使用Python的Bottle框架写一个简单的服务接口的示例

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

pip  install    bottle

3. kazoo 一个python的zookeeper客户端

pip install kazoo

1. 创建一个python的测试类 zk_check.py

 -*- 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

  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(‘{{text}}', 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。