shelltea commented on issue #6066:
URL: https://github.com/apache/apisix/issues/6066#issuecomment-1009638712
```
function _M.rewrite(conf, ctx)
local headers = ngx.req.get_headers()
local uuid_val = get_request_id(conf.algorithm)
if not headers[conf.header_name] then
core.request.set_header(ctx, conf.header_name, uuid_val)
end
if conf.include_in_response then
ctx["request-id-" .. conf.header_name] = uuid_val
end
end
```
From the source code above, request-id plugin generated a request-id whether
or not the request contains one.I think if a request has a request-id means
request-id plugin don't have to generate one and response the same request-id
sent by the client.If request don't have a request-id means request-id plugin
need to generate and response the request-id generated by itself.So it not
dependent on an option.
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