How to configure nginx properly with gunicorn and flask?












0















I am running a gunicorn server at http://ip:8000. I have nginx server in the same machine listening at http://ip:8080.



When I access http://ip:8000 (gunicorn) directly without going through nginx, I am not getting any error. My webapp runs fine.



But when I access http://ip:8080 (nginx), it opens the first login page of my app. But once I give the user name and password. It thorws a CORS error:



Access to XMLHttpRequest at 'http://ip:8000/login' from origin 'http://ip:8080' has been blocked by CORS policy: Response to preflight request doesn't pass access control check: No 'Access-Control-Allow-Origin' header is present on the requested resource.


When I add following code in my flask code, it does not throw the CORS error but now there is a new problem. Once i give the username and password, it lets me login and then redirects me back to the login page and the url in the address bar changes to "http://ip:8000/login" which is the gunicorn server's address.



from flask_cors import CORS
CORS(app)


My nginx conf file looks like this:



server{
listen 8080;
server_name ip;
root /path/to/root;
access_log /path/to/access.log;
error_log /path/to/error.log;
location /{
proxy_pass http://ip:8000;
add_header 'Access-Control-Allow-Origin' "$http_origin";
add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS, DELETE, PUT';
add_header 'Access-Control-Allow-Credentials' 'true';
add_header 'Access-Control-Allow-Headers' 'User-Agent,Keep-Alive,Content-Type';
proxy_set_header Host $host:$server_port;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection "upgrade";
proxy_redirect off;
proxy_set_header X-Forwarded-Proto $scheme;
}
}


Can anyone help me solve this issue?










share|improve this question



























    0















    I am running a gunicorn server at http://ip:8000. I have nginx server in the same machine listening at http://ip:8080.



    When I access http://ip:8000 (gunicorn) directly without going through nginx, I am not getting any error. My webapp runs fine.



    But when I access http://ip:8080 (nginx), it opens the first login page of my app. But once I give the user name and password. It thorws a CORS error:



    Access to XMLHttpRequest at 'http://ip:8000/login' from origin 'http://ip:8080' has been blocked by CORS policy: Response to preflight request doesn't pass access control check: No 'Access-Control-Allow-Origin' header is present on the requested resource.


    When I add following code in my flask code, it does not throw the CORS error but now there is a new problem. Once i give the username and password, it lets me login and then redirects me back to the login page and the url in the address bar changes to "http://ip:8000/login" which is the gunicorn server's address.



    from flask_cors import CORS
    CORS(app)


    My nginx conf file looks like this:



    server{
    listen 8080;
    server_name ip;
    root /path/to/root;
    access_log /path/to/access.log;
    error_log /path/to/error.log;
    location /{
    proxy_pass http://ip:8000;
    add_header 'Access-Control-Allow-Origin' "$http_origin";
    add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS, DELETE, PUT';
    add_header 'Access-Control-Allow-Credentials' 'true';
    add_header 'Access-Control-Allow-Headers' 'User-Agent,Keep-Alive,Content-Type';
    proxy_set_header Host $host:$server_port;
    proxy_set_header X-Real-IP $remote_addr;
    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    proxy_set_header Upgrade $http_upgrade;
    proxy_set_header Connection "upgrade";
    proxy_redirect off;
    proxy_set_header X-Forwarded-Proto $scheme;
    }
    }


    Can anyone help me solve this issue?










    share|improve this question

























      0












      0








      0








      I am running a gunicorn server at http://ip:8000. I have nginx server in the same machine listening at http://ip:8080.



      When I access http://ip:8000 (gunicorn) directly without going through nginx, I am not getting any error. My webapp runs fine.



      But when I access http://ip:8080 (nginx), it opens the first login page of my app. But once I give the user name and password. It thorws a CORS error:



      Access to XMLHttpRequest at 'http://ip:8000/login' from origin 'http://ip:8080' has been blocked by CORS policy: Response to preflight request doesn't pass access control check: No 'Access-Control-Allow-Origin' header is present on the requested resource.


      When I add following code in my flask code, it does not throw the CORS error but now there is a new problem. Once i give the username and password, it lets me login and then redirects me back to the login page and the url in the address bar changes to "http://ip:8000/login" which is the gunicorn server's address.



      from flask_cors import CORS
      CORS(app)


      My nginx conf file looks like this:



      server{
      listen 8080;
      server_name ip;
      root /path/to/root;
      access_log /path/to/access.log;
      error_log /path/to/error.log;
      location /{
      proxy_pass http://ip:8000;
      add_header 'Access-Control-Allow-Origin' "$http_origin";
      add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS, DELETE, PUT';
      add_header 'Access-Control-Allow-Credentials' 'true';
      add_header 'Access-Control-Allow-Headers' 'User-Agent,Keep-Alive,Content-Type';
      proxy_set_header Host $host:$server_port;
      proxy_set_header X-Real-IP $remote_addr;
      proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
      proxy_set_header Upgrade $http_upgrade;
      proxy_set_header Connection "upgrade";
      proxy_redirect off;
      proxy_set_header X-Forwarded-Proto $scheme;
      }
      }


      Can anyone help me solve this issue?










      share|improve this question














      I am running a gunicorn server at http://ip:8000. I have nginx server in the same machine listening at http://ip:8080.



      When I access http://ip:8000 (gunicorn) directly without going through nginx, I am not getting any error. My webapp runs fine.



      But when I access http://ip:8080 (nginx), it opens the first login page of my app. But once I give the user name and password. It thorws a CORS error:



      Access to XMLHttpRequest at 'http://ip:8000/login' from origin 'http://ip:8080' has been blocked by CORS policy: Response to preflight request doesn't pass access control check: No 'Access-Control-Allow-Origin' header is present on the requested resource.


      When I add following code in my flask code, it does not throw the CORS error but now there is a new problem. Once i give the username and password, it lets me login and then redirects me back to the login page and the url in the address bar changes to "http://ip:8000/login" which is the gunicorn server's address.



      from flask_cors import CORS
      CORS(app)


      My nginx conf file looks like this:



      server{
      listen 8080;
      server_name ip;
      root /path/to/root;
      access_log /path/to/access.log;
      error_log /path/to/error.log;
      location /{
      proxy_pass http://ip:8000;
      add_header 'Access-Control-Allow-Origin' "$http_origin";
      add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS, DELETE, PUT';
      add_header 'Access-Control-Allow-Credentials' 'true';
      add_header 'Access-Control-Allow-Headers' 'User-Agent,Keep-Alive,Content-Type';
      proxy_set_header Host $host:$server_port;
      proxy_set_header X-Real-IP $remote_addr;
      proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
      proxy_set_header Upgrade $http_upgrade;
      proxy_set_header Connection "upgrade";
      proxy_redirect off;
      proxy_set_header X-Forwarded-Proto $scheme;
      }
      }


      Can anyone help me solve this issue?







      nginx flask gunicorn nginx-reverse-proxy






      share|improve this question













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      asked Jan 2 at 8:46









      akshay rautakshay raut

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