python3 http.client/server post传输json问题

from http.server import HTTPServer, BaseHTTPRequestHandler
import json
class Resquest(BaseHTTPRequestHandler):
    def do_POST(self):
        print(self.headers)
        print(self.command)
        req_datas = self.rfile.read(int(self.headers['content-length'])) 
        print("--------------------接受client发送的数据----------------")
        res1 = req_datas.decode('utf-8')
        res = json.loads(res1)
        print(res)
        print("--------------------接受client发送的数据------------------")
        data1 = {'bbb':'222'}
        data = json.dumps(data1)
        self.send_response(200)
        self.send_header('Content-type', 'application/json')
        self.end_headers()
        self.wfile.write(data.encode('utf-8'))
if __name__ == '__main__':
    host = ('localhost', 8888)
    server = HTTPServer(host, Resquest)
    print("Starting server, listen at: %s:%s" % host)
    server.serve_forever()

import http.client, urllib.parse
import json
diag1 = {'aaa':'111'} #要发送的数据 ，因为要转成json格式，所以是字典类型
data = json.dumps(diag1)
headers = {"Content-type": "application/x-www-form-urlencoded", "Accept": "text/plain"}
conn = http.client.HTTPConnection('localhost', 8888)
conn.request('POST', '/ippinte/api/scene/getall', data.encode('utf-8'), headers)#往server端发送数据
response = conn.getresponse()
stc1 = response.read().decode('utf-8')#接受server端返回的数据
stc = json.loads(stc1)
print("-----------------接受server端返回的数据----------------")
print(stc)
print("-----------------接受server端返回的数据----------------")
conn.close()

dict1 = {'aaa':'111'}
jstr = json.dumps(dict1)

jstr1 = jstr.encode('utf-8')

jstr2 = jstr1.decode('utf-8')

jstr3 = json.loads(jstr2)