mirror of
https://github.com/bettercap/bettercap
synced 2025-07-16 10:03:39 -07:00
52 lines
1 KiB
Go
52 lines
1 KiB
Go
package vhost
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import (
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"bytes"
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"io"
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"net"
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"sync"
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)
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const (
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initVhostBufSize = 1024 // allocate 1 KB up front to try to avoid resizing
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)
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type sharedConn struct {
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sync.Mutex
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net.Conn // the raw connection
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vhostBuf *bytes.Buffer // all of the initial data that has to be read in order to vhost a connection is saved here
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}
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func newShared(conn net.Conn) (*sharedConn, io.Reader) {
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c := &sharedConn{
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Conn: conn,
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vhostBuf: bytes.NewBuffer(make([]byte, 0, initVhostBufSize)),
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}
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return c, io.TeeReader(conn, c.vhostBuf)
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}
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func (c *sharedConn) Read(p []byte) (n int, err error) {
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c.Lock()
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if c.vhostBuf == nil {
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c.Unlock()
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return c.Conn.Read(p)
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}
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n, err = c.vhostBuf.Read(p)
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// end of the request buffer
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if err == io.EOF {
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// let the request buffer get garbage collected
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// and make sure we don't read from it again
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c.vhostBuf = nil
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// continue reading from the connection
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var n2 int
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n2, err = c.Conn.Read(p[n:])
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// update total read
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n += n2
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}
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c.Unlock()
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return
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}
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