django通过fdfs上传，下载文件

1.继承django的Storage类，重写open，save和exist方法

from django.core.files.storage import Storage
from fdfs_client.client import Fdfs_client

class FDFSStorage(Storage):
    def open(self, name, mode='rb'):
        pass

    def save(self, name, content, max_length=None):

        client = Fdfs_client('./utils/fdfs/client.conf')

        res = client.upload_by_buffer(content.read())

        if res.get('Status') != 'Upload seccessed':
            raise Exception('上传文件到fdfs服务器失败')

        filename = res.get('Remote file_id')

        return filename

    def exists(self, name):
        return False

　　　　def url(self, name):
　　　　return 'http://192.168.5.135:8888/'+name