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helper that checks if the given uri exists and is downloadable
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Supports http (via HEAD) and ftp (via size request)
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s init proxy settings
* first check for http_proxy environment (always wins),
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Check via dbus if the system is running on battery.
This function is using UPower per default, if UPower is not
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Send a dbus signal to power-manager to not suspend
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c C sq t j j d d } d | k r% d Sd | k r5 d Sd | k sM d | k rQ d Sd | k si d
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Convert a given size in bytes to a nicer better readable unit
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c C sv d } t j d k r$ t d n t j j d s: t St j d d g d t j j d } | | k rr t St
S( s# Return True if iptables is active s Chain INPUT (policy ACCEPT)
target prot opt source destination
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i s% Need root to check the iptables states /sbin/iptablest iptabless -LRR ( R t getuidt OSErrorR# RB R) RS RT RU RV R8 ( t iptables_emptyRJ ( ( s5 /usr/lib/python2.7/dist-packages/DistUpgrade/utils.pyt iptables_active s t __main__(7 R Rb R R> R R R t mathR R t init_configR R- R R t os.pathR" RS Rp R
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