简单实现 仿 JQuery 的 Ajax v2.0

vitoland2018年10月01日代码片段620
var JSyb = {
  id: function(id) {
    return document.getElementById(id)
  },
  fetch: function(url, method, options, callback) {
    if (arguments.length !== 4) return alert("fetch 参数错误") var initObj
    var searchStr = this.convert(options) if (method === "GET") {
      url += "?" + searchStr initObj = {
        method: "GET",
        credentials: "include",
        // 发送或接受cookie
      }
    }
    if (method === "POST") {
      initObj = {
        method: "POST",
        credentials: "include",
        headers: new Headers({
          //"Accept": "application/json",
          "Content-Type": "application/x-www-form-urlencoded"
        }),
        body: searchStr
      }
    }
    if (method === "FILE") {
      initObj = {
        method: "POST",
        credentials: "include",
        body: options
      }
    }
    fetch(url, initObj).then((data) = >{
      data.text().then((data) = >{
        callback(data)
      })
    })
  },
  convert: function(obj, arr = [], idx = 0) {
    if (typeof obj === "object") {
      var result = Object.keys(obj).map(function(key) {
        return encodeURIComponent(key) + "=" + encodeURIComponent(obj[key])
      }).join("&") return result + "&_=" + new Date().getTime()
    } else {
      return alert("convert Object错误")
    }
  },
  css: function(path) {
    if (!path || path.length === 0) {
      return "CSS 文件不存在"
    }
    var head = document.getElementsByTagName("head")[0]
    var link = document.createElement("link") link.href = path link.rel = "stylesheet"link.type = "text/css"head.appendChild(link)
  },
  js: function(path) {
    if (!path || path.length === 0) {
      return "JS 文件不存在"
    }
    var head = document.getElementsByTagName("head")[0]
    var script = document.createElement("script") script.src = path script.type = "text/javascript"head.appendChild(script)
  },
  uuid: function() {
    var d = new Date().getTime() var guid = 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g,
    function(c) {
      var r = (d + Math.random() * 16) % 16 | 0 d = Math.floor(d / 16) return (c == 'x' ? r: (r & 0x7 | 0x8)).toString(16)
    }) return guid
  },
  randnum: function(n) {
    var rnd = "";
    for (var i = 0; i < n; i++) rnd += Math.floor(Math.random() * 10);
    return rnd;
  },
  bin2hex: function(str) {
    var data = "";
    for (var i = 0; i < str.length; i++) {
      if (data === "") {
        data = str.charCodeAt(i).toString(16);
      } else {
        data += str.charCodeAt(i).toString(16);
      }
    }
    return data;
  },
  md5: function(string, mod) {
    function RotateLeft(lValue, iShiftBits) {
      return lValue << iShiftBits | lValue >>> 32 - iShiftBits;
    }

    function AddUnsigned(lX, lY) {
      var lX4, lY4, lX8, lY8, lResult;
      lX8 = lX & 2147483648;
      lY8 = lY & 2147483648;
      lX4 = lX & 1073741824;
      lY4 = lY & 1073741824;
      lResult = (lX & 1073741823) + (lY & 1073741823);
      if (lX4 & lY4) {
        return lResult ^ 2147483648 ^ lX8 ^ lY8;
      }
      if (lX4 | lY4) {
        if (lResult & 1073741824) {
          return lResult ^ 3221225472 ^ lX8 ^ lY8;
        } else {
          return lResult ^ 1073741824 ^ lX8 ^ lY8;
        }
      } else {
        return lResult ^ lX8 ^ lY8;
      }
    }

    function F(x, y, z) {
      return x & y | ~x & z;
    }

    function G(x, y, z) {
      return x & z | y & ~z;
    }

    function H(x, y, z) {
      return x ^ y ^ z;
    }

    function I(x, y, z) {
      return y ^ (x | ~z);
    }

    function FF(a, b, c, d, x, s, ac) {
      a = AddUnsigned(a, AddUnsigned(AddUnsigned(F(b, c, d), x), ac));
      return AddUnsigned(RotateLeft(a, s), b);
    }

    function GG(a, b, c, d, x, s, ac) {
      a = AddUnsigned(a, AddUnsigned(AddUnsigned(G(b, c, d), x), ac));
      return AddUnsigned(RotateLeft(a, s), b);
    }

    function HH(a, b, c, d, x, s, ac) {
      a = AddUnsigned(a, AddUnsigned(AddUnsigned(H(b, c, d), x), ac));
      return AddUnsigned(RotateLeft(a, s), b);
    }

    function II(a, b, c, d, x, s, ac) {
      a = AddUnsigned(a, AddUnsigned(AddUnsigned(I(b, c, d), x), ac));
      return AddUnsigned(RotateLeft(a, s), b);
    }

    function ConvertToWordArray(string) {
      var lWordCount;
      var lMessageLength = string.length;
      var lNumberOfWords_temp1 = lMessageLength + 8;
      var lNumberOfWords_temp2 = (lNumberOfWords_temp1 - lNumberOfWords_temp1 % 64) / 64;
      var lNumberOfWords = (lNumberOfWords_temp2 + 1) * 16;
      var lWordArray = Array(lNumberOfWords - 1);
      var lBytePosition = 0;
      var lByteCount = 0;
      while (lByteCount < lMessageLength) {
        lWordCount = (lByteCount - lByteCount % 4) / 4;
        lBytePosition = lByteCount % 4 * 8;
        lWordArray[lWordCount] = lWordArray[lWordCount] | string.charCodeAt(lByteCount) << lBytePosition;
        lByteCount++;
      }
      lWordCount = (lByteCount - lByteCount % 4) / 4;
      lBytePosition = lByteCount % 4 * 8;
      lWordArray[lWordCount] = lWordArray[lWordCount] | 128 << lBytePosition;
      lWordArray[lNumberOfWords - 2] = lMessageLength << 3;
      lWordArray[lNumberOfWords - 1] = lMessageLength >>> 29;
      return lWordArray;
    }

    function WordToHex(lValue) {
      var WordToHexValue = "",
      WordToHexValue_temp = "",
      lByte, lCount;
      for (lCount = 0; lCount <= 3; lCount++) {
        lByte = lValue >>> lCount * 8 & 255;
        WordToHexValue_temp = "0" + lByte.toString(16);
        WordToHexValue = WordToHexValue + WordToHexValue_temp.substr(WordToHexValue_temp.length - 2, 2);
      }
      return WordToHexValue;
    }

    function Utf8Encode(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;
    }
    var x = Array();
    var k, AA, BB, CC, DD, a, b, c, d;
    var S11 = 7,
    S12 = 12,
    S13 = 17,
    S14 = 22;
    var S21 = 5,
    S22 = 9,
    S23 = 14,
    S24 = 20;
    var S31 = 4,
    S32 = 11,
    S33 = 16,
    S34 = 23;
    var S41 = 6,
    S42 = 10,
    S43 = 15,
    S44 = 21;
    string = Utf8Encode(string);
    x = ConvertToWordArray(string);
    a = 1732584193;
    b = 4023233417;
    c = 2562383102;
    d = 271733878;
    for (k = 0; k < x.length; k += 16) {
      AA = a;
      BB = b;
      CC = c;
      DD = d;
      a = FF(a, b, c, d, x[k + 0], S11, 3614090360);
      d = FF(d, a, b, c, x[k + 1], S12, 3905402710);
      c = FF(c, d, a, b, x[k + 2], S13, 606105819);
      b = FF(b, c, d, a, x[k + 3], S14, 3250441966);
      a = FF(a, b, c, d, x[k + 4], S11, 4118548399);
      d = FF(d, a, b, c, x[k + 5], S12, 1200080426);
      c = FF(c, d, a, b, x[k + 6], S13, 2821735955);
      b = FF(b, c, d, a, x[k + 7], S14, 4249261313);
      a = FF(a, b, c, d, x[k + 8], S11, 1770035416);
      d = FF(d, a, b, c, x[k + 9], S12, 2336552879);
      c = FF(c, d, a, b, x[k + 10], S13, 4294925233);
      b = FF(b, c, d, a, x[k + 11], S14, 2304563134);
      a = FF(a, b, c, d, x[k + 12], S11, 1804603682);
      d = FF(d, a, b, c, x[k + 13], S12, 4254626195);
      c = FF(c, d, a, b, x[k + 14], S13, 2792965006);
      b = FF(b, c, d, a, x[k + 15], S14, 1236535329);
      a = GG(a, b, c, d, x[k + 1], S21, 4129170786);
      d = GG(d, a, b, c, x[k + 6], S22, 3225465664);
      c = GG(c, d, a, b, x[k + 11], S23, 643717713);
      b = GG(b, c, d, a, x[k + 0], S24, 3921069994);
      a = GG(a, b, c, d, x[k + 5], S21, 3593408605);
      d = GG(d, a, b, c, x[k + 10], S22, 38016083);
      c = GG(c, d, a, b, x[k + 15], S23, 3634488961);
      b = GG(b, c, d, a, x[k + 4], S24, 3889429448);
      a = GG(a, b, c, d, x[k + 9], S21, 568446438);
      d = GG(d, a, b, c, x[k + 14], S22, 3275163606);
      c = GG(c, d, a, b, x[k + 3], S23, 4107603335);
      b = GG(b, c, d, a, x[k + 8], S24, 1163531501);
      a = GG(a, b, c, d, x[k + 13], S21, 2850285829);
      d = GG(d, a, b, c, x[k + 2], S22, 4243563512);
      c = GG(c, d, a, b, x[k + 7], S23, 1735328473);
      b = GG(b, c, d, a, x[k + 12], S24, 2368359562);
      a = HH(a, b, c, d, x[k + 5], S31, 4294588738);
      d = HH(d, a, b, c, x[k + 8], S32, 2272392833);
      c = HH(c, d, a, b, x[k + 11], S33, 1839030562);
      b = HH(b, c, d, a, x[k + 14], S34, 4259657740);
      a = HH(a, b, c, d, x[k + 1], S31, 2763975236);
      d = HH(d, a, b, c, x[k + 4], S32, 1272893353);
      c = HH(c, d, a, b, x[k + 7], S33, 4139469664);
      b = HH(b, c, d, a, x[k + 10], S34, 3200236656);
      a = HH(a, b, c, d, x[k + 13], S31, 681279174);
      d = HH(d, a, b, c, x[k + 0], S32, 3936430074);
      c = HH(c, d, a, b, x[k + 3], S33, 3572445317);
      b = HH(b, c, d, a, x[k + 6], S34, 76029189);
      a = HH(a, b, c, d, x[k + 9], S31, 3654602809);
      d = HH(d, a, b, c, x[k + 12], S32, 3873151461);
      c = HH(c, d, a, b, x[k + 15], S33, 530742520);
      b = HH(b, c, d, a, x[k + 2], S34, 3299628645);
      a = II(a, b, c, d, x[k + 0], S41, 4096336452);
      d = II(d, a, b, c, x[k + 7], S42, 1126891415);
      c = II(c, d, a, b, x[k + 14], S43, 2878612391);
      b = II(b, c, d, a, x[k + 5], S44, 4237533241);
      a = II(a, b, c, d, x[k + 12], S41, 1700485571);
      d = II(d, a, b, c, x[k + 3], S42, 2399980690);
      c = II(c, d, a, b, x[k + 10], S43, 4293915773);
      b = II(b, c, d, a, x[k + 1], S44, 2240044497);
      a = II(a, b, c, d, x[k + 8], S41, 1873313359);
      d = II(d, a, b, c, x[k + 15], S42, 4264355552);
      c = II(c, d, a, b, x[k + 6], S43, 2734768916);
      b = II(b, c, d, a, x[k + 13], S44, 1309151649);
      a = II(a, b, c, d, x[k + 4], S41, 4149444226);
      d = II(d, a, b, c, x[k + 11], S42, 3174756917);
      c = II(c, d, a, b, x[k + 2], S43, 718787259);
      b = II(b, c, d, a, x[k + 9], S44, 3951481745);
      a = AddUnsigned(a, AA);
      b = AddUnsigned(b, BB);
      c = AddUnsigned(c, CC);
      d = AddUnsigned(d, DD);
    }
    if (mod == 16) {
      var temp = WordToHex(b) + WordToHex(c);
    } else {
      var temp = WordToHex(a) + WordToHex(b) + WordToHex(c) + WordToHex(d);
    }
    return temp.toLowerCase();
  }
}