Plugin does not use eclipse proxy settings

[parenko]

Describe the bug
I am getting following Exception that https://api.spring.io/projects could not be reached.
Direct connection is forbidden on my corporate machine.
Eclipse is configured to use Proxy, but STS4 does not use thise settings.

To Reproduce
Configure Eclipse to use Proxy.
(Disable direct access to the internet. Allow connection only over a proxy.)
Start Eclipse with STS4 Plugin.
After some time Spring Boot Language Server logs the problem.

Sample

15:44:24.843 [Project-Reconciler-1] ERROR o.s.i.v.b.v.g.ProjectVersionDiagnosticProvider - 
org.springframework.web.client.ResourceAccessException: I/O error on GET request for "https://api.spring.io/projects": Connection timed out: connect
	at org.springframework.web.client.RestTemplate.createResourceAccessException(RestTemplate.java:888)
	at org.springframework.web.client.RestTemplate.doExecute(RestTemplate.java:868)
	at org.springframework.web.client.RestTemplate.execute(RestTemplate.java:764)
	at org.springframework.web.client.RestTemplate.exchange(RestTemplate.java:646)
	at org.springframework.ide.vscode.boot.validation.generations.SpringProjectsClient.get(SpringProjectsClient.java:74)
	at org.springframework.ide.vscode.boot.validation.generations.SpringProjectsClient.fromEmbedded(SpringProjectsClient.java:53)
	at org.springframework.ide.vscode.boot.validation.generations.SpringProjectsClient.getSpringProjects(SpringProjectsClient.java:40)
	at org.springframework.ide.vscode.boot.validation.generations.SpringIoProjectsProvider.cache(SpringIoProjectsProvider.java:60)
	at org.springframework.ide.vscode.boot.validation.generations.SpringIoProjectsProvider.getProject(SpringIoProjectsProvider.java:54)
	at org.springframework.ide.vscode.boot.validation.generations.GenerationsValidator.validate(GenerationsValidator.java:57)
	at org.springframework.ide.vscode.boot.validation.generations.ProjectVersionDiagnosticProvider.getDiagnostics(ProjectVersionDiagnosticProvider.java:56)
	at org.springframework.ide.vscode.boot.validation.BootVersionValidationEngine.reconcile(BootVersionValidationEngine.java:50)
	at org.springframework.ide.vscode.boot.common.ProjectReconcileScheduler.lambda$scheduleValidation$0(ProjectReconcileScheduler.java:85)
	at java.base/java.util.Optional.ifPresent(Optional.java:178)
	at org.springframework.ide.vscode.boot.common.ProjectReconcileScheduler.lambda$scheduleValidation$1(ProjectReconcileScheduler.java:83)
	at reactor.core.publisher.MonoPeekTerminal$MonoTerminalPeekSubscriber.onNext(MonoPeekTerminal.java:171)
	at reactor.core.publisher.FluxOnAssembly$OnAssemblySubscriber.onNext(FluxOnAssembly.java:539)
	at reactor.core.publisher.MonoPublishOn$PublishOnSubscriber.run(MonoPublishOn.java:181)
	at reactor.core.scheduler.SchedulerTask.call(SchedulerTask.java:68)
	at reactor.core.scheduler.SchedulerTask.call(SchedulerTask.java:28)
	at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
	at java.base/java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:304)
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
	at java.base/java.lang.Thread.run(Thread.java:833)
Caused by: java.net.ConnectException: Connection timed out: connect
	at java.base/sun.nio.ch.Net.connect0(Native Method)
	at java.base/sun.nio.ch.Net.connect(Net.java:579)
	at java.base/sun.nio.ch.Net.connect(Net.java:568)
	at java.base/sun.nio.ch.NioSocketImpl.connect(NioSocketImpl.java:593)
	at java.base/java.net.SocksSocketImpl.connect(SocksSocketImpl.java:327)
	at java.base/java.net.Socket.connect(Socket.java:633)
	at java.base/sun.security.ssl.SSLSocketImpl.connect(SSLSocketImpl.java:304)
	at java.base/sun.security.ssl.BaseSSLSocketImpl.connect(BaseSSLSocketImpl.java:174)
	at java.base/sun.net.NetworkClient.doConnect(NetworkClient.java:183)
	at java.base/sun.net.www.http.HttpClient.openServer(HttpClient.java:533)
	at java.base/sun.net.www.http.HttpClient.openServer(HttpClient.java:638)
	at java.base/sun.net.www.protocol.https.HttpsClient.<init>(HttpsClient.java:266)
	at java.base/sun.net.www.protocol.https.HttpsClient.New(HttpsClient.java:380)
	at java.base/sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.getNewHttpClient(AbstractDelegateHttpsURLConnection.java:193)
	at java.base/sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1242)
	at java.base/sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1128)
	at java.base/sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(AbstractDelegateHttpsURLConnection.java:179)
	at java.base/sun.net.www.protocol.https.HttpsURLConnectionImpl.connect(HttpsURLConnectionImpl.java:142)
	at org.springframework.http.client.SimpleBufferingClientHttpRequest.executeInternal(SimpleBufferingClientHttpRequest.java:75)
	at org.springframework.http.client.AbstractBufferingClientHttpRequest.executeInternal(AbstractBufferingClientHttpRequest.java:48)
	at org.springframework.http.client.AbstractClientHttpRequest.execute(AbstractClientHttpRequest.java:66)
	at org.springframework.web.client.RestTemplate.doExecute(RestTemplate.java:862)
	... 23 common frames omitted

[BoykoAlex]

@parenko what kind of a proxy is it? Does it require authentication? I suspect that everything requiring authentication would be problematic... username/password in VSCode is stored somewhere in electron proxy auth which i have no idea how to get to yet. Furthermore, looks like VSCode asks for username/password on demand which may happen later than Spring Boot LS first reconciling cycle...
Anyway, I think I can support username/password auth for the Eclipse case for now... I'd probably push this right after 4.20 release to try this out for you in a snapshot build. What do you think?

@martinlippert I had to add okhttp to support authenticated proxy case. Wonder if it is okay... or perhaps just support proxies not requiring authentication to simplify things for now?

[parenko]

@BoykoAlex our proxy requires authentication.
I would support you and try a snapshot :)

[BoykoAlex]

Cool, a 4.20.1 snapshot next week then.

[BoykoAlex]

@parenko Lets give the fix d7ae292 a try. Please have look at the snapshot build page and pick either a distro build or an update site: https://dist.springsource.com/snapshot/STS4/nightly-distributions.html

Eclipse STS4 should have proxy support with authentication, VSCode without the authentication