I understand you are trying to implement OAuth authentication in MATLAB to interact with the Spotify API. You have successfully created the authorisation URL and opened it in a web browser using the web function.
However, you're facing an issue with retrieving the callback URL, which contains the authorization code after the user presses the authorize button.
Here's a step-by-step guide on how to proceed:
- Setting Up a Local Web Server: Since MATLAB does not inherently support OAuth redirections, you will need to set up a local web server within MATLAB that will handle the callback from Spotify's OAuth service.
- Listening for the Callback: After the user authorizes your application on Spotify, the service will redirect to specified "redirect_uri", including the authorization code as a query parameter.
- Example Implementation: Below is a basic example of how to create a simple HTTP server in MATLAB that listens for the OAuth callback:
% Set up the parameters for the Spotify API authorization request
client_id = 'YOUR_CLIENT_ID';
redirect_uri = 'http://localhost:8080';
scope = 'user-read-private user-read-email';
response_type = 'code';
% Construct the authorization URL
auth_url = "https://accounts.spotify.com/authorize?";
auth_url = strcat(auth_url, "client_id=", client_id);
auth_url = strcat(auth_url, "&redirect_uri=", urlencode(redirect_uri));
auth_url = strcat(auth_url, "&scope=", urlencode(scope));
auth_url = strcat(auth_url, "&response_type=", response_type);
% Open the authorization URL in the default web browser
web(auth_url, '-browser');
% Start a local web server to listen for the redirect
tcpipServer = tcpserver('localhost', 8080);
% Wait for a connection
while ~tcpipServer.Connected
pause(1);
end
% Read the data from the connection (includes the authorization code)
data = read(tcpipServer, tcpipServer.BytesAvailable, 'string');
% Extract the authorization code from the data
code = extractBetween(data, 'code=', ' ');
% Close the server
clear tcpipServer;
% Display the authorization code
disp(code);
Refer to following MathWorks Documentation regarding the TCP server and web:
- https://www.mathworks.com/help/slrealtime/io_ref/tcpserver.html
- https://www.mathworks.com/help/matlab/ref/web.html
You may use your client_id and change the variables required according to the use case.
Hope it helps !
