Receive BINARY_EVENT on ESP32 Socket.IO client

[Pro-282]

Hi,

I am trying to send a binary event from a node.js server to a esp32 client, but I only got the JSON encoded part of the event.
For example I got this: 451-["userData",{"time":1707930541,"data":{_placeholder":true,"num":0}}] but did not get the binary buffer.
Code:

case sIOtype_BINARY_EVENT:
            Serial.printf("[IOc] get binary: %u\n", length);
            hexdump(payload, length);

Serial monitor output:

[WS][0][handleWebsocket] text: 451-["userData",{"time":1707930541,"data":{_placeholder":true,"num":0}}]
[wsIOc] Socket.IO Message Type 5 (35) is not implemented
[wsIOc] get text: 451-["userData",{"time":1707930541,"data":{_placeholder":true,"num":0}}]
[IOc] get binary: 68

[HEXDUMP] Address: 0x3FFCF4DA len: 0x44 (68)
[0x3FFCF4DA] 0x00000000: 31 2D 5B 22 65 6E 72 6F 6C 6C 5F 74 65 6D 70 6C 
[0x3FFCF4EA] 0x00000010: 61 74 65 22 2C 7B 22 68 6F 73 74 6E 61 6D 65 22 
[0x3FFCF4FA] 0x00000020: 3A 22 45 53 50 33 32 20 45 6E 72 6F 6C 6C 20 70 
[0x3FFCF50A] 0x00000030: 6F 69 6E 74 22 2C 22 65 70 6F 63 68 54 69 6D 65 

I am guessing that the binary buffer frame sent after the first encoded json text is the cause of the [wsIOc] Socket.IO Message Type 5 (35) is not implemented

I've tried this to get the binary buffer, but it did not work:

case WStype_BIN:
            Serial.printf("[IOc] get bin: %u\n", length);
            hexdump(payload, length);
            break;

@Links2004 (I'm sorry for tagging you, but it's kind of urgent) how do I get the binary buffer after the first encoded json text.