learn_requests

# -*- coding: utf-8 -*-
import requests

response = requests.get('https://api.github.com')
print "状态码，具体解释"
print response.status_code, response.reason
print "头部信息"
print response.headers
print "URL 信息"
print response.url
print "redirect 信息"
print response.history
print "耗费时长"
print response.elapsed
print "request 信息"
print response.request.method

print '----------------------'

print "编码信息"
print response.encoding
print "消息主体内容: byte"
print response.content, type(response.content)
print "消息主体内容: 解析"
print response.text, type(response.text)
print "消息主体内容"
print response.json(), type(response.json())

 

# -*- coding: utf-8 -*-
import requests


def get_key_info(response, *args, **kwargs):
    """回调函数
    """
    print response.headers['Content-Type']


def main():
    """主程序
    """
    requests.get('https://api.github.com', hooks=dict(response=get_key_info))

main()

 

# -*- coding: utf -*-
import requests


def download_image():
    """demo: 下载图片, 文件
    """
    headers = {'User-Agent': 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_10_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/45.0.2454.93 Safari/537.36'}
    url = "http://img3.imgtn.bdimg.com/it/u=2228635891,3833788938&fm=21&gp=0.jpg"
    response = requests.get(url, headers=headers, stream=True)
    with open('demo.jpg', 'wb') as fd:
        for chunk in response.iter_content(128):
            fd.write(chunk)


def download_image_improved():
    """demo: 下载图片
    """
    # 伪造headers信息
    headers = {'User-Agent': 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_10_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/45.0.2454.93 Safari/537.36'}
    # 限定url
    url = "http://img3.imgtn.bdimg.com/it/u=2228635891,3833788938&fm=21&gp=0.jpg"
    response = requests.get(url, headers=headers, stream=True)
    from contextlib import closing
    with closing(requests.get(url, headers=headers, stream=True)) as response:
        # 打开文件
        with open('demo1.jpg', 'wb') as fd:
            # 每128写入一次
            for chunk in response.iter_content(128):
                fd.write(chunk)

download_image_improved()

 

 

session和cookies