java - How to configure a proxy server for both HTTP and HTTPS in Maven's settings.xml?

Question

I'm using Maven 3.1.1 behind a proxy server. The same proxy handles both HTTP and HTTPS traffic.

I can't seem to tell maven using settings.xml to use both protocols. It seems to me that it is only possible to have one active proxy, as whichever active proxy is defined first is used, and subsequent 'active' proxy definitions are ignored. This is my settings.xml:

<proxies>
    <proxy>
        <id>myhttpproxy</id>
        <active>true</active>
        <protocol>http</protocol>
        <host>192.168.1.2</host>
        <port>3128</port>
        <nonProxyHosts>localhost</nonProxyHosts>
    </proxy>
    <proxy>
        <id>myhttpsproxy</id>
        <active>true</active>
        <protocol>https</protocol>
        <host>192.168.1.2</host>
        <port>3128</port>
        <nonProxyHosts>localhost</nonProxyHosts>
    </proxy>
</proxies>

Is it possible to configure a proxy for both HTTP and HTTPS in maven's settings.xml? I'm aware that I could workaround this by passing Java system properties to the maven invocation such as:

-Dhttps.proxyHost=192.168.1.2 -Dhttps.proxyPort=3128

but surely this must be possible from within settings.xml?

Maven bugs raised such as MNG-2305 and MNG-4394 suggest this issue is resolved, but I am not convinced.

Alternatively, is there a "proxy proxy" I could run locally that I could point maven to? The "proxy proxy" would route http/https accordingly. Even so, I would still need to define two active proxy definitions in settings.xml for Maven to direct both types of traffic.

Answer 1

Maven proxy from settings.xml is used for both http and https, so you just need to define one proxy server and it will be used for both, you just need to leave only one proxy tag, like this:

<proxies>
    <proxy>
        <id>myhttpproxy</id>
        <active>true</active>
        <protocol>http</protocol>
        <host>192.168.1.2</host>
        <port>3128</port>
        <nonProxyHosts>localhost</nonProxyHosts>
    </proxy>
</proxies>

The protocol above is the protocol of the proxy server, not the proxied request.