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> </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>