Nginx 服务器中的 SSL 握手失败

Question

我在使用服务器方面比较陌生，如果我的问题没有得到正确解释，我深表歉意。

我按照这些教程在 DigitalOcean 上托管了我的 Parse-Server
1. www.digitalocean.com/community/tutorials/how-to-migrate-a-parse-app-to-parse-server-on-ubuntu-14-04
2。 www.digitalocean.com/community/tutorials/how-to-secure-nginx-on-ubuntu-14-04

一切正常，除了当我的 iOS 应用程序尝试获取任何文件（使用 URL 的 PFFile）时遇到错误 "CFNetwork SSLHandshake failed (-9806)" 在浏览器中我得到 "cannot establish secure connection to server"。

我要获取的文件 URL 是 - “https://cobbet.com:1337/parse/files/IpFrZ8h4ZFjv9fKhUq3p7C2ca2WOBuAkbbzmtrxe/50c99849-9e31-4414-9552-f640fb43eb53_iphone_6.png”

但是，如果我将“https”更改为“http”并替换我的domain_name“cobbet.com” 通过实际 IP 地址“104.236.228.111”，我能够在浏览器上访问该文件。

文件 URL 有效 - “http://104.236.228.111:1337/parse/files/IpFrZ8h4ZFjv9fKhUq3p7C2ca2WOBuAkbbzmtrxe/50c99849-9e31-4414-9552-f640fb43eb53_iphone_6.png”

我的 Nginx 服务器配置 是

# HTTP - redirect all requests to HTTPS
server {
    listen 80;
    server_name cobbet.com
    return 301 https://$host$request_uri;
}

# HTTPS - serve HTML from /usr/share/nginx/html, proxy requests to /parse/
# through to Parse Server
server {
        listen 443 default_server ssl;
        server_name cobbet.com;

        root /usr/share/nginx/html;
        index index.html index.htm;

        ssl on;
        # Use certificate and key provided by Let's Encrypt:
        ssl_certificate /etc/letsencrypt/live/cobbet.com/fullchain.pem;
        ssl_certificate_key /etc/letsencrypt/live/cobbet.com/privkey.pem;
        ssl_session_timeout 10m;
        ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
        ssl_prefer_server_ciphers on;
        ssl_ciphers 'ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES256-GCM-SHA384:DHE-RSA-AES128-GCM-SHA256:DHE-DSS-AES128$
        ssl_dhparam /etc/ssl/certs/dhparam.pem;
        ssl_stapling on;
        ssl_stapling_verify on;
        add_header Strict-Transport-Security max-age=15768000;

        location ~ /.well-known {
                allow all;
        }


        # Pass requests for /parse/ to Parse Server instance at localhost:1337
        location /parse/ {
                proxy_set_header X-Real-IP $remote_addr;
                proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
                proxy_set_header X-NginX-Proxy true;
                proxy_pass http://localhost:1337/parse/;
                proxy_ssl_session_reuse off;
                proxy_set_header Host $http_host;
                proxy_redirect off;
        }

        # Pass requests for /dashboard/ to Parse Server instance at localhost:4040
        location /dashboard/ {
                proxy_set_header X-Real-IP $remote_addr;
                proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
                proxy_set_header X-NginX-Proxy true;
                proxy_pass http://localhost:4040/dashboard/;
                proxy_ssl_session_reuse off;
                proxy_set_header Host $http_host;
                proxy_redirect off;
        }



        location / {
                try_files $uri $uri/ =404;
        }
}

我该如何解决这个问题，以便我的应用程序可以在没有 SSL 错误的情况下下载文件？

谢谢！