# Nginx UI Template Start
name = "Reverse Proxy"
author = "@0xJacky"
description = { en = "Reverse Proxy Config", zh_CN = "反向代理配置"}

[variables.enableWebSocket]
type = "boolean"
name = { en = "Enable WebSocket", zh_CN = "启用 WebSocket"}
value = true

[variables.clientMaxBodySize]
type = "string"
name = { en = "Client Max Body Size", zh_CN = "客户端最大请求内容大小"}
value = "1000m"

[variables.scheme]
type = "select"
name = { en = "Scheme", zh_CN = "协议"}
value = "http"
mask = { http = { en = "HTTP" }, https = { en = "HTTPS" } }

[variables.host]
type = "string"
name = { en = "Host", zh_CN = "主机"}
value = "127.0.0.1"

[variables.port]
type = "string"
name = { en = "Port", zh_CN = "端口"}
value = 9000
# Nginx UI Template End

# Nginx UI Custom Start
{{- if .enableWebSocket }}
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";
}
{{- end }}
# Nginx UI Custom End

if ($host != $server_name) {
    return 404;
}

location / {
        {{ if .enableWebSocket }}
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection $connection_upgrade;
        {{ end }}

        client_max_body_size {{ .clientMaxBodySize }};

        proxy_redirect off;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;
        proxy_set_header Forwarded $proxy_add_forwarded;

        proxy_pass {{ .scheme }}://{{ .host }}:{{ .port }}/;
 }