forked from x/icebergs
62 lines
1.2 KiB
Go
62 lines
1.2 KiB
Go
package tcp
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import (
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"bytes"
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"net"
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"net/http"
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"strings"
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ice "shylinux.com/x/icebergs"
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kit "shylinux.com/x/toolkits"
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)
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const TCP = "tcp"
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var Index = &ice.Context{Name: TCP, Help: "通信模块"}
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func init() { ice.Index.Register(Index, nil, HOST, PORT, CLIENT, SERVER) }
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type Buf struct {
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buf []byte
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}
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type PeekConn struct {
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net.Conn
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*Buf
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}
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func (s PeekConn) Read(b []byte) (n int, err error) {
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if len(s.buf) == 0 {
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return s.Conn.Read(b)
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}
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if len(s.buf) < len(b) {
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copy(b, s.buf)
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s.buf = s.buf[:0]
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return len(s.buf), nil
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}
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copy(b, s.buf)
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s.buf = s.buf[len(b):]
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return len(b), nil
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}
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func (s PeekConn) Peek(n int) (res []byte) {
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b := make([]byte, n)
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_n, _ := s.Conn.Read(b)
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s.Buf.buf = b[:_n]
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return b[:_n]
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}
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func (s PeekConn) IsHTTP() bool {
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if bytes.Equal(s.Peek(4), []byte("GET ")) {
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return true
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}
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return false
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}
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func (s PeekConn) Redirect(status int, location string) {
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DF, NL := ": ", "\r\n"
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s.Conn.Write([]byte(strings.Join([]string{
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kit.Format("HTTP/1.1 %d %s", status, http.StatusText(status)), kit.JoinKV(DF, NL,
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"Location", location, "Content-Length", "0",
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)}, NL) + NL + NL))
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}
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func NewPeekConn(c net.Conn) PeekConn {
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return PeekConn{Conn: c, Buf: &Buf{}}
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}
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