【Python】http.client库的用法

代码：

# http.client测试,该库较底层，不常用
import http.client

conn=None

try:
    conn=http.client.HTTPSConnection("www.cnblogs.com")
    conn.request("GET","/xiandedanteng/")
    rsp=conn.getresponse()
    print("got response from "+'www.cnblogs.com/xiandedanteng/')

    print('-'*20+'Status&Reason'+'-'*20)
    print("Response.status="+str(rsp.status))
    print("Response.reason="+str(rsp.reason))

    print('-'*20+'Headers'+'-'*20)
    headers=rsp.getheaders()
    for h in headers:
        print(h)

    print('-'*20+'Message'+'-'*20)
    print(rsp.msg)
except Exception as e:
    print(e)
finally:
    if conn:
        conn.close()

输出：

C:\Users\horn1\Desktop\python\12>python httplib.py
got response from www.cnblogs.com/xiandedanteng/
--------------------Status&Reason--------------------
Response.status=200
Response.reason=OK
--------------------Headers--------------------
('Date', 'Tue, 03 Apr 2018 03:27:21 GMT')
('Content-Type', 'text/html; charset=utf-8')
(')
('Connection', 'keep-alive')
('Vary', 'Accept-Encoding')
('Cache-Control', 'private, max-age=10')
('Expires', 'Tue, 03 Apr 2018 03:27:31 GMT')
('Last-Modified', 'Tue, 03 Apr 2018 03:27:21 GMT')
('X-UA-Compatible', 'IE=10')
('X-Frame-Options', 'SAMEORIGIN')
--------------------Message--------------------
Date: Tue, 03 Apr 2018 03:27:21 GMT
Content-Type: text/html; charset=utf-8
Content-Length: 13859
Connection: keep-alive
Vary: Accept-Encoding
Cache-Control: private, max-age=10
Expires: Tue, 03 Apr 2018 03:27:31 GMT
Last-Modified: Tue, 03 Apr 2018 03:27:21 GMT
X-UA-Compatible: IE=10
X-Frame-Options: SAMEORIGIN

2018年4月4日清晨四五点中博客园系统出现502错时，输出是：

C:\Users\horn1\Desktop\python\12>python httplib.py
got response from www.cnblogs.com/xiandedanteng/
--------------------Status&Reason--------------------
Response.status=502
Response.reason=Bad Gateway
--------------------Headers--------------------
('Date', 'Tue, 03 Apr 2018 22:31:44 GMT')
('Content-Type', 'text/html')
(')
('Connection', 'keep-alive')
--------------------Message--------------------
Date: Tue, 03 Apr 2018 22:31:44 GMT
Content-Type: text/html
Content-Length: 246
Connection: keep-alive