网络操作操作GET,POST

2019年12月15日

urllib库

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一.urllib.request.urlopen

import urllib.request

with urllib.request.urlopen('http://www.sina.com.cn/') as response:
    data = response.read()
    html = data.decode()
    print(html)

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二.GET

结合 urllib.request.urlopen 一起使用

import urllib.request
import urllib.parse

url = 'http://www.51work6.com/service/mynotes/WebService.php'
email = '414875346@qq.com'
params_dict = {'email': email, 'type': 'JSON', 'action': 'query'}
params_str = urllib.parse.urlencode(params_dict)
print(params_str)

url = url + '?' + params_str  # HTTP参数放到URL之后
print(url)

req = urllib.request.Request(url)
with urllib.request.urlopen(req) as response:
    data = response.read()
    json_data = data.decode()
    print(json_data)

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三.POST data=params_bytes

import urllib.parse
import urllib.request

url = 'http://www.51work6.com/service/mynotes/WebService.php'
# 准备HTTP参数
email = '414875346@qq.com'
params_dict = {'email': email, 'type': 'JSON', 'action': 'query'}
params_str = urllib.parse.urlencode(params_dict)
print(params_str)
params_bytes = params_str.encode()  # 字符串转换为字节序列对象

req = urllib.request.Request(url, data=params_bytes)  # 发送POST请求
with urllib.request.urlopen(req) as response:
    data = response.read()
    json_data = data.decode()
    print(json_data)

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四.Downloader例子

import urllib.request

url = 'https://ss0.bdstatic.com/5aV1bjqh_Q23odCf/static/superman/img/logo/bd_logo1_31bdc765.png'

with urllib.request.urlopen(url) as response:
    data = response.read()
    f_name = 'download.png'
    with open(f_name, 'wb') as f:
        f.write(data)
        print('下载文件成功')

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