[GitHub] [apisix] zhlu001 opened a new issue, #8472: help request: How to dynamic add/remove headers in "ext-plugin" with Java Runner

[GitBox <gi...@apache.org>]

zhlu001 opened a new issue, #8472:
URL: https://github.com/apache/apisix/issues/8472

   ### Description
   
   Is it possible to dynamic to add headers in the ext-plugin (We implement a java based plugin with "apisix-runner-starter, 0.4.0" )?
   the methods we tried this method: 
   ` public void filter(HttpRequest request, HttpResponse response, PluginFilterChain chain `
   ...
   `   request.getHeaders().put("abc","abc");
           request.getHeaders().put("567","565");`
   ...
   
   Expectation: 
   upstream api receives the combined headers (original + dynamic).    
   client 10 headers --> apisix ext-plugin(java runner) add 2 headers=> 12 headers -> upstream, 12 headers 
   
   Actual 
   upstream api still receives the original headers 
   client 10 headers --> apisix ext-plugin(java runner) add 2 headers=> 12 headers -> upstream, 10 headers 
   
   We noticed that line 223 in the "RpcCallHandler" in the "org.apache.apisix.plugin.runner.handler" ;package
   still using the original request, even the ext-plugin add or remove the header
   
   Typically, data transmission after plugin should expose interface to implementer. but currently, plugin only could change the header value, could not dynamically add / remove headers
   
   thx
   
   
   
   ### Environment
   
   - APISIX version (run `apisix version`):  3.0
   - Operating system (run `uname -a`): Centos7
   - OpenResty / Nginx version (run `openresty -V` or `nginx -V`):
   - etcd version, if relevant (run `curl http://127.0.0.1:9090/v1/server_info`): 3.5.x
   - APISIX Dashboard version, if relevant: 
   - Plugin runner version, for issues related to plugin runners:  apisix-runner-starter, 0.4.0
   - LuaRocks version, for installation issues (run `luarocks --version`):
   


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