python爬虫发送post登录请求的两种方式

python post请求是爬虫中用的比较多的一个场景，如何实现呢？这里会介绍两种实现方式

一、request.post请求

1. 导入import requests包
2. 模拟一个登录请求，自定义data数据字典

 data = {
        'userName': '019630',
        'password': 'b7cb02c884c96820027592ed0b002b06',
        'systemCode': 'SSO',
        't': 0,
        'userAccountType': 'Portal'
    }

3. 请求代码

 response = requests.post(url='http://xxx.uc56.com/omg-sso-main/login.action', data=data)
    return response.text

4. 返回信息

{"errorCode":"B3008","errorMsg":null,"token":"O/wWQuCQCIvNpP5Gw8aAvcDKleef5SGAy1SyHmZNeoT6iv5V5KT6Ag==","userName":"019630","empCode":"019630","systemCasUrlList":[],"updPwdFlag":true,"updPwdIntervalDay":66,"errorCount":null,"checkCode":null,"scanSystemCode":null}

二、requests.request 请求

1. request请求与post类似，我们通过源码分析，post实际也是调用了request示例化请求

 def post(url, data=None, json=None, **kwargs):
    r"""Sends a POST request.

    :param url: URL for the new :class:`Request` object.
    :param data: (optional) Dictionary, list of tuples, bytes, or file-like
        object to send in the body of the :class:`Request`.
    :param json: (optional) json data to send in the body of the :class:`Request`.
    :param \*\*kwargs: Optional arguments that ``request`` takes.
    :return: :class:`Response <Response>` object
    :rtype: requests.Response
    """

    return request('post', url, data=data, json=json, **kwargs)

2. 再分析底层代码我们

with sessions.Session() as session:
    return session.request(method=method, url=url, **kwargs)

3. 改造request请求

response = requests.request(method='POST', url='http://xxx.uc56.com/omg-sso-main/login.action', data=data)
    return response.text

范围结果一致

本文地址：https://blog.csdn.net/jun118166/article/details/107041616