[Bug]: HTTP client transform fails in case of proxy

[enricomariam42]

Apache Hop version?

2.6.0

Java version?

java.version=11.0.9.1

Operating system

Linux

What happened?

Using HTTP client transform through an http proxy results in a "Server Hangup" response (502)
Disabling preemptive authentication by editing the code and transform works.

Issue Priority

Priority: 3

Issue Component

Component: Transforms

[marcushenningsen]

Is there any solution to this? I'm not sure what is meant by "Disabling preemptive authentication".

[hansva]

Could you try one of our latest builds. Could be solved by #4195

You can fetch a current build here these do require Java 17

[marcushenningsen]

I just tried the latest snapshot, but the problem persists.

[hansva]

Ok this post explains preemptive vs non-preemptive authentication.

https://stackoverflow.com/questions/7482523/why-preemptive-authentication

The solution will be to add a checkbox to enable/disable that feature flag.

[hansva]

To be clear, which lines did you disable to get it working?
Because I see code labeled as Preemtive authentication:

hop/plugins/transforms/http/src/main/java/org/apache/hop/pipeline/transforms/http/Http.java

Lines 154 to 158 in 5e0ecaa

	// Preemptive authentication
	HttpHost target = new HttpHost(uri.getHost(), uri.getPort(), uri.getScheme());
	if (StringUtils.isNotBlank(data.realProxyHost)) {
	target = new HttpHost(data.realProxyHost, data.realProxyPort, "http");
	}

But disabling that is the same as removing the proxy