AWS Chalice从S3返回图像文件

问题描述

我正在使用Chalice构建一个简单的服务器应用程序，该应用程序从S3返回一个图像文件.

I am using Chalice to build a simple severless application which returns an image file from S3.

经过64位编码后，我可以返回文件.但是我想知道如何返回二进制文件，以便用户将其作为文件下载吗?我的以下代码无法正常工作.

I am able to return file after it is 64 bit encoded. But I am wondering how I can return the binary file so that user can take it as a file download? My following code is not working.

@app.route('/binary_object/{bucket}/{key}', methods=['GET', 'PUT'])
def binary_object(bucket, key):
    request = app.current_request
    if request.method == 'GET':
        try:
            file_path = '/tmp/{}_{}'.format(uuid.uuid4(), key)
            s3_client.download_file(bucket, key, file_path)
            file_size = os.path.getsize(file_path)
            headers = {'Content-Disposition': 'attachment; filename=\"' + key + '\"',
                       'Content-Type': 'application/octet-stream',
                       # 'Content-Type': 'image/*',
                       'Content-Length': str(file_size)}

            fsk = open(file_path, 'rb')
            return Response(body=fsk, headers=headers, status_code=200)
        except Exception as e:
            print e
            raise e

推荐答案

圣杯中有一个错误已在2019年5月14日修复:

There was a bug in Chalice that was fixed on 14-May-2019:

https://github.com/aws/chalice/issues/1095

我遇到了与您类似的问题，并且通过获取最新版本的Chalice已解决了该问题.

I had a similar problem to yours and it's been fixed by grabbing the latest version of Chalice.

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