On Sat, 18 Sept 2021 at 03:13, <[email protected]> wrote:
>
> This is an automated email from the ASF dual-hosted git repository.
>
> humbedooh pushed a commit to branch master
> in repository https://gitbox.apache.org/repos/asf/incubator-ponymail-foal.git
>
>
> The following commit(s) were added to refs/heads/master by this push:
>      new df57669  Try to locate a better date for the From line.
> df57669 is described below
>
> commit df57669628d5287b854e20ed7245a46fd101af1a
> Author: Daniel Gruno <[email protected]>
> AuthorDate: Fri Sep 17 21:13:03 2021 -0500
>
>     Try to locate a better date for the From line.
>
>     This could probably get molded into an external function, but for now it 
> is only needed here.
> ---
>  server/endpoints/mbox.py | 14 +++++++++++++-
>  1 file changed, 13 insertions(+), 1 deletion(-)
>
> diff --git a/server/endpoints/mbox.py b/server/endpoints/mbox.py
> index 59cfc01..ec67eae 100644
> --- a/server/endpoints/mbox.py
> +++ b/server/endpoints/mbox.py
> @@ -26,6 +26,9 @@ import typing
>  import aiohttp.web
>  import asyncio.exceptions
>  import time
> +import email.utils
> +import datetime
> +import dateutil.tz
>
>
>  async def convert_source(session: plugins.session.SessionObject, email: 
> dict):
> @@ -34,7 +37,16 @@ async def convert_source(session: 
> plugins.session.SessionObject, email: dict):
>          source_as_text = source["_source"]["source"]
>          # Ensure it starts with "From "...or fake it
>          if not source_as_text.startswith("From "):
> -            from_line = "From MAILER-DAEMON %s\n" % time.strftime("%a %b %d 
> %H:%M:%S %Y")
> +            from_line = "From MAILER-DAEMON %s\n" % time.strftime("%a %b %d 
> %H:%M:%S %Y", time.gmtime(0))  # Fallback in case no date found
> +            # If we have any Received: headers, we can extrapolate an 
> approximate time from the last (top) one.
> +            from_match = re.search(r"(?:[\r\n]|^)Received:\s+from[^;]+?; 
> (.+?)[\r\n]", source_as_text)
> +            if from_match:
> +                recv_time = email.utils.parsedate_tz(from_match.group(1))
> +                if recv_time:
> +                    dt_tuple = datetime.datetime(*recv_time[:7])
> +                    if recv_time[9]:  # If we have an offset, set timezone
> +                        dt_tuple = 
> dt_tuple.replace(tzinfo=dateutil.tz.tzoffset("Offset", recv_time[9]))
> +                    from_line = "From MAILER-DAEMON %s\n" % 
> dt_tuple.strftime("%a %b %d %H:%M:%S %Y %z")

-1
Conversion to a From_ line timestamp c/should use a standard function,
which can then be tested separately.
Or at least use a shared constant.
Doing either of those might have avoided the bug in the above line.

>              source_as_text = from_line + source_as_text
>          # Convert to mboxrd format
>          mboxrd_source = ""

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