Abnormally terminated

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

Understanding Binance REST API Connection

Before you dive into the solution for force closing the connection, it is important to understand how the Binance REST API handles connections with WinHTTP. When using WinHTTP as a proxy or in the context of your application, you may need to establish multiple connections to handle different scenarios simultaneously. These connections may close after use if they are not handled properly.

Solution: Force Closing the Connection

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

1. Establish connections and retrieve information

First, check for any errors during connection establishment. If everything goes well, you may want to log or print information about each connection established for analysis purposes.

import requests





Define the API endpoint URL and parameters
url = "

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

2. Close the connection

If an error occurs during the establishment process and the solution is not immediately apparent, consider closing the established connections. This step is crucial to maintain performance and reduce resource usage.

import os

Get a list of currently open connections
open_connections = []
for i in range(1, 21): 
Replace with a real number or a boolean to close all numbers except the specified
try:
conn_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'])
unless exception as e:

Log the error and continue with the next connection
print(f"Failed to establish connection {i}: {str(e)}")

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

Conclusion

Forcing a connection to close is a last resort that should be used judiciously to reduce unnecessary resource usage and maintain application performance. Always log errors for troubleshooting purposes, ensuring that you understand the root cause of any issues you encounter during connection establishment or closing.

Disclaimer: Before implementing this solution in production environments, verify that your system can handle temporary process termination (e.g. with Windows Task Manager). Also, be careful when using this method as it may have unintended consequences on the behavior of your application.

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