Nginx changes POST to GET using proxy_pass - nginx

Question

I want to use Nginx create a gateway to receive requests and pass them along to a network of microservices.
What I need Nginx to do is just act as a proxy server, taking the requests, passing them along to whatever service, and returning the response without any changes.
This is my configuration for my local setup:
server {
listen 8080;
location /api/register/ {
proxy_pass http://micro_auth_backend:8082;
}
location /api/location/ {
proxy_pass http://localhost:8088;
}
}
It works correctly for GET requests, but when doing a POST call, the server will always receive a GET response.
I have tried adding some more configs inside the location, such as this example below, but so far nothing has worked:
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
Any suggestions would be appreciated.
Thank you

Answer 1

Just removed the trailing slash on location:
location /api/register {
proxy_pass http://micro_auth_backend:8082;
}
Now it works.

Answer 2

you can add this code to your nginx.conf file. It works for me.
location /api/register/ {
proxy_pass http://localhost:8082;
proxy_http_version 1.1;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection keep-alive;
proxy_set_header Host $host;
proxy_cache_bypass $http_upgrade;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header X-Forwarded-Proto $scheme;
}
location /api/location/ {
proxy_pass http://localhost:8088;
proxy_http_version 1.1;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection keep-alive;
proxy_set_header Host $host;
proxy_cache_bypass $http_upgrade;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header X-Forwarded-Proto $scheme;
}