: This step creates a new private CA on your system and automatically adds it to the trusted store of your operating system and browsers.
httpd = HTTPServer(('localhost', 11501), SimpleHTTPRequestHandler) httpd.socket = ssl.wrap_socket(httpd.socket, keyfile="localhost.key", certfile="localhost.crt", server_side=True) httpd.serve_forever()
This error is a clear indicator that something is fundamentally wrong with the server or your configuration. It appears when the browser expects to speak TLS (the encryption layer of HTTPS) but the server on the other end is not responding correctly. The most common cause is . If your application is only set up to serve plain HTTP (e.g., http://localhost:11501 ), but you attempt to access it via HTTPS ( https://localhost:11501 ), the server won't know how to handle the encrypted request and will throw this error. The solution is to correctly configure your server with the proper certificate and key files. This error is most often a sign the server is not actually speaking TLS on the port being hit. https localhost 11501 url
: Navigate to your project's root directory, or a dedicated ssl folder for your certificates. Then, run:
In the modern world of web development, encountering a URL like https://localhost:11501 is becoming increasingly common. For the uninitiated, this string of characters—combining a secure protocol ( https ), a local hostname ( localhost ), and an unconventional port ( 11501 )—can look like a cryptic error message. For developers, however, it represents a critical frontier: the shift toward . : This step creates a new private CA
This outputs a Process ID (PID) at the end of the line. You can close that process via Task Manager. : sudo lsof -i :11501 Use code with caution.
What’s running on your 11501 today?
localhost doesn’t judge your variable names. It doesn’t care about your git history. It just runs what you give it.