asp.net-core - 无法在 NGINX 代理后面的 Blazor 服务器上加载静态文件

Question

我在 Ubuntu 20.04 上托管了一个使用 .NET5 创建的 BlazorServerSide。当我直接使用 dotnet 命令启动应用程序时，它工作正常。但是，当它由 systemd 服务启动时，不会加载静态文件。wwwroot 目录及其内容确实存在。顺便说一下，我已经删除了 /etc/nginx/sites-enabled/ 中默认文件的符号链接(symbolic link)。是这个原因吗？

nginx 配置:

server {
        server_name {My_FQDN} www.{My_FQDN};

        location / {
                proxy_pass         http://localhost:5000;
                proxy_http_version 1.1;
                proxy_set_header   Upgrade $http_upgrade;
                proxy_set_header   Connection keep-alive;
                proxy_set_header   Host $host;
                proxy_cache_bypass $http_upgrade;
                proxy_set_header   X-Forwarded-For $proxy_add_x_forwarded_for;
                proxy_set_header   X-Forwarded-Proto $scheme;
        }

    listen 443 ssl; # managed by Certbot
    ssl_certificate /etc/letsencrypt/live/www.{My_FQDN}/fullchain.pem; # managed by Certbot
    ssl_certificate_key /etc/letsencrypt/live/www.{My_FQDN}/privkey.pem; # managed by Certbot
    include /etc/letsencrypt/options-ssl-nginx.conf; # managed by Certbot
    ssl_dhparam /etc/letsencrypt/ssl-dhparams.pem; # managed by Certbot


}
server {
    if ($host = {My_FQDN}) {
        return 301 https://$host$request_uri;
    } # managed by Certbot


    if ($host = www.{My_FQDN}) {
        return 301 https://$host$request_uri;
    } # managed by Certbot


        server_name {My_FQDN}
        listen 80;
    return 404; # managed by Certbot
}

服务文件:

[Unit]
Description=MyBlazorApp.
After=local-fs.target

[Service]
Type=simple
ExecStart=/usr/bin/dotnet /home/{username}/{MY_BLAZOR_APP_DIR}/{MY_APP_NAME}.dll
RemainingAfterExit=yes
RestartSec=10
KillSignal=SIGINT
User=www-data
Environment=ASPNETCORE_ENVIRONMENT=Production
Environment=DOTNET_PRINT_TELEMETRY_MESSAGE=false

[Install]
WantedBy=multi-user.target

Answer 1

using Microsoft.AspNetCore.HttpOverrides;

...

app.UseForwardedHeaders(new ForwardedHeadersOptions
{
    ForwardedHeaders = ForwardedHeaders.XForwardedFor | ForwardedHeaders.XForwardedProto
});

app.UseAuthentication();

和通过将应用程序目录设置为 /var/www/{AppDir} 解决。