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package network
import (
"bufio"
"bytes"
"fmt"
"net"
"net/http"
"sync"
)
type AutoHttpsConn struct {
net.Conn
firstBuf []byte
bufStart int
readRequestOnce sync.Once
}
func NewAutoHttpsConn(conn net.Conn) net.Conn {
return &AutoHttpsConn{
Conn: conn,
}
}
func (c *AutoHttpsConn) readRequest() bool {
c.firstBuf = make([]byte, 2048)
n, err := c.Conn.Read(c.firstBuf)
c.firstBuf = c.firstBuf[:n]
if err != nil {
return false
}
reader := bytes.NewReader(c.firstBuf)
bufReader := bufio.NewReader(reader)
request, err := http.ReadRequest(bufReader)
if err != nil {
return false
}
resp := http.Response{
Header: http.Header{},
}
resp.StatusCode = http.StatusTemporaryRedirect
location := fmt.Sprintf("https://%v%v", request.Host, request.RequestURI)
resp.Header.Set("Location", location)
resp.Write(c.Conn)
c.Close()
c.firstBuf = nil
return true
}
func (c *AutoHttpsConn) Read(buf []byte) (int, error) {
c.readRequestOnce.Do(func() {
c.readRequest()
})
if c.firstBuf != nil {
n := copy(buf, c.firstBuf[c.bufStart:])
c.bufStart += n
if c.bufStart >= len(c.firstBuf) {
c.firstBuf = nil
}
return n, nil
}
return c.Conn.Read(buf)
}
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