From 581ceae70d3e3a768cb45e24a55ab87a3c7ca546 Mon Sep 17 00:00:00 2001
From: Nikola Irinchev <irinchev@me.com>
Date: Fri, 10 Nov 2023 09:57:28 +0100
Subject: [PATCH] Handle duplicate certificates (#1425)

---
 lib/src/app.dart | 15 ++++++++++++---
 topic.md         |  0
 2 files changed, 12 insertions(+), 3 deletions(-)
 delete mode 100644 topic.md

diff --git a/lib/src/app.dart b/lib/src/app.dart
index 4116c1c34..90d499f32 100644
--- a/lib/src/app.dart
+++ b/lib/src/app.dart
@@ -64,9 +64,18 @@ he8Y4IWS6wY7bCkjCWDcRQJMEhg76fsO3txE+FiYruq9RUWhiF1myv4Q6W+CyBFC
 Dfvp7OOGAN6dEOM4+qR9sdjoSYKEBpsr6GtPAQw4dy753ec5
 -----END CERTIFICATE-----''';
 
-  final context = SecurityContext(withTrustedRoots: true);
-  context.setTrustedCertificatesBytes(const AsciiEncoder().convert(isrgRootX1CertPEM));
-  return HttpClient(context: context);
+  try {
+    final context = SecurityContext(withTrustedRoots: true);
+    context.setTrustedCertificatesBytes(const AsciiEncoder().convert(isrgRootX1CertPEM));
+    return HttpClient(context: context);
+  } on TlsException catch (e) {
+    if (e.osError?.message.contains("CERT_ALREADY_IN_HASH_TABLE") == true) {
+      // certificate is already trusted. Nothing to do here
+      return HttpClient();
+    } else {
+      rethrow;
+    }
+  }
 }();
 
 /// A class exposing configuration options for an [App]
diff --git a/topic.md b/topic.md
deleted file mode 100644
index e69de29bb..000000000