Silence annoying logs in iOS 11

Summary: Apple changed what messages get logged when a web socket connection fails. Lets hide them to make life better for engineers.

Reviewed By: javache

Differential Revision: D5879306

fbshipit-source-id: cde06405b4af251159269218bf922916a79ac840

Libraries/WebSocket/RCTReconnectingWebSocket.m

@@ -13,6 +13,10 @@
 #import <React/RCTDefines.h>
 #import <fishhook/fishhook.h>
 
+#if defined(__IPHONE_OS_VERSION_MAX_ALLOWED) && __IPHONE_OS_VERSION_MAX_ALLOWED >= 110000 /* __IPHONE_11_0 */
+#import <os/log.h>
+#endif /* __IPHONE_11_0 */
+
 #import "RCTSRWebSocket.h"
 
 #if RCT_DEV // Only supported in dev mode
@@ -27,11 +31,25 @@ static void my_nwlog_legacy_v(int level, char *format, va_list args) {
   vsnprintf(buffer, buffer_size, format, copy);
   va_end(copy);
 
-  if (strstr(buffer, "nw_connection_get_connected_socket_block_invoke") == NULL) {
+  if (strstr(buffer, "nw_connection_get_connected_socket_block_invoke") == NULL &&
+      strstr(buffer, "Connection has no connected handler") == NULL) {
     orig_nwlog_legacy_v(level, format, args);
   }
 }
 
+#if defined(__IPHONE_OS_VERSION_MAX_ALLOWED) && __IPHONE_OS_VERSION_MAX_ALLOWED >= 110000 /* __IPHONE_11_0 */
+
+static void (*orig_os_log_error_impl)(void *dso, os_log_t log, os_log_type_t type, const char *format, uint8_t *buf, uint32_t size);
+
+static void my_os_log_error_impl(void *dso, os_log_t log, os_log_type_t type, const char *format, uint8_t *buf, uint32_t size)
+{
+  if (strstr(format, "TCP Conn %p Failed : error %ld:%d") == NULL) {
+    orig_os_log_error_impl(dso, log, type, format, buf, size);
+  }
+}
+
+#endif /* __IPHONE_11_0 */
+
 @interface RCTReconnectingWebSocket () <RCTSRWebSocketDelegate>
 @end
 
@@ -49,6 +67,11 @@ + (void)load
     rebind_symbols((struct rebinding[1]){
       {"nwlog_legacy_v", my_nwlog_legacy_v, (void *)&orig_nwlog_legacy_v}
     }, 1);
+#if defined(__IPHONE_OS_VERSION_MAX_ALLOWED) && __IPHONE_OS_VERSION_MAX_ALLOWED >= 110000 /* __IPHONE_11_0 */
+    rebind_symbols((struct rebinding[1]){
+      {"_os_log_error_impl", my_os_log_error_impl, (void *)&orig_os_log_error_impl}
+    }, 1);
+#endif /* __IPHONE_11_0 */
   });
 }