Hello everyone,

i have a problem in configuring Nginx.

I have a location that serves as a proxy for a well-specified url "/login".
This location can receive both GET and POST request.
GET request have no body and should be proxied to a default and
well-know host.
POST request contains the host to be proxied to in their body
(extractable by a regexp).

To avoid use of "if", i was using a map:

map $request_body $target_tenant_loginbody {
~*account=(.*)%40(?P<body_tenant>.*)&password.* $body_tenant;
default default.example.com;
}

location /login {
echo_read_request_body;

proxy_pass http://$target_tenant_loginbody:9000;

# Debug
proxy_set_header X-Debug-Routing-Value
$target_tenant_loginbody;

proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For
$proxy_add_x_forwarded_for;
}

This is not working (works with the GETs but not with the POSTs), seems
that the map returns always the default value even if the regexp works
(tested on regex101.com).
After a few tests, i understood that $request_body is empty or
non-initialized. I tried also with $echo_request_body, that seems
correctly initialized in location context but not in the map.

I read about a lot of issues and people having problem with empty
$request_body.

Maybe is there another approach you could direct me to?

Thanks in advance,
Sandro.


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