modify buffer code

Author: wangding

02-global/02-base64.js

@@ -5,12 +5,15 @@ const log = console.log,
       pwd = process.argv[3];
 
 if(process.argv.length !== 4) {
-  console.error('命令行格式：cmd username password');
+  console.error('usage：cmd username password');
   process.exit(1);
 }
 
 log('user name: %s\npassword: %s', usr, pwd);
 
-const buf = Buffer.from(usr + ':' + pwd);
+// method A
+log('Base64:', btoa(usr + ':' + pwd));
 
+// method B
+const buf = Buffer.from(usr + ':' + pwd);
 log('Base64:', buf.toString('Base64'));

06-buffer/02-encode.js

@@ -1,12 +1,19 @@
 #!/usr/bin/env node
 
 if(process.argv.length !== 3) {
-  console.error('命令行格式：cmd base64_string');
+  console.error('usage：cmd base64_string');
   process.exit(1);
 }
 
+// method A
+const buf = atob(process.argv[2]);
+const info = buf.split(':');
+
+// method B
+/*
 const buf = Buffer.from(process.argv[2], 'base64');
 const info = buf.toString('utf8').split(':');
+*/
 
 if(info.length !== 2) {
   console.error('信息有误！');