mdh67899 opened a new issue #3474:
URL: https://github.com/apache/apisix/issues/3474
### Issue description
location = /info {
proxy_pass http://192.168.1.10/index.html;
set $appname "app1";
}
我这边有个需求，nginx的location样例是这样写的，转发的时候会在location里设置一个appname变量，用来标记是转发给哪个后台应用的，log_format会将appname打印到日志里，请问在apisix里该怎么实现变量赋值的功能呢？谢谢
### Environment
* apisix version (cmd: `apisix version`):
* OS (cmd: `uname -a`):
* OpenResty / Nginx version (cmd: `nginx -V` or `openresty -V`):
* etcd version, if have (cmd: run `curl
http://127.0.0.1:9090/v1/server_info` to get the info from server-info API):
* apisix-dashboard version, if have:
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