I'm going to reverse proxies HTTP to backend with proxy protocol for websocket with special path, but it seems http.matchers in caddy-l4 does not work even I just write one http match, here is my configuration:
Caddyfile.json
{"level":"warn","ts":1631097143.2176166,"logger":"admin","msg":"admin endpoint disabled"}
{"level":"info","ts":1631097143.2184045,"logger":"http","msg":"server is listening only on the HTTP port, so no automatic HTTPS will be applied to this server","server_name":"http0","http_port":80}
{"level":"info","ts":1631097143.2245347,"logger":"tls.cache.maintenance","msg":"started background certificate maintenance","cache":"0xc000393030"}
{"level":"debug","ts":1631097143.2974496,"logger":"layer4","msg":"listening","address":"tcp/[::]:443"}
{"level":"debug","ts":1631097143.3084638,"logger":"tls.cache","msg":"added certificate to cache","subjects":["mydomain.com"],"expiration":1638662399,"managed":true,"issuer_key":"acme.zerossl.com-v2-DV90","hash":"hashcode"}
{"level":"debug","ts":1631097143.3085592,"logger":"http","msg":"starting server loop","address":"[::]:80","http3":false,"tls":false}
{"level":"debug","ts":1631097143.3086965,"logger":"http","msg":"starting server loop","address":"127.0.0.1:8000","http3":false,"tls":false}
{"level":"info","ts":1631097143.3086019,"logger":"tls","msg":"cleaning storage unit","description":"FileStorage:/var/lib/caddy/.local/share/caddy"}
{"level":"info","ts":1631097143.3092394,"logger":"tls","msg":"finished cleaning storage units"}
{"level":"info","ts":1631097143.3093457,"msg":"autosaved config (load with --resume flag)","file":"/var/lib/caddy/.config/caddy/autosave.json"}
{"level":"info","ts":1631097143.3116603,"msg":"serving initial configuration"}
{"level":"info","ts":1631097143.3117192,"logger":"watcher","msg":"watching config file for changes","config_file":"/etc/caddy/Caddyfile.json"}
{"level":"debug","ts":1631097427.6923897,"logger":"tls.handshake","msg":"choosing certificate","identifier":"mydomain.com","num_choices":1}
{"level":"debug","ts":1631097427.6924815,"logger":"tls.handshake","msg":"default certificate selection results","identifier":"mydomain.com","subjects":["mydomain.com"],"managed":true,"issuer_key":"acme.zerossl.com-v2-DV90","hash":"hashcode"}
{"level":"debug","ts":1631097427.6924927,"logger":"tls.handshake","msg":"matched certificate in cache","subjects":["mydomain.com"],"managed":true,"expiration":1638662399,"hash":"hashcode"}
{"level":"debug","ts":1631097427.8528264,"logger":"layer4.handlers.tls","msg":"terminated TLS","remote":"IPIP:30464","server_name":"mydomain.com"}
{"level":"debug","ts":1631097427.8530192,"logger":"layer4.handlers.proxy","msg":"dial upstream","remote":"IPIP:30464","upstream":"127.0.0.1:8000"}
{"level":"debug","ts":1631097427.853516,"logger":"http.handlers.file_server","msg":"sanitized path join","site_root":"/var/home","request_path":"/8002","result":"/var/home/8002"}
{"level":"debug","ts":1631097427.8536227,"logger":"http.handlers.rewrite","msg":"rewrote request","request":{"remote_addr":"IPIP:30464","proto":"HTTP/1.1","method":"GET","host":"mydomain.com","uri":"/8002","headers":{"Upgrade":["websocket"],"Cf-Visitor":["{\"scheme\":\"https\"}"],"Cf-Worker":["cf.workers.dev"],"Connection":["Upgrade"],"Accept-Encoding":["gzip"],"X-Forwarded-Proto":["https"],"Cf-Connecting-Ip":["IPIP"],"X-Forwarded-For":["IPIP"],"Cf-Ray":["68b78a29579eebd5-LAX"],"Sec-Websocket-Key":["go4E7uifiXyQGsqbXISc8w=="],"Sec-Websocket-Version":["13"],"Cf-Ew-Via":["15"],"Cdn-Loop":["cloudflare; subreqs=1"],"User-Agent":["Go-http-client/1.1"]}},"method":"GET","uri":"/index.html"}
{"level":"debug","ts":1631097427.8536372,"logger":"http.handlers.file_server","msg":"sanitized path join","site_root":"/var/home","request_path":"/index.html","result":"/var/home/index.html"}
{"level":"debug","ts":1631097427.8536615,"logger":"http.handlers.file_server","msg":"opening file","filename":"/var/home/index.html"}
{"level":"debug","ts":1631097496.7244058,"logger":"tls.handshake","msg":"choosing certificate","identifier":"mydomain.com","num_choices":1}
{"level":"debug","ts":1631097496.7245393,"logger":"tls.handshake","msg":"default certificate selection results","identifier":"mydomain.com","subjects":["mydomain.com"],"managed":true,"issuer_key":"acme.zerossl.com-v2-DV90","hash":"hashcode"}
{"level":"debug","ts":1631097496.7245498,"logger":"tls.handshake","msg":"matched certificate in cache","subjects":["mydomain.com"],"managed":true,"expiration":1638662399,"hash":"hashcode"}
{"level":"debug","ts":1631097497.1746256,"logger":"layer4.handlers.tls","msg":"terminated TLS","remote":"IPIP:51993","server_name":"mydomain.com"}
{"level":"debug","ts":1631097497.1747851,"logger":"layer4.handlers.proxy","msg":"dial upstream","remote":"IPIP:51993","upstream":"127.0.0.1:8000"}
{"level":"debug","ts":1631097497.1765633,"logger":"http.handlers.file_server","msg":"sanitized path join","site_root":"/var/home","request_path":"/8001","result":"/var/home/8001"}
{"level":"debug","ts":1631097497.176639,"logger":"http.handlers.rewrite","msg":"rewrote request","request":{"remote_addr":"IPIP:51993","proto":"HTTP/1.1","method":"GET","host":"mydomain.com","uri":"/8001","headers":{"User-Agent":["Go-http-client/1.1"],"Connection":["Upgrade"],"Sec-Websocket-Key":["websocket.key"],"Sec-Websocket-Version":["13"],"Upgrade":["websocket"]}},"method":"GET","uri":"/index.html"}
{"level":"debug","ts":1631097497.1766522,"logger":"http.handlers.file_server","msg":"sanitized path join","site_root":"/var/home","request_path":"/index.html","result":"/var/home/index.html"}
{"level":"debug","ts":1631097497.1766653,"logger":"http.handlers.file_server","msg":"opening file","filename":"/var/home/index.html"}
{"level":"debug","ts":1631097497.5578418,"logger":"layer4","msg":"connection stats","remote":"IPIP:51993","read":594,"written":10899,"duration":0.834689686}
{"level":"debug","ts":1631097498.0101454,"logger":"tls.handshake","msg":"choosing certificate","identifier":"mydomain.com","num_choices":1}
{"level":"debug","ts":1631097498.0102103,"logger":"tls.handshake","msg":"default certificate selection results","identifier":"mydomain.com","subjects":["mydomain.com"],"managed":true,"issuer_key":"acme.zerossl.com-v2-DV90","hash":"hashcode"}
{"level":"debug","ts":1631097498.0102196,"logger":"tls.handshake","msg":"matched certificate in cache","subjects":["mydomain.com"],"managed":true,"expiration":1638662399,"hash":"hashcode"}
{"level":"debug","ts":1631097498.4510102,"logger":"layer4.handlers.tls","msg":"terminated TLS","remote":"IPIP:51994","server_name":"mydomain.com"}
{"level":"debug","ts":1631097498.4511786,"logger":"layer4.handlers.proxy","msg":"dial upstream","remote":"IPIP:51994","upstream":"127.0.0.1:8000"}
{"level":"debug","ts":1631097498.4514956,"logger":"http.handlers.file_server","msg":"sanitized path join","site_root":"/var/home","request_path":"/8001","result":"/var/home/8001"}
{"level":"debug","ts":1631097498.4515553,"logger":"http.handlers.rewrite","msg":"rewrote request","request":{"remote_addr":"IPIP:51994","proto":"HTTP/1.1","method":"GET","host":"mydomain.com","uri":"/8001","headers":{"User-Agent":["Go-http-client/1.1"],"Connection":["Upgrade"],"Sec-Websocket-Key":["websocket.key"],"Sec-Websocket-Version":["13"],"Upgrade":["websocket"]}},"method":"GET","uri":"/index.html"}
{"level":"debug","ts":1631097498.4515758,"logger":"http.handlers.file_server","msg":"sanitized path join","site_root":"/var/home","request_path":"/index.html","result":"/var/home/index.html"}
{"level":"debug","ts":1631097498.451593,"logger":"http.handlers.file_server","msg":"opening file","filename":"/var/home/index.html"}
{"level":"debug","ts":1631097498.8536725,"logger":"layer4","msg":"connection stats","remote":"IPIP:51994","read":594,"written":10898,"duration":0.845920969}
{"level":"debug","ts":1631097499.993334,"logger":"tls.handshake","msg":"choosing certificate","identifier":"mydomain.com","num_choices":1}
{"level":"debug","ts":1631097499.99341,"logger":"tls.handshake","msg":"default certificate selection results","identifier":"mydomain.com","subjects":["mydomain.com"],"managed":true,"issuer_key":"acme.zerossl.com-v2-DV90","hash":"hashcode"}
{"level":"debug","ts":1631097499.99342,"logger":"tls.handshake","msg":"matched certificate in cache","subjects":["mydomain.com"],"managed":true,"expiration":1638662399,"hash":"hashcode"}
{"level":"debug","ts":1631097500.4150765,"logger":"layer4.handlers.tls","msg":"terminated TLS","remote":"IPIP:51996","server_name":"mydomain.com"}
{"level":"debug","ts":1631097500.4152358,"logger":"layer4.handlers.proxy","msg":"dial upstream","remote":"IPIP:51996","upstream":"127.0.0.1:8000"}
{"level":"debug","ts":1631097500.42214,"logger":"http.handlers.file_server","msg":"sanitized path join","site_root":"/var/home","request_path":"/8001","result":"/var/home/8001"}
{"level":"debug","ts":1631097500.422234,"logger":"http.handlers.rewrite","msg":"rewrote request","request":{"remote_addr":"IPIP:51996","proto":"HTTP/1.1","method":"GET","host":"mydomain.com","uri":"/8001","headers":{"User-Agent":["Go-http-client/1.1"],"Connection":["Upgrade"],"Sec-Websocket-Key":["kfmeD0dquEhvaEy1m7aemw=="],"Sec-Websocket-Version":["13"],"Upgrade":["websocket"]}},"method":"GET","uri":"/index.html"}
{"level":"debug","ts":1631097500.4222484,"logger":"http.handlers.file_server","msg":"sanitized path join","site_root":"/var/home","request_path":"/index.html","result":"/var/home/index.html"}
{"level":"debug","ts":1631097500.4222617,"logger":"http.handlers.file_server","msg":"opening file","filename":"/var/home/index.html"}
{"level":"debug","ts":1631097500.8077915,"logger":"layer4","msg":"connection stats","remote":"IPIP:51996","read":594,"written":10899,"duration":0.816859118}
{"level":"debug","ts":1631097501.7454286,"logger":"tls.handshake","msg":"choosing certificate","identifier":"mydomain.com","num_choices":1}
{"level":"debug","ts":1631097501.7455046,"logger":"tls.handshake","msg":"default certificate selection results","identifier":"mydomain.com","subjects":["mydomain.com"],"managed":true,"issuer_key":"acme.zerossl.com-v2-DV90","hash":"hashcode"}
{"level":"debug","ts":1631097501.7455142,"logger":"tls.handshake","msg":"matched certificate in cache","subjects":["mydomain.com"],"managed":true,"expiration":1638662399,"hash":"hashcode"}
{"level":"debug","ts":1631097502.1724303,"logger":"layer4.handlers.tls","msg":"terminated TLS","remote":"IPIP:51998","server_name":"mydomain.com"}
{"level":"debug","ts":1631097502.1726205,"logger":"layer4.handlers.proxy","msg":"dial upstream","remote":"IPIP:51998","upstream":"127.0.0.1:8000"}
{"level":"debug","ts":1631097502.1735847,"logger":"http.handlers.file_server","msg":"sanitized path join","site_root":"/var/home","request_path":"/8001","result":"/var/home/8001"}
{"level":"debug","ts":1631097502.1736438,"logger":"http.handlers.rewrite","msg":"rewrote request","request":{"remote_addr":"IPIP:51998","proto":"HTTP/1.1","method":"GET","host":"mydomain.com","uri":"/8001","headers":{"User-Agent":["Go-http-client/1.1"],"Connection":["Upgrade"],"Sec-Websocket-Key":["+c3aYixUa0vkLlk9uQjvpA=="],"Sec-Websocket-Version":["13"],"Upgrade":["websocket"]}},"method":"GET","uri":"/index.html"}
{"level":"debug","ts":1631097502.1736562,"logger":"http.handlers.file_server","msg":"sanitized path join","site_root":"/var/home","request_path":"/index.html","result":"/var/home/index.html"}
{"level":"debug","ts":1631097502.1736805,"logger":"http.handlers.file_server","msg":"opening file","filename":"/var/home/index.html"}
{"level":"debug","ts":1631097502.5579233,"logger":"layer4","msg":"connection stats","remote":"IPIP:51998","read":594,"written":10899,"duration":0.813359319}
{"level":"debug","ts":1631097503.5637326,"logger":"tls.handshake","msg":"choosing certificate","identifier":"mydomain.com","num_choices":1}
{"level":"debug","ts":1631097503.5637982,"logger":"tls.handshake","msg":"default certificate selection results","identifier":"mydomain.com","subjects":["mydomain.com"],"managed":true,"issuer_key":"acme.zerossl.com-v2-DV90","hash":"hashcode"}
{"level":"debug","ts":1631097503.5638072,"logger":"tls.handshake","msg":"matched certificate in cache","subjects":["mydomain.com"],"managed":true,"expiration":1638662399,"hash":"hashcode"}
{"level":"debug","ts":1631097503.9857993,"logger":"layer4.handlers.tls","msg":"terminated TLS","remote":"IPIP:52000","server_name":"mydomain.com"}
{"level":"debug","ts":1631097503.985975,"logger":"layer4.handlers.proxy","msg":"dial upstream","remote":"IPIP:52000","upstream":"127.0.0.1:8000"}
{"level":"debug","ts":1631097503.986999,"logger":"http.handlers.file_server","msg":"sanitized path join","site_root":"/var/home","request_path":"/8001","result":"/var/home/8001"}
{"level":"debug","ts":1631097503.9870715,"logger":"http.handlers.rewrite","msg":"rewrote request","request":{"remote_addr":"IPIP:52000","proto":"HTTP/1.1","method":"GET","host":"mydomain.com","uri":"/8001","headers":{"Sec-Websocket-Version":["13"],"Upgrade":["websocket"],"User-Agent":["Go-http-client/1.1"],"Connection":["Upgrade"],"Sec-Websocket-Key":["zG//cFwo7T/aWeonWGSunw=="]}},"method":"GET","uri":"/index.html"}
{"level":"debug","ts":1631097503.9870846,"logger":"http.handlers.file_server","msg":"sanitized path join","site_root":"/var/home","request_path":"/index.html","result":"/var/home/index.html"}
{"level":"debug","ts":1631097503.9870977,"logger":"http.handlers.file_server","msg":"opening file","filename":"/var/home/index.html"}
{"level":"debug","ts":1631097504.3665636,"logger":"layer4","msg":"connection stats","remote":"IPIP:52000","read":594,"written":10899,"duration":0.809525412}
{"level":"debug","ts":1631097509.3183365,"logger":"tls.handshake","msg":"choosing certificate","identifier":"mydomain.com","num_choices":1}
{"level":"debug","ts":1631097509.3184264,"logger":"tls.handshake","msg":"default certificate selection results","identifier":"mydomain.com","subjects":["mydomain.com"],"managed":true,"issuer_key":"acme.zerossl.com-v2-DV90","hash":"hashcode"}
{"level":"debug","ts":1631097509.3184366,"logger":"tls.handshake","msg":"matched certificate in cache","subjects":["mydomain.com"],"managed":true,"expiration":1638662399,"hash":"hashcode"}
{"level":"debug","ts":1631097509.7621365,"logger":"layer4.handlers.tls","msg":"terminated TLS","remote":"IPIP:52006","server_name":"mydomain.com"}
{"level":"debug","ts":1631097509.7623522,"logger":"layer4.handlers.proxy","msg":"dial upstream","remote":"IPIP:52006","upstream":"127.0.0.1:8000"}
{"level":"debug","ts":1631097509.7633018,"logger":"http.handlers.file_server","msg":"sanitized path join","site_root":"/var/home","request_path":"/8002","result":"/var/home/8002"}
{"level":"debug","ts":1631097509.7633681,"logger":"http.handlers.rewrite","msg":"rewrote request","request":{"remote_addr":"IPIP:52006","proto":"HTTP/1.1","method":"GET","host":"mydomain.com","uri":"/8002","headers":{"User-Agent":["Go-http-client/1.1"],"Connection":["Upgrade"],"Sec-Websocket-Key":["NhGjlsHMA838N3IUhstn2A=="],"Sec-Websocket-Version":["13"],"Upgrade":["websocket"]}},"method":"GET","uri":"/index.html"}
{"level":"debug","ts":1631097509.7633922,"logger":"http.handlers.file_server","msg":"sanitized path join","site_root":"/var/home","request_path":"/index.html","result":"/var/home/index.html"}
{"level":"debug","ts":1631097509.7634058,"logger":"http.handlers.file_server","msg":"opening file","filename":"/var/home/index.html"}
{"level":"debug","ts":1631097510.1364229,"logger":"layer4","msg":"connection stats","remote":"IPIP:52006","read":594,"written":10900,"duration":0.825733884}
{"level":"debug","ts":1631097510.5461917,"logger":"tls.handshake","msg":"choosing certificate","identifier":"mydomain.com","num_choices":1}
{"level":"debug","ts":1631097510.5462697,"logger":"tls.handshake","msg":"default certificate selection results","identifier":"mydomain.com","subjects":["mydomain.com"],"managed":true,"issuer_key":"acme.zerossl.com-v2-DV90","hash":"hashcode"}
{"level":"debug","ts":1631097510.5462794,"logger":"tls.handshake","msg":"matched certificate in cache","subjects":["mydomain.com"],"managed":true,"expiration":1638662399,"hash":"hashcode"}
{"level":"debug","ts":1631097510.9690325,"logger":"layer4.handlers.tls","msg":"terminated TLS","remote":"IPIP:52007","server_name":"mydomain.com"}
{"level":"debug","ts":1631097510.969252,"logger":"layer4.handlers.proxy","msg":"dial upstream","remote":"IPIP:52007","upstream":"127.0.0.1:8000"}
{"level":"debug","ts":1631097510.9702334,"logger":"http.handlers.file_server","msg":"sanitized path join","site_root":"/var/home","request_path":"/8002","result":"/var/home/8002"}
{"level":"debug","ts":1631097510.970295,"logger":"http.handlers.rewrite","msg":"rewrote request","request":{"remote_addr":"IPIP:52007","proto":"HTTP/1.1","method":"GET","host":"mydomain.com","uri":"/8002","headers":{"User-Agent":["Go-http-client/1.1"],"Connection":["Upgrade"],"Sec-Websocket-Key":["5j++1JTZbNd/nDnUR1Rh/w=="],"Sec-Websocket-Version":["13"],"Upgrade":["websocket"]}},"method":"GET","uri":"/index.html"}
{"level":"debug","ts":1631097510.9703076,"logger":"http.handlers.file_server","msg":"sanitized path join","site_root":"/var/home","request_path":"/index.html","result":"/var/home/index.html"}
{"level":"debug","ts":1631097510.9703207,"logger":"http.handlers.file_server","msg":"opening file","filename":"/var/home/index.html"}
{"level":"debug","ts":1631097511.2072554,"logger":"tls.handshake","msg":"choosing certificate","identifier":"mydomain.com","num_choices":1}
{"level":"debug","ts":1631097511.2073295,"logger":"tls.handshake","msg":"default certificate selection results","identifier":"mydomain.com","subjects":["mydomain.com"],"managed":true,"issuer_key":"acme.zerossl.com-v2-DV90","hash":"hashcode"}
{"level":"debug","ts":1631097511.2073395,"logger":"tls.handshake","msg":"matched certificate in cache","subjects":["mydomain.com"],"managed":true,"expiration":1638662399,"hash":"hashcode"}
{"level":"debug","ts":1631097511.353876,"logger":"layer4","msg":"connection stats","remote":"IPIP:52007","read":594,"written":10900,"duration":0.814580101}
{"level":"debug","ts":1631097511.3665795,"logger":"layer4.handlers.tls","msg":"terminated TLS","remote":"IPIP:37004","server_name":"mydomain.com"}
{"level":"debug","ts":1631097511.366737,"logger":"layer4.handlers.proxy","msg":"dial upstream","remote":"IPIP:37004","upstream":"127.0.0.1:8000"}
{"level":"debug","ts":1631097511.367178,"logger":"http.handlers.file_server","msg":"sanitized path join","site_root":"/var/home","request_path":"/8002","result":"/var/home/8002"}
{"level":"debug","ts":1631097511.3672657,"logger":"http.handlers.rewrite","msg":"rewrote request","request":{"remote_addr":"IPIP:37004","proto":"HTTP/1.1","method":"GET","host":"mydomain.com","uri":"/8002","headers":{"Sec-Websocket-Version":["13"],"Cf-Connecting-Ip":["IPIP"],"Cf-Worker":["cf.workers.dev"],"Accept-Encoding":["gzip"],"X-Forwarded-For":["IPIP"],"Cf-Ray":["68b78c3382f6eb41-LAX"],"X-Forwarded-Proto":["https"],"Connection":["Upgrade"],"Sec-Websocket-Key":["2soWKtUR1wZITQvbXmLfpQ=="],"Cf-Ew-Via":["15"],"Cdn-Loop":["cloudflare; subreqs=1"],"Upgrade":["websocket"],"Cf-Visitor":["{\"scheme\":\"https\"}"],"User-Agent":["Go-http-client/1.1"]}},"method":"GET","uri":"/index.html"}
{"level":"debug","ts":1631097511.3673146,"logger":"http.handlers.file_server","msg":"sanitized path join","site_root":"/var/home","request_path":"/index.html","result":"/var/home/index.html"}
{"level":"debug","ts":1631097511.3673325,"logger":"http.handlers.file_server","msg":"opening file","filename":"/var/home/index.html"}
{"level":"debug","ts":1631097512.3475347,"logger":"tls.handshake","msg":"choosing certificate","identifier":"mydomain.com","num_choices":1}
{"level":"debug","ts":1631097512.347602,"logger":"tls.handshake","msg":"default certificate selection results","identifier":"mydomain.com","subjects":["mydomain.com"],"managed":true,"issuer_key":"acme.zerossl.com-v2-DV90","hash":"hashcode"}
{"level":"debug","ts":1631097512.3476114,"logger":"tls.handshake","msg":"matched certificate in cache","subjects":["mydomain.com"],"managed":true,"expiration":1638662399,"hash":"hashcode"}
{"level":"debug","ts":1631097512.7838993,"logger":"layer4.handlers.tls","msg":"terminated TLS","remote":"IPIP:52015","server_name":"mydomain.com"}
{"level":"debug","ts":1631097512.784145,"logger":"layer4.handlers.proxy","msg":"dial upstream","remote":"IPIP:52015","upstream":"127.0.0.1:8000"}
{"level":"debug","ts":1631097512.7851133,"logger":"http.handlers.file_server","msg":"sanitized path join","site_root":"/var/home","request_path":"/8002","result":"/var/home/8002"}
{"level":"debug","ts":1631097512.7851973,"logger":"http.handlers.rewrite","msg":"rewrote request","request":{"remote_addr":"IPIP:52015","proto":"HTTP/1.1","method":"GET","host":"mydomain.com","uri":"/8002","headers":{"Sec-Websocket-Key":["qpb+rkDSXTYfjAmisOUt6g=="],"Sec-Websocket-Version":["13"],"Upgrade":["websocket"],"User-Agent":["Go-http-client/1.1"],"Connection":["Upgrade"]}},"method":"GET","uri":"/index.html"}
{"level":"debug","ts":1631097512.7852116,"logger":"http.handlers.file_server","msg":"sanitized path join","site_root":"/var/home","request_path":"/index.html","result":"/var/home/index.html"}
{"level":"debug","ts":1631097512.7852252,"logger":"http.handlers.file_server","msg":"opening file","filename":"/var/home/index.html"}
{"level":"debug","ts":1631097512.8735797,"logger":"tls.handshake","msg":"choosing certificate","identifier":"mydomain.com","num_choices":1}
{"level":"debug","ts":1631097512.873662,"logger":"tls.handshake","msg":"default certificate selection results","identifier":"mydomain.com","subjects":["mydomain.com"],"managed":true,"issuer_key":"acme.zerossl.com-v2-DV90","hash":"hashcode"}
{"level":"debug","ts":1631097512.8736732,"logger":"tls.handshake","msg":"matched certificate in cache","subjects":["mydomain.com"],"managed":true,"expiration":1638662399,"hash":"hashcode"}
{"level":"debug","ts":1631097513.0358064,"logger":"layer4.handlers.tls","msg":"terminated TLS","remote":"IPIP:39534","server_name":"mydomain.com"}
{"level":"debug","ts":1631097513.0360348,"logger":"layer4.handlers.proxy","msg":"dial upstream","remote":"IPIP:39534","upstream":"127.0.0.1:8000"}
{"level":"debug","ts":1631097513.0364077,"logger":"http.handlers.file_server","msg":"sanitized path join","site_root":"/var/home","request_path":"/8002","result":"/var/home/8002"}
{"level":"debug","ts":1631097513.0365279,"logger":"http.handlers.rewrite","msg":"rewrote request","request":{"remote_addr":"IPIP:39534","proto":"HTTP/1.1","method":"GET","host":"mydomain.com","uri":"/8002","headers":{"X-Forwarded-For":["IPIP"],"Cf-Visitor":["{\"scheme\":\"https\"}"],"Sec-Websocket-Key":["Bqxw7rNH9YZLO8Jis87Kdw=="],"Sec-Websocket-Version":["13"],"Upgrade":["websocket"],"Cf-Ew-Via":["15"],"User-Agent":["Go-http-client/1.1"],"Connection":["Upgrade"],"Cf-Ray":["68b78c3de60c368c-LAX"],"Cdn-Loop":["cloudflare; subreqs=1"],"Cf-Worker":["cf.workers.dev"],"Accept-Encoding":["gzip"],"X-Forwarded-Proto":["https"],"Cf-Connecting-Ip":["IPIP"]}},"method":"GET","uri":"/index.html"}
{"level":"debug","ts":1631097513.036576,"logger":"http.handlers.file_server","msg":"sanitized path join","site_root":"/var/home","request_path":"/index.html","result":"/var/home/index.html"}
{"level":"debug","ts":1631097513.0365932,"logger":"http.handlers.file_server","msg":"opening file","filename":"/var/home/index.html"}
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{"level":"error","ts":1631097515.5760002,"logger":"http.log.access.log1","msg":"handled request","request":{"remote_addr":"IPIP:42954","proto":"HTTP/1.1","method":"GET","host":"mydomain.com","uri":"/8002","headers":{"Cf-Worker":["cf.workers.dev"],"X-Forwarded-Proto":["https"],"User-Agent":["Go-http-client/1.1"],"Cf-Connecting-Ip":["IPIP"],"Sec-Websocket-Version":["13"],"Cf-Ew-Via":["15"],"Connection":["Upgrade"],"Cf-Ray":["68b78c4de7660cdf-LAX"],"Accept-Encoding":["gzip"],"Cf-Visitor":["{\"scheme\":\"https\"}"],"Sec-Websocket-Key":["dNUNBjJFHEYkFHVTDYq/rQ=="],"Upgrade":["websocket"],"X-Forwarded-For":["IPIP"],"Cdn-Loop":["cloudflare; subreqs=1"]}},"common_log":"IPIP - - [08/Sep/2021:18:38:35 +0800] \"GET /8002 HTTP/1.1\" 404 6735","user_id":"","duration":0.00013804,"size":6735,"status":404,"resp_headers":{"X-Content-Type-Options":["nosniff"],"X-Robots-Tag":["noindex, nofollow, noarchive, nosnippet, notranslate, noimageindex"],"Etag":["\"qb3qt3573\""],"Content-Length":["6735"],"Server":["Caddy"],"X-Frame-Options":["SAMEORIGIN"],"Content-Type":["text/html; charset=utf-8"],"Last-Modified":["Fri, 29 May 2020 16:51:03 GMT"],"Accept-Ranges":["bytes"],"Strict-Transport-Security":["max-age=31536000; includeSubDomains; preload"]}}
{"level":"error","ts":1631097516.2776096,"logger":"http.log.access.log1","msg":"handled request","request":{"remote_addr":"IPIP:52025","proto":"HTTP/1.1","method":"GET","host":"mydomain.com","uri":"/8002","headers":{"Sec-Websocket-Key":["5r7xARBahO4LJCEuiC5hNw=="],"Sec-Websocket-Version":["13"],"Upgrade":["websocket"],"User-Agent":["Go-http-client/1.1"],"Connection":["Upgrade"]}},"common_log":"IPIP - - [08/Sep/2021:18:38:36 +0800] \"GET /8002 HTTP/1.1\" 404 6735","user_id":"","duration":0.000155954,"size":6735,"status":404,"resp_headers":{"Last-Modified":["Fri, 29 May 2020 16:51:03 GMT"],"Strict-Transport-Security":["max-age=31536000; includeSubDomains; preload"],"X-Content-Type-Options":["nosniff"],"X-Frame-Options":["SAMEORIGIN"],"X-Robots-Tag":["noindex, nofollow, noarchive, nosnippet, notranslate, noimageindex"],"Etag":["\"qb3qt3573\""],"Content-Type":["text/html; charset=utf-8"],"Accept-Ranges":["bytes"],"Content-Length":["6735"],"Server":["Caddy"]}}
{"level":"info","ts":1631097525.420356,"logger":"http.log.access.log1","msg":"handled request","request":{"remote_addr":"IPIP:52032","proto":"HTTP/1.1","method":"GET","host":"mydomain.com","uri":"/8003","headers":{"Sec-Websocket-Version":["13"],"Upgrade":["websocket"],"User-Agent":["Go-http-client/1.1"],"Connection":["Upgrade"],"Sec-Websocket-Key":["ly9zzRiaY5iYa7Ec0bCnMA=="]}},"common_log":"IPIP - - [08/Sep/2021:18:38:45 +0800] \"GET /8003 HTTP/1.1\" 0 0","user_id":"","duration":4.478228997,"size":0,"status":0,"resp_headers":{"Sec-Websocket-Accept":["PIVfT3VFGVicvBMuIs9f/HSYILc="],"Server":["Caddy"],"Strict-Transport-Security":["max-age=31536000; includeSubDomains; preload"],"X-Content-Type-Options":["nosniff"],"X-Frame-Options":["SAMEORIGIN"],"X-Robots-Tag":["noindex, nofollow, noarchive, nosnippet, notranslate, noimageindex"],"Upgrade":["websocket"],"Connection":["Upgrade"]}}
{"level":"info","ts":1631097536.927871,"logger":"http.log.access.log1","msg":"handled request","request":{"remote_addr":"IPIP:52042","proto":"HTTP/1.1","method":"GET","host":"mydomain.com","uri":"/8004","headers":{"User-Agent":["Go-http-client/1.1"],"Connection":["Upgrade"],"Sec-Websocket-Key":["2mT4eE5OqTvCoXvaCari2Q=="],"Sec-Websocket-Version":["13"],"Upgrade":["websocket"]}},"common_log":"IPIP - - [08/Sep/2021:18:38:56 +0800] \"GET /8004 HTTP/1.1\" 0 0","user_id":"","duration":3.969616145,"size":0,"status":0,"resp_headers":{"Upgrade":["websocket"],"Connection":["Upgrade"],"Sec-Websocket-Accept":["u5cdlu5W2lnrWQLQtxD6Taq++O8="],"Server":["Caddy"],"Strict-Transport-Security":["max-age=31536000; includeSubDomains; preload"],"X-Content-Type-Options":["nosniff"],"X-Frame-Options":["SAMEORIGIN"],"X-Robots-Tag":["noindex, nofollow, noarchive, nosnippet, notranslate, noimageindex"]}}
It seems the http matchers does not work, all websocket connections and URI path goes 127.0.0.1:8000, so how can I forward websocket connections with special path to a certain upstream server ?