Tornado简单Get请求返回JSON字符串（Python）

from tornado import gen from tornado.web import RequestHandler from
tornado.escape import json_decode, json_encode, utf8 import json class
BaseHandler(RequestHandler): """解决JS跨域请求问题""" def set_default_headers(self):
self.set_header('Access-Control-Allow-Origin', '*')
self.set_header('Access-Control-Allow-Methods', 'POST, GET')
self.set_header('Access-Control-Max-Age', 1000)
self.set_header('Access-Control-Allow-Headers', '*')
self.set_header('Content-type', 'application/json') class
IndexHandler(BaseHandler): """首页处理Handler""" def initialize(self, data):
self.data = data print(self.data) @gen.coroutine # 使得方法异步处理 def prepare(self):
'''所有请求的初始化执行''' self.cur = self.application.db.cursor() def get(self, *args,
**kwargs): print(args) sql = """ select id, type_name from tb_types; """
self.cur.execute(sql) res = self.cur.fetchall() result = { 'status': True,
'code': 200, } l = list() for re in res: ids = re[0] d = {'id': ids,
'type_name': re[1]} sql2 = "select id, sectype_name from tb_sectype where
types_id=" + str(ids) + ";" self.cur.execute(sql2) two = list() for t in
self.cur.fetchall(): two.append({'id': t[0], 'sectype_name': t[1]}) d['two'] =
two l.append(d) result['result'] = l self.write(json.dumps(result,
ensure_ascii=False)) def post(self, *args, **kwargs): result = { "result":
'success', 'status': True, 'code': 200 } self.write(json_encode(result))
@gen.coroutine # 使得方法异步处理 def on_finish(self): '''在一个请求结束后被调用'''
self.cur.close()urls = ( url(r'/(\d*)', IndexHandler, dict(data='user123456'),
name='index'), )

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