我正在尝试用 Javascript 加载一个页面（基本上是请求 google.com，加载 google.com 源代码），然后是 MD5 哈希（或 SHA-1，没有太大区别），然后将其与值我已经必须确认这是 google.com（例如）。
为了澄清，这里有一个更好的例子：
我有一个带有 url (myurl.com) 的应用程序。
源代码如下所示：<head></head><body></body>
我希望能够使用 Javascript 加载该源代码，将该内容散列成一个值，将该值与相同内容的预先计算的散列值进行比较，然后当且仅当它们相等时才显示结果。否则，我知道我没有在此页面上加载完全相同的内容，并且会显示某种错误。
如果这还不够清楚或需要更多信息，请告诉我。
使用 jQuery 下载页面并使用cross-domain-ajax进行跨域请求。
function utf8_encode ( string ) {
string = (string+'').replace(/\r\n/g, "\n").replace(/\r/g, "\n");
var utftext = "";
var start, end;
var stringl = 0;
start = end = 0;
stringl = string.length;
for (var n = 0; n < stringl; n++) {
var c1 = string.charCodeAt(n);
var enc = null;
if (c1 < 128) {
end++;
} else if((c1 > 127) && (c1 < 2048)) {
enc = String.fromCharCode((c1 >> 6) | 192) + String.fromCharCode((c1 & 63) | 128);
} else {
enc = String.fromCharCode((c1 >> 12) | 224) + String.fromCharCode(((c1 >> 6) & 63) | 128) + String.fromCharCode((c1 & 63) | 128);
}
if (enc != null) {
if (end > start) {
utftext += string.substring(start, end);
}
utftext += enc;
start = end = n+1;
}
}
if (end > start) {
utftext += string.substring(start, string.length);
}
return utftext;
}
function md5 (str) {
// http://kevin.vanzonneveld.net
// + original by: Webtoolkit.info (http://www.webtoolkit.info/)
// + namespaced by: Michael White (http://getsprink.com)
// + tweaked by: Jack
// + improved by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
// + input by: Brett Zamir (http://brett-zamir.me)
// + bugfixed by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
// - depends on: utf8_encode
// * example 1: md5('Kevin van Zonneveld');
// * returns 1: '6e658d4bfcb59cc13f96c14450ac40b9'
var xl;
var rotateLeft = function (lValue, iShiftBits) {
return (lValue << iShiftBits) | (lValue >>> (32 - iShiftBits));
};
var addUnsigned = function (lX, lY) {
var lX4, lY4, lX8, lY8, lResult;
lX8 = (lX & 0x80000000);
lY8 = (lY & 0x80000000);
lX4 = (lX & 0x40000000);
lY4 = (lY & 0x40000000);
lResult = (lX & 0x3FFFFFFF) + (lY & 0x3FFFFFFF);
if (lX4 & lY4) {
return (lResult ^ 0x80000000 ^ lX8 ^ lY8);
}
if (lX4 | lY4) {
if (lResult & 0x40000000) {
return (lResult ^ 0xC0000000 ^ lX8 ^ lY8);
} else {
return (lResult ^ 0x40000000 ^ lX8 ^ lY8);
}
} else {
return (lResult ^ lX8 ^ lY8);
}
};
var _F = function (x, y, z) {
return (x & y) | ((~x) & z);
};
var _G = function (x, y, z) {
return (x & z) | (y & (~z));
};
var _H = function (x, y, z) {
return (x ^ y ^ z);
};
var _I = function (x, y, z) {
return (y ^ (x | (~z)));
};
var _FF = function (a, b, c, d, x, s, ac) {
a = addUnsigned(a, addUnsigned(addUnsigned(_F(b, c, d), x), ac));
return addUnsigned(rotateLeft(a, s), b);
};
var _GG = function (a, b, c, d, x, s, ac) {
a = addUnsigned(a, addUnsigned(addUnsigned(_G(b, c, d), x), ac));
return addUnsigned(rotateLeft(a, s), b);
};
var _HH = function (a, b, c, d, x, s, ac) {
a = addUnsigned(a, addUnsigned(addUnsigned(_H(b, c, d), x), ac));
return addUnsigned(rotateLeft(a, s), b);
};
var _II = function (a, b, c, d, x, s, ac) {
a = addUnsigned(a, addUnsigned(addUnsigned(_I(b, c, d), x), ac));
return addUnsigned(rotateLeft(a, s), b);
};
var convertToWordArray = function (str) {
var lWordCount;
var lMessageLength = str.length;
var lNumberOfWords_temp1 = lMessageLength + 8;
var lNumberOfWords_temp2 = (lNumberOfWords_temp1 - (lNumberOfWords_temp1 % 64)) / 64;
var lNumberOfWords = (lNumberOfWords_temp2 + 1) * 16;
var lWordArray = new 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] | (str.charCodeAt(lByteCount) << lBytePosition));
lByteCount++;
}
lWordCount = (lByteCount - (lByteCount % 4)) / 4;
lBytePosition = (lByteCount % 4) * 8;
lWordArray[lWordCount] = lWordArray[lWordCount] | (0x80 << lBytePosition);
lWordArray[lNumberOfWords - 2] = lMessageLength << 3;
lWordArray[lNumberOfWords - 1] = lMessageLength >>> 29;
return lWordArray;
};
var wordToHex = function (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;
};
var x = [],
k, AA, BB, CC, DD, a, b, c, d, S11 = 7,
S12 = 12,
S13 = 17,
S14 = 22,
S21 = 5,
S22 = 9,
S23 = 14,
S24 = 20,
S31 = 4,
S32 = 11,
S33 = 16,
S34 = 23,
S41 = 6,
S42 = 10,
S43 = 15,
S44 = 21;
str = utf8_encode(str);
x = convertToWordArray(str);
a = 0x67452301;
b = 0xEFCDAB89;
c = 0x98BADCFE;
d = 0x10325476;
xl = x.length;
for (k = 0; k < xl; k += 16) {
AA = a;
BB = b;
CC = c;
DD = d;
a = _FF(a, b, c, d, x[k + 0], S11, 0xD76AA478);
d = _FF(d, a, b, c, x[k + 1], S12, 0xE8C7B756);
c = _FF(c, d, a, b, x[k + 2], S13, 0x242070DB);
b = _FF(b, c, d, a, x[k + 3], S14, 0xC1BDCEEE);
a = _FF(a, b, c, d, x[k + 4], S11, 0xF57C0FAF);
d = _FF(d, a, b, c, x[k + 5], S12, 0x4787C62A);
c = _FF(c, d, a, b, x[k + 6], S13, 0xA8304613);
b = _FF(b, c, d, a, x[k + 7], S14, 0xFD469501);
a = _FF(a, b, c, d, x[k + 8], S11, 0x698098D8);
d = _FF(d, a, b, c, x[k + 9], S12, 0x8B44F7AF);
c = _FF(c, d, a, b, x[k + 10], S13, 0xFFFF5BB1);
b = _FF(b, c, d, a, x[k + 11], S14, 0x895CD7BE);
a = _FF(a, b, c, d, x[k + 12], S11, 0x6B901122);
d = _FF(d, a, b, c, x[k + 13], S12, 0xFD987193);
c = _FF(c, d, a, b, x[k + 14], S13, 0xA679438E);
b = _FF(b, c, d, a, x[k + 15], S14, 0x49B40821);
a = _GG(a, b, c, d, x[k + 1], S21, 0xF61E2562);
d = _GG(d, a, b, c, x[k + 6], S22, 0xC040B340);
c = _GG(c, d, a, b, x[k + 11], S23, 0x265E5A51);
b = _GG(b, c, d, a, x[k + 0], S24, 0xE9B6C7AA);
a = _GG(a, b, c, d, x[k + 5], S21, 0xD62F105D);
d = _GG(d, a, b, c, x[k + 10], S22, 0x2441453);
c = _GG(c, d, a, b, x[k + 15], S23, 0xD8A1E681);
b = _GG(b, c, d, a, x[k + 4], S24, 0xE7D3FBC8);
a = _GG(a, b, c, d, x[k + 9], S21, 0x21E1CDE6);
d = _GG(d, a, b, c, x[k + 14], S22, 0xC33707D6);
c = _GG(c, d, a, b, x[k + 3], S23, 0xF4D50D87);
b = _GG(b, c, d, a, x[k + 8], S24, 0x455A14ED);
a = _GG(a, b, c, d, x[k + 13], S21, 0xA9E3E905);
d = _GG(d, a, b, c, x[k + 2], S22, 0xFCEFA3F8);
c = _GG(c, d, a, b, x[k + 7], S23, 0x676F02D9);
b = _GG(b, c, d, a, x[k + 12], S24, 0x8D2A4C8A);
a = _HH(a, b, c, d, x[k + 5], S31, 0xFFFA3942);
d = _HH(d, a, b, c, x[k + 8], S32, 0x8771F681);
c = _HH(c, d, a, b, x[k + 11], S33, 0x6D9D6122);
b = _HH(b, c, d, a, x[k + 14], S34, 0xFDE5380C);
a = _HH(a, b, c, d, x[k + 1], S31, 0xA4BEEA44);
d = _HH(d, a, b, c, x[k + 4], S32, 0x4BDECFA9);
c = _HH(c, d, a, b, x[k + 7], S33, 0xF6BB4B60);
b = _HH(b, c, d, a, x[k + 10], S34, 0xBEBFBC70);
a = _HH(a, b, c, d, x[k + 13], S31, 0x289B7EC6);
d = _HH(d, a, b, c, x[k + 0], S32, 0xEAA127FA);
c = _HH(c, d, a, b, x[k + 3], S33, 0xD4EF3085);
b = _HH(b, c, d, a, x[k + 6], S34, 0x4881D05);
a = _HH(a, b, c, d, x[k + 9], S31, 0xD9D4D039);
d = _HH(d, a, b, c, x[k + 12], S32, 0xE6DB99E5);
c = _HH(c, d, a, b, x[k + 15], S33, 0x1FA27CF8);
b = _HH(b, c, d, a, x[k + 2], S34, 0xC4AC5665);
a = _II(a, b, c, d, x[k + 0], S41, 0xF4292244);
d = _II(d, a, b, c, x[k + 7], S42, 0x432AFF97);
c = _II(c, d, a, b, x[k + 14], S43, 0xAB9423A7);
b = _II(b, c, d, a, x[k + 5], S44, 0xFC93A039);
a = _II(a, b, c, d, x[k + 12], S41, 0x655B59C3);
d = _II(d, a, b, c, x[k + 3], S42, 0x8F0CCC92);
c = _II(c, d, a, b, x[k + 10], S43, 0xFFEFF47D);
b = _II(b, c, d, a, x[k + 1], S44, 0x85845DD1);
a = _II(a, b, c, d, x[k + 8], S41, 0x6FA87E4F);
d = _II(d, a, b, c, x[k + 15], S42, 0xFE2CE6E0);
c = _II(c, d, a, b, x[k + 6], S43, 0xA3014314);
b = _II(b, c, d, a, x[k + 13], S44, 0x4E0811A1);
a = _II(a, b, c, d, x[k + 4], S41, 0xF7537E82);
d = _II(d, a, b, c, x[k + 11], S42, 0xBD3AF235);
c = _II(c, d, a, b, x[k + 2], S43, 0x2AD7D2BB);
b = _II(b, c, d, a, x[k + 9], S44, 0xEB86D391);
a = addUnsigned(a, AA);
b = addUnsigned(b, BB);
c = addUnsigned(c, CC);
d = addUnsigned(d, DD);
}
var temp = wordToHex(a) + wordToHex(b) + wordToHex(c) + wordToHex(d);
return temp.toLowerCase();
}
$(document).ready(function()
{
$.get("http://www.google.com/", function(page)
{
if(md5(page) == "1441a7909c087dbbe7ce59881b9df8b9")
console.log("matches");
else
console.log("Does not match");
});
});