TIL

在Railway平台创建CORS代理

DevOps

一个要点：需要手动指定域名的端口为80, 只在Caddyfile中设置是不行的。不这样做，访问代理地址会报502错误。

相关代码：

Caddyfile

# Caddyfile for Hetzner StorageBox CORS proxy
# This creates a proxy that adds CORS headers to WebDAV requests

{
    # Global options
    auto_https off
}

# Main server block
:80 {
    # WebDAV proxy location - root path
    handle /* {
        
        # Reverse proxy to Hetzner StorageBox
        reverse_proxy https://xxx {
            header_up Host xxx
            header_up Authorization {http.request.header.Authorization}
        }
        
        # CORS headers
        header {
            Access-Control-Allow-Origin "*"
            Access-Control-Allow-Methods "GET, POST, PUT, DELETE, OPTIONS, PROPFIND, PROPPATCH, MKCOL, COPY, MOVE, LOCK, UNLOCK"
            Access-Control-Allow-Headers "Authorization, Depth, DNT, User-Agent, X-Requested-With, If-Modified-Since, Cache-Control, Content-Type, Range, X-CSRF-Token"
            Access-Control-Expose-Headers "Content-Length, Content-Range, DAV"
            Access-Control-Allow-Credentials "true"
        }
        
        # Cache control headers - disable caching for real-time updates
        header {
            Cache-Control "no-cache, no-store, must-revalidate, private"
            Pragma "no-cache"
            Expires "0"
        }
        
        # Handle preflight OPTIONS requests
        @options {
            method OPTIONS
        }
        respond @options 204
    }
}

Dockerfile

# Dockerfile for Caddy CORS proxy for Hetzner StorageBox
FROM caddy:2-alpine

# Copy the Caddyfile
COPY Caddyfile /etc/caddy/Caddyfile

# Expose port 80
EXPOSE 80

# Caddy will automatically start with the Caddyfile
CMD ["caddy", "run", "--config", "/etc/caddy/Caddyfile", "--adapter", "caddyfile"]

railway.json

dockerfilePath是相对整个仓库而言的，如果代理相关代码在子文件，需要修正相对路径，否则Railway会无法构建。

{
  "$schema": "https://railway.app/railway.schema.json",
  "build": {
    "builder": "DOCKERFILE",
    "dockerfilePath": "/proxy/Dockerfile"
  },
  "deploy": {
    "startCommand": "caddy run --config /etc/caddy/Caddyfile --adapter caddyfile",
    "restartPolicyType": "ON_FAILURE",
    "restartPolicyMaxRetries": 10
  }
}

相关：js-expressjs

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