Flask路由与请求对象

什么是路由？
在web开发中，“route”是指根据url分配到对应的处理程序。

——来源知乎-贺师俊

路由注册

from flask import Flask #从flask包中引入Flask类
app = Flask(__name__)

@app.route("/")
def hello():
   return "Hello test"

@app.route("/my/<user_name>")
def my(user_name):
   return "my pages:%s"%user_name


if __name__ == "__main__":
   app.run(host = "0.0.0.0",debug=True)

def hello():
    return "Hello test"
app.add_url_rule(rule = "/test",view_func= hello)

蓝图:

可以分成两个文件，一个里面放主函数，为程序运行入口，还有flask对象注册，将蓝图注册到flask对象中，url_prefix参数可以理解为注册根目录，另一个文件中通过route装饰器来创建子目录响应。详情见获取请求对象和POST参数。

from flask import Flask,Blueprint
app = Flask(__name__)

index_page = Blueprint("index_page",__name__)
@index_page.route("/")
def index_page_index():
    return "index_page"

app.register_blueprint(index_page,url_prefix = "/test")

@app.route("/")
def hello():
    return "hello test"



if __name__ == "__main__":
    app.run(host = "0.0.0.0",debug=True)

解读HTTP请求流程

获取请求对象的GET和POST参数

main.py

# -*- coding: utf-8 -*-
from flask import Flask

from page1 import index_page

app = Flask( __name__ )

app.register_blueprint( index_page,url_prefix ="/test" )


if __name__ == "__main__":
    app.run( host = "0.0.0.0",debug=True )

page1.py

# -*- coding: utf-8 -*-
from flask import Flask,Blueprint,request

index_page = Blueprint( "index_page",__name__)

@index_page.route( "/" )
def index_page_index():
    return "index page1"


@index_page.route( "/me" )
def hello():
    return "hello ,I Love Imooc"


@index_page.route("/get")
def get():
   # var_a = request.args.get( "a","i love imooc" )

    req = request.values
    var_a = req["a"] if  "a" in req else 'i am test' #三元运算式

    return "request:%s,params:%s,var_a:%s"%(request.method,request.args,var_a )

# @index_page.route("/post",methods = ["POST"])
# def post():
#      var_a = request.form['a']
#      return "request:%s,params:%s,var_a:%s"%(request.method,request.form,var_a)

@index_page.route("/post",methods = [ "POST" ])
def post():
    # var_a = request.form['a'] if 'a' in request.form else ''

    # var_a = ""
    # if 'a' in request.form:
    #     var_a = request.form["a"]

    req = request.values
    var_a = req["a"] if "a" in req else 'i am test'
    return "request:%s,params:%s,var_a:%s"%( request.method,request.form,var_a )

@index_page.route("/upload",methods = ["POST"])
def upload():
    f = request.files['file'] if "file" in request.files else None
    return "request:%s,params:%s,file:%s"%( request.method,request.files,f)