Flask使用笔记

Flask

简单应用

• 环境搭建

  1.使用envn创建虚拟环境
  
  2.激活虚拟环境，命令行执行scripts中的avtive.bat
  
  3.在vscode中右下角选择创建的虚拟环境编译器
  

• 简单使用

  from flask import Flask, json , request
  
  app = Flask(__name__)
  
  @app.route("/getperson")
  def getperson():
      print("name:" + request.args.get("name"))
      Person={
          "name":"hello",
          "id":123
      }
      return json.dumps(Person);
  app.run(debug=True)
  

• 跨域问题的解决和get post获得参数的方法

  from flask import Flask, json , request
  from flask_cors import CORS,cross_origin
  
  app = Flask(__name__)
  CORS(app, supports_credentials=True,resources=r'/*')
  
  @app.route("/")
  def hello():
      return "hello"
  
  @app.route("/getperson",methods=["GET"])
  def getperson():
      if request.method=="GET":
          print("Get请求")
          Person={};
          Person["name"]=request.values.get("name");
          Person["age"]=request.values.get("age");
          Person["method"]=request.values.get("method");
          return json.dumps(Person);
  
  @app.route("/getpersonPost",methods=['POST'])
  def getpersonPost():
      if request.method=='POST' :
          print("this is post")
          data = request.get_json(force=True)
          print(data)
          Person={}
          Person["name"]= data["name"];
          Person["age"]= data["age"];
          Person["method"]= data["method"];
          return json.dumps(Person);
  
  app.run(debug=True)