Flask Restful

video 99 API规范

 1 from flask_restful import Api,Resource
 2 
 3 app = Flask(__name__)
 4 api = Api(app)
 5 
 6 
 7 @app.route('/')
 8 def hello_world():
 9     return 'Hello World!'
10 
11 class LoginView(Resource):
12     def post(self):
13         return {"username":"zhiliao"}
14 api.add_resource(LoginView,'/login/', endpoint="login")

video 101 

 检查表单:

先引入“from flask_restful import Api,Resource,reqparse”

1 class LoginView(Resource):
2     def post(self):
3         parser = reqparse.RequestParser()
4         parser.add_argument('user', type=int,help='用户名错误')
5         args = parser.parse_args()
6         print(args)
7 
8         return {"username":"zhiliao"}
9 api.add_resource(LoginView,'/login/', endpoint="login")

然后用postman去模拟:

因为我们把user设置为int型,所以提示了help中的内容。

 

video 102 flask-restful标准化返回参数

1,最简单的API写法:

 1 from flask_restful import Api,Resource
 2 app = Flask(__name__)
 3 api = Api(app)
 4 
 5 @app.route('/')
 6 def hello_world():
 7     return 'Hello World!'
 8 
 9 class ArticleView(Resource):
10     def get(self):
11         return {"article":"xxx","title":"aaa"}
12 api.add_resource(ArticleView,'/article/',endpoint = 'article')

2,返回值定义

 1 from flask_restful import Api,Resource,fields,marshal_with
 2 app = Flask(__name__)
 3 api = Api(app)
 4 
 5 @app.route('/')
 6 def hello_world():
 7     return 'Hello World!'
 8 
 9 class ArticleView(Resource):
10     resource_fields = {
11         'article':fields.String,
12         'title':fields.String,
13     }
14 #marshal_with作用:连接resource_fields到视图。
15 #因为在resource_fields中定义好了返回的参数,即使这个参数没有值,也会返回,但返回一个None
16 #以上写法才是标准API
17     @marshal_with(resource_fields)
18     def get(self):
19         return {"article":"xxx","title":"aaa"}
20 api.add_resource(ArticleView,'/article/',endpoint = 'article')

以上是返回字典,下面讲返回模型:

3,返回模型

 1 from flask import Flask
 2 from flask_restful import Api,Resource,fields,marshal_with
 3 app = Flask(__name__)
 4 api = Api(app)
 5 
 6 @app.route('/')
 7 def hello_world():
 8     return 'Hello World!'
 9 
10 #建立模型
11 class Article(object):
12     def __init__(self,article,title):
13         self.article = article
14         self.title = title
15 article = Article(article='book1',title='chapter2')
16 
17 class ArticleView(Resource):
18     resource_fields = {
19         'article':fields.String,
20         'title':fields.String,
21     }
22 #marshal_with作用:连接resource_fields到视图。
23 #因为在resource_fields中定义好了返回的参数,即使这个参数没有值,也会返回,但返回一个None
24 #以上写法才是标准API
25     @marshal_with(resource_fields)
26     def get(self):
27         # return {"article":"xxx","title":"aaa"}
28 #Note:这里返回实例化对象就行。
29         return article
30 api.add_resource(ArticleView,'/article/',endpoint = 'article')

29这里直接返回一个实例化后的模型就行。效果和之前一样:

video 103 标准化用法(开发过程中)

 

video 104 渲染模板

1 from flask_restful import Api,Resource
2 app = Flask(__name__)
3 api = Api(app)
4 
5 class ListView(Resource):
6     def get(self):
7         return render_template("index.html")
8 api.add_resource(ListView,'/list/',endpoint='list')

在restful下渲染html。

结果发现:

那么,如何解决这个问题呢?

因为restful返回的时候都是倒数第二个json形式,所以出现上面的形式,参考下表:

所以我们需要修改他为html代码,就应该改为第一种html形式。

 1 from flask import Flask,render_template,make_response
 2 from flask_restful import Api,Resource
 3 app = Flask(__name__)
 4 api = Api(app)
 5 
 6 #修改返回的类型
 7 @api.representation('text/html')
 8 def output_html(data,code,headers):
 9     print(data)
10     #在representation装饰的函数中必须返回一个Response对象。
11     # resp = make_response('hello')
12     resp = make_response(data)
13     return resp
14 
15 class ListView(Resource):
16     def get(self):
17         return render_template("index.html")
18 api.add_resource(ListView,'/list/',endpoint='list')

原文地址:https://www.cnblogs.com/two-peanuts/p/11378536.html