Post

如果要以POST发送一个请求，只需要把参数 data 以bytes形式传入。

我们模拟一个微博登录，先读取登录的邮箱和口令，然后按照weibo.cn的登录页的格式以 username=xxx&password=xxx 的编码传入：

from urllib import request, parse



print('Login to weibo.cn…')

email = input('Email: ')

passwd = input('Password: ')

login_data = parse.urlencode([

('username', email),

('password', passwd),

('entry', 'mweibo'),

('client_id', ''),

('savestate', '1'),

('ec', ''),

('pagerefer', 'https://passport.weibo.cn/signin/welcome?entry=mweibo&r=http%3A%2F%2Fm.weibo.cn%2F')

])



req = request.Request('https://passport.weibo.cn/sso/login')

req.add_header('Origin', 'https://passport.weibo.cn')

req.add_header('User-Agent', 'Mozilla/6.0 (iPhone; CPU iPhone OS 8_0 like Mac OS X) AppleWebKit/536.26 (KHTML, like Gecko) Version/8.0 Mobile/10A5376e Safari/8536.25')

req.add_header('Referer', 'https://passport.weibo.cn/signin/login?entry=mweibo&res=wel&wm=3349&r=http%3A%2F%2Fm.weibo.cn%2F')



with request.urlopen(req, data=login_data.encode('utf-8')) as f:

print('Status:', f.status, f.reason)

for k, v in f.getheaders():

print('%s: %s' % (k, v))

print('Data:', f.read().decode('utf-8'))

如果登录成功，我们获得的响应如下：

Status: 200 OK

Server: nginx/1.2.0

…

Set-Cookie: SSOLoginState=1432620126; path=/; domain=weibo.cn

…

Data: {"retcode":20000000,"msg":"","data":{…,"uid":"1658384301"}}

如果登录失败，我们获得的响应如下：

…

Data: {"retcode":50011015,"msg":"\u7528\u6237\u540d\u6216\u5bc6\u7801\u9519\u8bef","data":{"username":"example@python.org","errline":536}}