python探测web服务质量

本文通过pycurl模块提供的方法探测web服务质量的情况，

pycurl.Curl()类创建一个Curl句柄对象，关于Curl对象的一下方法使用通过一个例子说明：

import os
import sys
import pycurl

# print pycurl.version

URL = "http://www.baidu.com"
c = pycurl.Curl()  # 创建一个curl对象
c.setopt(pycurl.URL, URL)  # 指定连接的URL

# 连接超时时间,5秒
c.setopt(pycurl.CONNECTTIMEOUT, 5)

# 下载超时时间,5秒
c.setopt(pycurl.TIMEOUT, 5)
c.setopt(pycurl.FORBID_REUSE, 1)
c.setopt(pycurl.MAXREDIRS, 1)
c.setopt(pycurl.NOPROGRESS, 1)
c.setopt(pycurl.DNS_CACHE_TIMEOUT, 30)
indexfile = open(os.path.dirname(os.path.realpath(__file__)) + "/content.txt", "wb")
c.setopt(pycurl.WRITEHEADER, indexfile)
c.setopt(pycurl.WRITEDATA, indexfile)
try:
c.perform()
except Exception, e:
print "connecion error:" + str(e)
indexfile.close()
c.close()
sys.exit()

NAMELOOKUP_TIME = c.getinfo(c.NAMELOOKUP_TIME)
CONNECT_TIME = c.getinfo(c.CONNECT_TIME)
PRETRANSFER_TIME = c.getinfo(c.PRETRANSFER_TIME)
STARTTRANSFER_TIME = c.getinfo(c.STARTTRANSFER_TIME)
TOTAL_TIME = c.getinfo(c.TOTAL_TIME)
HTTP_CODE = c.getinfo(c.HTTP_CODE)
SIZE_DOWNLOAD = c.getinfo(c.SIZE_DOWNLOAD)
HEADER_SIZE = c.getinfo(c.HEADER_SIZE)
SPEED_DOWNLOAD = c.getinfo(c.SPEED_DOWNLOAD)

print "HTTP状态码：%s" % (HTTP_CODE)
print "DNS解析时间：%.2f ms" % (NAMELOOKUP_TIME * 1000)
print "建立连接时间：%.2f ms" % (CONNECT_TIME * 1000)
print "准备传输时间：%.2f ms" % (PRETRANSFER_TIME * 1000)
print "传输开始时间：%.2f ms" % (STARTTRANSFER_TIME * 1000)
print "传输结束总时间：%.2f ms" % (TOTAL_TIME * 1000)

print "下载数据包大小：%d bytes/s" % (SIZE_DOWNLOAD)
print "HTTP头部大小：%d byte" % (HEADER_SIZE)
print "平均下载速度：%d bytes/s" % (SPEED_DOWNLOAD)

indexfile.close()
c.close()

执行结果如下：



查看content.txt，内容如下：