refactor(file): use the key generated by the server (#632)

* refactor(utils): create Buffer with Buffer.from

* refactor(file): use the key generated by the server

Author: sdjdd

src/file.js

@@ -9,11 +9,6 @@ const debug = require('debug')('leancloud:file');
 const parseBase64 = require('./utils/parse-base64');
 
 module.exports = function(AV) {
-  const hexOctet = () =>
-    Math.floor((1 + Math.random()) * 0x10000)
-      .toString(16)
-      .substring(1);
-
   // port from browserify path module
   // since react-native packager won't shim node modules.
   const extname = path => {
@@ -484,23 +479,13 @@ module.exports = function(AV) {
           name += this._extName;
           extName = this._extName;
         }
-        // Create 16-bits uuid as qiniu key.
-        const key =
-          hexOctet() +
-          hexOctet() +
-          hexOctet() +
-          hexOctet() +
-          hexOctet() +
-          extName;
         const data = {
-          key,
           name,
           keep_file_name: authOptions.keepFileName,
           ACL: this._acl,
           mime_type: type,
           metaData: this.attributes.metaData,
         };
-        this._qiniu_key = key;
         return AVRequest('fileTokens', null, null, 'POST', data, authOptions);
       },
 

src/uploader/qiniu.js

@@ -17,7 +17,7 @@ module.exports = function(uploadInfo, data, file, saveOptions = {}) {
     headers: file._uploadHeaders,
     data: {
       name: file.attributes.name,
-      key: uploadInfo.key || file._qiniu_key,
+      key: uploadInfo.key,
       token: uptoken,
     },
     onprogress: saveOptions.onprogress,

src/utils/parse-base64.js

@@ -3,7 +3,7 @@ var dataURLToBlob = function(base64) {
   if (base64.split(',')[0] && base64.split(',')[0].indexOf('base64') >= 0) {
     base64 = base64.split(',')[1];
   }
-  return new Buffer(base64, 'base64');
+  return Buffer.from(base64, 'base64');
 };
 
 module.exports = dataURLToBlob;