なんとなくWebSocket APIの動作が思った通りにならなかったので、各種ブラウザのWebSocket接続リクエストのHeaderを調査しました。
このサイトではCookieを使ってないのでヘッダにCookieでてませんが、使っていれば普通にCookieが出力されます。
あと、Herokuのルータが付けてるヘッダ(x-forwarded-forなど)はカットしました。
★Chrome
cache-control: no-cache
connect-time: 4
connection: Upgrade
Content-Length: 0
Host: room-sandbox.herokuapp.com
origin: http://shunjikonishi.github.io
pragma: no-cache
sec-websocket-extensions: permessage-deflate; client_max_window_bits, x-webkit-deflate-frame
sec-websocket-key: (snip)
sec-websocket-version: 13
total-route-time: 1
upgrade: websocket
user-agent: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/35.0.1916.114 Safari/537.36
via: 1.1 vegur
★Firefox
accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
accept-encoding: gzip, deflate
accept-language: ja,en-us;q=0.7,en;q=0.3
cache-control: no-cache
connect-time: 2
connection: Upgrade
Content-Length: 0
Host: room-sandbox.herokuapp.com
origin: http://shunjikonishi.github.io
pragma: no-cache
sec-websocket-key: (snip)
sec-websocket-version: 13
total-route-time: 0
upgrade: websocket
user-agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:29.0) Gecko/20100101 Firefox/29.0
via: 1.1 vegur
★IE11
cache-control: no-cache
connect-time: 1
connection: Upgrade
Content-Length: 0
Host: room-sandbox.herokuapp.com
origin: http://shunjikonishi.github.io
sec-websocket-key: (snip)
sec-websocket-version: 13
total-route-time: 0
upgrade: Websocket
user-agent: Mozilla/5.0 (Windows NT 6.1; WOW64; Trident/7.0; rv:11.0) like Gecko
via: 1.1 vegur
★Mac Safari
cache-control: no-cache
connect-time: 1
connection: Upgrade
Content-Length: 0
Host: room-sandbox.herokuapp.com
origin: http://shunjikonishi.github.io
pragma: no-cache
sec-websocket-extensions: x-webkit-deflate-frame
sec-websocket-key: (snip)
sec-websocket-version: 13
total-route-time: 1
upgrade: websocket
user-agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_9_3) AppleWebKit/537.76.4 (KHTML, like Gecko) Version/7.0.4 Safari/537.76.4
via: 1.1 vegur
★Android
cache-control: no-cache
connect-time: 0
connection: Upgrade
Content-Length: 0
Host: room-sandbox.herokuapp.com
origin: http://shunjikonishi.github.io
pragma: no-cache
sec-websocket-extensions: permessage-deflate; client_max_window_bits, x-webkit-deflate-frame
sec-websocket-key: (snip)
sec-websocket-version: 13
total-route-time: 0
upgrade: websocket
user-agent: Mozilla/5.0 (Linux; Android 4.1.2; P-02E Build/JZO54K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/35.0.1916.141 Mobile Safari/537.36
via: 1.1 vegur
★iPad
cache-control: no-cache
connect-time: 0
connection: Upgrade
Content-Length: 0
Host: room-sandbox.herokuapp.com
origin: http://shunjikonishi.github.io
pragma: no-cache
sec-websocket-extensions: x-webkit-deflate-frame
sec-websocket-key: (snip)
sec-websocket-version: 13
total-route-time: 0
upgrade: websocket
user-agent: Mozilla/5.0 (iPad; CPU OS 7_1_1 like Mac OS X) AppleWebKit/537.51.2 (KHTML, like Gecko) Version/7.0 Mobile/11D201 Safari/9537.53
via: 1.1 vegur
□□□□
ほとんど余計なヘッダはついてないですね。
Firefox以外はAccept, Appcept-Encoding, Accept-Languageはついていません。
なるほど。確かにHTMLページを返すことを目的としたプロトコルではないので付ける必要ないですね。
納得いきました。