Harden scan robustness and tests

plugins/services/http_body_test.go

@@ -0,0 +1,19 @@
+//go:build plugin_elasticsearch || plugin_neo4j || plugin_rabbitmq || !plugin_selective
+
+package services
+
+import (
+	"strings"
+	"testing"
+)
+
+func TestReadServiceHTTPBodyIsBounded(t *testing.T) {
+	body := strings.NewReader(strings.Repeat("a", maxServiceHTTPBodyBytes+1024))
+	got, err := readServiceHTTPBody(body)
+	if err != nil {
+		t.Fatalf("readServiceHTTPBody error = %v", err)
+	}
+	if len(got) != maxServiceHTTPBodyBytes {
+		t.Fatalf("body len = %d, want %d", len(got), maxServiceHTTPBodyBytes)
+	}
+}