aiohttp.client_exceptions.ClientConnectorCertificateError - Python

The aiohttp.client_exceptions.ClientConnectorCertificateError is a Python exception that occurs when a client is unable to verify the SSL certificate of the server it is trying to connect to using SSL/TLS.

Causes

There are a number of possible causes for this exception, including:

• An expired or invalid SSL certificate on the server
• Incorrectly configured SSL certificates on the client
• An issue with the SSL protocol or configuration on either the client or the server

Solutions

The best solution for this error will depend on the root cause. However, some common troubleshooting steps include:

• Checking the SSL certificate on the server to ensure it is valid and has not expired
• Verifying that the SSL certificate is correctly installed on the server
• Reviewing the SSL configuration on both the client and server to ensure they are compatible and correctly configured
• Checking for any known issues with the SSL library or version being used by either the client or server

Code Example

Here is an example of how this exception might be raised in Python:

import aiohttp

async def get(url):
    async with aiohttp.ClientSession() as session:
        async with session.get(url) as response:
            data = await response.read()
            return data

if __name__ == '__main__':
    url = 'https://example.com'
    try:
        data = asyncio.run(get(url))
        print(data.decode())
    except aiohttp.ClientConnectorCertificateError as e:
        print(f'Error: {e}')

In this example, the aiohttp.client_exceptions.ClientConnectorCertificateError exception will be raised if the SSL certificate on the server is not verified.