baidu_ocr

const https = require('https');
var access_token = '';
function getToken() {
  const data = JSON.stringify({}); // 在这里填写POST请求的payload
  const options = {
    hostname: 'aip.baidubce.com',
    path: '/oauth/2.0/token?grant_type=client_credentials&client_id=XXX&client_secret=YYY',
    method: 'POST',
    headers: {
      'Content-Type': 'application/json',
      'Content-Length': data.length
    }
  };
  const req = https.request(options, res => {
    let body = '';
    res.on('data', chunk => {
      body += chunk;
    });
    res.on('end', () => {
      const jsonResponse = JSON.parse(body);
      access_token = jsonResponse.access_token;
    });
  });
  req.on('error', error => {
    console.error(error);
  });

  req.write(data);
  req.end();
}
getToken();
module.exports = access_token;
//拖延时间，使其同步，直到access_token出现，才执行下一步
const waitAndGetToken = () => {
    return new Promise(resolve => {
      const checkToken = () => {
        if (access_token) {
          resolve(access_token);
        } else {
          setTimeout(checkToken, 100);
        }
      };
      checkToken();
    });
  };
  waitAndGetToken().then(token => {
    // 在这里执行下一步操作
    xxx();
  });
function xxx(){
    const imageFilePath = 'D:/zhusc/celia/1.png'; // 图片文件路径
    const accessToken = access_token; // 在百度云OCR控制台中获取的access_token
    const fs = require('fs');
    const buffer = fs.readFileSync('D:/zhusc/celia/1.png'); // 读取文件，返回一个 Buffer 对象
    const base64Str = buffer.toString('base64'); // 将 Buffer 对象转换为 Base64 编码的字符串
    const img=base64Str
    //npm install axios@0.21.4 
    //axios多数是ES模块，但这版本是CommonJS模块，这方法好，Node.js 的 CommonJS 环境加载 ES 模块诸多不便
    const axios = require('C:/Users/lingyuncelia/AppData/Roaming/npm/node_modules/axios');
    const querystring = require('querystring');
    const params = {"image":img};
    //const request_url = 'https://aip.baidubce.com/rest/2.0/ocr/v1/general_basic';//标准版
    const request_url = 'https://aip.baidubce.com/rest/2.0/ocr/v1/accurate_basic';//高精度版
    const data = querystring.stringify(params);
    const headers = {'content-Type':'application/x-www-form-urlencoded'};
    const url = `${request_url}?access_token=${access_token}`;
    axios.post(url, data, {headers})
    .then(response => {
        console.log('words_0:' + response.data.words_result[0].words);
        //清除不可见字符
        const wordsValue = response.data.words_result[0].words.replace(/\s/g, '');
        if (wordsValue.length === 4) {
          console.log(`words: ${wordsValue}`);
        } else {
          console.log(`Invalid words value: ${wordsValue}`);
        }
    })
    .catch(error => {
        console.error(error);
    });
}