Problems with nginx try_files setup - django

Question

I'm trying to set up a project using django, gunicorn and nginx and I'm having trouble with the nginx configuration. More precisely when I use try_files.
If I use if (!-f $request_filename) {...} everything works fine but if use
try_files ... Django generates the exception:
Invalid HTTP_HOST header: 'myproject_server'. The domain name provided is not valid according to RFC 1034/1035.
Once everything works using the if ... I assume that the other settings
(gunicorn etc) are correct.
The configuration files I'm using are:
/home/myproject/myproject/settings.py (django)
...
ALLOWED_HOSTS = [192.168.200.100, ]
...
/etc/nginx/sites-available/myproject (this one WORKS)
upstream myproject_server {
unix server:/home/myproject/run/gunicorn.sock fail_timeout = 0;
}
server {
listen 80;
server_name 192.168.200.100;
root /home/myproject;
location /media/ {}
location /static/ {}
location / {
proxy_set_header Host $HTTP_HOST;
proxy_set_header X-Real-IP $REMOTE_ADDR;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header X-Forwarded-Proto $scheme;
if (!-f $request_filename) {
proxy_pass http://myproject_server;
break;
}
}
}
/etc/nginx/sites-available/myproject (this one DOES NOT WORK)
upstream myproject_server {
unix server: /home/myproject/run/gunicorn.sock fail_timeout = 0;
}
server {
listen 80;
server_name 192.168.200.100;
root /home/myproject;
location /media/ {}
location /static/ {}
location / {
proxy_set_header Host $HTTP_HOST;
proxy_set_header X-Real-IP $REMOTE_ADDR;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header X-Forwarded-Proto $scheme;
try_files $uri #myproject_backend;
}
location #myproject_backend {
proxy_pass $scheme://myproject_server;
}
}
What am I doing wrong?
Thanks in advance any help.
PS: English is not my native language so I apologize for the (many) errors.

Answer 1

proxy_set_header should be in the same location as proxy_pass.
location / {
try_files $uri #myproject_backend;
}
location #myproject_backend {
proxy_set_header Host $HTTP_HOST;
proxy_set_header X-Real-IP $REMOTE_ADDR;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header X-Forwarded-Proto $scheme;
proxy_pass http://myproject_server;
}