Tornado的同步API寫法舉例實現GET/POST/DELETE請求+Tornado獲取post請求中的json數據（轉載）

下面的實驗主要來自[1][2]，但是對實驗2的代碼進行了修改，修改過程參考了[3]

#---------------------------------------------------實驗1-------------------------------------------------------------------

from tornado.web import Application, RequestHandler
from tornado.ioloop import IOLoop

class HelloHandler(RequestHandler):
  def get(self):
    self.write({'message': 'hello world'})

def make_app():
  urls = [("/", HelloHandler)]
  return Application(urls, debug=True)
  
if __name__ == '__main__':
    app = make_app()
    app.listen(3000)
    IOLoop.instance().start()

python test1.py

**************************************************************

GET請求測試:

瀏覽器打開http://127.0.0.1:3000/

GET請求結果:

#---------------------------------------------------實驗2-----------------獲取post請求中的json數據--------------------------------------------------

from tornado.web import Application, RequestHandler
from tornado.ioloop import IOLoop
import json
items = ['csdn']

class TodoItems(RequestHandler):
  def get(self):
    self.write({'items': items})


class TodoItem(RequestHandler):
  def post(self):
    # items.append(self.request.body)
    print("-----------------進入post----------------")
    print(self.request)
    print("--------------self.write之前------------------")

    jsonbyte = self.request.body
    jsonstr = jsonbyte.decode('utf8')  #解碼，二進制轉爲字符串
    print('Json字符串：', jsonstr)
    jsonobj = json.loads(jsonstr)  #將字符串轉爲json對象
    
    # self.write({'message': self.request.body})
    self.write(jsonobj)

def make_app():
  urls = [
    ("/", TodoItems),
    ("/api/item/", TodoItem)
  ]
  return Application(urls, debug=True)
  
if __name__ == '__main__':
  app = make_app()
  app.listen(3000)
  IOLoop.instance().start()

python test2.py

**************************************************************

GET請求測試:

瀏覽器打開:

http://127.0.0.1:3000/

GET請求結果:

**************************************************************

POST請求測試：

curl -H "Content-Type: application/json" -X POST -d '{"user_id": "123", "coin":100, "success":1, "msg":"OK!" }' "http://127.0.0.1:3000/api/item/"

POST請求結果:

{"user_id": "123", "coin": 100, "success": 1, "msg": "OK!"}

#----------------------------------------實驗3-----------------------------curl發送delete請求---------------------------------------------------------

from tornado.web import Application, RequestHandler
from tornado.ioloop import IOLoop
import json

items = []

class TodoItems(RequestHandler):
  def get(self):
    self.write({'items': items})


class TodoItem(RequestHandler):
  def post(self, _):
    items.append(json.loads(self.request.body))
    self.write({'message': 'new item added'})

  def delete(self, id):
    global items
    new_items = [item for item in items if item['id'] is not int(id)]
    items = new_items
    self.write({'message': 'Item with id %s was deleted' % id})


def make_app():
  urls = [
    ("/", TodoItems),
    (r"/api/item/([^/]+)?", TodoItem)
  ]
  return Application(urls, debug=True)
  
if __name__ == '__main__':
  app = make_app()
  app.listen(3000)
  IOLoop.instance().start()

python test3.py

***********************************************

GET請求測試:

瀏覽器打開http://127.0.0.1:3000/

GET請求測試結果:

***********************************************

POST請求測試:

curl -H "Content-Type: application/json" -X POST -d '{"user_id": "123", "coin":100, "success":1, "msg":"OK!" }' "http://127.0.0.1:3000/api/item/342"

POST請求測試結果:

{"message": "new item added"}

***********************************************

DELETE請求測試:

curl -v -X DELETE 127.0.0.1:3000/api/item/342

DELETE請求測試結果:

{"message": "Item with id 342 was deleted"}

#---------------------------------------------------------結束--------------------------------------------------------------------------

Reference:

[1]How to build a REST API in Python with Tornado (part 1)

[2]How to build a REST API in Python with Tornado (part 2)

[3]tornado獲取客戶端以json字符串提交的數據