在IndexedDB中保存ArrayBuffer

问题描述

如何将二进制数据（在ArrayBuffer对象中）保存到IndexedDB中？

IndexedDB规范没有提到ArrayBuffer - 这是否意味着不被支持（我必须将ArrayBuffer打包为一个字符串或一个数组？

解决方案

在FF的最新版本（每晚）中，这非常简单。请参阅。

  window.BlobBuilder = window.BlobBuilder || window.WebKitBlobBuilder || 
 window.MozBlobBuilder; 
 
 var bb = new BlobBuilder（）; 
 bb.append（arrayBuffer）; 
 var myblob = bb.getBlob（）; 
 
 indexedDB.open（mydatabase）。onsuccess = function（e）{
 var db = e.result; 
 var trans = db.transaction（[objectstore1，objectstore2，READ_WRITE）; 
 trans.objectStore（objectstore1）。put（myblob，somekey）; 
 trans.objectStore（objectstore2）。put（myblob，otherkey）; 
}; 
  

偶：

  objectStore.put（{name：Santa，age：400，height：185，img：myblob}）; 
  

在Chrome中有相同的开放式错误：

How can I save binary data (in an ArrayBuffer object) into IndexedDB?

The IndexedDB spec doesn't mention ArrayBuffer - does that mean that is not supported (and I have to pack ArrayBuffer as a string or a an array?).

解决方案

In the latest (nightly) builds of FF this is very easy. See this bug.

window.BlobBuilder = window.BlobBuilder || window.WebKitBlobBuilder ||
                     window.MozBlobBuilder;

var bb = new BlobBuilder();
bb.append(arrayBuffer);
var myblob = bb.getBlob();

indexedDB.open("mydatabase").onsuccess = function(e) {
  var db = e.result;
  var trans = db.transaction(["objectstore1", "objectstore2", READ_WRITE);
  trans.objectStore("objectstore1").put(myblob, "somekey");
  trans.objectStore("objectstore2").put(myblob, "otherkey");
};

even:

objectStore.put({ name: "Santa", age: 400, height: 185, img: myblob});

There's an open bug for the same in Chrome: crbug.com/108012

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