3.twisted client.getPage的使用

1.client.getPage 返回一个defer。 是异步的。

#coding:utf8
from twisted.internet import  reactor
from twisted.web import client
IP="202.102.224.68"
def print_fun(x):
print x
def run():
    defer=client.getPage("http://freeapi.ipip.net/"+IP)
    defer.addCallback(lambda x:print_fun(x))
    reactor.callLater(2,run)
run()
reactor.run()

python test.py运行即可

为了能够后台运行此程序 ，可以通过如下方式：

#coding:utf8
from twisted.internet import  reactor
from twisted.web import client
from twisted.application.service import  Application
IP="202.102.224.68"
def print_fun(x):
print x
def run():
    defer=client.getPage("http://freeapi.ipip.net/"+IP)
    defer.addCallback(lambda x:print_fun(x))
    reactor.callLater(2,run)
run()
application=Application("test")

twistd -y test.py运行即可。 其会直接后台运行。并在当前目录生成twistd.log twistd.pid文件。 程序的print输出都被写入到了twisd.log中

[root@zkp534 testfiledir]# tail -f  twistd.log

2016-07-07 16:57:33+0800 [-] ["中国","河南","郑州","","联通"]

2016-07-07 16:57:33+0800 [HTTPPageGetter,client] Stopping factory <HTTPClientFactory: http://freeapi.ipip.net/202.102.224.68>

2016-07-07 16:57:33+0800 [-] ["中国","河南","郑州","","联通"]

2016-07-07 16:57:33+0800 [HTTPPageGetter,client] Stopping factory <HTTPClientFactory: http://freeapi.ipip.net/202.102.224.68>

2016-07-07 16:57:33+0800 [-] Starting factory <HTTPClientFactory: http://freeapi.ipip.net/202.102.224.68>

2016-07-07 16:57:35+0800 [-] Starting factory <HTTPClientFactory: http://freeapi.ipip.net/202.102.224.68>

2016-07-07 16:57:36+0800 [-] ["中国","河南","郑州","","联通"]

2016-07-07 16:57:36+0800 [HTTPPageGetter,client] Stopping factory <HTTPClientFactory: http://freeapi.ipip.net/202.102.224.68>

2016-07-07 16:57:37+0800 [-] Starting factory <HTTPClientFactory: http://freeapi.ipip.net/202.102.224.68>

2016-07-07 16:57:39+0800 [-] Starting factory <HTTPClientFactory: http://freeapi.ipip.net/202.102.224.68>

2016-07-07 16:57:41+0800 [-] Starting factory <HTTPClientFactory: http://freeapi.ipip.net/202.102.224.68>

2016-07-07 16:57:42+0800 [-] ["中国","河南","郑州","","联通"]

2016-07-07 16:57:42+0800 [HTTPPageGetter,client] Stopping factory <HTTPClientFactory: http://freeapi.ipip.net/202.102.224.68>

2016-07-07 16:57:43+0800 [-] Starting factory <HTTPClientFactory: http://freeapi.ipip.net/202.102.224.68>