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annotate roundup/cgi/timestamp.py @ 6546:c58c7cd31243

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issue2550991 - Some mechanism to set expiration header or max age for static resources Work was done in 2.0.0 to add support for cache control headers. This checkin sets default values for javascript (2 weeks) and css (2 month) files.
author John Rouillard <rouilj@ieee.org>
date Thu, 09 Dec 2021 17:36:08 -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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10
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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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14
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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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