Nginx实现字符串密钥认证

server {
    listen       9999;
    server_name  localhost;
    
    location /docs {
        proxy_pass http://127.0.0.1:8999/docs;
    }
    
    location /openapi.json {
        proxy_pass http://127.0.0.1:8999/openapi.json;
    }

    location / {
        # 设置密钥
        set $key "123456";
        set $iskey false;
        
        # 如果路由参数中的key等于密钥
        if ($arg_key = $key) {
            set $iskey true;
        }

        # 如果请求头参数中的key等于密钥
        if ($http_key = $key) {
            set $iskey true;
        }
        
        # 上方2个条件均未满足
        if ($iskey = false) {
            rewrite ^ /error403 last;
        }
    
        proxy_pass http://127.0.0.1:8999;
    }

    location = /error403 {
        internal;
        add_header Content-Type 'application/json';
        return 200 '{"error": "密钥错误"}';
    }
}