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from __future__ import print_function
import sys
import Pyro4
if sys.version_info < (3, 0):
input = raw_input
uri = input("enter attribute server object uri: ").strip()
with Pyro4.Proxy(uri) as p:
# Direct remote attribute access.
print("\nDirect attribute access:")
print("p.prop_value=", p.prop_value)
print("adding 500 to p.prop_value")
p.prop_value += 500
print("p.prop_value=", p.prop_value)
print("actual remote value: ", p.getValue(), " (via p.getValue() remote method call)")
if p.prop_value != p.getValue():
# they differ!? (should not happen)
print("Remote value is different! The p.prop_value attribute must be a local one (not remote), this should not happen! (because metadata is enabled here)")
print()
# dunder names
print("calling p.__dunder__()....: ", p.__dunder__())
with Pyro4.Proxy(uri) as p:
# unexposed attributes
print("\nAccessing unexposed attributes:")
try:
print("accessing p.sub...")
_ = p.sub
raise RuntimeError("this should not be possible!") # because p.sub is not an exposed property
except AttributeError as x:
print("ok, got expected error:", x)
try:
print("accessing p.value...")
_ = p.value
raise RuntimeError("this should not be possible!") # because p.value is not an exposed property
except AttributeError as x:
print("ok, got expected error:", x)
try:
print("accessing p._value...")
_ = p._value
raise RuntimeError("this should not be possible!") # because p._value is private
except AttributeError as x:
print("ok, got expected error:", x)
try:
print("accessing p.__value...")
_ = p.__value
raise RuntimeError("this should not be possible!") # because p.__value is private
except AttributeError as x:
print("ok, got expected error:", x)
with Pyro4.Proxy(uri) as p:
# Dotted name traversal is not supported by Pyro because that is a security vulnerability.
# What will happen instead is that the first part of the name will be evaluated and returned,
# and that the rest of the expression will be evaluated on the local object instead of
# directly on the remote one.
print("\nTrying dotted name traversal:")
value = p.prop_sub
print("value gotten from p.prop_sub=", value)
print("\nTrying to update the dictionary directly on the remote object...")
p.prop_sub.update({"test": "nope"}) # this will only update the local copy!
new_value = p.prop_sub
print("value gotten from p.prop_sub=", new_value, " (should be unchanged!)")
assert new_value == value, "update should not have been done remotely"
try:
print("\nTrying longer dotted name: p.prop_sub.foobar.attribute")
_ = p.prop_sub.foobar.attribute
raise RuntimeError("this should not be possible!")
except Exception as x:
remote_tb = getattr(x, "_pyroTraceback", None)
if remote_tb:
raise RuntimeError("We got a remote traceback but this should have been a local one only")
print("ok, got expected error (local only):", x)
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