ZhangShangyu opened a new issue, #9997:
URL: https://github.com/apache/apisix/issues/9997
### Current Behavior
We have implement a Golang plugin to rewrite the request path, after rewrite
the path the original args(query string) are dropped, it is not our expected
behavior
1. the Golang plugin example:
```go
func (a *Auth) RequestFilter(conf interface{}, w http.ResponseWriter, r
pkgHTTP.Request) {
newPath := string(r.Path()) + "/v2"
r.SetPath([]byte(newPath))
}
```
2. enable the ext-plugin-post-req and do request with query string, result
is unexpected
```
curl localhost:9080/test?a=1
get access log in upstream backend: {"query": ""}
```
3. disable the ext-plugin-post-req and do request with query string, result
is expected
```
curl localhost:9080/test?a=1
get access log in upstream backend: {"query": "a=1"}
```
### Expected Behavior
I checked the ext-plugin source code
https://github.com/apache/apisix/blob/master/apisix/plugins/ext-plugin/init.lua#L642
it will set path as upstream_uri, even if there are query strings will not
be added
it can be fixed it by add these code, i retry do request and there are query
string in upstream log
```lua
if var.args then
var.upstream_uri = path .. '?' .. var.args
end
```
### Error Logs
_No response_
### Steps to Reproduce
1. implement a Go plugin to rewrite path
2. do request with query string
### Environment
- APISIX version (run `apisix version`): 2.15.3
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