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28 lines
545 B
Go
28 lines
545 B
Go
package imapserver
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import (
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"net"
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)
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// prefixConn is a net.Conn with a buffer from which the first reads are satisfied.
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// used for STARTTLS where already did a buffered read of initial TLS data.
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type prefixConn struct {
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prefix []byte
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net.Conn
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}
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func (c *prefixConn) Read(buf []byte) (int, error) {
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if len(c.prefix) > 0 {
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n := len(buf)
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if n > len(c.prefix) {
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n = len(c.prefix)
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}
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copy(buf[:n], c.prefix[:n])
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c.prefix = c.prefix[n:]
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if len(c.prefix) == 0 {
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c.prefix = nil
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}
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return n, nil
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}
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return c.Conn.Read(buf)
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}
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