47

我正在尝试捕获与表单一起发送的文件并在保存之前对其执行一些操作。所以我需要在临时目录中创建这个文件的副本,但我不知道如何访问它。Shutil 的函数无法复制此文件,因为它没有路径。那么有没有办法以其他方式进行此操作?

我的代码:

    image = form.cleaned_data['image']
    temp = os.path.join(settings.PROJECT_PATH, 'tmp')
    sourceFile = image.name # without .name here it wasn't working either
    import shutil
    shutil.copy(sourceFile, temp)

这引发了:

Exception Type: IOError at /
Exception Value: (2, 'No such file or directory')

和调试:

#  (..)\views.py in function

  67. sourceFile = image.name
  68. import shutil
  69. shutil.copy2(sourceFile, temp) ...

# (..)\Python26\lib\shutil.py in copy2

  92. """Copy data and all stat info ("cp -p src dst").
  93.
  94. The destination may be a directory.
  95.
  96. """
  97. if os.path.isdir(dst):
  98. dst = os.path.join(dst, os.path.basename(src))  
  99. copyfile(src, dst) ... 
 100. copystat(src, dst)
 101.

▼ Local vars
Variable    Value
dst     
u'(..)\\tmp\\myfile.JPG'
src     
u'myfile.JPG'
# (..)\Python26\lib\shutil.py in copyfile

  45. """Copy data from src to dst"""
  46. if _samefile(src, dst):
  47. raise Error, "`%s` and `%s` are the same file" % (src, dst)
  48.
  49. fsrc = None
  50. fdst = None
  51. try:
  52. fsrc = open(src, 'rb') ...
  53. fdst = open(dst, 'wb')
  54. copyfileobj(fsrc, fdst)
  55. finally:
  56. if fdst:
  57. fdst.close()
  58. if fsrc:

▼ Local vars
Variable    Value
dst     
u'(..)\\tmp\\myfile.JPG'
fdst    
None
fsrc    
None
src     
u'myfile.JPG'
4

5 回答 5

62

是类似的问题,它可能会有所帮助。

import os
from django.core.files.storage import default_storage
from django.core.files.base import ContentFile
from django.conf import settings

data = request.FILES['image'] # or self.files['image'] in your form

path = default_storage.save('tmp/somename.mp3', ContentFile(data.read()))
tmp_file = os.path.join(settings.MEDIA_ROOT, path)
于 2010-09-13T23:16:28.050 回答
28

正如@Sławomir Lenart所提到的,在上传大文件时,您不希望使用data.read().

来自Django 文档

循环UploadedFile.chunks()而不是使用read()可确保大文件不会占用系统内存

from django.core.files.storage import default_storage

filename = "whatever.xyz" # received file name
file_obj = request.data['file']

with default_storage.open('tmp/'+filename, 'wb+') as destination:
    for chunk in file_obj.chunks():
        destination.write(chunk)

除非另有说明,否则这将MEDIA_ROOT/tmp/按照您的意愿保存文件。default_storage

于 2015-05-12T15:41:17.427 回答
8

这是使用 python 的另一种方法mkstemp

### get the inmemory file
data = request.FILES.get('file') # get the file from the curl

### write the data to a temp file
tup = tempfile.mkstemp() # make a tmp file
f = os.fdopen(tup[0], 'w') # open the tmp file for writing
f.write(data.read()) # write the tmp file
f.close()

### return the path of the file
filepath = tup[1] # get the filepath
return filepath
于 2013-08-19T23:02:52.917 回答
5

您最好的做法是编写自定义上传处理程序。请参阅文档。如果添加“file_complete”处理程序,则无论有内存文件还是临时路径文件,都可以访问文件的内容。您还可以使用“receive_data_chunck”方法并在其中写入您的副本。

问候

于 2010-09-13T16:50:30.673 回答
3

这就是我尝试在本地保存文件的方式

    file_object = request.FILES["document_file"]
    file_name = str(file_object)
    print(f'[INFO] File Name: {file_name}')
    with open(file_name, 'wb+') as f:
        for chunk in file_object.chunks():
            f.write(chunk)
于 2020-05-30T07:09:04.857 回答