uwsgi+nginx部署pythonFlask项目

uwsgi + nginx 部署python Flask项目

参考：

https://www.runoob.com/django/django-nginx-uwsgi.html

https://www.jianshu.com/p/6452596c4edb

1.基本流程

# 安装flask$ pip install flask

然后写一个简单的服务，我就写一个控制直播推流的开关

from flask import Flaskapp = Flask(__name__)global status@app.route('/on')def turn_on(): global status status = 1 return 'living server is on!'@app.route('/off')def turn_off(): global status status = 0 return 'living server is off!'@app.route('/status')def live_status(): global status return str(status);if __name__ == '__main__': global status status = 1 ; app.run()

写好之后可以在本地跑起来试试，端口默认5000

然后安装uwsgi

$ pip install uwsgi

在/usr/local路径下建立目录写配置文件uwgsi.ini

(我们新建文件夹uwsgi_script用来放uwsgi信息)

socket = 127.0.0.1:7100chdir = /usr/local/livewsgi-file = server.pycallable = app processes = 4vacuum = truemaster = true

再写nginx配置

server { listen 8080; server_name data.migelab.com; charset utf-8; client_max_body_size 75M; location / { include uwsgi_params; # 导入uwsgi配置 uwsgi_pass 127.0.0.1:7100; # 转发端口，需要和uwsgi配置当中的监听端口一致 uwsgi_param UWSGI_PYTHON /usr/bin/python3; uwsgi_param UWSGI_CHDIR /usr/local/live; # 项目根目录 uwsgi_param UWSGI_script server:app; } }

# 启动nginx./nginx

#启动uwsgiuwsgi --ini /usr/local/live/uwsgi_script/uwsgi.ini &

2.功能升级

主要是升级两个内容：加入使用POST和GET方法；

​ 返回 JSON对象的响应；

​ 管理一个视频流升级为管理多个视频流

JSON格式响应：

参考链接：https://flask.palletsprojects.com/en/1.1.x/api/#flask.Flask.response_class

​ https://blog.csdn.net/weixin_41665106/article/details/105599235

使用JSON格式去响应前端的请求：

@app.route('/on', methods=['POST','GET'])def turn_on(): global status if request.method =='POST': camera = request.form['camera'] print(camera) if camera != KeyError: status[int(camera)] = 1 response = make_response({ 'status':'success', 'code':'200', 'ERROR':'' },200) response.headers={ 'content-type':'JSON' } return response else : response = make_response({ 'status': 'fail', 'code': '400', 'ERROR':'camera code error!' },400) response.headers = { 'content-type': 'JSON' } return response else: response = make_response({ 'status': 'fail', 'code': '500', 'ERROR': 'GET method error!' }, 500) response.headers = { 'content-type': 'JSON' } return response# 解决问题：如何构建响应# 如何带参数

处理异常：

# 异常类global InvalidUsageclass InvalidUsage(Exception): status_code = 400 def __init__(self,message,status_code=400): Exception.__init__(self) self.message = message self.status_code = status_code@app.errorhandler(InvalidUsage)def invalid_usage(error): response = make_response(error.message) response.status_code = error.status_code return response

使用了抛出异常之后，之前的响应代码就简化了许多：

@app.route('/on', methods=['POST','GET'])def turn_on(): global status if request.method =='POST': camera = request.form['camera'] print(camera) if camera != KeyError: status[int(camera)] = 1 response = make_response({ 'status':'success', 'code':'200', 'ERROR':'' },200) response.headers={ 'content-type':'JSON' } return response else : raise InvalidUsage('camera code is inValid or empty', status_code=400) else: raise InvalidUsage('GET method is InValid',status_code = 403)