django, gunicorn, nginx下設定subpath

google上找到滿多都是apache和uwsgi的設定，
這個設定讓我花了好一段時間才找到。

設定是wsgi server和有用nginx的upstream才有用

很簡單只需要設定

proxy_set_header SCRIPT_NAME $your_subpath

這樣django就會正常囉！

以下是稍微詳細一點的nginx設定

upstream some_urls {

  # fail_timeout=0 means we always retry an upstream even if it failed

  # to return a good HTTP response (in case the Unicorn master nukes a

  # single worker for timing out).

  server unix:/path/to/your/gunicorn/socket fail_timeout=0;

}

server {

    listen   80;

    server_name example.com;

    client_max_body_size 4G;

    location /your_subpath/ {

        # an HTTP header important enough to have its own Wikipedia entry:

        #   http://en.wikipedia.org/wiki/X-Forwarded-For

        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;

        # enable this if and only if you use HTTPS, this helps Rack

        # set the proper protocol for doing redirects:

        # proxy_set_header X-Forwarded-Proto https;

        # pass the Host: header from the client right along so redirects

        # can be set properly within the Rack application

        proxy_set_header Host $http_host;

        # setting for running in a subpath

        proxy_set_header SCRIPT_NAME /your_subpath;

        # we don't want nginx trying to do something clever with

        # redirects, we set the Host: header above already.

        proxy_redirect off;

        # set "proxy_buffering off" *only* for Rainbows! when doing

        # Comet/long-poll stuff.  It's also safe to set if you're

        # using only serving fast clients with Unicorn + nginx.

        # Otherwise you _want_ nginx to buffer responses to slow

        # clients, really.

        # proxy_buffering off;

        # Try to serve static files from nginx, no point in making an

        # *application* server like Unicorn/Rainbows! serve static files.

        if (!-f $request_filename) {

            proxy_pass http://some_urls;

            break;

        }

    }

Blogger貼code還真不好看就是了

參照PEP 333
對python而言SCRIPT_NAME是用來知道這個python程式他對server而言他是在哪個路徑下面。所以上面範例中的/your_subpath設定後就能用了