使用Nginx配置一个简单的反向代理

本教程介绍使用Nginx配置一个简单的反向代理，或者你也可以使用在线网站 DigitalOcean 直接生成想要的配置

【nginx配置文件的目录结构】

└──conf
    ├── nginx.conf
    ...
    └── conf.d
         ├── proxies.conf
         └── proxy.conf

1、在 nginx.conf 文件的 http节点 中添加如下配置

# Connection header for WebSocket reverse proxy
map $http_upgrade $connection_upgrade {
    default upgrade;
    ""      close;
}

map $remote_addr $proxy_forwarded_elem {

    # IPv4 addresses can be sent as-is
    ~^[0-9.]+$        "for=$remote_addr";

    # IPv6 addresses need to be bracketed and quoted
    ~^[0-9A-Fa-f:.]+$ "for=\"[$remote_addr]\"";

    # Unix domain socket names cannot be represented in RFC 7239 syntax
    default           "for=unknown";
}

map $http_forwarded $proxy_add_forwarded {

    # If the incoming Forwarded header is syntactically valid, append to it
    "~^(,[ \\t]*)*([!#$%&'*+.^_`|~0-9A-Za-z-]+=([!#$%&'*+.^_`|~0-9A-Za-z-]+|\"([\\t \\x21\\x23-\\x5B\\x5D-\\x7E\\x80-\\xFF]|\\\\[\\t \\x21-\\x7E\\x80-\\xFF])*\"))?(;([!#$%&'*+.^_`|~0-9A-Za-z-]+=([!#$%&'*+.^_`|~0-9A-Za-z-]+|\"([\\t \\x21\\x23-\\x5B\\x5D-\\x7E\\x80-\\xFF]|\\\\[\\t \\x21-\\x7E\\x80-\\xFF])*\"))?)*([ \\t]*,([ \\t]*([!#$%&'*+.^_`|~0-9A-Za-z-]+=([!#$%&'*+.^_`|~0-9A-Za-z-]+|\"([\\t \\x21\\x23-\\x5B\\x5D-\\x7E\\x80-\\xFF]|\\\\[\\t \\x21-\\x7E\\x80-\\xFF])*\"))?(;([!#$%&'*+.^_`|~0-9A-Za-z-]+=([!#$%&'*+.^_`|~0-9A-Za-z-]+|\"([\\t \\x21\\x23-\\x5B\\x5D-\\x7E\\x80-\\xFF]|\\\\[\\t \\x21-\\x7E\\x80-\\xFF])*\"))?)*)?)*$" "$http_forwarded, $proxy_forwarded_elem";

    # Otherwise, replace it
    default "$proxy_forwarded_elem";
}

2、在 conf.d 目录下创建 proxy.conf 配置文件，内容如下

proxy_http_version                 1.1;
proxy_cache_bypass                 $http_upgrade;

# Proxy headers
proxy_set_header Upgrade           $http_upgrade;
proxy_set_header Connection        $connection_upgrade;
proxy_set_header Host              $host;
proxy_set_header X-Real-IP         $remote_addr;
proxy_set_header Forwarded         $proxy_add_forwarded;
proxy_set_header X-Forwarded-For   $proxy_add_x_forwarded_for;
proxy_set_header X-Forwarded-Proto $scheme;
proxy_set_header X-Forwarded-Host  $host;
proxy_set_header X-Forwarded-Port  $server_port;

# Proxy timeouts
proxy_connect_timeout              60s;
proxy_send_timeout                 60s;
proxy_read_timeout                 60s;

3、在 conf.d 目录下创建反向代理配置项 proxies.conf

server {
	listen       55555;
	server_name  localhost;

	location / {
        proxy_pass http://localhost:8080/;
        include    conf.d/proxy.conf;
	}
}