The proxy-rewrite plugin does not support pass nginx's variable within header

[yongboy]

Issue description

I want to pass the nginx's Embedded Variables for upstream applications, below is my proxy-rewrite plugin's config:

{
    "headers": {
        "X-AUTH-UID": "$arg_uid"
    },
    "regex_uri": [
        "^/monitor/(.*)",
        "/$1"
    ]
}

The test url：

curl http://gw.dev/monitor/hello?uid=10001

The upstream application got the raw req info below:

GET /hello?uid=10001 HTTP/1.1
Host: gw.dev
X-Real-IP: 172.19.0.1
X-Forwarded-For: 172.19.0.1
X-Forwarded-Proto: http
X-Forwarded-Host: gw.dev
X-Forwarded-Port: 9080
User-Agent: curl/7.64.1
Accept: */*
X-AUTH-UID: $arg_uid

......

Environment

• apisix version : 1.5
• OS: MacOS
• OpenRestyx / Nginx version: nginx/1.17.3

[spacewander]

Only constant value is supported.

[Firstsawyou]

Assigned to me.

[BFergerson]

I believe I'm facing a similar issue. I am trying to use two plugins to create a sort of password-protected area in my application. I was hoping to use the basic-auth plugin for username/password functionality and proxy-rewrite to automatically add the username to the route. For example, rerouting requests to host:3000 to host:3000/{username}.

Is that similar to this issue and would it be solved with work done on this issue?

[spacewander]

@BFergerson
It is another thing since the username is not exposed to ctx.var yet. You might need to open a new issue for it.