图片上传到 s3 不渲染 [英] Image upload to s3 does not render

问题描述

我正在使用 Expo Image Picker 将裁剪后的图像发送到 s3.该文件正在上传，但它不会呈现为图像，因为它未被识别为图像.如果我获取 blob 数据并在 base64 到图像编码器中使用它，我会得到图像，所以它必须是基于 mime 或编码的，这就是我所拥有的.

I am using Expo Image Picker to send a cropped image to s3. The file is being uploaded, but it does not render as an image as its not recognised as one. If I took the blob data and use it in a base64 to image encoder I get the image, so it must be mime or encoding based, here is what I have.

我调用 Expo Image Picker:

I invoke the Expo Image Picker with;

let pickerResult = await ImagePicker.launchImageLibraryAsync({
  allowsEditing: true,
  aspect: [1, 1],
  base64: true,
  exif: false,
});

我用来从 s3 SDK 创建签名 URL 的参数是；

The params I use to create the signed URL from s3 SDK are;

const params = {
    Bucket: 'images,
    Key: 'filename.jpg',
    Expires: 60 * 5,
    ACL: 'public-read',
    ContentEncoding: 'base64',
    ContentType: 'image/jpeg'
};

上传是用axios完成的，头文件如下；

The upload is done with axios with the following headers;

const config = { 
                  headers: {
                    'x-amz-acl' : 'public-read', 
                    'Content-Encoding': 'base64',
                    'Content-Type': 'image/jpeg'
                  }
                };

return await axios.put(`${signedURL}`,
  base64data,
  config)
    .then(response => {
      console.log('IMAGE UPLOAD SUCCESS');
      return response.data;
    })

如果我将创建的 .jpg 文件更改为 .txt 并在 sublime 中查看它，则数据是 base64 编码的字符串，而不是 jpeg 的通常 blob 数据.

If I change the created .jpg file as .txt and view it in sublime the data is the base64 encoded string rather than the usual blob data of a jpeg.

我做错了什么?

推荐答案

好的；找到了解决办法；

Ok; found the solution;

使用缓冲 npm 模块；

use the buffer npm module;

从缓冲区"导入{缓冲区}；

import { Buffer } from 'buffer';

将此添加到我的函数中

return await axios.put(`${signedURL}`,
      new Buffer(base64data, 'base64'), // make this a buffer
      config)
        .then(response => {
          console.log('IMAGE UPLOAD SUCCESS');
          return response.data;
        })

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