Abnormally terminated

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

Understanding Binance REST API Connection

Before you dive into the solution for forcefully closing the connection, it is important to understand how the Binance REST API handles WinHTTP connections. When using WinHTTP as a proxy server or in the context of an application, it may be necessary to establish multiple connections to support different scenarios simultaneously. These connections may be closed after use if they are not handled properly.

Solution: Force Close the Connection

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

1. Establish connections and get information

First, check for any errors while establishing the connection. If everything goes well, you may want to log or print information about each connection established for analytical 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 established successfully.")
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 maintaining efficiency and reducing resource usage.

import osa

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 ​​if necessary
}
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 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. Other: {len(open_connections)}")

Usage

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, making sure you understand the cause of any problems you encounter when establishing or closing a connection.

Disclaimer: Before deploying this solution to production environments, verify that the system can handle temporary process termination (e.g., via Windows Task Manager). Be careful when using this method as it may have unintended consequences on application behavior.