3.WebSocket URIs
This specification defines two URI schemes, using the ABNF syntax
defined in RFC 5234 [RFC5234], and terminology and ABNF productions
defined by the URI specification RFC 3986 [RFC3986].
本說明書定義了兩種格式的URI，一種是[RFC5234]定義的ABNF ，一種是 [RFC3986]中定義的術語和ABNF。
ws-URI = "ws:" "//" host [ ":" port ] path [ "?" query ]
wss-URI = "wss:" "//" host [ ":" port ] path [ "?" query ]
// 對上面格式的說明
host = <host, defined in [RFC3986], Section 3.2.2>
port = <port, defined in [RFC3986], Section 3.2.3>
path = <path-abempty, defined in [RFC3986], Section 3.3>
query = <query, defined in [RFC3986], Section 3.4>
The port component is OPTIONAL; the default for "ws" is port 80,
while the default for "wss" is port 443.
端口選項是可選的；“ws”的默認端口是80，“wss”的默認端口是443.
The URI is called "secure" (and it is said that "the secure flag is
set") if the scheme component matches "wss" case-insensitively.
假如URI與“wss”匹配（不區分大小寫），該URI就被稱之爲“安全的”（並且被稱之爲“安全標記已經設置”）。
The "resource-name" (also known as /resource name/ in Section 4.1)
can be constructed by concatenating the following:
o "/" if the path component is empty
o the path component
o "?" if the query component is non-empty
o the query component
“資源名”（同4.1節中的/資源名/）由以下部分組成：
- "/" 當路徑爲空的情況使用。
- 路徑。
- "?" 當查詢參數不爲空使用。
- 查詢參數。
Fragment identifiers are meaningless in the context of WebSocket URIs
and MUST NOT be used on these URIs. As with any URI scheme, the
character "#", when not indicating the start of a fragment, MUST be
escaped as %23.
在websocket的URI中，片段標識符是沒有含義的而且不應該被使用。就像其它URI一樣，當“#”不代表片段的開始時，必須轉換成“%23”。