spacewander commented on issue #4470:
URL: https://github.com/apache/apisix/issues/4470#issuecomment-867273669
Interesting. I try it locally but can't reproduce it. Here is my route:
```
{
"uri": "/xff",
"plugins": {
"proxy-rewrite": {
"disable": false,
"headers": {
"ENV": "pre",
"Host": "$host",
"X-Forwarded-For": "$proxy_add_x_forwarded_for"
},
"regex_uri": [
"/api/scrm/(.*)",
"/common-rest/$1"
]
}
},
"upstream": {
"type": "roundrobin",
"nodes": {
"127.0.0.1:1980": 1
}
}
}
```
Here is how I try
```bash
￥ curl http://127.0.0.1:9080/xff -i
HTTP/1.1 200 OK
Content-Type: text/plain; charset=utf-8
Transfer-Encoding: chunked
Connection: keep-alive
Date: Thu, 24 Jun 2021 01:55:52 GMT
Server: APISIX/2.6
uri: /xff
accept: */*
env: pre
host: 127.0.0.1:9080
user-agent: curl/7.68.0
x-forwarded-for: 127.0.0.1
x-forwarded-host: 127.0.0.1
x-forwarded-port: 9080
x-forwarded-proto: http
x-real-ip: 127.0.0.1
￥ curl http://127.0.0.1:9080/xff -i -H "X-Forwarded-For: 220.249.1.1"
HTTP/1.1 200 OK
Content-Type: text/plain; charset=utf-8
Transfer-Encoding: chunked
Connection: keep-alive
Date: Thu, 24 Jun 2021 01:56:35 GMT
Server: APISIX/2.6
uri: /xff
accept: */*
env: pre
host: 127.0.0.1:9080
user-agent: curl/7.68.0
x-forwarded-for: 220.249.1.1, 127.0.0.1
x-forwarded-host: 127.0.0.1
x-forwarded-port: 9080
x-forwarded-proto: http
x-real-ip: 127.0.0.1
```
The `x-forwarded-for` is never null.
Can you provide a packet capture file to see if x-forwarded-for is missing?
--
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.
For queries about this service, please contact Infrastructure at:
[email protected]
