Flask - 请求和响应以及中间件
一、请求和响应
1 from flask import Flask 2 from flask import request 3 from flask import render_template 4 from flask import redirect 5 from flask import make_response 6 7 app = Flask(__name__) 8 9 10 @app.route('/login.html', methods=['GET', "POST"]) 11 def login(): 12 13 # 请求相关信息 14 # request.method 15 # request.args 16 # request.form 17 # request.values 18 # request.cookies 19 # request.headers 20 # request.path 21 # request.full_path 22 # request.script_root 23 # request.url 24 # request.base_url 25 # request.url_root 26 # request.host_url 27 # request.host 28 # request.files 29 # obj = request.files['the_file_name'] 30 # obj.save('/var/www/uploads/' + secure_filename(f.filename)) 31 32 # 响应相关信息 33 # return "字符串" 34 # return render_template('html模板路径',**{}) 35 # return redirect('/index.html') 36 37 # response = make_response(render_template('index.html')) 38 # response是flask.wrappers.Response类型 39 # response.delete_cookie('key') 40 # response.set_cookie('key', 'value') 41 # response.headers['X-Something'] = 'A value' 42 # return response 43 44 45 return "内容" 46 47 if __name__ == '__main__': 48 app.run()
二、flask 如何传参数到 js中，避免& # 39等转义
经常会有字符 空格 ' "" 等被转义成其他字符，这其实是特殊字符进行转义,防止js注入
在js中可以利用tojson解决。
比如数组 num = ["ni"]，经过flask的 {{num}}传入js后，就变成了'ni'
解决方法
利用js的tojson
var myGeocode = {{ num|tojson }};
三、中间件
1 from flask import Flask, flash, redirect, render_template, request 2 3 app = Flask(__name__) 4 app.secret_key = 'some_secret' 5 6 @app.route('/') 7 def index1(): 8 return render_template('index.html') 9 10 @app.route('/set') 11 def index2(): 12 v = request.args.get('p') 13 flash(v) 14 return 'ok' 15 16 class MiddleWare: 17 def __init__(self,wsgi_app): 18 self.wsgi_app = wsgi_app 19 20 def __call__(self, *args, **kwargs): 21 22 return self.wsgi_app(*args, **kwargs) 23 24 if __name__ == "__main__": 25 app.wsgi_app = MiddleWare(app.wsgi_app) 26 app.run(port=9999)
