// Node.js示例 - 使用OAuth 2.0获取新令牌
const axios = require('axios');

const clientId = 'YOUR_CLIENT_ID';
const clientSecret = 'YOUR_CLIENT_SECRET';
const redirectUri = 'YOUR_REDIRECT_URI';
const authCode = 'AUTHORIZATION_CODE_FROM_USER';

async function getNewAccessToken() {
  try {
    const response = await axios.post('https://www.linkedin.com/oauth/v2/accessToken', null, {
      params: {
        grant_type: 'authorization_code',
        code: authCode,
        redirect_uri: redirectUri,
        client_id: clientId,
        client_secret: clientSecret
      }
    });
    return response.data.access_token;
  } catch (error) {
    console.error('Error getting new access token:', error.response.data);
    throw error;
  }
}

# Python示例 - 使用刷新令牌
import requests

def refresh_access_token(refresh_token):
    url = "https://www.linkedin.com/oauth/v2/accessToken"
    params = {
        "grant_type": "refresh_token",
        "refresh_token": refresh_token,
        "client_id": "YOUR_CLIENT_ID",
        "client_secret": "YOUR_CLIENT_SECRET"
    }
    
    response = requests.post(url, params=params)
    if response.status_code == 200:
        return response.json()["access_token"]
    else:
        raise Exception(f"Token refresh failed: {response.text}")

// 检查令牌是否有效
async function verifyToken(accessToken) {
  try {
    const response = await axios.get('https://api.linkedin.com/v2/me', {
      headers: {
        'Authorization': `Bearer ${accessToken}`,
        'Connection': 'Keep-Alive'
      }
    });
    return response.status === 200;
  } catch (error) {
    if (error.response && error.response.status === 401) {
      return false; // 令牌无效
    }
    throw error;
  }
}