erp5_json_rpc_api: ensure error handling does not leak the internal stack

master/bt5/erp5_json_rpc_api/SkinTemplateItem/portal_skins/erp5_json_rpc_api/JSONRPCService_handleException.py

+import json
+
+# Ensure default/unhandled result does not leak any internal information
+# about the execution stack
+exception_info = {
+  'type': 'unknown-error',
+  'title': 'Unknown Error'
+}
+status = 500
+response = request.response
+response.setHeader("Content-Type", "application/json")
+response.setStatus(status, lock=True)
+response.setBody(json.dumps(exception_info).encode(), lock=True)
+return

master/bt5/erp5_json_rpc_api/SkinTemplateItem/portal_skins/erp5_json_rpc_api/JSONRPCService_handleException.xml

+<?xml version="1.0"?>
+<ZopeData>
+  <record id="1" aka="AAAAAAAAAAE=">
+    <pickle>
+      <global name="PythonScript" module="Products.PythonScripts.PythonScript"/>
+    </pickle>
+    <pickle>
+      <dictionary>
+        <item>
+            <key> <string>_bind_names</string> </key>
+            <value>
+              <object>
+                <klass>
+                  <global name="_reconstructor" module="copy_reg"/>
+                </klass>
+                <tuple>
+                  <global name="NameAssignments" module="Shared.DC.Scripts.Bindings"/>
+                  <global name="object" module="__builtin__"/>
+                  <none/>
+                </tuple>
+                <state>
+                  <dictionary>
+                    <item>
+                        <key> <string>_asgns</string> </key>
+                        <value>
+                          <dictionary>
+                            <item>
+                                <key> <string>name_container</string> </key>
+                                <value> <string>container</string> </value>
+                            </item>
+                            <item>
+                                <key> <string>name_context</string> </key>
+                                <value> <string>context</string> </value>
+                            </item>
+                            <item>
+                                <key> <string>name_m_self</string> </key>
+                                <value> <string>script</string> </value>
+                            </item>
+                            <item>
+                                <key> <string>name_subpath</string> </key>
+                                <value> <string>traverse_subpath</string> </value>
+                            </item>
+                          </dictionary>
+                        </value>
+                    </item>
+                  </dictionary>
+                </state>
+              </object>
+            </value>
+        </item>
+        <item>
+            <key> <string>_params</string> </key>
+            <value> <string>exception, request</string> </value>
+        </item>
+        <item>
+            <key> <string>id</string> </key>
+            <value> <string>JSONRPCService_handleException</string> </value>
+        </item>
+      </dictionary>
+    </pickle>
+  </record>
+</ZopeData>