encode.js

//import crypto from 'crypto-js'
export const Base64 = {
  _keyStr: "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=",
  encode: function (input) {
    var output = "";
    var chr1, chr2, chr3, enc1, enc2, enc3, enc4;
    var i = 0;
    input = Base64._utf8_encode(input);
    while (i < input.length) {
      chr1 = input.charCodeAt(i++);
      chr2 = input.charCodeAt(i++);
      chr3 = input.charCodeAt(i++);
      enc1 = chr1 >> 2;
      enc2 = ((chr1 & 3) << 4) | (chr2 >> 4);
      enc3 = ((chr2 & 15) << 2) | (chr3 >> 6);
      enc4 = chr3 & 63;
      if (isNaN(chr2)) {
        enc3 = enc4 = 64;
      } else if (isNaN(chr3)) {
        enc4 = 64;
      }
      output = output + this._keyStr.charAt(enc1) + this._keyStr.charAt(enc2) + this._keyStr.charAt(enc3) + this._keyStr.charAt(enc4);
    }
    return output;
  },
  decode: function (input) {
    var output = "";
    var chr1, chr2, chr3;
    var enc1, enc2, enc3, enc4;
    var i = 0;
    input = input.replace(/[^A-Za-z0-9\+\/\=]/g, "");
    while (i < input.length) {
      enc1 = this._keyStr.indexOf(input.charAt(i++));
      enc2 = this._keyStr.indexOf(input.charAt(i++));
      enc3 = this._keyStr.indexOf(input.charAt(i++));
      enc4 = this._keyStr.indexOf(input.charAt(i++));
      chr1 = (enc1 << 2) | (enc2 >> 4);
      chr2 = ((enc2 & 15) << 4) | (enc3 >> 2);
      chr3 = ((enc3 & 3) << 6) | enc4;
      output = output + String.fromCharCode(chr1);
      if (enc3 != 64) {
        output = output + String.fromCharCode(chr2);
      }
      if (enc4 != 64) {
        output = output + String.fromCharCode(chr3);
      }
    }
    output = Base64._utf8_decode(output);
    return output;
  },
  _utf8_encode: function (string) {
    string = string.replace(/\r\n/g, "\n");
    var utftext = "";
    for (var n = 0; n < string.length; n++) {
      var c = string.charCodeAt(n);
      if (c < 128) {
        utftext += String.fromCharCode(c);
      } else if ((c > 127) && (c < 2048)) {
        utftext += String.fromCharCode((c >> 6) | 192);
        utftext += String.fromCharCode((c & 63) | 128);
      } else {
        utftext += String.fromCharCode((c >> 12) | 224);
        utftext += String.fromCharCode(((c >> 6) & 63) | 128);
        utftext += String.fromCharCode((c & 63) | 128);
      }
    }
    return utftext;
  },
  _utf8_decode: function (utftext) {
    var string = "";
    var i = 0;
    var c = c1 = c2 = 0;
    while (i < utftext.length) {
      c = utftext.charCodeAt(i);
      if (c < 128) {
        string += String.fromCharCode(c);
        i++;
      } else if ((c > 191) && (c < 224)) {
        c2 = utftext.charCodeAt(i + 1);
        string += String.fromCharCode(((c & 31) << 6) | (c2 & 63));
        i += 2;
      } else {
        c2 = utftext.charCodeAt(i + 1);
        c3 = utftext.charCodeAt(i + 2);
        string += String.fromCharCode(((c & 15) << 12) | ((c2 & 63) << 6) | (c3 & 63));
        i += 3;
      }
    }
    return string;
  }
}
export function generateSignature(method, path, params, headers, secret) {
  const crypto = require('crypto-js');

  function hmacSha256(message, secretKey) {

    const hmac = crypto.HmacSHA256(message, secretKey)
    return hmac.toString();
  }



  // Step 1: 对参数进行排序
  const sortedParams = Object.keys(params).sort().map(key => `${key}=${params[key]}`);

  // Step 2: 构建签名原文
  const signatureText = [
    method.toUpperCase(), // 请求方式大写
    encodeURIComponent(path),
    sortedParams.join('&'), // 请求参数
    `x-api-nonce:${headers['x-api-nonce']}`, // x-api-nonce
    `x-api-timestamp:${headers['x-api-timestamp']}` + '\n'
  ].join('\n');

  const signature = Base64.encode(hmacSha256(signatureText, secret))

  return signature;
}
export function buildURL(url, params) {
  if (!params) {
    return url;
  }
  for(let [key,value] of Object.entries(params)) {
    key = encodeURIComponent(key);
    value = encodeURIComponent(value);
  // params序列化过程略
    var hashmarkIndex = url.indexOf('#');
    if (hashmarkIndex !== -1) {
      url = url.slice(0, hashmarkIndex);  
    }
    url += (url.indexOf('?') === -1 ? '?' : '&') + `${key}=${value}`;
  }

  return url;
};
export const request = ({
  method = 'GET',
  path = '',
  params = {},
  data = {},
  secret = '42dbb95549efa327c617250efd39845c',
  clientId = '277152'
}) => {
  const headers = {
    'x-api-nonce': '1655775240000',
    'x-api-timestamp': Date.now()
  };
  const signature = generateSignature(method, path, params, headers, secret);
  const url = buildURL(`https://api.kingdee.com${path}`,params)
  return new Promise((resolve,reject) => {
    var config = {
      method,
      url: url,
      // params,
      data,
      header: {
        'X-Api-ClientID': clientId,
        'X-Api-Auth-Version': '2.0',
        'X-Api-SignHeaders': 'X-Api-TimeStamp,X-Api-Nonce',
        'Content-Type': 'application/json',
        ...Object.entries(headers).reduce((acc, [key, value]) => {
          acc[key.toUpperCase()] = value
          return acc
        }, {}),
        'X-Api-Signature': signature,
      },
      success(res) {
        resolve(res)
      },
      fail(err) {
        reject(err)
      }
    };
    wx.request(config)
  })
}