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将Base64字符串保存到Django ImageField中

分类: 技术问答 • 2022-03-26 21:39:48

将Base64字符串保存到Django ImageField中

问题描述：

我正在做一个在服务器端使用Django的应用程序.

Im doing an application that uses Django in server-side.

我正在尝试这样做:

import uuid
from base64 import b64decode
from django.core.files.base import ContentFile    
@staticmethod
        def add_photo(user, person, image_base64):
            photo = DatabasePersonPhoto()
            photo.user = user
            photo.person = person
            image_data = b64decode(image_base64)
            image_name = str(uuid.uuid4())+".jpg"
            photo.image = ContentFile(image_data, image_name)
            photo.save()
            return photo

这是我的Base64字符串:

This is my Base64 String:

数据:图像/JPEG; BASE64，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 + pvuNjy/LKiAAo2b9Ky8/DXTo/BHkNIF6hJALq10QAOtA9O2xwdSttWMsjclnkoXRuG9e1hfJp2lypJAIPI2SNtyL9fbCmjeH/ABfqU5 +LH0OUXWFFDnOjkCVA0RZoXnWsLV48cEw47LHOoqUtKQAVHcmh1JN56dWjOFTi3yFXZUNyR63i0tTPwi6rejlBXhrxotCnvwCWEJAJBABIrsLvMNI4b12CpDczS5sYvLpvnZUOY7DYEb51ZM17SSwG0cwpQAKT19j85lO1DT5LDCkPoRIbPmIQAFFQH8dcFOvUlFxawXhXSdzknxfYcj6VpMV1Cm3EcxIKaIJJO4yvGEfc6TezZOd3cR8M8L8a6UlrWYDL6kcpUofa4k2LpQ3HTp0wHrX + N/w51eE4rTvqdKkOJoLac5kgbncG8b0OqjRpKm1kBqWqtTecZx + g98eNUUkXQy/TY/07QdM0OZNi8Qu6pKbBLDDTIQNunMbP7V16isoWVGdhSHGHk8q0EpPpYOOqrGp2l6OEbedr/iRXxixunYVeLJuE2lq6LwzpsZDYfYRIfABVzWQMIam43EjnlBaTQISlAAPpnsKS22klLhUALJI67b75hpkZzU9Rbc + nVIJVUZhAJU8obXVf0juT1xKSbauZ6m3lnuiakNIjJmTQlUuRYisUSo9geor2 + byQ6A1KjL + sfdWqW + ac5lgggiwE7WB2u98cxeFmIj/1 + qyfqpCgQq2 + UhVikJ6Ght1sbbAYQYmxIkkLBVLmEABhkcxR2ANdB7nBTd3tj/paOFdkkix5ioRcLKqAHILqqG +/f5yNz5khxSmm3A04jZTZJBG938Uccp40mxdRah6nCeiNuggEmwR/克+ uNOJIcfUpSJkRxTbvRRB2I3NE9 + 1ZW + 12ZZJtXBumyFcxbcKklLgNlVi67d + 5zfGmTI8x54uKIJoGwaA7fvg + FF/D3Ww4 + pSngUkkgcvYAdqr/AKw3ougJfWFOzFKTy1d0D6 +/tkyeD0UG9F1CWgh1laisH7z2I7gj2yVfiKhF81skIWilJBICT3Irt7Y20SHp + nspZSRzEkgCiPTfr74UdgN19RGVdgA7bE/xlEk3cs3ixCeHuJ1aRqkuG8oLaU5a2lncg9CN9vg7H2vK08buG9Ekz3NT0ttDLjxtXJ0UT6jsfXpk + 8S + EJRKNW0fnTLjHnKS4AFp7g2K39T0oZVnGs16RGiatHBU2SUvoNnkWDSgfS6se94aMXFqUXgiE2m0VsvTZzKy2uI4SDsQD0xZO29TQtAU2sJHptiw3Wn + 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图像文件已生成，但我无法像图像一样打开它.

The image file is generated, but I cant open it like an image.

答

我认为这是在django 1.10中尝试并测试过的最佳方法.基于此SO答案: https://*.com/a/28036805/6143656

I think this will be a best approach tried it and tested in django 1.10. based on this SO answer: https://*.com/a/28036805/6143656

我为解码的base64文件创建了一个函数.

I made a function for decoded base64 file.

def decode_base64_file(data):

    def get_file_extension(file_name, decoded_file):
        import imghdr

        extension = imghdr.what(file_name, decoded_file)
        extension = "jpg" if extension == "jpeg" else extension

        return extension

    from django.core.files.base import ContentFile
    import base64
    import six
    import uuid

    # Check if this is a base64 string
    if isinstance(data, six.string_types):
        # Check if the base64 string is in the "data:" format
        if 'data:' in data and ';base64,' in data:
            # Break out the header from the base64 content
            header, data = data.split(';base64,')

        # Try to decode the file. Return validation error if it fails.
        try:
            decoded_file = base64.b64decode(data)
        except TypeError:
            TypeError('invalid_image')

        # Generate file name:
        file_name = str(uuid.uuid4())[:12] # 12 characters are more than enough.
        # Get the file name extension:
        file_extension = get_file_extension(file_name, decoded_file)

        complete_file_name = "%s.%s" % (file_name, file_extension, )

        return ContentFile(decoded_file, name=complete_file_name)

然后您可以调用该函数

import decode_base64_file

p = Post(content='My Picture', image=decode_based64_file(your_base64_file))
p.save()

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