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我正在尝试通过将图像 android(client) 转换为 base64 字符串来将其发送到 django(server)。我已经收到@服务器端的字符串，解码并重命名它。但是，当我尝试保存图像时它失败了。

这是图像应该存储在服务器上的路径。模型.py

class App(models.Model):
    name = models.CharField(max_length=200)
    #create_date = models.DateTimeField('date created')
    category = models.CharField(max_length=200, null=True)
    app_logo = models.ImageField(upload_to="/root/AR_BROWSER/example/static/uploaded_pics", null=True, blank=True)
    user = models.ForeignKey(App_User)
    def __unicode__(self):
        return self.name

views.py 中的函数

@csrf_exempt    
def create_app(request):
    appName = request.POST['name']
    user = request.POST['userID']
    c = request.POST['category']
    i = request.POST['image']
    imgdata = base64.b64decode(i)
    t = datetime.now()
    filename = t.strftime('%Y%m%d%H%M%S.jpg') 
    with open(filename, 'wb') as f:
        f.write(imgdata)
    u=App_User.objects.get(id=user)
    apps = App.objects.create(name = appName, category=c, user_id = u.id, app_logo=filename)
    apps.save()

    return HttpResponse("You created %s." % apps.name)
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