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https://issues.apache.org/jira/browse/NETBEANS-96?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16239720#comment-16239720
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ASF GitHub Bot commented on NETBEANS-96:
----------------------------------------
lbruun commented on a change in pull request #161: [NETBEANS-96] New PAC Script
evaluation environment
URL: https://github.com/apache/incubator-netbeans/pull/161#discussion_r148970236
##########
File path:
core.network/src/org/netbeans/core/network/proxy/pac/PacHelperMethods.java
##########
@@ -0,0 +1,48 @@
+/*
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.netbeans.core.network.proxy.pac;
+
+
+
+/**
+ * Stub for PAC Helpers.
+ *
+ * <p>
+ * The 'Helpers' are utility functions that the PAC script can make use of.
+ *
+ * @author lbruun
+ */
+public abstract class PacHelperMethods implements PacHelperMethodsNetscape,
PacHelperMethodsMicrosoft {
+
+
+ /**
+ * Writes something to log or elsewhere. This allows the PAC script to do
+ * simple logging for debugging purpose. It overwrites the standard
+ * JavaScript {@code alert()} function.
+ *
+ * <p>
+ * Note that the JavaScript {@code alert()} function should not be used in
+ * a production PAC script. It is only intended for debugging and
+ * unit test purpose.
+ *
+ * <p>
+ * The default implementation simply writes to stderr.
+ *
+ * @param message text to log
+ */
+ public void alert(String message) {
+ System.err.println(message);
Review comment:
The `PacHelperMethods` is abstract. The actual implementation,
`NbPacHelperMethods`, now overrides this method and logs to logger with INFO
level.
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> New PAC Script evaluator
> ------------------------
>
> Key: NETBEANS-96
> URL: https://issues.apache.org/jira/browse/NETBEANS-96
> Project: NetBeans
> Issue Type: Improvement
> Reporter: lbruun
> Labels: pull-request-available
>
> The current [PAC script|https://en.wikipedia.org/wiki/Proxy_auto-config]
> evaluator (in {{core.network}}) was developed pre-Nashorn and has a few
> problems:
> * It simply fails with Nashorn - but not with Rhino - if the downloaded
> script uses {{isInNet()}}. This was reported in [Bug
> 245116|https://netbeans.org/bugzilla/show_bug.cgi?id=245116]. It fails
> silently in this case and defaults to no proxy. The user will never know the
> reason - not even by looking in the message log - that there was an error.
> * It doesn't implement two mandatory JavaScript helper methods,
> {{dnsResolve()}} and {{myIpAddress()}}. This is a known issue. This causes
> many PAC scripts to silently fail.
> * It doesn't implement Microsoft's IPv6-aware additions to the PAC standard.
> This is a problem in MS shops because they will have designed their PAC
> script to be compatible with MS IE and MS Edge (which unsurprisingly support
> these functions .. as do Chrome).
> * It uses a small JavaScript helper, {{nsProxyAutoConfig.js}}, which uses a
> license which is not compatible with Apache. This is described in NETBEANS-4.
> * Isn't executing the downloaded PAC script in a sandboxed environment. (The
> PAC script should be treated as hostile because the download may have been
> spoofed. Browsers indeed treat the PAC script as hostile and so should
> NetBeans).
> Pull Request with a new implementation is on its way.
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