Nginx case insensitive reverse proxy with Chinese filename

Shiaobin

10/21/23, 11:27 AM

I am setting up Nginx as a reverse proxy server. The back-end server is IIS. I want to match URL case insensitively (match app, App or APP etc.), here is my Nginx config file:

    location ~* /app/(.*) {
        proxy_pass http://192.168.1.192/app/$1$is_args$args;
        proxy_set_header Host $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 $http_x_forwarded_proto;
    }

It works well when the filename doesn't contain any Chinese character, but fails when the filename contains Chinese character. For example, when I request /app/中文.png, I'll see GET /app/銝剜?.png in the back-end server log file.

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