DJANGO-使用Progress Bar上传到云（Azure Blob存储）到云

发布于 2025-02-10 01:56:58 字数 1112 浏览 4 评论 0原文

我正在关注 this 当我使用Ajax在Django上载文件时，添加进度栏的教程。当我使用upload_to选项将文件上传到文件夹时，一切正常。但是，当我使用存储选项将文件上传到Azure时 - 它不起作用。即当这是我的模型时：

class UploadFile(models.Model):
    title = models.CharField(max_length=50)
    file=models.FileField(upload_to='files/media/pre')

它的工作原理是完美的，但是当这是我的模型时：

from myAzure import AzureMediaStorage as AMS
class UploadFile(models.Model):
    title = models.CharField(max_length=50)
    file = models.FileField(storage=AMS)

它被卡住而不是进步。（AMS在Morazure.py中定义）：

from storages.backends.azure_storage import AzureStorage

class AzureMediaStorage(AzureStorage):
    account_name = '<myAccountName>'
    account_key = '<myAccountKey>'
    azure_container = 'media'
    expiration_secs = None

我该如何使其起作用？

编辑：如果不清楚：

我的问题不是上传到Azure，而是要显示进度栏。
由于安全原因，我不想从浏览器上传文件，使用CORS和SAS，而是从我的后端上传。

原文

I'm following this tutorial to add a progress bar when I'm uploading a file in Django, using ajax.
When I'm uploading the file to a folder using the upload_to option everything works fine.
But when I'm uploading the file to Azure using the storage option - It doesn't work.
i.e. when this is my model:

class UploadFile(models.Model):
    title = models.CharField(max_length=50)
    file=models.FileField(upload_to='files/media/pre')

It works perfect, but when this is my model:

from myAzure import AzureMediaStorage as AMS
class UploadFile(models.Model):
    title = models.CharField(max_length=50)
    file = models.FileField(storage=AMS)

It gets stuck and not progressing.
(AMS is defined in myAzure.py by):

from storages.backends.azure_storage import AzureStorage

class AzureMediaStorage(AzureStorage):
    account_name = '<myAccountName>'
    account_key = '<myAccountKey>'
    azure_container = 'media'
    expiration_secs = None

How can I make it work?

EDIT:
If it was not clear:

my problem is not to upload to Azure, but to show progress bar.
From security reasons I do not want to upload the file from the browser and to use CORS and SAS but from my backend.

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爱给你人给你 2025-02-17 01:56:58

当一个人将文件上传到特定位置时，为了跟踪上传的当前状态，要么在Python对象周围添加包装器，也可以在上传的地方添加包装器，以提供用于监视的回调。

由于Azure库无法提供该回调，因此可以为对象创建包装器或使用已有的包装器。

Alastair McCormack 命名 tqdm 用包装器可以使用。

AS George John Shows ，一个人可以做这样的事情

size = os.stat(fname).st_size
with tqdm.wrapattr(open(fname, 'rb'), "read", total=size) as data:
    blob_client.upload_blob(data)

When one is uploading a file to a specific place, in order to track the current state of the upload either one adds a wrapper around the Python object or the place where one is uploading to provides a callback for monitoring.

Since the Azure library doesn't provide that callback, one can create a wrapper for the object or use an already existing one.

There's a library suggested by Alastair McCormack named tqdm with such wrapper that one can use.

As George John shows, one can do something like this

size = os.stat(fname).st_size
with tqdm.wrapattr(open(fname, 'rb'), "read", total=size) as data:
    blob_client.upload_blob(data)

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扛刀软妹 2025-02-17 01:56:58

我可以建议尝试本地存储文件的工作，然后上传到Azure。

不确定它是否有效，但至少您可以尝试一下，并确定是否有帮助：

class UploadFile(models.Model):
    title = models.CharField(max_length=50)
    file = models.FileField(upload_to='files/media/pre', null=True, blank=False)
    remote_file = models.FileField(storage=AMS, null=True, blank=True, default=None)

    def save(self, *args, **kwargs):
        if self.file:
            self.remote_file = self.file
            super().save(*args, **kwargs)  # in theory - this should trigger upload of remote_file
            self.file = None 
        super().save(*args, **kwargs)

I can suggest to try the work-around of storing file locally and then upload to Azure.

Not sure if it will work but at least you may give it a try and tell if helps:

class UploadFile(models.Model):
    title = models.CharField(max_length=50)
    file = models.FileField(upload_to='files/media/pre', null=True, blank=False)
    remote_file = models.FileField(storage=AMS, null=True, blank=True, default=None)

    def save(self, *args, **kwargs):
        if self.file:
            self.remote_file = self.file
            super().save(*args, **kwargs)  # in theory - this should trigger upload of remote_file
            self.file = None 
        super().save(*args, **kwargs)

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