快速API后端接收请求但没有响应，Nginx

Question

我有一个由nginx服务的前端reactjs。如下所示：

server { 
    listen 80 default_server; 
    server_name website.* www.website.*; 
    root /home/developer/website/frontend/build; 

    location/{ 
     try_files $uri /index.html; 
    } 

    location /api { 
     proxy_set_header X-Real-IP $remote_addr; 
     proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; 
     proxy_pass http://127.0.0.1:4000; 
    } 

} 

此外，我有第二个快速应用程序接收请求在127.0.0.1:4000。前端调用提取到'api/something'，快速应用程序接收并处理它，但没有响应，客户端错误504（网关超时）。有任何想法吗？

Answer 1

您缺少上游服务器指令。试试这个

upstream api { 
    server 127.0.0.1:4000; 
} 

# remove www from the url 
server { 
    listen 80; 
    server_name www.website.com; 
    return 301 $scheme://website.com$request_uri; 
} 

server { 
    listen 0.0.0.0:80; 
    server_name website.com website; 
    error_log /var/log/nginx/website.com-error.log error; 
    access_log /var/log/nginx/website.log; 

    # pass the request to the node.js server with the correct headers 
    location /api/ { 
     proxy_pass http://api/; 
     proxy_ignore_headers X-Accel-Expires Expires Cache-Control; 
     proxy_ignore_headers Set-Cookie; 
     proxy_hide_header Set-Cookie; 
     proxy_set_header X-Real-IP $remote_addr; 
     proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; 
     proxy_set_header Host $http_host; 
     proxy_redirect off; 
     proxy_set_header X-NginX-Proxy true; 
    } 
}