Use the Python Bottle framework to write a simple service interface Example, pythonbottle

Use the Python Bottle framework to write a simple service interface Example, pythonbottle

Is there a scenario where a bunch of data is provided externally or a result is returned to the user. But I don't want to expose some internal data and logic to the other party... To put it simply, we want to provide an external interface as a service. There are many processing methods for this. RPC, what about building a web service .... However, these are all too important and difficult to operate. Here is a very easy way to handle it. Use bottle to solve the problem.

Requirement: Check whether some nodes in a zookeeper service exist. If OK is returned and no node exists, the node information is not saved. The returned information must be consistent with the results of pyunit.

Implementation environment:

1. python 2.7 and its built-in pyunit
2. bottle is a simple python server.

pip  install    bottle

3. kazoo a python zookeeper Client

pip install kazoo

1. Create a python test class 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. Write a bottle service and output the result.

  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. Start the bottle service in the background to provide external access ip addresses

Now you can directly access it through http: // localhost: 8888/alisa.