Python Django UnicodeDecodeError“；utf-8 can'；t解码0位置的字节0x89“；发送base64编码字符串时

我正在发送带有以下JavaScript代码的base64编码字符串：

decodeURIComponent(escape(window.btoa(body.profile_image)))

在后端，我使用的是来自的Base64ImageField

当我从客户端发送图像时，它抛出错误500:internalserver Error，并显示以下消息：

Traceback (most recent call last):
  File "/app/.heroku/python/lib/python3.5/site-packages/django/core/handlers/exception.py", line 39, in inner
    response = get_response(request)
  File "/app/.heroku/python/lib/python3.5/site-packages/django/core/handlers/base.py", line 217, in _get_response
    response = self.process_exception_by_middleware(e, request)
  File "/app/.heroku/python/lib/python3.5/site-packages/django/core/handlers/base.py", line 215, in _get_response
    response = response.render()
  File "/app/.heroku/python/lib/python3.5/site-packages/django/template/response.py", line 109, in render
    self.content = self.rendered_content
  File "/app/.heroku/python/lib/python3.5/site-packages/rest_framework/response.py", line 72, in rendered_content
    ret = renderer.render(self.data, accepted_media_type, context)
    separators=separators
  File "/app/.heroku/python/lib/python3.5/site-packages/rest_framework/renderers.py", line 103, in render
  File "/app/.heroku/python/lib/python3.5/json/__init__.py", line 237, in dumps
    **kw).encode(obj)
    chunks = self.iterencode(o, _one_shot=True)
  File "/app/.heroku/python/lib/python3.5/json/encoder.py", line 256, in iterencode
  File "/app/.heroku/python/lib/python3.5/json/encoder.py", line 198, in encode
    return _iterencode(o, 0)
  File "/app/.heroku/python/lib/python3.5/site-packages/rest_framework/utils/encoders.py", line 54, in default
    return obj.decode('utf-8')
UnicodeDecodeError: 'utf-8' codec can't decode byte 0x89 in position 0: invalid start byte

只要我读过-我需要将我的图像编码到base64，然后base64图像字段将负责解码。真正令人惊讶的是，图像被更新了，但仍然抛出错误，这真的很奇怪。

---

我尝试了一些其他编码，但它仍然抛出错误500

该字段是否将图像保存为数据库中的Base64文本？如果是这样，不要使用它，根本不要将文件保存到数据库中。REST响应处理程序无法将数据解码为UTF-8，可能是图像。也许您需要教序列化程序如何将图像作为Base64数据返回？（不知道如何处理您正在使用的任何Django扩展）。

Traceback (most recent call last):
  File "/app/.heroku/python/lib/python3.5/site-packages/django/core/handlers/exception.py", line 39, in inner
    response = get_response(request)
  File "/app/.heroku/python/lib/python3.5/site-packages/django/core/handlers/base.py", line 217, in _get_response
    response = self.process_exception_by_middleware(e, request)
  File "/app/.heroku/python/lib/python3.5/site-packages/django/core/handlers/base.py", line 215, in _get_response
    response = response.render()
  File "/app/.heroku/python/lib/python3.5/site-packages/django/template/response.py", line 109, in render
    self.content = self.rendered_content
  File "/app/.heroku/python/lib/python3.5/site-packages/rest_framework/response.py", line 72, in rendered_content
    ret = renderer.render(self.data, accepted_media_type, context)
    separators=separators
  File "/app/.heroku/python/lib/python3.5/site-packages/rest_framework/renderers.py", line 103, in render
  File "/app/.heroku/python/lib/python3.5/json/__init__.py", line 237, in dumps
    **kw).encode(obj)
    chunks = self.iterencode(o, _one_shot=True)
  File "/app/.heroku/python/lib/python3.5/json/encoder.py", line 256, in iterencode
  File "/app/.heroku/python/lib/python3.5/json/encoder.py", line 198, in encode
    return _iterencode(o, 0)
  File "/app/.heroku/python/lib/python3.5/site-packages/rest_framework/utils/encoders.py", line 54, in default
    return obj.decode('utf-8')
UnicodeDecodeError: 'utf-8' codec can't decode byte 0x89 in position 0: invalid start byte