Mercurial > p > roundup > code
annotate detectors/emailauditor.py @ 6565:2c2dbfc332ba
Try to handle multiple connections better.
The session database is a hot spot. When multiple requests (e.g. 20)
come in at the same time session database contention can get great.
The original code didn't retry session database access when the open
failed. This resulted in errors at the client.
The second pass delayed 0.01 seconds and retried. It was better but we
still had multiple second stalls. I think the first request got in,
everybody else backed up and then retried at the same time. Again they
stepped on each other. With logging I would see many counters go all
the way to low single digits or to -1 indicating falure.
This pass uses randomint to generate delays from 0-.125 seconds in 5ms
increments. This performs better in testing. I rarely saw a counter
less than 13 (2 failed retries). Current logging starts after 6
failures and counts down until success or failure.
| author | John Rouillard <rouilj@ieee.org> |
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| date | Thu, 16 Dec 2021 20:02:00 -0500 |
| parents | 0942fe89e82e |
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| rev | line source |
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1 |
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2 def eml_to_mht(db, cl, nodeid, newvalues): |
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3 '''This auditor fires whenever a new file entity is created. |
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4 |
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5 If the file is of type message/rfc822, we tack onthe extension .eml. |
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6 |
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7 The reason for this is that Microsoft Internet Explorer will not open |
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8 things with a .eml attachment, as they deem it 'unsafe'. Worse yet, |
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9 they'll just give you an incomprehensible error message. For more |
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10 information, please see: |
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11 |
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12 http://support.microsoft.com/default.aspx?scid=kb;EN-US;825803 |
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13 |
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14 Their suggested work around is (excerpt): |
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15 |
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16 WORKAROUND |
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18 To work around this behavior, rename the .EML file that the URL |
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19 links to so that it has a .MHT file name extension, and then update |
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20 the URL to reflect the change to the file name. To do this: |
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21 |
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22 1. In Windows Explorer, locate and then select the .EML file that |
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23 the URL links. |
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24 2. Right-click the .EML file, and then click Rename. |
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25 3. Change the file name so that the .EML file uses a .MHT file name |
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26 extension, and then press ENTER. |
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27 4. Updated the URL that links to the file to reflect the new file |
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28 name extension. |
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29 |
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30 So... we do that. :)''' |
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31 if newvalues.get('type', '').lower() == "message/rfc822": |
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32 if 'name' not in newvalues: |
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33 newvalues['name'] = 'email.mht' |
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34 return |
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35 name = newvalues['name'] |
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36 if name.endswith('.eml'): |
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37 name = name[:-4] |
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38 newvalues['name'] = name + '.mht' |
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39 |
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40 def init(db): |
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41 db.file.audit('create', eml_to_mht) |
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42 |
