小编lou*_*vno的帖子

通过 Firebase 函数（节点）将转换后的图像 (.jpg) 上传到谷歌存储时，我在元数据选项中设置了 contentType。

return bucket.file(filePath).download({destination: tempFilePath})
  .then(() => {
    console.log('Image downloaded locally to', tempFilePath);
    // Generate a thumbnail using ImageMagick.
    return spawn('convert', [tempFilePath, '-thumbnail', '200x200>', tempFilePath])
    })
  .then(() => {
    console.log('Thumbnail created at', tempFilePath);
    // Add a 'thumb_' prefix to thumbnails file name. That's where we'll upload the thumbnail.
    const thumbFilePath = filePath.replace(/(\/)?([^\/]*)$/, `$1thumb_$2`);
    // Uploading the thumbnail.

    return bucket.upload(tempFilePath, {  destination: thumbFilePath,
                                          metadata: {
                                              metadata: {
                                                contentType: 'image/jpeg',
                                                firebaseStorageDownloadTokens: uuid
                                              }
                                          }
                                        });

当我然后在 Firebase 存储控制台中查看文件时，文件类型被设置为默认的应用程序/八位字节流。检查图像的元数据时，它确实在“其他元数据”中说 …