# coding=utf-8
from config import Config
from flask import Flask,jsonify,abort,redirect,url_for
app = Flask(__name__)
app.config.from_object(Config)
# Return json data
import json
@app.route('/' )
def demo1():
my_dict = {"name":"tiantian","age":"10"}
# return json.dumps(my_dict)
# return jsonify(my_dict)
return 'demo1 run'
# return status code, via return returns directly, it can return the status code that does not conform to the http protocol, mainly to realize the data interaction between the front and back ends
@app.route('/status')
def demo2():
return 'demo2:',405 #Enter
the above in the browser 127.0.0.1:5000/status, demo2 appears on the page: You can see that the status code is 405 in the inspection source code
# Exception handling, abort, similar to the raise statement in python, the function is to handle exception information, only the status code that conforms to the http protocol can be thrown, abort As long as the exception is caught, the code behind does not execute
@app.route('/')
def demo3():
abort(404)
return 'demo2:'403
@custom error message errorhandler will capture the exception status code thrown by the abort function
@app.errorhandler(404)
def demo4(e):
return 'page not found , please visit a certain page'
# Redirect, when the project directory or file changes, you need to use redirect www.360buy.com
# When the active page does not exist, it is not recommended to use redirect to direct to a specific url, It is recommended to use dynamic url
# Reverse parsing
@app.route('/redirect')
def demo5():
return redirect('http://www.baidu.com')
# Above when entering 127.0.0.1 in the browser :5000/redirect The page jumps to Baidu
"""
Or write like this
@app.route('/redirect')
def demo5():
a = 'http://www.baidu.com'
return redirect(a)
" "" #Use
url_for, the accepted parameter is the view function name
@app.route('/demo6')
def demo6():
return redirect(url_for('demo5'))
# Above when you enter 127.0.0.1:5000 in the browser, the page can jump to Baidu, it is best to use url_for # The request hook runs @app.after_request def demo7
after each request (response): #When the above two lines and the following three lines are commented out, when you enter 127.0.0.1:5000 in the browser, demo1 run will appear on the page and check the source code as Content-Type as text/html #Modify Response headers if response.headers.get('Content-Type').startswith('text') response.headers['Content-Type'] = 'application/json' return response # Now enter 127.0 in the browser. At 0.1:5000, demo1 run appears on the page and the source code is checked for Content-Type as application/json
if __name__=='__main__':
app.run()
Create the same level file config.py in the same directory
class Config:
DEBUG = True
SECRET_KEY='b1IHqfGBJbdmANeA3Ch/kEjd1jVw7EWifvdPUC8CXyu1+KsAKXnh8boLtjpwAoIOCLM='