Webtask for oauth2-authorize.

oauth2-authorize.js

module.exports = function(context, request, response) {
  if (request.method !== 'GET') {
    response.writeHead(400, { 'Content-Type': 'text/html' });
    return response.end('Must be GET request');
  }
  
  if (context.query.response_type !== 'code') {
    response.writeHead(400, { 'Content-Type': 'text/html' });
    return response.end('response_type must be "code"');
  }
  
  if (context.query.client_id !== '1234') {
    response.writeHead(400, { 'Content-Type': 'text/html' });
    return response.end('Invalid client_id parameter');
  }
  
  if (!context.query.redirect_uri) {
    response.writeHead(400, { 'Content-Type': 'text/html' });
    return response.end('Invalid redirect_uri parameter');
  }
  
  if (!context.query.state) {
    response.writeHead(400, { 'Content-Type': 'text/html' });
    return response.end('Invalid state parameter');
  }
  
  const redirectUrl = `${context.query.redirect_uri}?code=one_time_code&state=${request.query.state}`;
  
  response.writeHead(302, { 'Location': redirectUrl });
  return response.end();
};