我有一些文件在我的根目录（/ var / www / data）之外，并希望通过URL提供它们，例如https://example.com/data/?id=123456 . 我会使用X-Accel-Redirect标头 . 我的nginx配置如下：

server {

    server_name example.com;
    server_tokens off;
    root /var/www/html/;

    location / {
        index index.php index.html;
    }
    location ~ \.php(?:$|/) {
        include snippets/fastcgi-php.conf;
        fastcgi_pass unix:/run/php/php7.2-fpm.sock;
        fastcgi_split_path_info ^(.+\.php)(/.+)$;
        fastcgi_param MOD_X_ACCEL_REDIRECT_ENABLED on;
        fastcgi_param MOD_X_ACCEL_REDIRECT_PREFIX /data/;
    }

    location /data/ {
        internal;
        alias /var/www/data/;
    }

    listen 443 ssl; 
    ssl_certificate ...; 
    ssl_certificate_key ...;
    ssl_dhparam ...; 
}

现在我试图像这样在https://example.com/data/index.php上提供文件：

$url = "/var/www/data/file.jpg;
header("X-Accel-Redirect: ".$url);

我收到404错误，nginx错误日志如下：

[error] 8401#8401: *1 open() "/var/www/html/var/www/data/file.jpg" failed (2: No such file or directory), client: .....

请帮我解决这个问题！

php nginx backend x-accel-redirect