解码在Javascript中编码为缓冲区的文件

Question

I am downloading an item from an S3 bucket using getObject. I am able to receive the object as a JSON object with the correct ContentType of 'image/jpeg'. The picture data is encoded as in something I am not familiar with. It starts with

<Buffer ff d8 ff e0 00 10 4a 46

And goes on for a large number of lines. Calling JSON.stringify on the entire object converts the

"type": "Buffer",
      "data": [
        137,80,78,71,13,10,26,10,

I am not familiar with how I should decode this in order to display an image given the ContentType information and the image data. How do I convert the data into an image that I can display using a URL source tag?

I don't want to display the image directly from the source because I am trying to download the image and save it to local storage for display when the user is offline.

The image will be displayed in a react-native application using the component.

Answer 1

您将需要在本地编写它，或者使用具有正确mimetype的流直接发送它。