cloudflared-mirror/vendor/github.com/gobwas/ws/doc.go

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/*
Package ws implements a client and server for the WebSocket protocol as
specified in RFC 6455.
The main purpose of this package is to provide simple low-level API for
efficient work with protocol.
Overview.
Upgrade to WebSocket (or WebSocket handshake) can be done in two ways.
The first way is to use `net/http` server:
http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
conn, _, _, err := ws.UpgradeHTTP(r, w)
})
The second and much more efficient way is so-called "zero-copy upgrade". It
avoids redundant allocations and copying of not used headers or other request
data. User decides by himself which data should be copied.
ln, err := net.Listen("tcp", ":8080")
if err != nil {
// handle error
}
conn, err := ln.Accept()
if err != nil {
// handle error
}
handshake, err := ws.Upgrade(conn)
if err != nil {
// handle error
}
For customization details see `ws.Upgrader` documentation.
After WebSocket handshake you can work with connection in multiple ways.
That is, `ws` does not force the only one way of how to work with WebSocket:
header, err := ws.ReadHeader(conn)
if err != nil {
// handle err
}
buf := make([]byte, header.Length)
_, err := io.ReadFull(conn, buf)
if err != nil {
// handle err
}
resp := ws.NewBinaryFrame([]byte("hello, world!"))
if err := ws.WriteFrame(conn, frame); err != nil {
// handle err
}
As you can see, it stream friendly:
const N = 42
ws.WriteHeader(ws.Header{
Fin: true,
Length: N,
OpCode: ws.OpBinary,
})
io.CopyN(conn, rand.Reader, N)
Or:
header, err := ws.ReadHeader(conn)
if err != nil {
// handle err
}
io.CopyN(ioutil.Discard, conn, header.Length)
For more info see the documentation.
*/
package ws