGE" "GIF" ("name" "Blank Bkgrd.gif") "<297231021@11102006-1D6D>" "Blank Bkgrd.gif" "BASE64" 202 NIL ("inline" ("filename" "Blank Bkgrd.gif")) NIL)("IMAGE" "BMP" ("name" "ExchangeBabs.bmp") "<297231021@11102006-1D66>" "ExchangeBabs.bmp" "BASE64" 2630728 NIL ("inline" ("filename" "ExchangeBabs.bmp")) NIL)("APPLICATION" "OCTET-STREAM" ("name" "Presence_K1=XItJBkk1xQi8X5JIgeeyjkn9EJTYKfxg9AogMsw3qHMhNnawbZ5wVWrmDFYTq1yP&MODE=IMG") NIL "Presence_K1=XItJBkk1xQi8X5JIgeeyjkn9EJTYKfxg9AogMsw3qHMhNnawbZ5wVWrmDFYTq1yP&MODE=IMG" "BASE64" 732 NIL ("inline" ("filename" "Presence_K1=XItJBkk1xQi8X5JIgeeyjkn9EJTYKfxg9AogMsw3qHMhNnawbZ5wVWrmDFYTq1yP&MODE=IMG")) NIL) "related" ("type" "text/html" "boundary" "----_=_NextPart_001_01C6ED7A.EC20BF80") NIL NIL) UID 148032)
1 OK FETCH completed.
bs= BODYSTRUCTURE  (id=89)
     bodies= BODYSTRUCTURE[4]  (id=104)
          [0]= BODYSTRUCTURE  (id=115)
               bodies= null
               encoding= "QUOTED-PRINTABLE"
               subtype= "HTML"
               type= "TEXT"
          [1]= BODYSTRUCTURE  (id=116)
               bodies= null
               encoding= "BASE64"
               subtype= "GIF"
               type= "IMAGE"
          [2]= BODYSTRUCTURE  (id=117)
               bodies= null
               encoding= "BASE64"
               subtype= "BMP"
               type= "IMAGE"
          [3]= BODYSTRUCTURE  (id=118)
               bodies= null
               encoding= "BASE64"
               subtype= "OCTET-STREAM"
               type= "APPLICATION"
     encoding= null
     subtype= "related"
     type= "multipart"NOTE: The UID differs from the previous example I'd given because I had archived the message and then moved it back to my Inbox.
Any ideas why the BODYSTRUCTURE reported by the server today is different from what it reported before? I have this message on both an Exchange 2000 and Mirapoint server. 2 days ago they both reported the BODYSTRUCTURE I indicated before, now they both have the BODYSTRUCTURE above.
PS. Sorry that this issue isn't really Javamail related anymore but I'd appreciate any input.