参考:https://www.jianshu.com/p/6ac1cab17929

参考:https://www.cnblogs.com/alexyuyu/p/6243362.html

参考:http://docs.jinkan.org/docs/flask/quickstart.html.

安装基于REST的Web客户端

1、helloworld的运行

from flask import Flask
# Flask初始化参数尽量使用你的包名,这个初始化方式是官方推荐的,官方解释:http://flask.pocoo.org/docs/0.12/api/#flask.Flask
app = Flask(__name__)
@app.route('/HelloWorld')
def hello_world():
return "Hello World!"
app.run()

2、使用get 方法获取资源

# -*- coding: utf-8 -*-
from flask import Flask, jsonify, abort, make_response
app = Flask(__name__)
articles = [
{
'id': 1,
'title': 'the way to python',
'content': 'tuple, list, dict'
},
{
'id': 2,
'title': 'the way to REST',
'content': 'GET, POST, PUT'
}
]
@app.route('/blog/api/articles', methods=['GET'])
def get_articles():
return jsonify({'articles': articles})
@app.route('/blog/api/articles/<int:article_id>', methods=['GET'])
def get_article(article_id):
article = filter(lambda a: a['id'] == article_id, articles)
if len(article) == 0:
abort(404)
return jsonify({'article': article[0]})
@app.errorhandler(404)
def not_found(error):
return make_response(jsonify({'error': 'Not found'}), 404)
if __name__ == '__main__':
app.run(host='127.0.0.1', port=5632)

在终端输入如下得到结果:

$ curl -i http://localhost:5632/blog/api/articles
HTTP/1.0 200 OK
Content-Type: application/json
Content-Length: 225
Server: Werkzeug/0.12.2 Python/3.6.3
Date: Thu, 22 Mar 2018 15:36:17 GMT {
"articles": [
{
"content": "tuple, list, dict",
"id": 1,
"title": "the way to python"
},
{
"content": "GET, POST, PUT",
"id": 2,
"title": "the way to REST"
}
]
}

3、使用flask的RESTful扩展库

from flask import Flask
from flask_restful import reqparse, abort, Api, Resource
app = Flask(__name__)
api = Api(app)
TODOS = {
'todo1': {'task': 'build an API'},
'todo2': {'task': '哈哈哈'},
'todo3': {'task': 'profit!'},
}
def abort_if_todo_doesnt_exist(todo_id):
if todo_id not in TODOS:
abort(404, message="Todo {} doesn't exist".format(todo_id))
parser = reqparse.RequestParser()
parser.add_argument('task')
# Todo
# shows a single todo item and lets you delete a todo item
class Todo(Resource):
def get(self, todo_id):
abort_if_todo_doesnt_exist(todo_id)
return TODOS[todo_id]
def delete(self, todo_id):
abort_if_todo_doesnt_exist(todo_id)
del TODOS[todo_id]
return '', 204
def put(self, todo_id):
args = parser.parse_args()
task = {'task': args['task']}
TODOS[todo_id] = task
return task, 201
# TodoList
# shows a list of all todos, and lets you POST to add new tasks
class TodoList(Resource):
def get(self):
return TODOS
def post(self):
args = parser.parse_args()
todo_id = int(max(TODOS.keys()).lstrip('todo')) + 1
todo_id = 'todo%i' % todo_id
TODOS[todo_id] = {'task': args['task']}
return TODOS[todo_id], 201
##
## Actually setup the Api resource routing here
##
api.add_resource(TodoList, '/todos')
api.add_resource(Todo, '/todos/<todo_id>')
if __name__ == '__main__':
app.run()

查询列表结果:

python实现Restful服务  (基于flask)(1)-LMLPHP

查询单任务:

python实现Restful服务  (基于flask)(1)-LMLPHP

python实现Restful服务  (基于flask)(1)-LMLPHP

删除任务:

python实现Restful服务  (基于flask)(1)-LMLPHP

另一个例子:

from flask import Flask
from flask_restful import reqparse, abort, Api, Resource
app = Flask(__name__)
api = Api(app)
TODOS = {
'todo1': {'task': 'build an API'},
'todo2': {'task': '?????'},
'todo3': {'task': 'profit!'},
}
def abort_if_todo_doesnt_exist(todo_id):
if todo_id not in TODOS:
abort(404, message="Todo {} doesn't exist".format(todo_id))
parser = reqparse.RequestParser()
parser.add_argument('task')
# Todo
# shows a single todo item and lets you delete a todo item
class Todo(Resource):
def get(self, todo_id):
abort_if_todo_doesnt_exist(todo_id)
return TODOS[todo_id]
def delete(self, todo_id):
abort_if_todo_doesnt_exist(todo_id)
del TODOS[todo_id]
return '', 204
def put(self, todo_id):
args = parser.parse_args()
task = {'task': args['task']}
TODOS[todo_id] = task
return task, 201
# TodoList
# shows a list of all todos, and lets you POST to add new tasks
class TodoList(Resource):
def get(self):
return TODOS
def post(self):
args = parser.parse_args()
todo_id = int(max(TODOS.keys()).lstrip('todo')) + 1
todo_id = 'todo%i' % todo_id
TODOS[todo_id] = {'task': args['task']}
return TODOS[todo_id], 201
##
## Actually setup the Api resource routing here
##
api.add_resource(TodoList, '/todos')
api.add_resource(Todo, '/todos/<todo_id>')
if __name__ == '__main__':
app.run(debug=True)

通过终端进行如下相应任务:

获取列表:

$ curl http://localhost:5000/todos
{"todo1": {"task": "build an API"}, "todo2": {"task": "?????"}, "todo3": {"task": "profit!"}}

获取单个任务:

$ curl http://localhost:5000/todos/todo3
{"task": "profit!"}

删除一个任务:

curl http://localhost:5000/todos/todo2 -X DELETE -v

增加一个任务:

$ curl http://localhost:5000/todos -d "task=something new" -X POST -v

更新一个任务:

$ curl http://localhost:5000/todos/todo3 -d "task=something different" -X PUT -v
05-26 00:57