Using a Proxy to Call a REST Service

In some cases you will be stuck behind a firewall and thus unable to call a REST service directly. This document shows you how to configure your app to use a proxy to call such services.

Proxy Host and Proxy Port

There are two parameters that specify which proxy server to use when making REST calls: http.proxyHost and http.proxyPort. Some proxies require authentication, which you may specify as http.proxyUser and http.proxyPassword.

You can either specify these as custom settings or as JVM parameters (system properties).

Custom Settings

For details on specifying REST proxy settings as custom server setting, see Configuration.

JVM Parameters

Alternatively, you can specify JVM parameters in your .m2eerc under JVM parameters. This is useful if you want to use these settings to consume web services too.

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...
# custom java options, like -Xmx256m or -Djava.foo=bar
 javaopts: [ ..., "-Dhttp.proxyHost=myproxyserver.com", "-Dhttp.proxyPort=3128", "-Dhttp.proxyUser=myusername" "-Dhttp.proxyPassword=mypassword" ]
...

Or directly (when running locally from the Modeler or calling from Eclipse):

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-Dhttp.proxyHost=myproxyserver.com  -Dhttp.proxyPort=3128 -Dhttp.proxyUser=myusername -Dhttp.proxyPassword=mypassword

If specify a setting both as a custom setting and as a JVM parameter, the custom setting will be used.