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annotate roundup/cgi/timestamp.py @ 6610:db3f0ba75b4a

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Change checkpoint_data and restore_connection_on_error to subtransaction checkpoint_data and restore_connection_on_error used to commit() and rollback() the db connection. This causes additional I/O and load. Changed them to use 'SAVEPOINT name' and 'ROLLBACK TO name' to get a faster method for handling errors within a tranaction. One thing to note is that postgresql (unlike SQL std) doesn't overwrite an older savepoint with he same name. It keeps all savepoints but only rolls back to the newest one with a given name. This could be a resource issue. I left a commented out release statement in case somebody runs into an issue due to too many savepoints. I expect it to slow down the import but....
author John Rouillard <rouilj@ieee.org>
date Sat, 29 Jan 2022 11:29:36 -0500
parents 5ec3171580a6
children 07ce4e4110f5
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 '''Set of functions of adding/checking timestamp to be used to limit
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2 form submission for cgi actions.
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3 '''
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4
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5 import time, struct, binascii, base64
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6 from roundup.cgi.exceptions import FormError
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7 from roundup.i18n import _
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8 from roundup.anypy.strings import b2s, s2b
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9
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11 def pack_timestamp():
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12 return b2s(base64.b64encode(struct.pack("i", int(time.time()))).strip())
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13
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15 def unpack_timestamp(s):
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16 try:
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17 timestamp = struct.unpack("i", base64.b64decode(s2b(s)))[0]
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18 except (struct.error, binascii.Error, TypeError):
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19 raise FormError(_("Form is corrupted."))
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20 return timestamp
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21
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22
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23 class Timestamped:
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24 def timecheck(self, field, delay):
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25 try:
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26 created = unpack_timestamp(self.form[field].value)
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27 except KeyError:
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28 raise FormError(_("Form is corrupted, missing: %s." % field))
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29 if time.time() - created < delay:
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30 raise FormError(_("Responding to form too quickly."))
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31 return True
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