seems simple

HCL Notes/Domino 8.5 Forum (includes Notes Traveler)

Subject:

seems simple

the notesimage is just the identifier as it seems:

$ perl -MMIME::Base64 -e 'print decode_base64("xP8gAAEAAQAAAAgAAAAAAAAAAAAAAAAAU1RHNjI2NTeVACYAAAAAAAAAAAAAAAAAAAAAAAAA0wF/ AAAAAAAAAAAAAAAAAA==")' | hexdump -C
00000000 c4 ff 20 00 01 00 01 00 00 00 08 00 00 00 00 00 |.. .............|
00000010 00 00 00 00 00 00 00 00 53 54 47 36 32 36 35 37 |........STG62657|
00000020 95 00 26 00 00 00 00 00 00 00 00 00 00 00 00 00 |..&.............|
00000030 00 00 00 00 00 00 d3 01 7f 00 00 00 00 00 00 00 |................|
*
0000004

This identifer/name (STG62657) is referred in the file-tag :

<file hosttype="cdstorage" compression="none" flags="storedindoc" encoding="none" name="STG62657" size="2332">

the filedata-tag seems to contain some metainformation (maybe signature, timestamps or something) you can extract the actual image by skipping the first bytes:

$ perl -MMIME::Base64 -e 'undef $/; $f=<>; print decode_base64($f) ' image.base64.txt | hexdump -C | head
00000000 01 00 18 09 01 00 99 00 1c 00 00 00 00 00 00 00 |................|
00000010 00 00 00 00 00 00 00 00 00 00 00 00 00 00 01 00 |................|
00000020 00 00 7d 00 1c 00 00 00 01 00 d3 01 7f 00 d3 08 |..}.............|
00000030 00 00 01 00 00 00 00 00 00 00 00 00 00 00 7c 00 |..............|.|
00000040 de 08 00 00 d3 08 d4 08 47 49 46 38 39 61 d3 01 |........GIF89a..|
00000050 7f 00 e7 00 00 d0 d0 c8 80 80 80 00 00 00 40 40 |..............@@|
00000060 40 ff ff ff 00 00 00 00 00 00 00 00 00 00 00 00 |@...............|
00000070 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
*
00000350 00 00 00 00 00 2c 00 00 00 00 d3 01 7f 00 40 08 |.....,........@.|

trained eyes immediately spot the file magic of a gif file(GIF89a) at offset 0x48, so my guess is you just need to skip these bytes.

Feedback response number WEBB8X9J69 created by ~Mary Kiluplopnivu on 08/17/2012