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POPython - email header decoding UTF-8
 

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    <p>is there any Python module which helps to decode the various forms of encoded mail headers, mainly Subject, to simple - say - UTF-8 strings?</p> <p>Here are example Subject headers from mail files that I have:</p> <pre><code>Subject: [ 201105311136 ]=?UTF-8?B?IMKnIDE2NSBBYnM=?=. 1 AO; Subject: [ 201105161048 ] GewSt:=?UTF-8?B?IFdlZ2ZhbGwgZGVyIFZvcmzDpHVmaWdrZWl0?= Subject: [ 201105191633 ] =?UTF-8?B?IERyZWltb25hdHNmcmlzdCBmw7xyIFZlcnBmbGVndW5nc21laHJhdWZ3ZW5kdW4=?= =?UTF-8?B?Z2VuIGVpbmVzIFNlZW1hbm5z?= </code></pre> <p>text - encoded sting - text</p> <p>text - encoded string</p> <p>text - encoded string - encoded string</p> <p>Encodig could also be something else like ISO 8859-15.</p> <p>Update 1: I forgot to mention, I tried email.header.decode_header</p> <pre><code> for item in message.items(): if item[0] == 'Subject': sub = email.header.decode_header(item[1]) logging.debug( 'Subject is %s' % sub ) </code></pre> <p>This outputs</p> <blockquote> <p>DEBUG:root:Subject is [('[ 201101251025 ] ELStAM;=?UTF-8?B?IFZlcmbDvGd1bmcgdm9tIDIx?=. Januar 2011', None)]</p> </blockquote> <p>which does not really help.</p> <p>Update 2: Thanks to Ingmar Hupp in the comments.</p> <p>the first example decodes to a list of two tupels: </p> <blockquote> <blockquote> <blockquote> <blockquote> <p>print decode_header("""[ 201105161048 ] GewSt:=?UTF-8?B?IFdlZ2ZhbGwgZGVyIFZvcmzDpHVmaWdrZWl0?=""")<br> [('[ 201105161048 ] GewSt:', None), (' Wegfall der Vorl\xc3\xa4ufigkeit', 'utf-8')]</p> </blockquote> </blockquote> </blockquote> </blockquote> <p>is this always [(string, encoding),(string, encoding), ...] so I need a loop to concat all the [0] items to one string or how to get it all in one string? </p> <blockquote> <p>Subject: [ 201101251025 ] ELStAM;=?UTF-8?B?IFZlcmbDvGd1bmcgdm9tIDIx?=. Januar 2011</p> </blockquote> <p>does not decode well:</p> <blockquote> <p>print decode_header("""[ 201101251025 ] ELStAM;=?UTF-8?B?IFZlcmbDvGd1bmcgdm9tIDIx?=. Januar 2011""")</p> <p>[('[ 201101251025 ] ELStAM;=?UTF-8?B?IFZlcmbDvGd1bmcgdm9tIDIx?=. Januar 2011', None)]</p> </blockquote>
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