WsClient accept connection upgrade lowercase

Signed-off-by: tvallin <thibault.vallin@oracle.com>
tvallin · Apr 17, 2024 · 2425ed2 · 2425ed2
1 parent 22d4e62
commit 2425ed2
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/webclient/websocket/src/main/java/io/helidon/webclient/websocket/WsClientImpl.java b/webclient/websocket/src/main/java/io/helidon/webclient/websocket/WsClientImpl.java
@@ -55,6 +55,7 @@ class WsClientImpl implements WsClient {
 
     private static final System.Logger LOGGER = System.getLogger(WsClient.class.getName());
     private static final Header HEADER_CONN_UPGRADE = HeaderValues.create(HeaderNames.CONNECTION, "Upgrade");
+    private static final Header HEADER_CONN_UPGRADE_LOWERCASE = HeaderValues.create(HeaderNames.CONNECTION, "upgrade");
     private static final HeaderName HEADER_WS_ACCEPT = HeaderNames.create("Sec-WebSocket-Accept");
     private static final HeaderName HEADER_WS_KEY = HeaderNames.create("Sec-WebSocket-Key");
     private static final LazyValue<Random> RANDOM = LazyValue.create(SecureRandom::new);
@@ -127,7 +128,8 @@ public void connect(URI uri, WsListener listener) {
         ClientWsConnection session;
         try (HttpClientResponse response = upgradeResponse.response()) {
             ClientResponseHeaders responseHeaders = response.headers();
-            if (!responseHeaders.contains(HEADER_CONN_UPGRADE)) {
+            if (!responseHeaders.contains(HEADER_CONN_UPGRADE)
+                    && !responseHeaders.contains(HEADER_CONN_UPGRADE_LOWERCASE)) {
                 throw new WsClientException("Failed to upgrade to WebSocket, expected Connection: Upgrade header. Headers: "
                                                     + responseHeaders);
             }