mikyll commented on issue #12121:
URL: https://github.com/apache/apisix/issues/12121#issuecomment-2775684834
## Update
I tried using `ngx.var` instead of `ctx.var` and it seems to be working...
### Example
(Considering the MRE above) additional route, to be added in
`conf/apisix.yaml`:
```yaml
routes:
# [...]
- id: test4
uri: /test4
upstream_id: httpbin_internal
plugins:
proxy-rewrite:
uri: /status/200
headers:
set:
status: $status # <- this
hostname: $hostname # <- this
serverless-pre-function:
phase: header_filter
functions:
- |
return function(conf, ctx)
local core = require("apisix.core")
local status, err, n_resolved =
core.utils.resolve_var("$status", ngx.var)
local hostname, err, n_resolved =
core.utils.resolve_var("$hostname", ngx.var)
core.log.warn("status: " .. tostring(status) .. ", hostname: "
.. tostring(hostname))
ngx.header["status"] = status
ngx.header["hostname"] = hostname
end
```
Test request:
```bash
curl -s -i localhost:9080/test4
HTTP/1.1 200 OK
...
status: 200
hostname: 0be5febe953a
```
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