How to Resolve \"Proxy Authentication Required\" Errors in Gradle Proxy Configuration?

Gradle Proxy Configuration: Overcoming Proxy Authentication Errors

When leveraging Gradle with Jenkins for Gradle/Artifactory integration, network access through a proxy server may be necessary. Configuring this proxy to avoid potential issues involves adding the Artifactory plugin and defining proxy settings in .gradle/gradle.properties.

However, when faced with a 407 HTTP response code indicating "Proxy authentication required," despite specifying a proxy and its authentication credentials, further troubleshooting is needed.

Adjusted Proxy Configuration

To address this issue, consider the following adjustments to your Gradle proxy configuration:

• HTTP/HTTPS Separation: If the error relates to an HTTP proxy, specify http.proxyHost and http.proxyPort. Conversely, for an HTTPS proxy, use https.proxyHost and https.proxyPort. For both, set -Dhttp.nonProxyHosts=*.nonproxyrepos.com|localhost.
• Proxy Credentials: To provide proxy authentication credentials, supply -Dhttps.proxyUser=user and -Dhttps.proxyPassword=pass (replace with actual values). Similar properties (http.proxyUser and http.proxyPassword) exist for HTTP proxies.
• Authentication Failure: Ensure that the specified proxy user credentials are valid and distinct from the user logged into the machine.

Supplementary Options

In addition to these configurations, the following may prove beneficial:

• Place proxy settings in either the homedir or project dir gradle.properties file.
• Consider using gradle-wrapper.properties for persistent proxy configuration.

Conclusion

By implementing these revised proxy configurations and attending to the authentication considerations, it is possible to resolve proxy-related issues and establish successful web access from Gradle for use with Jenkins and Artifactory.

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