最近相对服务用apache代理访问，但是访问路径中有链接是webscket。
访问172.20.50.5:20081/transformer-substation-bff/v0/staff/cameras/1888807725912047811/live-stream是websocket。其余部分都是http。其中中间的数字是一个ID，会随访问不通而变化，但是都是websocket。

我想到了使用正则匹配来进行匹配，配置文件如下。:

	ProxyPassMatch "^/transformer-substation-bff/v0/staff/cameras/(.*)/live-stream"  "ws://172.20.50.5:20081/transformer-substation-bff/v0/staff/cameras/\$1/live-stream" 
         ProxyPassReverse "/transformer-substation-bff/v0/staff/cameras/(.*)/live-stream"  "ws://172.20.50.5:20081/transformer-substation-bff/v0/staff/cameras/\$1/live-stream"



  	ProxyPass /transformer-substation/ http://172.20.50.5:20080/transformer-substation/
  	ProxyPassReverse /transformer-substation/ http://172.20.50.5:20080/transformer-substation/
 
  	ProxyPass /transformer-substation-bff http://172.20.50.5:20081/transformer-substation-bff
  	ProxyPassReverse /transformer-substation-bff http://172.20.50.5:20081/transformer-substation-bff

但是上诉的配置文件没匹配上。准确的说是前面部分的(/*)捕获了，没被后面的\/$1捕获到。访问服务报错unmarshal text to *datatypes.SFID failed: strconv.ParseUint: parsing \\\"$1\\\": invalid syntax\",\"in\":\"path\"}]}\n","remote_ip":"172.20.10.136","request_uri":"/transformer-substation-bff/v0/staff/cameras/$1/live-stream?streamType=S1“

于是我尝试了重写：

    RewriteEngine On
    RewriteRule "^/transformer-substation-bff/v0/staff/cameras/(.*)/live-stream" "ws://172.20.50.5:20081/transformer-substation-bff/v0/staff/cameras/%1/live-stream" [P]

依旧不起作用。

于是我不用匹配：

	ProxyPass "/transformer-substation-bff/v0/staff/cameras/1888807725912047811/live-stream"  "ws://172.20.50.5:20081/transformer-substation-bff/v0/staff/cameras/1888807725912047811/live-stream"
    ProxyPassReverse "/transformer-substation-bff/v0/staff/cameras/1888807725912047811/live-stream"  "ws://172.20.50.5:20081/transformer-substation-bff/v0/staff/cameras/1888807725912047811/live-stream"


  	ProxyPass /transformer-substation/ http://172.20.50.5:20080/transformer-substation/
  	ProxyPassReverse /transformer-substation/ http://172.20.50.5:20080/transformer-substation/
 
  	ProxyPass /transformer-substation-bff http://172.20.50.5:20081/transformer-substation-bff
  	ProxyPassReverse /transformer-substation-bff http://172.20.50.5:20081/transformer-substation-bff

这样是可以正常代理到websocket的。

我找到了官方的文档，但是好像没有说这种中间部分匹配的应该怎么写：

https://httpd.apache.org/docs/2.4/mod/mod_proxy_wstunnel.html

我怎么样重写这个匹配规则，我才能正常代理这个中间需要匹配的websocket呢？