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.