使用Python的Bottle框架写一个简单的服务接口的示例

时间:2022-04-19 02:23:26

是不是有这么一个场景,对外提供一堆数据或者是要返回给用户一个结果。但是不想把内部的一些数据和逻辑暴露给对方。。。简单点来说,就是想以服务的方式对外提供一个接口。对于这种有很多处理方式,RPC,搭建一个web服务啥的。。。。但是这些毕竟都太重量级了,操作起来很麻烦。我这里给出的一种非常easy的方式来处理。使用bottle解决问题。

需求: 检查一个zookeeper服务中的某些节点是否存在,如果存在返回OK,不存在则给出不存的节点信息。要求返回的信息是和pyunit的结果信息一致。

实现环境:

    1.  python 2.7  以及自带的pyunit
    2.  bottle          作为一个python的简易服务器     

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pip  install    bottle

    3.  kazoo         一个python的zookeeper客户端  

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pip install kazoo

1. 创建一个python的测试类 zk_check.py

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-*- coding: utf-8 -*-                                                                            
                                        
 from kazoo.client import KazooClient                    
 import unittest                              
 class zktest(unittest.TestCase):                      
   def runTest(self):                           
     zknamespace = /app/zktest_performance_1”              
     zkhosts = 127.0.0.1:2181,127.0.0.1:2182,127.0.0.1:2183” 
     ZKTEST_DRIVERS = [“ip1”, “ip2”]     
     ZKTEST_NODES = [“ip3”, “ip4”, “ip5”, “ip6”]
                                        
     driverChildren = []                        
     nodeChildren = []                         
     badDrivers = []                          
     badNodes = []                           
     # checking                             
     zk = KazooClient(hosts=zkhosts, read_only=True)          
     zk.start()                             
     driverFatherPath = zknamespace + /status/drivers”         
     nodeFatherPath = zknamespace + /status/nodes”                                     
                         
     if zk.exists(driverFatherPath):                  
       driverChildren = zk.get_children(driverFatherPath)       
       if len(driverChildren) >                                                
  
         for driver in zktest_DRIVERS:                
           if driver not in driverChildren:            
             badDrivers.append(driver)                                  
                                        
     if zk.exists(nodeFatherPath):                   
       nodeChildren = zk.get_children(nodeFatherPath)         
       if len(nodeChildren) >                                                
  
         for node in zktest_NODES:                  
           if node not in nodeChildren:              
             badNodes.append(node)                                                                       
     zk.stop()
     if (len(badNodes)==0) and (len(badDrivers)==0):          
       self.assertEquals(1,1,”pass”)                 
     else:                               
       if len(badDrivers) > 0:                    
         self.assertEquals(1,2,'len : %d , error : %s' % (len(badDrivers),badDrivers))
       if len(badNodes) > 0:                     
         self.assertEquals(1,2,'len : %d , error : %s' % (len(badNodes),badNodes))                                      
 if __name__ == ‘__main__':                         
   unittest.main()

2. 写一个bottle服务,将结果输出

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import commands                                                                                 
from bottle import route, run, template                   
@route(‘/alisa')                              
 def index():                                
   command = “python /Users/metaboy/script/zk_check.py”        
 
   #output = os.popen(command)                       
   return template(‘<b>{{text}}</b>', text=commands.getoutput(command))                        
                                        
run(host='localhost', port=8888)

3. 后台启动bottle服务,提供外部访问ip

现在可以直接通过  http://localhost:8888/alisa   进行访问。