django 文件上传（阿里云oss）下载（支持大文件下载）

1.文件上传

Models 设计

class Upload_File(models.Model):
    image = models.FileField(upload_to='file/%Y/%m',default = 'image/default.png',max_length=100)
    add_time = models.DateTimeField(auto_now_add=True,verbose_name='添加时间')

forms 设计

from django import forms
from .models import Upload_File

class UploadFileForm(forms.ModelForm):
    class Meta:
        model = Upload_File
        fields = ['image']

settings设计

STATIC_URL = '/static/'

MEDIA_URL = '/media/'  #文件上传目录
MEDIA_ROOT = os.path.join(BASE_DIR, 'media') #文件上传地址

View设计(上传思路：先保存到本地media目录然后读取目录，保存到云服务器，方法比较笨，但是能实现后期优化)

#阿里云OSS的基本配置
access_key_id = os.getenv('OSS_TEST_ACCESS_KEY_ID', 'LLLLLLLLLL')
access_key_secret = os.getenv('OSS_TEST_ACCESS_KEY_SECRET', 'BBBBBB')
bucket_name = os.getenv('OSS_TEST_BUCKET', 'CCCCC')
endpoint = os.getenv('OSS_TEST_ENDPOINT', 'https://oss-cn-beijing.aliyuncs.com')

# 确认上面的参数都填写正确了
for param in (access_key_id, access_key_secret, bucket_name, endpoint):
    assert '<' not in param, '请设置参数：' + param

# 创建Bucket对象，所有Object相关的接口都可以通过Bucket对象来进行

def GetForm(request):
    """
    请求表单
    """

    file = Upload_File()

    if request.method == 'POST':
        Up_File = UploadFileForm(request.POST, request.FILES)
        if Up_File.is_valid():
            headFile = Up_File.cleaned_data['image']
            file.image = headFile
            print(MEDIA_ROOT)
            file.save()

            print(file.image.name)
            print(file.image.path)

            bucket = oss2.Bucket(oss2.Auth(access_key_id, access_key_secret), endpoint, bucket_name)

            bucket.put_object_from_file('{}/{}'.format('media', file.image.name),'{}/{}'.format('media', file.image.name))

            # # 下载到本地文件
            # bucket.get_object_to_file('media/file/2018/01/1曾经有一份真挚的爱情大话西游经典片段.mp4', 'media/file/2018/01/1曾经有一份真挚的爱情大话西游经典片段.mp4')

        return HttpResponse('{"status":"success"}', content_type='application/json')

URL设计

from django.views.static import serve #用于处理上传文件
from django_upload.settings import MEDIA_ROOT

 # 上传文件
url(r'^form/$', GetForm, name='go_form'),

# 配置上传文件的访问函数
url(r'^media/(?P<path>.*)$', serve, {'document_root': MEDIA_ROOT}),

HTML

     <form action="{% url 'go_form' %}" method="post" enctype="multipart/form-data" class="smart-green">
        <span class="fl upload-inp-box" style="margin-left:70px;">
            <input type="file" name="image" id="avatarUp" class="js-img-up"/>
        </span>
        <label>
            <span>&nbsp;</span> <br><br><br>

            <input type="submit" class="button" value="提交"/> <br><br>

        </label>
        {% csrf_token %}
     </form>

2.文件下载：

View

def file_down(request):
    """
    文件下载
    """
    def readFile(fn, buf_size=262144):
        f = open(fn, "rb")
        while True:
            c = f.read(buf_size)
            if c:
                yield c
            else:
                break
        f.close()

    path = os.path.abspath(MEDIA_ROOT)
    print(path)
　　
　　
　　#文件相对路径
    path = 'media/file/2018/01/遥领医疗数据AI项目商业计划书-20171211.pptx'
    print(path)

    response = StreamingHttpResponse(readFile(path))

    response['Content-Type'] = 'application/octet-stream'
    response['Content-Disposition'] = 'attachment;filename=%s' % (urlquote('遥领医疗数据AI项目商业计划书-20171211.pptx')) #下载后的名字

    return response

url设计

#文件下载
url(r'^file_down/$', file_down, name='file_down'),

HTML

<button>
     <a href="/file_down/">下载</a>
</button>