创建 app.py (flask默认会运行app.py文件)
from flask import Flask
from markupsafe import escape
app = Flask(__name__)
@app.route('/')
def index():
return 'Index Page'
定义多个路由
@app.route('/hello')
def hello():
return 'Hello, World'
@app.route('/about')
def about():
return 'About Page'
路由变量约束
接受变量类型:
- string,默认类型,接受任何字符串(斜杠除外)
- int,接受整数;
- float,接受浮点数;
- path,类似字符串(包括斜杠);
- uuid,接受UUID;
@app.route('/post/<int:post_id>')
def show_post(post_id):
return 'Post: %d' % post_id
@app.route('/user/<username>')
def show_user(username):
return 'User: %s' % escape(username)
@app.route('/path/<path:subpath>')
def show_path(subpath):
return 'Subpath: %s' % escape(subpath)
@app.route('/product/<float:price>')
def show_price(price):
return 'Price: %f' % price
请求响应:
访问:http://localhost:5000/post/12
输出:Post: 12
访问:http://localhost:5000/post/hello
输出:Not Found
访问:http://localhost:5000/user/peng
输出:User: peng
访问:http://localhost:5000/user/peng/lee
输出:Not Found
访问:http://localhost:5000/path/hello
输出:Subpath: hello
访问:http://localhost:5000/path/hello/jim
输出:Subpath: hello/jim
访问:http://localhost:5000/product/12
输出:Not Found
访问:http://localhost:5000/product/12.0
输出:Price: 12.000000