bugfix for [#23737] reported by Mariusz Maximus

netrender client's functions to get slaves and jobs info didn't work anymore (was reading response content twice).

At the same time, I switched to json for the dump and load, instead of using eval and repr (for obvious security reasons). I should have done this much earlier.

release/scripts/io/netrender/operators.py

@@ -20,6 +20,7 @@ import bpy
 import sys, os
 import http, http.client, http.server, urllib, socket
 import webbrowser
+import json
 
 import netrender
 from netrender.utils import *
@@ -205,10 +206,10 @@ class RENDER_OT_netclientstatus(bpy.types.Operator):
             conn.request("GET", "/status")
 
             response = conn.getresponse()
-            response.read()
+            content = response.read()
             print( response.status, response.reason )
 
-            jobs = (netrender.model.RenderJob.materialize(j) for j in eval(str(response.read(), encoding='utf8')))
+            jobs = (netrender.model.RenderJob.materialize(j) for j in json.loads(str(content, encoding='utf8')))
 
             while(len(netsettings.jobs) > 0):
                 netsettings.jobs.remove(0)
@@ -307,10 +308,10 @@ class RENDER_OT_netclientslaves(bpy.types.Operator):
             conn.request("GET", "/slaves")
 
             response = conn.getresponse()
-            response.read()
+            content = response.read()
             print( response.status, response.reason )
 
-            slaves = (netrender.model.RenderSlave.materialize(s) for s in eval(str(response.read(), encoding='utf8')))
+            slaves = (netrender.model.RenderSlave.materialize(s) for s in json.loads(str(content, encoding='utf8')))
 
             while(len(netsettings.slaves) > 0):
                 netsettings.slaves.remove(0)