由于SS挂的厉害，网上的教程又语焉不详，这里记录一下。
原理：用Nginx（Caddy）解TLS，V2Ray处理里面的连接。
不建议初学者直接上手搞WebSocket+TLS+Web+Nginx+CDN：容易出错的地方太多。
请务必读完全文再操作，特别是注意部分。

Preparation

• SSL: https://freessl.cn
• 域名：https://www.freenom.com ，或者自己找一个

WebSocket

WebSocket可以直接连接，或者套CDN。

Server

{
  "inbounds": [
    {
      "port": 10001,  # 本地端口，不冲突即可
      "listen":"127.0.0.1", # V2Ray只监听本机
      "protocol": "vmess",
      "settings": {
        "clients": [
          {
            "id": "d111702d-8604-4358-b1fa-xxxxxxxxx",
            "alterId": 64
          }
        ]
      },
      "streamSettings": {
        "network": "ws",
        "wsSettings": {
        "path": "/ray/" # 注意最后的反斜杠必须和Nginx一致
        }
      }
    }
  ],
  "outbounds": [
    {
      "protocol": "freedom",
      "settings": {}
    }
  ]
}

server {
  server_name           {subdomain.domain.tld};
  listen 8.8.8.8 ssl;
  listen [2001::]:443 ssl; # 让Nginx也监听v6
  ssl on;
  ssl_certificate       /etc/nginx/ssl/xxx.pem; # SSL证书位置
  ssl_certificate_key   /etc/nginx/ssl/xxx.key;
  ssl_protocols         TLSv1 TLSv1.1 TLSv1.2;
  ssl_ciphers           HIGH:!aNULL:!MD5;
  location /ray/ {
        proxy_redirect off;
        proxy_pass http://127.0.0.1:10001; # 注意端口和上面一致
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";
        # Show realip in v2ray access.log
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header Host $host; # 必须有这条
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
     }
}

Client

{
  "log": {
    "error": "",
    "loglevel": "debug",
    "access": ""
  },
  "inbounds": [
    {
      "listen": "127.0.0.1",
      "protocol": "socks",
      "settings": {
        "ip": "",
        "userLevel": 0,
        "timeout": 0,
        "udp": false,
        "auth": "noauth"
      },
      "port": "8091" # SOCKS代理本地端口
    }
  ],
  "outbounds": [
    {
      "mux": {
        "enabled": false,
        "concurrency": 8
      },
      "protocol": "vmess",
      "streamSettings": {
        "wsSettings": {
          "path": "/ray/",# 注意和上面一致
          "headers": {
            "host": ""
          }
        },
        "tlsSettings": {
          "allowInsecure": true
        },
        "security": "tls",
        "network": "ws"
      },
      "tag": "",
      "settings": {
        "vnext": [
          {
            "address": "上面的domain",
            "users": [
              {
                "id": "和上面的UUID一样,
                "alterId": 64,
                "level": 0,
                "security": "auto"
              }
            ],
            "port": 443 # Nginx监听的端口
          }
        ]
      }
    }
  ],
  "dns": {
    "servers": [
      ""
    ]
  },
  "routing": {
    "strategy": "rules",
    "settings": {
      "domainStrategy": "IPIfNonMatch",
      "rules": [
        {
          "outboundTag": "direct",
          "type": "field",
          "ip": [
            "geoip:cn",
            "geoip:private"
          ],
          "domain": [
            "geosite:cn",
            "geosite:speedtest"
          ]
        }
      ]
    }
  },
  "transport": {}
}

注意

• 如果挂Cloudflare:
  • 如果自签证书（真的没必要），SSL必须设flexible：否则CF会报证书错误
  • 如果使用正常SSL证书，SSL必须设Full：否则Nginx有可能随便丢一个站点过去
  • 如果是新域名：等SSL生成后才能操作
  • Cloudflare的免费证书只支持一级subdomain的SSL（*.domain.tld）：如果域名是二级以上，请加钱或重新弄SSL。
• 利用curl进行debug。在任何情况下，错误码不应该是404.

HTTP2 with Caddy

Cloudflare的免费WebSocket优先级不高：HTTP2有可能看网页更快。当然了，这个方案没有什么CDN能支持。

Server

https://域名:2053 {
    root /usr/share/nginx/html/
    tls /etc/nginx/ssl/公钥.pem /etc/nginx/ssl/私钥.key { # 也可以让Caddy自己找Letsencrypt生成
        ciphers ECDHE-ECDSA-WITH-CHACHA20-POLY1305 ECDHE-ECDSA-AES256-GCM-SHA384 ECDHE-ECDSA-AES256-CBC-SHA
        curves p384
        key_type p384
    }
    proxy /v2ray https://localhost:12000 { # 端口号是V2Ray监听的本地端口
        insecure_skip_verify
        transparent
        header_upstream X-Forwarded-Proto "https"
        header_upstream Host "域名
    }
    header / {
        Strict-Transport-Security "max-age=31536000;"
        X-XSS-Protection "1; mode=block"
        X-Content-Type-Options "nosniff"
        X-Frame-Options "DENY"
    }
}

{
  "inbounds": [
    {
      "port": 12000, # 监听本地端口号
      "listen": "127.0.0.1", # 只监听本地
      "protocol": "vmess",
      "settings": {
        "clients": [
          {
            "id": "UUID",
            "alterId": 64
          }
        ]
      },
      "streamSettings": {
        "network": "h2",
        "httpSettings": {
          "path": "/v2ray",
          "host": ["域名"]
        },
        "security": "tls",
        "tlsSettings": {
          "certificates": [
            {
              "certificateFile": "/etc/nginx/ssl/公钥.pem",
              "keyFile": "/etc/nginx/ssl/私钥.key"
            }
          ]
        }
      }
    }
  ],
  "outbounds": [
    {
      "protocol": "freedom",
      "settings": {}
    }
  ]
}

Client

{
  "inbounds": [
    {
      "port": 8091,
      "listen": "127.0.0.1",
      "protocol": "socks"
    }
  ],
  "outbounds": [
    {
      "protocol": "vmess",
      "settings": {
        "vnext": [
          {
            "address": "域名",
            "port": 2053, # Caddy监听的端口
            "users": [
              {
                "id": "同一个UUID",
                "alterId": 64
              }
            ]
          }
        ]
      },
      "streamSettings": {
        "network": "h2",
        "httpSettings": {
          "path": "/v2ray",
          "host": ["域名"]
        },
        "security": "tls"
      }
    }
  ]

Note

• Nginx不能做HTTP 2转发：因为作者觉得没必要。只能用Caddy。
• 如果要使用CDN：虽然很多CDN支持HTTP2（例如Cloudflare），但是我们需要的是回源走HTTP2。目前还没有找到这种东西。