/*前端HTML<script>里：*/
$.post("/js_post/"+ip, data_to_backend, function(data){alert("success "+data)} );

#后端py文件(路由启动前面的html的py文件)里：添加一个路由处理前端post请求
@app.route("/js_post/<ip>", methods=['GET', 'POST'])
def js_post(ip):
   print ip
   return ip +" - ip"

var ip = $(this).parent().prev().prev().prev().prev().text();
data_tmp = {'ip':ip, 'text':"success for ajax"};  // data to send to server.
$.post('/js_call', data_tmp, function(data){alert(data)});

@app.route('/js_call', methods=['GET', 'POST'])
def js_call():  
   print request.values['ip']  
   print request.values['text']  
   # to send the command by ssh : os.system("ssh user@host \' restart(command) \' ")  
   return 'ok!!!!'

$.get('/js_get', {'method':'GET', 'text':"from-html"}, function(data){alert(data)})

@app.route('/js_get', methods=['GET'])
def js_get():
  print "method: "+request.values['method']+" --- text: "+request.values['text']
  return "get success!"