spamassassin integration

contrib/backends/srndv2/src/srnd/spam.go

@@ -0,0 +1,39 @@
+package srnd
+
+import (
+	"io"
+	"net"
+)
+
+type SpamFilter struct {
+	addr    string
+	enabled bool
+}
+
+func (sp *SpamFilter) Configure(c SpamConfig) {
+	sp.enabled = c.enabled
+	sp.addr = c.addr
+}
+
+func (sp *SpamFilter) Rewrite(msg io.Reader, out io.WriteCloser) error {
+	var buff [65636]byte
+	if sp.enabled {
+		addr, err := net.ResolveTCPAddr("tcp", sp.addr)
+		if err != nil {
+			return err
+		}
+		c, err := net.DialTCP("tcp", nil, addr)
+		if err != nil {
+			return err
+		}
+		io.CopyBuffer(c, msg, buff[:])
+		c.CloseWrite()
+		_, err = io.CopyBuffer(out, c, buff[:])
+		c.Close()
+		out.Close()
+		return err
+	}
+	io.CopyBuffer(out, msg, buff[:])
+	out.Close()
+	return nil
+}