formato MongoDB BSON pode ser usado para armazenar o tamanho do arquivo binário é menos de 16M, é adequado para armazenar os recursos da web nas fotos, olhar para o método de gravação de operação BSON formato
gravação de arquivos local Pymongo / Pymongo de dados de escrita de volta para um arquivo local
"""
@File : file_demo.py
@Description : 本地文件写入Pymongo/Pymongo数据写回本地文件
@Time : 2020/4/7 23:20
@Author : DexterLien
@Email : [email protected]
@Software : PyCharm
"""
import os
from pymongo import MongoClient
# 连接带有密码认证的Mongodb,格式如下:
# mongodb://用户名:密码@服务器地址/数据库名
con = MongoClient('mongodb://username:[email protected]:8017/dexter')
# 使用名为dexter的数据库
db = con['dexter']
# 使用名为users的collection
users = db['users']
# 本地文件以BSON二进制写入数据库集合
fpath = os.path.join(os.getcwd(), 'pic.png')
with open(fpath, 'rb') as file:
users.insert_one({
'name': 'pic.png',
'data': file.read()
})
# 数据库中的BSON数据写回文件
ret = users.find_one({'name': 'pic.png'})
with open(os.path.join(os.getcwd(), 'new.png'), 'wb') as file:
file.write(ret.get('data'))
POST upload de fotos e anexos escrever MongoDB retorno
linha de balão e com apenas um demo, gravado sobre a idéia principal
"""
@File : post_pic.py
@Description : POST上传的图片附件写入Mongodb与返回
@Time : 2020/4/7 23:59
@Author : DexterLien
@Email : [email protected]
@Software : PyCharm
"""
from flask import Flask, request, render_template, jsonify, make_response
from pymongo import MongoClient
from werkzeug.datastructures import FileStorage
app = Flask(__name__)
app.config['JSON_AS_ASCII'] = False
def save_to_mongo(file: FileStorage):
"""
将post请求中的文件对象保存至Mongodb,主要是通过file.stream.read()方法直接将二进制数据读出来,给Mongodb插入用
:param file:
:return:
"""
con = MongoClient('mongodb://username:[email protected]:8017/dexter')
db = con['dexter']
users = db['users']
users.insert_one({
'name': file.filename,
'data': file.stream.read()
})
@app.route('/', methods=['GET', 'POST'])
def index():
if request.method == 'GET':
return render_template('index.html')
if request.method == 'POST':
file = request.files.get('pic')
save_to_mongo(file)
return jsonify({
'code': 0,
'msg': '上传成功'
})
@app.route('/pic/<filename>', methods=['GET'])
def pic(filename):
con = MongoClient('mongodb://username:[email protected]:8017/dexter')
db = con['dexter']
users = db['users']
data = users.find_one({'name': filename})['data']
# 使用Mongodb查询到的BSON数据生成response响应,后面通过设置不同的headers实现不同响应行为
response = make_response(data)
# 在浏览器中直接显示图片
response.headers.set('Content-Type', 'image/png')
# 以文件下载方式返回
# response.headers.set(
# 'Content-Disposition', 'attachement', filename=f'{filename}'
# )
return response
if __name__ == '__main__':
app.run(debug=True)
página de upload
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
{# 注意:Flask中需要指定form的enctype才能将文件封装发送到post请求中 #}
<form method="post" enctype=multipart/form-data>
<input name="pic" type="file">
<button type="submit">上传</button>
</form>
</body>
</html>
