python请求服务器图片并下载到本地磁盘

>>> import os
>>> os.getcwd()
'C:\\Python33'
>>> os.chdir('E:\\python\\mmy')
>>> os.getcwd()
'E:\\python\\mmy'
>>> import urllib.request
>>> urllib.request.urlopen('http://image.edai.com/avatar/000/88/14/23_avatar_middle.jpg')
<http.client.HTTPResponse object at 0x00000000032E0FD0>
>>> response = urllib.request.urlopen('http://image.edai.com/avatar/000/88/14/23_avatar_middle.jpg')
>>> response.getcode()
200
>>> response.geturl()
'http://image.edai.com/avatar/000/88/14/23_avatar_middle.jpg'
>>> response.info()
<http.client.HTTPMessage object at 0x00000000032ED6A0>
>>> print(response.info())
Expires: Thu, 31 Dec 2037 23:55:55 GMT
Date: Sat, 30 Jan 2016 13:18:38 GMT
Server: nginx/0.8.42
Content-Type: image/jpeg
Content-Length: 8053
Last-Modified: Thu, 08 Jan 2015 06:46:11 GMT
Pragma: public
Accept-Ranges: bytes
Age: 1
X-Via: 1.1 scxx84:1 (Cdn Cache Server V2.0)
Connection: close
Cache-Control: public, must-revalidate, proxy-revalidate


>>> pic = response.read()
>>> with open('liuhui.jpg', 'wb') as f:
    f.write(pic)

8053
>>> 

在本地磁盘已经有了liuhui.jpg了!!!

 

以上代码是在idle下操作的,其实真实的代码只有如下:

import urllib.request

response = urllib.request.urlopen('http://image.edai.com/avatar/000/88/14/23_avatar_middle.jpg')
pic = response.read()

with open('liuhui.jpg', 'wb') as f:
    f.write(pic)

注:

1.urlopen()的参数可以是一个字符串或一个request对象,当为一个字符串时,其实是执行了两个步骤:

(1)req = urllib.request.Request('http://image.edai.com/avatar/000/88/14/23_avatar_middle.jpg');

(2)response = urllib.request.urlopen(req).

2.urllib.request.urlopen()的返回值是一个http.client.HTTPResponse对象,即客户端http响应结果对象。我们知道http协议,对客户端请求是需要响应的,而响应的数据包还包含了http头部信息。因此,urllib.request.urlopen()返回的对象还有以下3个重要的方法:

(1)getcode(): Htpp状态码

(2)geturl():客户端请求的url地址

(3)info():就是http的头部信息(header)

posted @ 2016-01-30 21:35  翌逍  阅读(6616)  评论(0编辑  收藏  举报