v2ray h2 with tls ver 2, read before use: https://github.com/v2ray/discussion/issues/759#issuecomment-665089478

Caddyfile

domain

# Set this path to your site's directory.
#root * /usr/share/caddy
root * /var/www/domain

# Enable the static file server.
file_server

# Another common task is to set up a reverse proxy:
# reverse_proxy localhost:8080

# Or serve a PHP site through php-fpm:
#php_fastcgi unix//run/php/php7.4-fpm.sock

#encode gzip

# Refer to the Caddy docs for more information:
# https://caddyserver.com/docs/caddyfile
tls {
    dns cloudflare <cloudflare_api_here>
}

@v2ray_websocket {
  path /wspath
  header Connection *Upgrade*
  header Upgrade websocket
}

reverse_proxy @v2ray_websocket localhost:wsport

reverse_proxy /h2path http://localhost:h2port {
  #header_up Host {http.request.host}
  #header_up X-Real-IP {http.request.remote.host}
  #header_up X-Forwarded-For {http.request.remote.host}
  #header_up X-Forwarded-Port {http.request.port}
  #header_up X-Forwarded-Proto {http.request.scheme}
  transport http {
    #tls
    #tls_insecure_skip_verify
    versions h2c 2
  }
}

v2ray client stdout

V2Ray 4.26.0 (V2Fly, a community-driven edition of V2Ray.) Custom (go1.14.4 windows/amd64)
A unified platform for anti-censorship.
2020/07/28 20:51:43 Using default config:  <censored>\v2ray\config.json
2020/07/28 20:51:43 [Info] v2ray.com/core/common/platform/ctlcmd: <v2ctl message>
v2ctl> Read config:  <censored>\v2ray\config.json
2020/07/28 20:51:44 [Warning] v2ray.com/core: V2Ray 4.26.0 started
2020/07/28 20:51:46 tcp:127.0.0.1:4375 accepted tcp:ip.sb:443 [Proxy]
2020/07/28 20:51:47 tcp:127.0.0.1:4377 accepted tcp:push.services.mozilla.com:443 [Proxy]
2020/07/28 20:51:47 [Warning] [432679854] v2ray.com/core/app/proxyman/outbound: failed to process outbound traffic > v2ray.com/core/proxy/vmess/outbound: connection ends > v2ray.com/core/proxy/vmess/outbound: failed to read header > v2ray.com/core/proxy/vmess/encoding: failed to read response header > EOF
2020/07/28 20:51:47 [Warning] [2050222500] v2ray.com/core/app/proxyman/outbound: failed to process outbound traffic > v2ray.com/core/proxy/vmess/outbound: connection ends > v2ray.com/core/proxy/vmess/outbound: failed to read header > v2ray.com/core/proxy/vmess/encoding: failed to read response header > EOF

v2ray_client.json

{
  "log": {
    "loglevel": "warning"
  },
  "dns": {
    "hosts": {
      "dns.google": "8.8.8.8"
    },
    "servers": [
      {
        "address": "https://1.1.1.1/dns-query",
        "domains": [
          "geosite:geolocation-!cn"
        ]
      },
      "https://1.1.1.1/dns-query",
      "https://dns.google/dns-query",
      {
        "address": "114.114.114.114",
        "port": 53,
        "domains": [
          "geosite:cn"
        ],
        "expectIPs": [
          "geoip:cn"
        ]
      }
    ]
  },
  "inbounds": [
    {
      "protocol": "socks",
      "listen": "127.0.0.1",
      "port": 1080,
      "tag": "Socks-In",
      "settings": {
        "ip": "127.0.0.1",
        "udp": true,
        "auth": "noauth"
      },
      "sniffing": {
        "enabled": true,
        "destOverride": [
          "http",
          "tls"
        ]
      }
    },
    {
      "protocol": "http",
      "listen": "127.0.0.1",
      "port": 2080,
      "tag": "Http-In",
      "sniffing": {
        "enabled": true,
        "destOverride": [
          "http",
          "tls"
        ]
      }
    }
  ],
  "outbounds": [
    {
      "protocol": "vmess",
      "settings": {
        "vnext": [
          {
            "address": "domain",
            "port": 443,
            "users": [
              {
                "id": "h2_id",
                "alterId": 64
              }
            ]
          }
        ]
      },
      "streamSettings": {
        "network": "h2",
        "httpSettings": {
          "path": "/h2path"
        },
        "security": "tls"
      },
      "tag": "Proxy"
    },
    {
      "protocol": "dns",
      "tag": "Dns-Out"
    },
    {
      "protocol": "freedom",
      "tag": "Direct",
      "settings": {
        "domainStrategy": "UseIPv4"
      }
    },
    {
      "protocol": "blackhole",
      "tag": "Reject",
      "settings": {
        "response": {
          "type": "http"
        }
      }
    }
  ],
  "routing": {
    "domainStrategy": "AsIs",
    "rules": [
      {
        "type": "field",
        "outboundTag": "Direct",
        "protocol": [
          "bittorrent"
        ]
      },
      {
        "type": "field",
        "outboundTag": "Dns-Out",
        "inboundTag": [
          "Socks-In",
          "Http-In"
        ],
        "network": "udp",
        "port": 53
      },
      {
        "type": "field",
        "outboundTag": "Direct",
        "domain": [
          "geosite:tld-cn",
          "geosite:apple-cn",
          "geosite:google-cn",
          "geosite:tld-cn",
          "domain:icloud.com",
          "domain:icloud-content.com"
        ]
      },
      {
        "type": "field",
        "outboundTag": "Proxy",
        "domain": [
          "geosite:geolocation-!cn"
        ]
      },
      {
        "type": "field",
        "outboundTag": "Direct",
        "domain": [
          "geosite:cn"
        ]
      },
      {
        "type": "field",
        "outboundTag": "Direct",
        "ip": [
          "223.5.5.5/32",
          "119.29.29.29/32",
          "180.76.76.76/32",
          "114.114.114.114/32"
        ]
      },
      {
        "type": "field",
        "outboundTag": "Proxy",
        "ip": [
          "1.1.1.1/32",
          "1.0.0.1/32",
          "8.8.8.8/32",
          "8.8.4.4/32"
        ]
      },
      {
        "type": "field",
        "outboundTag": "Direct",
        "ip": [
          "geoip:cn",
          "geoip:private"
        ]
      },
      {
        "type": "field",
        "outboundTag": "Proxy",
        "network": "tcp,udp"
      }
    ]
  }
}

v2ray_server.json

{
  "log": {
    "loglevel": "warning",
    "access": "/var/log/v2ray/access.log",
    "error": "/var/log/v2ray/error.log"
  },
  "inbounds": [
    {
      "port": "wsport",
      "listen": "127.0.0.1",
      "protocol": "vmess",
      "settings": {
        "clients": [
          {
            "id": "ws_id",
            "alterId": 64
          }
        ]
      },
      "streamSettings": {
        "network": "ws",
        "wsSettings": {
          "path": "/wspath"
        }
      }
    },
    {
      "port": "h2port",
      "listen": "127.0.0.1",
      "protocol": "vmess",
      "settings": {
        "clients": [
          {
            "id": "h2_id",
            "alterId": 64
          }
        ]
      },
      "streamSettings": {
        "network": "h2",
        "security": "none",
        "httpSettings": {
          "path": "/h2path",
          "host": [
            "domain"
          ]
        }
      }
    }
  ],
  "outbounds": [
    {
      "protocol": "freedom",
      "settings": {}
    }
  ]
}