Nginx位置块被忽略

Question

我很难理解这个Nginx配置中的POST请求是怎么回事。根据我在那里添加的调试消息，在这里发布请求时，添加的头是X-debug-messages 0和4.看起来像位块正被完全忽略。有什么想法吗？

daemon off;
user www-data;
worker_processes 2;

events {
    worker_connections 2048;
    multi_accept on;
    use epoll;
}

http {
    server {
        resolver 8.8.8.8;
        listen 80 default_server;
        location / {
            proxy_pass              $scheme://<dest>$request_uri;
            proxy_set_header        Host $http_host;
            proxy_set_header        X-Real-IP       $remote_addr;
            proxy_set_header        X-Forwarded-For $proxy_add_x_forwarded_for;
        }
    }

    server {
        listen 80;
        server_name <hostname>;

        add_header X-debug-message0 "In the hostname server block" always;
        location / {
            add_header X-debug-message1 "Checking for POST method" always;
            if ($request_method = POST) {
                add_header X-debug-message2 "Ready for proxy_pass" always;
                proxy_pass https://www.<hostname>$request_uri;
                break;
            }
            add_header X-debug-message3 "Skipped proxy_pass" always;
            break;
        }
        add_header X-debug-message4 "Going to redirect" always;
        return 301 https://www.<hostname>$request_uri;
    }

    server {
        listen                443;
        server_name           <hostname>;
        ssl                   on;
        ssl_certificate       /app/certs/cert.pem;
        ssl_certificate_key   /app/certs/cert.key;
        return 301 https://www.<hostname>$request_uri;    
    }
}