forked from BrowserSecurity/ExtensionCrawler
49 lines
1.4 KiB
Python
49 lines
1.4 KiB
Python
#!/usr/bin/env python3
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#
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# Copyright (C) 2016,2017 The University of Sheffield, UK
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <https://www.gnu.org/licenses/>.
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#
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""" Various utility methods."""
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import sys
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from time import sleep
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from random import random
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def google_dos_protection(maxrange=0.3):
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"""Wait a random number of seconds (between 0.5 to 0.5+maxrange)
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to avoid Google's bot detection"""
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sleep(0.5+(random()*maxrange))
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def log(verbose, msg):
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"""Print log message."""
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if verbose:
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sys.stdout.write(msg)
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sys.stdout.flush()
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def logmsg(verbose, msg1, msg2):
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"""Append msg2 to log stream msg1."""
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if verbose:
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return msg1 + msg2
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else:
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return msg1
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def value_of(value, default):
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"""Get value or default value if None."""
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if value is not None and value is not "":
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return value
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else:
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return default
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