[Email-SIG] fixing the current email module

[Barry Warsaw]

On Oct 8, 2009, at 11:09 AM, Stephen J. Turnbull wrote:

> Barry Warsaw writes:
>
>>>>> from email import message_from_string
>>>>> with open('/dev/urandom') as wire:
>> ...   data = wire.read(1024)
>> ...
>
> # insert A
>
>>>>> msg = message_from_string(data)
>>>>> # number of headers
>> ... len(msg)
>> 0
>>>>> len(msg.get_payload())
>> 1024
>>>>> msg.defects
>> []
>>
>> This actually makes perfect sense.  A message with no headers and a
>> mass of 1024 bytes in its payload is RFC valid!
>
> If you insert at A
>
>>>> wire = "".join(chr(ord(ch) & 127) for ch in wire)
>>>> # optional with reasonably high probability:
>>>> wire = wire[0:512] + "\r\n" + wire[512:1024]
>
> or similar.  Otherwise not. ;-)

Right!  That makes it legal.

What's interesting of course is that the parser can (and I submit,  
still should) handle the stream even without that.

-Barry


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