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[jetty-users] Fwd: Re: Forwarding virtual host requests to another server
[Apologies to Chris; I just realised that I replied to him directly instead of to the list...] 

On 08/11/2017 20:47, Chris Walker wrote:

John,
You could look into accomplishing this with the MovedContextHandler <https://www.eclipse.org/jetty/documentation/current/moved-context-handler.html> (Javadoc here <https://www.eclipse.org/jetty/javadoc/9.4.7.v20170914/org/eclipse/jetty/server/handler/MovedContextHandler.html>) or making use of the ProxyServlet <https://www.eclipse.org/jetty/documentation/current/proxy-servlet.html>. 

Hi Chris,
I've been trying to get a ProxyServlet to work. What I have done so far:
1) in the webapps directory, I've created a "proxy" directory containing an index.html, and a proxy.xml as follows: 

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE Configure PUBLIC "-//Jetty//Configure//EN" "http://www.eclipse.org/jetty/configure_9_3.dtd";> 

<Configure class="org.eclipse.jetty.webapp.WebAppContext">
  <Set name="contextPath">/</Set>
  <Set name="war"><Property name="jetty.webapps" default="."/>/proxy</Set>
  <Set name="virtualHosts">
    <Array type="java.lang.String">
      <Item>127.0.0.2</Item>
    </Array>
  </Set>
</Configure>
If I go to 127.0.0.1, I get my main webapp (which has 127.0.0.1 in its virtualHosts entry), and if I go to 127.0.0.2, I get my new index.html. So far so good.
2) I've created a simple ProxyServlet, compiled it successsfully, and am ready to test further. At this point I get lost in a maze of twisty little Jetty configuration problems.
2a) I get a startup error: "ProxyServlet not found." Oops, forgot to add the "proxy" module to my start.ini.
2b) Having added --module=proxy to my start.ini (using --add-to-start=proxy), I now get a different startup error: 

2017-11-15 14:49:19.678:WARN:oejx.XmlConfiguration:main:
java.lang.NoClassDefFoundError: org/eclipse/jetty/server/handler/HandlerWrapper 

and also

2017-11-15 14:51:44.242:WARN:oejx.XmlConfiguration:main:
java.lang.NoClassDefFoundError: org/eclipse/jetty/util/Attributes
And then the server terminates. I've tried everything I can think of but can't figure out what I need to do to fix this. If I take out --module=proxy from start.ini, the server keeps running and I can access my main webapp, but then I'm back to 2(a) again. 

This is what --list-config tells me:

Jetty Server Classpath:
-----------------------
Version Information on 13 entries in the classpath.
Note: order presented here is how they would appear on the classpath.
changes to the --module=name command line options will be reflected here. 0: 9.4.6.v20170531 | ${jetty.base}\lib\jetty-client-9.4.6.v20170531.jar 
 1:                    3.1.0 | ${jetty.base}\lib\servlet-api-3.1.jar
 2:                 3.1.0.M0 | ${jetty.base}\lib\jetty-schemas-3.1.jar
3: 9.4.6.v20170531 | ${jetty.base}\lib\jetty-http-9.4.6.v20170531.jar 4: 9.4.6.v20170531 | ${jetty.base}\lib\jetty-server-9.4.6.v20170531.jar 5: 9.4.6.v20170531 | ${jetty.base}\lib\jetty-xml-9.4.6.v20170531.jar 6: 9.4.6.v20170531 | ${jetty.base}\lib\jetty-util-9.4.6.v20170531.jar 7: 9.4.6.v20170531 | ${jetty.base}\lib\jetty-io-9.4.6.v20170531.jar 8: 9.4.6.v20170531 | ${jetty.base}\lib\jetty-security-9.4.6.v20170531.jar 9: 9.4.6.v20170531 | ${jetty.base}\lib\jetty-servlet-9.4.6.v20170531.jar 10: 9.4.6.v20170531 | ${jetty.base}\lib\jetty-webapp-9.4.6.v20170531.jar 11: 9.4.6.v20170531 | ${jetty.base}\lib\jetty-deploy-9.4.6.v20170531.jar 12: 9.4.6.v20170531 | ${jetty.base}\lib\jetty-proxy-9.4.6.v20170531.jar 

Jetty Active XMLs:
------------------
 ${jetty.base}\etc\console-capture.xml
 ${jetty.base}\etc\jetty.xml
 ${jetty.base}\etc\jetty-webapp.xml
 ${jetty.base}\etc\jetty-deploy.xml
 ${jetty.base}\etc\jetty-ssl.xml
 ${jetty.base}\etc\jetty-ssl-context.xml
 ${jetty.base}\etc\jetty-https.xml
 ${jetty.base}\etc\jetty-proxy.xml
 ${jetty.base}\etc\jetty-requestlog.xml
jetty-util-9.4.6.v20170531 (for Attributes) and jetty-server-9.4.6.v20170531 (for HandlerWrapper) are both in the lib directory. I've also added them to the Eclipse build path but that doesn't make any difference either. They don't appear in the server classpath for some reason. 

Any advice please?
--
John English

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