擅长:python、mysql、java
<p><a href="https://developer.mozilla.org/en-US/docs/Web/API/Blob" rel="nofollow noreferrer">Blobs</a>不是要由URI远程检索的实际文件。相反,它们是编程生成的psuedo url,映射到二进制数据,以便给浏览器一些参考。一、 e.没有<code><img></code>属性来提供原始数据,因此您可以创建一个blob地址来将该数据映射到标准的<code>src</code>属性。在</p>
<p>从上面链接的MDN页面:</p>
<blockquote>
<p>The only way to read content from a Blob is to use a FileReader. The following code reads the content of a Blob as a typed array.</p>
</blockquote>
<pre><code>var reader = new FileReader();
reader.addEventListener("loadend", function() {
// reader.result contains the contents of blob as a typed array
});
reader.readAsArrayBuffer(blob);
</code></pre>