Class: Karst::Web::Locality

Inherits:
Object
  • Object
show all
Defined in:
lib/karst/web/locality.rb

Overview

Determines whether a Rack peer is local without consulting proxy headers. WSL's NAT makes a Windows browser appear as the Linux VM's default gateway, so that one address is accepted when the process is verifiably running in WSL. Other private-network peers remain untrusted.

Instance Method Summary collapse

Constructor Details

#initialize(environment: ENV, osrelease_path: "/proc/sys/kernel/osrelease", route_path: "/proc/net/route") ⇒ Locality

Returns a new instance of Locality.



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# File 'lib/karst/web/locality.rb', line 15

def initialize(environment: ENV, osrelease_path: "/proc/sys/kernel/osrelease", route_path: "/proc/net/route")
  @environment = environment
  @osrelease_path = osrelease_path
  @route_path = route_path
end

Instance Method Details

#local?(remote_address) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/karst/web/locality.rb', line 21

def local?(remote_address)
  address = IPAddr.new(remote_address.to_s)
  loopback?(address) || wsl_gateway == address
rescue IPAddr::Error
  false
end