Here is an example article on how to handle the response when sending a ping to a WebSocket API:

Processing Ping Responses via Binance WebSocket API

When working with APIs that provide real-time updates, it is essential to properly handle incoming responses to avoid errors and ensure a smooth user experience. A common issue is receiving incorrect or incomplete data from the API, which can be caused by misconfigured pings or unexpected network issues.

In this article, we will see how to send ping requests to the Binance WebSocket API (WS) and how to properly handle response errors when fetching real-time data streams for certain data sources.

Understanding the Structure of a Ping Request

Before we jump into the implementation, let’s take a look at the structure of a ping request:

POST /ws/batch/market/subscribe HTTP/1.1
Content-Type: application/json
{
"id": 1,
"method": "access",
"parameters": {
"symbol": "BTCUSDT",
"options": [
{"type": "limit", "size": 100},
{"type": "stop", "size": 50}
],
"timestamp": "1643723400"
},
"headers": {
"Authorization": "Your_API_TOKEN Deliverer"
}
}

Sending Ping Requests to Binance WS

For To send a ping request you can use the command line tool curl or a programming language like Python. Here is an example with Python:

import requests

Replace with API token and WebSocket URL
api_token = "YOUR_API_TOKEN"
ws_url = "wss://api.binance.com/api/v3/ws/spot"

Set the symbol, options, and timestamp for the data stream subscription
data_stream_symbol = "BTCUSDT"
options = [
{"type": "limit", "size": 100},
{"type": "stop", "size": 50}
]
timestamp = int(time.time())

Create a ping request
ping_request = {
"id": 1,
"method": "access",
"parameters": {
"symbol": data_stream_symbol,
"options": options,
"timestamp": timestamp
},
"headers": {
"Authorization": f"Bearer {api_token}"
}
}

Send a ping request
response = requests.post(ws_url, json=ping_request)
print(response.json())

Handling Response Errors

When sending a ping request, it is essential to correct any errors that may occur during transmission. Here are some possible error scenarios and ways to resolve them:

• Timeout error

  

  : If the WebSocket connection times out, the API returns an error response with status code 408.

{"error": "Connection timed out", "code": 408}

To handle this scenario, you can add a timeout parameter to the ping request:

import requests
#...
ping_request = {
"id": 1,
"method": "access",
"parameters": {
"symbol": dataflow_symbol,
"options": options,
"timestamp": timestamp,
"timeout": 5 
Set a timeout of 5 seconds
},
"headers": {
"Authorization": f"Bearer {api_token}"
}
}

• Invalid data error: If the API returns an error response due to invalid data, you can check the “error” field in the response.

{"error": "Invalid data", "code": 1001}

To handle this scenario, you can skip processing the request if the “error” field is not “200”.

• No response error

  : If there is no response from the API, it could be due to a network issue or an invalid WebSocket connection.

{"error": "Timeout", "code": 408}

To handle this situation, you can try to reconnect after a short delay.

By following these best practices and error handling strategies, you will be able to successfully send ping requests to the Binance WebSocket API and get instant update data streams for your desired symbol.