使用JavaScript如何获取阿里云nls token

获取阿里云nls token需要进行以下步骤：

1. 在阿里云控制台中开通阿里云NLS服务，获取accessKeyId和accessKeySecret。

2. 使用accessKeyId和accessKeySecret生成签名字符串。

3. 将签名字符串发送到阿里云NLS服务的URL中，获取token。

以下是使用JavaScript获取阿里云NLS token的示例代码：

const crypto = require('crypto');
const https = require('https');

const accessKeyId = 'your_accessKeyId';
const accessKeySecret = 'your_accessKeySecret';

// 生成签名字符串
function generateSignature() {
  const timestamp = Date.now();
  const nonce = Math.floor(Math.random() * 100000);
  const message = `POST\napplication/json\n\napplication/json\nx-acs-signature-method:HMAC-SHA1\nx-acs-signature-nonce:${nonce}\nx-acs-signature-version:1.0\nx-acs-timestamp:${timestamp}\n/nls-service/token\naccessKeyId:${accessKeyId}`;
  const hmac = crypto.createHmac('sha1', accessKeySecret);
  hmac.update(message);
  const signature = hmac.digest('base64');
  return {
    signature,
    timestamp,
    nonce,
  };
}

// 发送请求获取token
function requestToken() {
  const { signature, timestamp, nonce } = generateSignature();
  const options = {
    hostname: 'nls-meta.cn-shanghai.aliyuncs.com',
    path: '/nls-service/token',
    method: 'POST',
    headers: {
      'Content-Type': 'application/json',
      'x-acs-signature-method': 'HMAC-SHA1',
      'x-acs-signature-nonce': nonce,
      'x-acs-signature-version': '1.0',
      'x-acs-timestamp': timestamp,
      'accessKeyId': accessKeyId,
      'Authorization': `acs ${accessKeyId}:${signature}`,
    },
  };
  const req = https.request(options, (res) => {
    res.on('data', (d) => {
      console.log(JSON.parse(d));
    });
  });
  req.on('error', (error) => {
    console.error(error);
  });
  req.end();
}

requestToken();