SCDF fail to download application starters behind corporate proxy

[slobodanl]

Description: SCDF fail to download application starters behind a corporate proxy ( no proxy authentication )

Release versions: SCDF 2.9.2

Steps to reproduce: Add Applications > Stream application starters for RabbitMQ/Maven > Import Applications

Additional context: Stack trace dataflow-server | java.lang.RuntimeException: Error reading from URL [https://dataflow.spring.io/rabbitmq-maven-latest] dataflow-server | at org.springframework.cloud.dataflow.registry.service.DefaultAppRegistryService.resourceAsLines(DefaultAppRegistryService.java:447) dataflow-server | at java.base/java.util.stream.ReferencePipeline$7$1.accept(Unknown Source) dataflow-server | Caused by: java.net.SocketException: Network is unreachable (connect failed) dataflow-server | at java.base/java.net.PlainSocketImpl.socketConnect(Native Method) dataflow-server | at java.base/java.net.AbstractPlainSocketImpl.doConnect(Unknown Source) dataflow-server | at java.base/java.net.AbstractPlainSocketImpl.connectToAddress(Unknown Source) dataflow-server | at java.base/java.net.AbstractPlainSocketImpl.connect(Unknown Source) dataflow-server | at java.base/java.net.SocksSocketImpl.connect(Unknown Source) dataflow-server | at java.base/java.net.Socket.connect(Unknown Source)

[markpollack]

Aside from asking your administrator to open up access to that web site, you can host all the apps locally inside your firewall by using this tool. https://github.com/dturanski/scdf-app-tool

[markpollack]

You can also download that list of apps from outside the firewall and then host that file inside your firewall.

[markpollack]

We can investigate if the data flow server can be configured to use a proxy server.