/usr/lib/ruby/vendor_ruby/web_console/session.rb is in ruby-web-console 2.2.1-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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# A session lets you persist wrap an +Evaluator+ instance in memory
# associated with multiple bindings.
#
# Each newly created session is persisted into memory and you can find it
# later its +id+.
#
# A session may be associated with multiple bindings. This is used by the
# error pages only, as currently, this is the only client that needs to do
# that.
class Session
cattr_reader :inmemory_storage
@@inmemory_storage = {}
class << self
# Finds a persisted session in memory by its id.
#
# Returns a persisted session if found in memory.
# Raises NotFound error unless found in memory.
def find(id)
inmemory_storage[id]
end
# Create a Session from an exception.
def from_exception(exc)
new(exc.bindings)
end
# Create a Session from a single binding.
def from_binding(binding)
new(binding)
end
end
# An unique identifier for every REPL.
attr_reader :id
def initialize(bindings)
@id = SecureRandom.hex(16)
@bindings = Array(bindings)
@evaluator = Evaluator.new(@bindings[0])
store_into_memory
end
# Evaluate +input+ on the current Evaluator associated binding.
#
# Returns a string of the Evaluator output.
def eval(input)
@evaluator.eval(input)
end
# Switches the current binding to the one at specified +index+.
#
# Returns nothing.
def switch_binding_to(index)
@evaluator = Evaluator.new(@bindings[index.to_i])
end
private
def store_into_memory
inmemory_storage[id] = self
end
end
end
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