Harden scan robustness and tests

common/proxy/httpdialer_test.go

@@ -0,0 +1,23 @@
+package proxy
+
+import (
+	"net"
+	"testing"
+	"time"
+)
+
+func TestHTTPDialerRejectsConnectTargetWithLineBreak(t *testing.T) {
+	client, server := net.Pipe()
+	defer client.Close()
+	defer server.Close()
+
+	dialer := &httpDialer{
+		config: &ProxyConfig{Timeout: time.Second},
+		stats:  &ProxyStats{},
+	}
+
+	err := dialer.sendConnectRequest(client, "example.com:80\r\nX-Injected: yes")
+	if err == nil {
+		t.Fatal("sendConnectRequest() error = nil, want invalid target error")
+	}
+}