var LZString = function() {
function f(h, e) {
if (!b[h]) {
b[h] = {};
for (var i = 0; i < h.length; i++) {
b[h][h.charAt(i)] = i
}
}
return b[h][e]
}
var c = String.fromCharCode,
g = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=",
d = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+-$",
b = {},
a = {
compressToBase64: function(h) {
if (null == h) {
return ""
}
var e = a._compress(h, 6,
function(i) {
return g.charAt(i)
});
switch (e.length % 4) {
default:
case 0:
return e;
case 1:
return e + "===";
case 2:
return e + "==";
case 3:
return e + "="
}
},
decompressFromBase64: function(e) {
return null == e ? "": "" == e ? null: a._decompress(e.length, 32,
function(h) {
return f(g, e.charAt(h))
})
},
compressToUTF16: function(e) {
return null == e ? "": a._compress(e, 15,
function(h) {
return c(h + 32)
}) + " "
},
decompressFromUTF16: function(e) {
return null == e ? "": "" == e ? null: a._decompress(e.length, 16384,
function(h) {
return e.charCodeAt(h) - 32
})
},
compressToUint8Array: function(l) {
for (var j = a.compress(l), m = new Uint8Array(2 * j.length), k = 0, h = j.length; h > k; k++) {
var i = j.charCodeAt(k);
m[2 * k] = i >>> 8,
m[2 * k + 1] = i % 256
}
return m
},
decompressFromUint8Array: function(k) {
if (null === k || void 0 === k) {
return a.decompress(k)
}
for (var l = new Array(k.length / 2), j = 0, h = l.length; h > j; j++) {
l[j] = 256 * k[2 * j] + k[2 * j + 1]
}
var i = [];
return l.forEach(function(e) {
i.push(c(e))
}),
a.decompress(i.join(""))
},
compressToEncodedURIComponent: function(e) {
return null == e ? "": a._compress(e, 6,
function(h) {
return d.charAt(h)
})
},
decompressFromEncodedURIComponent: function(e) {
return null == e ? "": "" == e ? null: (e = e.replace(/ /g, "+"), a._decompress(e.length, 32,
function(h) {
return f(d, e.charAt(h))
}))
},
compress: function(e) {
return a._compress(e, 16,
function(h) {
return c(h)
})
},
_compress: function(q, j, w) {
if (null == q) {
return ""
}
var C, I, z, J = {},
k = {},
H = "",
E = "",
F = "",
y = 2,
B = 3,
A = 2,
D = [],
x = 0,
G = 0;
for (z = 0; z < q.length; z += 1) {
if (H = q.charAt(z), Object.prototype.hasOwnProperty.call(J, H) || (J[H] = B++, k[H] = !0), E = F + H, Object.prototype.hasOwnProperty.call(J, E)) {
F = E
} else {
if (Object.prototype.hasOwnProperty.call(k, F)) {
if (F.charCodeAt(0) < 256) {
for (C = 0; A > C; C++) {
x <<= 1,
G == j - 1 ? (G = 0, D.push(w(x)), x = 0) : G++
}
for (I = F.charCodeAt(0), C = 0; 8 > C; C++) {
x = x << 1 | 1 & I,
G == j - 1 ? (G = 0, D.push(w(x)), x = 0) : G++,
I >>= 1
}
} else {
for (I = 1, C = 0; A > C; C++) {
x = x << 1 | I,
G == j - 1 ? (G = 0, D.push(w(x)), x = 0) : G++,
I = 0
}
for (I = F.charCodeAt(0), C = 0; 16 > C; C++) {
x = x << 1 | 1 & I,
G == j - 1 ? (G = 0, D.push(w(x)), x = 0) : G++,
I >>= 1
}
}
y--,
0 == y && (y = Math.pow(2, A), A++),
delete k[F]
} else {
for (I = J[F], C = 0; A > C; C++) {
x = x << 1 | 1 & I,
G == j - 1 ? (G = 0, D.push(w(x)), x = 0) : G++,
I >>= 1
}
}
y--,
0 == y && (y = Math.pow(2, A), A++),
J[E] = B++,
F = String(H)
}
}
if ("" !== F) {
if (Object.prototype.hasOwnProperty.call(k, F)) {
if (F.charCodeAt(0) < 256) {
for (C = 0; A > C; C++) {
x <<= 1,
G == j - 1 ? (G = 0, D.push(w(x)), x = 0) : G++
}
for (I = F.charCodeAt(0), C = 0; 8 > C; C++) {
x = x << 1 | 1 & I,
G == j - 1 ? (G = 0, D.push(w(x)), x = 0) : G++,
I >>= 1
}
} else {
for (I = 1, C = 0; A > C; C++) {
x = x << 1 | I,
G == j - 1 ? (G = 0, D.push(w(x)), x = 0) : G++,
I = 0
}
for (I = F.charCodeAt(0), C = 0; 16 > C; C++) {
x = x << 1 | 1 & I,
G == j - 1 ? (G = 0, D.push(w(x)), x = 0) : G++,
I >>= 1
}
}
y--,
0 == y && (y = Math.pow(2, A), A++),
delete k[F]
} else {
for (I = J[F], C = 0; A > C; C++) {
x = x << 1 | 1 & I,
G == j - 1 ? (G = 0, D.push(w(x)), x = 0) : G++,
I >>= 1
}
}
y--,
0 == y && (y = Math.pow(2, A), A++)
}
for (I = 2, C = 0; A > C; C++) {
x = x << 1 | 1 & I,
G == j - 1 ? (G = 0, D.push(w(x)), x = 0) : G++,
I >>= 1
}
for (;;) {
if (x <<= 1, G == j - 1) {
D.push(w(x));
break
}
G++
}
return D.join("")
},
decompress: function(e) {
return null == e ? "": "" == e ? null: a._decompress(e.length, 32768,
function(h) {
return e.charCodeAt(h)
})
},
_decompress: function(B, C, I) {
var r, F, x, z, q, K, L, E, H = [],
G = 4,
J = 4,
D = 3,
k = "",
j = [],
y = {
val: I(0),
position: C,
index: 1
};
for (F = 0; 3 > F; F += 1) {
H[F] = F
}
for (z = 0, K = Math.pow(2, 2), L = 1; L != K;) {
q = y.val & y.position,
y.position >>= 1,
0 == y.position && (y.position = C, y.val = I(y.index++)),
z |= (q > 0 ? 1 : 0) * L,
L <<= 1
}
switch (r = z) {
case 0:
for (z = 0, K = Math.pow(2, 8), L = 1; L != K;) {
q = y.val & y.position,
y.position >>= 1,
0 == y.position && (y.position = C, y.val = I(y.index++)),
z |= (q > 0 ? 1 : 0) * L,
L <<= 1
}
E = c(z);
break;
case 1:
for (z = 0, K = Math.pow(2, 16), L = 1; L != K;) {
q = y.val & y.position,
y.position >>= 1,
0 == y.position && (y.position = C, y.val = I(y.index++)),
z |= (q > 0 ? 1 : 0) * L,
L <<= 1
}
E = c(z);
break;
case 2:
return ""
}
for (H[3] = E, x = E, j.push(E);;) {
if (y.index > B) {
return ""
}
for (z = 0, K = Math.pow(2, D), L = 1; L != K;) {
q = y.val & y.position,
y.position >>= 1,
0 == y.position && (y.position = C, y.val = I(y.index++)),
z |= (q > 0 ? 1 : 0) * L,
L <<= 1
}
switch (E = z) {
case 0:
for (z = 0, K = Math.pow(2, 8), L = 1; L != K;) {
q = y.val & y.position,
y.position >>= 1,
0 == y.position && (y.position = C, y.val = I(y.index++)),
z |= (q > 0 ? 1 : 0) * L,
L <<= 1
}
H[J++] = c(z),
E = J - 1,
G--;
break;
case 1:
for (z = 0, K = Math.pow(2, 16), L = 1; L != K;) {
q = y.val & y.position,
y.position >>= 1,
0 == y.position && (y.position = C, y.val = I(y.index++)),
z |= (q > 0 ? 1 : 0) * L,
L <<= 1
}
H[J++] = c(z),
E = J - 1,
G--;
break;
case 2:
return j.join("")
}
if (0 == G && (G = Math.pow(2, D), D++), H[E]) {
k = H[E]
} else {
if (E !== J) {
return null
}
k = x + x.charAt(0)
}
j.push(k),
H[J++] = x + k.charAt(0),
G--,
x = k,
0 == G && (G = Math.pow(2, D), D++)
}
}
};
return a
} ();
var reqData = "123aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
console.log("压缩",LZString.compressToEncodedURIComponent(reqData)) //压缩
console.log("解压",LZString.decompressFromEncodedURIComponent("IwJgzAhl07fwx0g"))//解压
module.exports = LZStringJS压缩数据 和解压
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转载自blog.csdn.net/qq_34527689/article/details/89675828
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