This is terminated abnormally

When working with Binance REST API using WinHTTP, there may be a situation where requests fail due to an abnormal termination of the server connection. Error code 12030 usually means that the connection was terminated unexpectedly by the server. In this article, we will show you how to force close the connection after receiving such an error.

Understanding Binance REST API Connection

Before we move on to the solution of forcing the connection to be closed, it is important to understand how Binance REST API handles WinHTTP connections. When using WinHTTP as a proxy server or in the context of your application, you may need to establish multiple connections to handle different scenarios simultaneously. These connections can be closed after use if they are not handled properly.

Solution: Force close the connection

To force close the connection after error code 12030, follow these steps:

1. Establishing connections and retrieving information

First, make sure that there are no errors during the connection establishment. If everything goes well, you can log or print information about each established connection for analysis purposes.

import requests









Define the URL and parameters of the API endpoint
url = "

Initialize a dictionary with connection details
connection_details = {
'method': 'GET',
'params': [1, 2, 3], 
Override these values ​​as needed
}
response = requests.get(url, params=connection_details)
if response.status_code == 200:
print("Connection successful.")
otherwise:
print(f"Connection failed: {response.text}")

2. Close the connection

If an error occurs during the connection process and there is no immediate solution, consider closing the connection established connections. This step is crucial to maintain efficiency and minimize resource usage.

importing OS

Get list of currently open connections
open_connections = []
for i in range (1, 21): 
Replace with actual number or logic to close all but specified number
try:
connection_details = {
'method': 'GET',
'params': [i], 
Replace values ​​as needed
}
response = requests.get(url + str(i), params=conn_details)
if response.status_code == 200:
print(f"Connection {i} established.")
open_connections.append(conn_details['url'])
except exception as e:

Log error and continue on next connection
print(f"Connection {i} failed: {str(e)}")

Close a specified number of connections (in this case 18)
for url in open_connections[:len(open_connections) - len([conn['url'] for conn in open_connections]) // 2]:
os.system("taskkill /im " + url)
print(f"Connections closed. Remaining: {len(open_connections)}")

Conclusion

Forced connection closure is a last resort that should be used with caution to minimize unnecessary resource usage and maintain application performance. Always log errors for troubleshooting purposes to ensure you understand the root cause of any issues encountered while establishing or closing a connection.

Disclaimer: Before implementing this solution in production environments, ensure that the system is able to handle temporary process termination (e.g. via Windows Task Manager). Use this method with caution as it may have unintended consequences on application behavior.