bug: On applying any ext-plugin-post-resp, any header set by upstream service was not passed to downstream

[abhi0476]

If we apply any ext-plugin-post-resp filter any header set by upstream service was not passed to downstream.

Also There is no provision for setting multiple headers as headers is made as private Map<String, String> headers; instead it should be private Map<String, List> headers in PostResponse.java and PostRequest.java

Environment

• apisix-runner-starter 0.4.0

Minimal test code / Steps to reproduce the issue

1. Apply any developed filter on ext-plugin-post-resp
2. Set some header say cookie on upstream server
3. Check response on httpclient, upstream headers has been ommitted

What's the actual result? (including assertion message & call stack if applicable)

Headers is not available on downstream

What's the expected result?

Headers should be available on downstream

Attaching a fix for the same
apisix.zip

[Sn0rt]

thx you very much. and can you create a PR ?

[abhi0476]

thx you very much. and can you create a PR ?
How to do that? In which branch should I commit and push first?

[juzhiyuan]

Hi @abhi0476,

1. You need to click fork at https://github.com/apache/apisix-java-plugin-runner
2. Commit changes to the main branch
3. Submit a PR

[abhi0476]

Hi @abhi0476,

1. You need to click fork at https://github.com/apache/apisix-java-plugin-runner
2. Commit changes to the main branch
3. Submit a PR

Done