分布式文件存储系统之小文件上传/下载(python3.8+MongoDB 4.2.3)

参考：

1. Python3 File(文件) 方法
2. MongoDB and PyMongo Tutorial

分布式文件存储环境：
Python3.8，PyMongo 3.10.1，MongoDB 4.2.3

小文件上传方法：

#!/usr/bin/python3
 
from pymongo import MongoClient

# connecting to database. db:testfile, collection:hello 
myclient = MongoClient('mongodb://localhost:40009/')
db = myclient.testfile
collection = db.hello

# open a file to upload
myfile = open(file='D:/workspace/language.pdf',mode='rb')
data = myfile.read()

doc = [{"userid":"5",
        "filename":"language",
        "filettype":"pdf",
        "content":data,
        "size":"3000"
    }]

# insert document
result = collection.insert_many(doc)
print(result)

myfile.close()

---

小文件下载方法：

#!/usr/bin/python3
 
from pymongo import MongoClient

# connecting to database. db:testfile, collection:hello  
myclient = MongoClient('mongodb://localhost:40009/')
db = myclient.testfile
collection = db.hello

# find a file to download with "content" value. Stored in test.pdf 
mydoc = collection.find_one({"userid":"5"},{"_id":0,"content":1})
myfile = open(file='D:/workspace/test.pdf',mode='ab')
data = myfile.write(mydoc["content"])

myfile.close()