From a9bd4c1206c0244fff49672be9a60dd5acd9bad4 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E7=8E=8B=E4=BA=9A=E7=90=AA?= <wangyaqi988@163.com>
Date: Mon, 27 Sep 2021 19:38:53 +0800
Subject: [PATCH] =?UTF-8?q?fix:=20=E4=BF=AE=E5=A4=8Duni-id=E7=9B=B8?=
 =?UTF-8?q?=E5=85=B3=E6=8E=A5=E5=8F=A3=E4=BD=BF=E7=94=A8atob=E5=9C=A8?=
 =?UTF-8?q?=E4=B8=8D=E6=94=AF=E6=8C=81=E7=9A=84=E5=B9=B3=E5=8F=B0=E5=AF=BC?=
 =?UTF-8?q?=E8=87=B4=E6=8A=A5=E9=94=99=E7=9A=84Bug?=
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---
 src/shared/uni-id-mixin.js | 30 +++++++++++++++++++++++++++++-
 1 file changed, 29 insertions(+), 1 deletion(-)

diff --git a/src/shared/uni-id-mixin.js b/src/shared/uni-id-mixin.js
index 3fae66c6f..b80d234a9 100644
--- a/src/shared/uni-id-mixin.js
+++ b/src/shared/uni-id-mixin.js
@@ -1,5 +1,33 @@
+let realAtob
+
+const b64 = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/='
+const b64re = /^(?:[A-Za-z\d+/]{4})*?(?:[A-Za-z\d+/]{2}(?:==)?|[A-Za-z\d+/]{3}=?)?$/
+
+if (typeof atob !== 'function') {
+  realAtob = function (str) {
+    str = String(str).replace(/[\t\n\f\r ]+/g, '')
+    if (!b64re.test(str)) { throw new Error("Failed to execute 'atob' on 'Window': The string to be decoded is not correctly encoded.") }
+
+    // Adding the padding if missing, for semplicity
+    str += '=='.slice(2 - (str.length & 3))
+    var bitmap; var result = ''; var r1; var r2; var i = 0
+    for (; i < str.length;) {
+      bitmap = b64.indexOf(str.charAt(i++)) << 18 | b64.indexOf(str.charAt(i++)) << 12 |
+                    (r1 = b64.indexOf(str.charAt(i++))) << 6 | (r2 = b64.indexOf(str.charAt(i++)))
+
+      result += r1 === 64 ? String.fromCharCode(bitmap >> 16 & 255)
+        : r2 === 64 ? String.fromCharCode(bitmap >> 16 & 255, bitmap >> 8 & 255)
+          : String.fromCharCode(bitmap >> 16 & 255, bitmap >> 8 & 255, bitmap & 255)
+    }
+    return result
+  }
+} else {
+  // 注意atob只能在全局对象上调用，例如：`const Base64 = {atob};Base64.atob('xxxx')`是错误的用法
+  realAtob = atob
+}
+
 function b64DecodeUnicode (str) {
-  return decodeURIComponent(atob(str).split('').map(function (c) {
+  return decodeURIComponent(realAtob(str).split('').map(function (c) {
     return '%' + ('00' + c.charCodeAt(0).toString(16)).slice(-2)
   }).join(''))
 }
-- 
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