Azure文件存储内容类型始终为应用程序/八位字节流

问题描述

当我使用共享访问签名(SAS)令牌.该文件将在浏览器中下载，但是content-type始终是application/octet-stream，而不是进行更改以匹配该文件的mime类型.如果我将文件放入Azure BLOB存储中，并使用SAS令牌构建URL，它将为我的文件发送正确的内容类型(图像/jpeg).

I'm currently having issue with Azure File storage when I build up a URL with a shared access signature (SAS) Token. The file will download in the browser, but the content-type is always application/octet-stream rather than changing to match the mime type of the file. If I put the file in Azure BLOB storage and build up a URL with a SAS Token, it sends the correct content-type for my file (image/jpeg).

我认为这是问题所在，但已将存储帐户从V1升级到V2，但是并不能解决问题.

I've upgraded my storage account from V1 to V2 thinking that was the problem, but it didn't fix it.

有人知道我可以尝试做些什么，以使Azure文件存储能够使用带有SAS令牌的URL返回正确的内容类型来下载文件吗?

Does anyone have a clue what I could try that might get Azure File storage to return the correct content-type using a URL with SAS Token to download the file?

推荐答案

如果未提供任何内容，则Azure Blob会降至"application/octet-stream"的默认值.为了获得正确的模仿类型，这是我对烧瓶应用程序所做的:

Azure blob falls to the default value of 'application/octet-stream' if nothing is provided. To get the correct mimetypes, this is what I did with my flask app:

@app.route('/', methods=['GET', 'POST'])
def upload_file():
        if request.method == 'POST':
            f = request.files['file']
            mime_type = f.content_type
            print (mime_type)
            print (type(f))
            try:
                blob_service.create_blob_from_stream(container, f.filename, f,
                content_settings=ContentSettings(content_type=mime_type))
            except Exception as e:
                print (str(e))
                pass

mime_type已传递到ContentSettings，以获取上传到天蓝色blob的文件的当前mimetypes.

mime_type was passed to ContentSettings to get the current mimetypes of files uploaded to azure blob.

在nodeJS中:

blobService.createBlockBlobFromStream(容器，blob，流，streamLength，{contentSettings:{contentType:fileMimeType}}，回调)

其中:

fileMimeType 是要上传的文件的类型

fileMimeType is the type of the file being uploaded

回调是您的回调实现

所用方法的参考: https://docs.microsoft.com/zh-cn/javascript/api/azure-storage/azurestorage.services.blob.blobservice.blobservice?view = azure-node-latest#createblockblobfromstream-string--string--stream-可读--number--createblockblobrequest选项--errororresult-blobresult--

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