2016-05-11



Mmh is able to display attachments if one configures handlers for
those MIME types. For instance, I use to-text converters for PDF,
DOC and HTML:

     mhshow-show-text/html: %l w3m -dump -T text/html %f
     mhshow-show-application/pdf: %l pdftotext -layout %f -
     mhshow-show-application/msword: %l antiword %f

Now, I received a message with a PDF attachment (sent from  MacOS
X).  Surprisingly  not  the  to-text-converted contents were dis-
placed but the PDF source code:

     %PDF-1.4
     %äüöß
     2 0 obj
     <</Length 3 0 R/Filter/FlateDecode>>
     stream
     x\234\265[K\217\3436^L\276\347W\370\274@R\353a\331^F^B^CNfR\240\267m
     ^G\350\241\350\251\335-Pt^Kt/\373\367+\211\224D\352\225d\200\305^B
     ^YǑ-\212\344G~\244\264\343I^L\337^N\377^M\3430ګi\235NrX\2648-\303\327
     O\207_?^L\377\302o\366\337\327\277^N\227\267\303,\206yZ\355з?\207^_nb
     ^Prx\373\374\333y^T\333Q\235G\271^]\305yT\376SoG^]\356L\243^Y\347\315
     ^,\356c\335\354\320\335]]6y\206^_\374W\205\203\257\356ˋ^?\376^U.^?^?
     \373\351\360\372v\370\230I\243&m\345\235U^TH^R\201V\373\244\264\357TN
     ^V;\317\344^\345\344p\222\242b\261S[1\374\274\356\326\325\317\372\202
     \237\375i\245>\231|\332W\377\344\315}\212\321^?\212t^G\336.$\314\356
     \376\254 \211PN\300\335 ...

     \&...

     36 0 obj
     <</Title<FEFF004B00610074006A0061002000530065006C006D0069006B006500690074>
     /Author<FEFF004B00610074006A0061002000530065006C006D0069006B006500690074>
     /Creator<FEFF005700720069007400650072>

     /Producer<FEFF004F00700065006E004F0066006600690063006500200034002E0030002E0031>
     /CreationDate(D:20160505130643+02'00')>>

     endobj

     xref
     0 37
     0000000000 65535 f
     0000045490 00000 n
     0000000019 00000 n
     0000002722 00000 n
     0000045634 00000 n
     0000002743 00000 n
     0000004245 00000 n
     ...
     0000046509 00000 n
     0000046652 00000 n
     trailer
     <</Size 37/Root 35 0 R
     /Info 36 0 R
     /ID [ <6C40DFFFD2A850A5433BD06D70FD950D>
     <6C40DFFFD2A850A5433BD06D70FD950D> ]
     /DocChecksum /543C61507C2F79A201BCDE859793C6CB
     >>
     startxref
     46978
     %%EOF

(Interesting is the second line, comment with  Umlauts.  Maybe  a
debugging help for encoding problems?)

The reason why the attachment was not automatically converted  to
plain  text,  was  the MIME type the MacOS X mail client used for
the attachment:

     Content-Type: text/x-csrc; name="foo.pdf"
     Content-Transfer-Encoding: base64
     Content-Disposition: attachment; filename="foo.pdf"

The MIME type should have been  ``application/pdf''  but  it  was
``text/x-csrc''   --  i.e.  source  code  in  the  C  programming
language.  I have no clue how this happened, as there is no  rea-
son for this choice.



http://marmaro.de/lue/        markus schnalke <meillo@marmaro.de>