javascript 只使用Javascript获取Gravatar

Posted 2021-05-03

function get_gravatar(email, size) {
    // MD5 (Message-Digest Algorithm) by WebToolkit
    // 
    var MD5 = function (s) { function L(k, d) { return (k << d) | (k >>> (32 - d)) } function K(G, k) { var I, d, F, H, x; F = (G & 2147483648); H = (k & 2147483648); I = (G & 1073741824); d = (k & 1073741824); x = (G & 1073741823) + (k & 1073741823); if (I & d) { return (x ^ 2147483648 ^ F ^ H) } if (I | d) { if (x & 1073741824) { return (x ^ 3221225472 ^ F ^ H) } else { return (x ^ 1073741824 ^ F ^ H) } } else { return (x ^ F ^ H) } } function r(d, F, k) { return (d & F) | ((~d) & k) } function q(d, F, k) { return (d & k) | (F & (~k)) } function p(d, F, k) { return (d ^ F ^ k) } function n(d, F, k) { return (F ^ (d | (~k))) } function u(G, F, aa, Z, k, H, I) { G = K(G, K(K(r(F, aa, Z), k), I)); return K(L(G, H), F) } function f(G, F, aa, Z, k, H, I) { G = K(G, K(K(q(F, aa, Z), k), I)); return K(L(G, H), F) } function D(G, F, aa, Z, k, H, I) { G = K(G, K(K(p(F, aa, Z), k), I)); return K(L(G, H), F) } function t(G, F, aa, Z, k, H, I) { G = K(G, K(K(n(F, aa, Z), k), I)); return K(L(G, H), F) } function e(G) { var Z; var F = G.length; var x = F + 8; var k = (x - (x % 64)) / 64; var I = (k + 1) * 16; var aa = Array(I - 1); var d = 0; var H = 0; while (H < F) { Z = (H - (H % 4)) / 4; d = (H % 4) * 8; aa[Z] = (aa[Z] | (G.charCodeAt(H) << d)); H++ } Z = (H - (H % 4)) / 4; d = (H % 4) * 8; aa[Z] = aa[Z] | (128 << d); aa[I - 2] = F << 3; aa[I - 1] = F >>> 29; return aa } function B(x) { var k = "", F = "", G, d; for (d = 0; d <= 3; d++) { G = (x >>> (d * 8)) & 255; F = "0" + G.toString(16); k = k + F.substr(F.length - 2, 2) } return k } function J(k) { k = k.replace(/rn/g, "n"); var d = ""; for (var F = 0; F < k.length; F++) { var x = k.charCodeAt(F); if (x < 128) { d += String.fromCharCode(x) } else { if ((x > 127) && (x < 2048)) { d += String.fromCharCode((x >> 6) | 192); d += String.fromCharCode((x & 63) | 128) } else { d += String.fromCharCode((x >> 12) | 224); d += String.fromCharCode(((x >> 6) & 63) | 128); d += String.fromCharCode((x & 63) | 128) } } } return d } var C = Array(); var P, h, E, v, g, Y, X, W, V; var S = 7, Q = 12, N = 17, M = 22; var A = 5, z = 9, y = 14, w = 20; var o = 4, m = 11, l = 16, j = 23; var U = 6, T = 10, R = 15, O = 21; s = J(s); C = e(s); Y = 1732584193; X = 4023233417; W = 2562383102; V = 271733878; for (P = 0; P < C.length; P += 16) { h = Y; E = X; v = W; g = V; Y = u(Y, X, W, V, C[P + 0], S, 3614090360); V = u(V, Y, X, W, C[P + 1], Q, 3905402710); W = u(W, V, Y, X, C[P + 2], N, 606105819); X = u(X, W, V, Y, C[P + 3], M, 3250441966); Y = u(Y, X, W, V, C[P + 4], S, 4118548399); V = u(V, Y, X, W, C[P + 5], Q, 1200080426); W = u(W, V, Y, X, C[P + 6], N, 2821735955); X = u(X, W, V, Y, C[P + 7], M, 4249261313); Y = u(Y, X, W, V, C[P + 8], S, 1770035416); V = u(V, Y, X, W, C[P + 9], Q, 2336552879); W = u(W, V, Y, X, C[P + 10], N, 4294925233); X = u(X, W, V, Y, C[P + 11], M, 2304563134); Y = u(Y, X, W, V, C[P + 12], S, 1804603682); V = u(V, Y, X, W, C[P + 13], Q, 4254626195); W = u(W, V, Y, X, C[P + 14], N, 2792965006); X = u(X, W, V, Y, C[P + 15], M, 1236535329); Y = f(Y, X, W, V, C[P + 1], A, 4129170786); V = f(V, Y, X, W, C[P + 6], z, 3225465664); W = f(W, V, Y, X, C[P + 11], y, 643717713); X = f(X, W, V, Y, C[P + 0], w, 3921069994); Y = f(Y, X, W, V, C[P + 5], A, 3593408605); V = f(V, Y, X, W, C[P + 10], z, 38016083); W = f(W, V, Y, X, C[P + 15], y, 3634488961); X = f(X, W, V, Y, C[P + 4], w, 3889429448); Y = f(Y, X, W, V, C[P + 9], A, 568446438); V = f(V, Y, X, W, C[P + 14], z, 3275163606); W = f(W, V, Y, X, C[P + 3], y, 4107603335); X = f(X, W, V, Y, C[P + 8], w, 1163531501); Y = f(Y, X, W, V, C[P + 13], A, 2850285829); V = f(V, Y, X, W, C[P + 2], z, 4243563512); W = f(W, V, Y, X, C[P + 7], y, 1735328473); X = f(X, W, V, Y, C[P + 12], w, 2368359562); Y = D(Y, X, W, V, C[P + 5], o, 4294588738); V = D(V, Y, X, W, C[P + 8], m, 2272392833); W = D(W, V, Y, X, C[P + 11], l, 1839030562); X = D(X, W, V, Y, C[P + 14], j, 4259657740); Y = D(Y, X, W, V, C[P + 1], o, 2763975236); V = D(V, Y, X, W, C[P + 4], m, 1272893353); W = D(W, V, Y, X, C[P + 7], l, 4139469664); X = D(X, W, V, Y, C[P + 10], j, 3200236656); Y = D(Y, X, W, V, C[P + 13], o, 681279174); V = D(V, Y, X, W, C[P + 0], m, 3936430074); W = D(W, V, Y, X, C[P + 3], l, 3572445317); X = D(X, W, V, Y, C[P + 6], j, 76029189); Y = D(Y, X, W, V, C[P + 9], o, 3654602809); V = D(V, Y, X, W, C[P + 12], m, 3873151461); W = D(W, V, Y, X, C[P + 15], l, 530742520); X = D(X, W, V, Y, C[P + 2], j, 3299628645); Y = t(Y, X, W, V, C[P + 0], U, 4096336452); V = t(V, Y, X, W, C[P + 7], T, 1126891415); W = t(W, V, Y, X, C[P + 14], R, 2878612391); X = t(X, W, V, Y, C[P + 5], O, 4237533241); Y = t(Y, X, W, V, C[P + 12], U, 1700485571); V = t(V, Y, X, W, C[P + 3], T, 2399980690); W = t(W, V, Y, X, C[P + 10], R, 4293915773); X = t(X, W, V, Y, C[P + 1], O, 2240044497); Y = t(Y, X, W, V, C[P + 8], U, 1873313359); V = t(V, Y, X, W, C[P + 15], T, 4264355552); W = t(W, V, Y, X, C[P + 6], R, 2734768916); X = t(X, W, V, Y, C[P + 13], O, 1309151649); Y = t(Y, X, W, V, C[P + 4], U, 4149444226); V = t(V, Y, X, W, C[P + 11], T, 3174756917); W = t(W, V, Y, X, C[P + 2], R, 718787259); X = t(X, W, V, Y, C[P + 9], O, 3951481745); Y = K(Y, h); X = K(X, E); W = K(W, v); V = K(V, g) } var i = B(Y) + B(X) + B(W) + B(V); return i.toLowerCase() };
    var size = size || 80;
    return 'http://www.gravatar.com/avatar/' + MD5(email) + '.jpg?s=' + size;
}

document.write('<img src="' + get_gravatar('[e-mail]', 50) + '" />');