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a TNEF decoding library written in python, without external dependencies

Project description

tnefparse - TNEF decoding and attachment extraction

This is a pure-python library for decoding Microsoft’s Transport Neutral Encapsulation Format (TNEF), for Python versions 2.7, 3.5+ and PyPy. For more information on TNEF, see for example wikipedia. The full TNEF specification is also available as a PDF download.

A tnefparse command-line utility is provided for listing contents of TNEF files, extracting attachments found inside them and so on:

usage: tnefparse [-h] [-o] [-a] [-p PATH] [-b] [-hb]
                 [-l LEVEL] [-c]
                 file [file ...]

Extract TNEF file contents. Show this help message if no arguments are given.

positional arguments:
  file                  space-separated list of paths to the TNEF files

optional arguments:
  -h, --help             show this help message and exit
  -o, --overview         show (possibly long) overview of TNEF file contents
  -a, --attachments      extract attachments, by default to current dir
  -p PATH, --path PATH   optional explicit path to extract attachments to
  -b, --body             extract the body to stdout
  -hb, --htmlbody        extract the HTML body to stdout
  -rb, --rtfbody         extract the RTF body to stdout
  -l LEVEL, --log LEVEL  set log level to DEBUG, INFO, WARN or ERROR
  -c, --checksum         calculate checksums (off by default)

The library can also be used as a basis for applications that need to parse TNEF. To parse a TNEF attachment, run eg. :

>>> from tnefparse import TNEF
>>> with open("tests/examples/one-file.tnef", "rb") as tneffile:
...    tnefobj = TNEF(

The parsed attachment contents are then available as TNEF object attributes:

  • signature - TNEF file signature
  • key - generated by TNEF enabled transports before using the TNEF implementation to generate a TNEF stream
  • codepage - a Windows code page string
  • objects - a collection of TNEFObject instances
  • attachments - a collection of TNEFAttachment instances
  • mapiprops - a collection of MAPI properties represented by TNEFMAPI_Attribute instances
  • body - message body (may contain both HTML and RTF)
  • htmlbody - a string containing just the HTML message body
  • rtfbody - just the RTF body

Some of the above properties may be empty, depending on what’s contained in the attachment that was parsed.

Use python test to run the tests.

Issues and pull requests welcome. Please however always provide an example TNEF file that can be used to demonstrate the bug or desired behavior, if at all possible.

Note: If you have understanding of TNEF and/or MIME internals or just need this package and want to help with maintaining it, I am open to giving you commit rights. Just let me know.

tnefparse 1.3.0 (2018-12-01)

  • drop Python 2.6 & 3.3 support
  • Python 2/3 compatibility fixes
  • more tests & example files (jrideout)
  • overall improved testing & start tracking coverage
  • lots of parsing improvements (jrideout)
  • turn some unnecessary warnings into debug messages
  • add tnefparse -p | –path option for setting attachment extraction path
  • support more MAPI (PidTag) properties (jrideout)
  • support RTF body extraction (jrideout)
  • support extracting top level object attributues in msgprops (jrideout)
  • util.raw_mapi & tnefparse.parseFile functions will be deprecated after 1.3

tnefparse 1.2.3, 2018-11-14

  • misc. fixes

tnefparse 1.2.2, 2017

  • have TNEF init raise ValueError on invalid TNEF signature, rather than calling sys.exit()
  • parseFile convenience function should not expect a self parameter, removed
  • other misc. fixes

tnefparse 1.2.1, 2013

  • Python 3 compatibility; tests pass on Python 2.6/2.7/3.2/3.3
  • add package to travis ci
  • add tox.ini for testing using

tnefparse 1.2, 2013

  • performance improvements & bug fixes (Dave Baggett)
  • added to_zip function for converting TNEF attachments into ZIPped ones (Dave Baggett)
  • tnefparse is now used in the inky email client from Arcode

tnefparse 1.1.1, 08/2012 (unreleased)

  • fixed entry point bug that caused ‘tnefparse’ cmd-line invocation to fail

tnefparse 1.1, 03/2012

  • Repackaged and renamed the library
  • Code moved to github
  • Use the stdlib logging module
  • Further bug fixes and enhancements to pure-python code
  • Add a command-line script
  • Drop the unix tnef command-line tool wrapper

pytnef 0.2.1-Novell, circa 2010

  • Bug fixes/enhancements to pure-python code (Tom Doman)

pytnef 0.2, circa 2005

  • Added a wrapper for the unix tnef command-line tool (Petri Savolainen)
  • Pure-python code not very useful yet

pytnef 0.1 - circa 2005

  • First version (pure-python) created as a conversion of a Ruby TNEF decoder by Trevor Scheroeder (Petri Savolainen)

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