Day05,requests和selenium模块

一、requests基于POST请求

#1.requests的GET与POST用法的区别:

'''
    
    GET请求: (HTTP默认的请求方法就是GET)
     * 没有请求体
     * 数据必须在1K之内!
     * GET请求数据会暴露在浏览器的地址栏中

    GET请求常用的操作:
       1. 在浏览器的地址栏中直接给出URL,那么就一定是GET请求
       2. 点击页面上的超链接也一定是GET请求
       3. 提交表单时,表单默认使用GET请求,但可以设置为POST


    POST请求
    (1). 数据不会出现在地址栏中
    (2). 数据的大小没有上限
    (3). 有请求体
    (4). 请求体中如果存在中文,会使用URL编码!

    !!!requests.post()用法与requests.get()完全一致,特殊的是requests.post()有一个data参数,用来存放请求体数据!      
      
'''

#2、发送post请求,模拟浏览器的登录行为

import requests
import re


'''
URL: https://github.com/login
GET
Set-Cookie: _gh_sess=UkJNSE92NXNRMjhOajlvdXhEQ0JNQUFqZFdWNUJGWmZMTXNLNFVqV3RYLzdCdHM1NWR3VnVHV0tTYzlpb0xjRDh6RzgzaDdTb01ZMThKZEtYSW14WktIYnhVTFBXaHN1YW1WVC84YStoMURBa1NFZlJNbXJIb3F2bDZZWDFLYVVtZHB0Y3htYk9USzhBOWdYTXZHTE5FMU9SWkhwdjhSUE8wbHFwUHBZOXdpb3AyaVpVUFpxby8vUHBJY2pzeXR1WWx2UEhJOUZUamY3QUpvZ1lvc2dEVlV0UFRDL2U5c3RPYmF5RHJtN0t4UFFFaW14UGhOQ3dKdWU3NEpHSExZKytWbmoxOXQ4bjZ4NUt2ajJ0N2xRaW44MWlQZ1o2Q0Urbjc1N2FEdUI1MDlscjRLK3dMMTRTMHhXbVlNWUs1eU9lVG92SzNIb1FmdWRtL2hzbGkwQnJ0UjBWYzlNcCszNWdoVmFaUXdZeVNYVXFucWxITlcyM0ZVNGsrd0t0RjlSakFBZGV5SjA0NVNLdVlSZXJuYVFmV0NrM1hGVytFQ2phSXcxdXZDM2J6NTZVSnQ2WkljTnhPNG9NYTlobllhRExScDhlQ04xM1l6Zi9jL0p5UkdHRkc3S2Z3RUxSMUdvcEhCazBXWkYwdkE9LS1VbmpDRUwwZGw0amJVOEgwT2ZQaGlBPT0%3D--4562a6af2d21508e2f522a5983004b4b2bb5983c; path=/; secure; HttpOnly
Cookie: _ga=GA1.2.1697930951.1554622929; _octo=GH1.1.1498701842.1560392375; _device_id=22a0ddb58979d9c97ffafeb3113e2567; user_session=TZzfoXANu224u6MsNzS5Z3GSasDsMIBvZC4cvOknaNRrWRJe; __Host-user_session_same_site=TZzfoXANu224u6MsNzS5Z3GSasDsMIBvZC4cvOknaNRrWRJe; logged_in=no; tz=Asia%2FShanghai; has_recent_activity=1; _gat=1; _gh_sess=U3B3L1FZUzFTY3JCRGZqamZvMGxoakhlYys3U29CK1BVZnlwWDVFRXhHNnZ5ZnRvbWNyNVlzQmdiZXRXVGxlQUZObWlPd2dXODdkTVUydGFaNW5YRm03YlhRVEU2bWFiRWlmeE00K25rd2FzOHlYTUUxQkF2R0JpS3ZpdlhxWE1FdFMrdW4zS2VtWmtrc2xLdmpZVnA3NHZjd3R4d3pxMEM4QWh1Ykk1U2JCYmpvYWZycDJaZHRDdjFDT3JYeHJOMDgrbDl3Q2FOZlZIQUlOUXdSaGJQajVVeHF5VjF0Q21FWkpoTlRSWkR2b2haeUlGNmpkdnZOUUc3dG9ydldTaDhlYllZQWlrZkVnNE0rQ1AxNHBrMVNkbFd0M0NSdjRHYW5PalV0LzJqN0w5OE9ncUVzRThBZzAyUjJXUFVFZ3ZjNEhucGh0dVhlYkFWWks3T2JkOEc4TFdpK1VwbStFOVVrMnQrbGo2S3Q1YmtLcS9ZdSt6Skt1aXkrcldRRTVDZzV5Zkljc1M2dVVBWTRpMjNYbmRBeHdJTW5FLzZFZ2xrd3RNWWJTK1p3NnhCWGlGblBzcENtOFJHcUY5S3hGMmFHK0dTRE5lR1FvNVlLVXBPTEdJcE5BT3BWQWhaSW92aDFwRGdyNnI3cE09LS05L01jajZmUGVEcEl6cjJSYTBpaXVnPT0%3D--ae43dcfa7904aed3f423eb6715b139c831a68a5a
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/75.0.3770.80 Safari/537.36


'''

headers = {
'User-Agent':'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/75.0.3770.80 Safari/537.36'
}

response = requests.get(url='https://github.com/login',headers=headers)

login_cookies = response.cookies.get_dict()
authenticity_token = re.findall('', response.text, re.S)[0]

print(authenticity_token)

headers2 = {
'Referer': 'https://github.com/login',
'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/75.0.3770.80 Safari/537.36',
}

# 拼接请求体信息
form_data = {
"commit": "Sign in",
"utf8": "✓",
"authenticity_token": authenticity_token,
"login": "tankjam",
"password": "kermit46709394",
"webauthn-support": "unsupported",
}

# 往session地址发送post请求
# 携带请求头、请求体、login页的cookies信息
response2 = requests.post(url='https://github.com/session', data=form_data, headers=headers2, cookies=login_cookies)
print(response2.status_code)
# print(response2.text)
with open('github.html', 'w', encoding='utf-8') as f:
f.write(response2.text)

  

二、response请求

import requests

response = requests.get('https://baidu.com')
# response响应
print(response.status_code)  # 获取响应状态码
print(response.url)  # 获取url地址
print(response.encoding)  # 字符编码
response.encoding = 'utf-8'
print(response.text)  # 获取文本
print(response.content)  # 获取二进制流
print(response.headers)  # 获取页面请求头信息
print(response.history)  # 上一次跳转的地址
# 1、返回cookie字典 2、返回cookies对象
print(response.cookies)  # 获取cookies信息,
print(response.cookies.get_dict())  # 获取cookies信息转换成字典
print(response.cookies.items())  # 获取cookies信息转换成字典
print(response.encoding)
print(response.elapsed)  # 访问时间

import requests
# 往音频地址发送get请求
url = 'https://vd3.bdstatic.com/mda-ic4pfhh3ex32svqi/hd/mda-ic4pfhh3ex32svqi.mp4?auth_key=1557973824-0-0-bfb2e69bb5198ff65e18065d91b2b8c8&bcevod_channel=searchbox_feed&pd=wisenatural&abtest=all.mp4'
response = requests.get(url, stream=True)  # stream=True 把content设置为一个迭代器对象
print(response.content)

with open('love_for_GD.mp4', 'wb') as f:
    for content in response.iter_content():
        f.write(content)

  

三、requests高级用法

'''
'''
'''
证书验证(大部分网站都是https)
'''
import requests
# # 如果是ssl请求,首先检查证书是否合法,不合法则报错,程序终端
# response = requests.get('https://www.xiaohuar.com')
# print(response.status_code)

# 改进1:去掉报错,但是会报警告
# import requests
# response = requests.get('https://www.xiaohuar.com', verify=False)
# # 不验证证书,报警告,返回200
# print(response.status_code)

# 改进2:去掉报错,并且去掉警报信息
# import requests
# import urllib3
# urllib3.disable_warnings()  # 关闭警告
# response = requests.get('https://www.xiaohuar.com', verify=False)
# print(response.status_code)

# 改进3:加上证书
# 很多网站都是https,但是不用证书也可以访问,大多数情况都是可以携带也可以不携带证书
# 知乎\百度等都是可带可不带
# 有硬性要求的,则必须带,比如对于定向的用户,拿到证书后才有权限访问某个特定网站
# import requests
# import urllib3
# # urllib3.disable_warnings()  # 关闭警告
# # 伪代码
# response = requests.get(
#     'https://www.xiaohuar.com',
#     # verify=False,
#     # /path/server.crt证书的存放目录, /path/key
#     cert=('/path/server.crt', '/path/key'))
# print(response.status_code)


'''
超时设置
'''

# 超时设置
# 两种超时:float or tuple
# timeout=0.1  # 代表接收数据的超时时间
# # timeout=(0.1,0.2)  # 0.1代表链接超时  0.2代表接收数据的超时时间
#

# import requests
# response = requests.get('https://www.baidu.com',
#                         timeout=0.0001
# print(response.elapsed)
# print(response.status_code)

'''
代理设置:先发送请求给代理,然后由代理帮忙发送(封ip是常见的事情)
'''
# import requests
# proxies={
#     # 带用户名密码的代理,@符号前是用户名与密码
#     'http':'http://tank:123@localhost:9527',
#     # 'http':'http://localhost:9527',
#     # 'https':'https://localhost:9527',
# }
# response=requests.get('https://www.12306.cn',
#                      proxies=proxies)
#
# print(response.status_code)
#
'''
爬取西刺免费代理:
    1.访问西刺免费代理页面
    2.通过re模块解析并提取所有代理
    3.通过ip测试网站对爬取的代理进行测试
    4.若test_ip函数抛出异常代表代理作废,否则代理有效
    5.利用有效的代理进行代理测试


      Cn
      112.85.131.99
      9999
      
        江苏南通
      
      高匿
      HTTPS
      
        
6天 19-05-16 11:20 re: (.*?).*?(.*?) ''' import requests import re import time HEADERS = { 'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.77 Safari/537.36', } def get_index(url): time.sleep(1) response = requests.get(url, headers=HEADERS) return response def parse_index(text): ip_list = re.findall('.*?(.*?).*?(.*?)', text, re.S) for ip_port in ip_list: ip = ':'.join(ip_port) yield ip def test_ip(ip): print('测试ip: %s' % ip) try: proxies = { 'https': ip } # ip测试网站 ip_url = 'https://www.ipip.net/' # 使用有效与无效的代理对ip测试站点进行访问,若返回的结果为200则代表当前测试ip正常 response = requests.get(ip_url, headers=HEADERS, proxies=proxies, timeout=1) if response.status_code == 200: print(f'有用的ip:{ip}') return ip # 若ip代理无效则抛出异常 except Exception as e: print(e) # # 使用代理爬取nba def spider_nba(good_ip): url = 'https://china.nba.com/' proxies = { 'https': good_ip } response = requests.get(url, headers=HEADERS, proxies=proxies) print(response.status_code) print(response.text) if __name__ == '__main__': base_url = 'https://www.xicidaili.com/nn/{}' for line in range(1, 3677): ip_url = base_url.format(line) response = get_index(ip_url) # 解析西刺代理获取每一个ip列表 ip_list = parse_index(response.text) # 循环每一个ip for ip in ip_list: # print(ip) # 对爬取下来的ip进行测试 good_ip = test_ip(ip) if good_ip: # 真是代理,开始测试 spider_nba(good_ip) ''' 认证设置 ''' import requests # 通过访问github的api来测试 # url = 'https://api.github.com/user' # HEADERS = { # 'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.77 Safari/537.36', # } # 测试1,失败返回401 # response = requests.get(url, headers=HEADERS) # print(response.status_code) # 401 # print(response.text) ''' 打印结果: { "message": "Requires authentication", "documentation_url": "https://developer.github.com/v3/users/#get-the-authenticated-user" } ''' # # # 测试2,通过requests.auth内的HTTPBasicAuth进行认证,认证成功返回用户信息 # from requests.auth import HTTPBasicAuth # response = requests.get(url, headers=HEADERS, auth=HTTPBasicAuth('tankjam', 'kermit46709394')) # print(response.text) # # 测试3,通过requests.get请求内的auth参数默认就是HTTPBasicAuth,认证成功返回用户信息 # response = requests.get(url, headers=HEADERS, auth=('tankjam', 'kermit46709394')) # print(response.text) ''' 上传文件 ''' # import requests # 上传文本文件 # files1 = {'file': open('user.txt', 'rb')} # # files参数是POST请求固定参数 # response = requests.post('http://httpbin.org/post', files=files1) # print(response.status_code) # 200 # print(response.text) # 200 # 上传图片文件 # files2 = {'jpg': open('一拳.jpg', 'rb')} # response = requests.post('http://httpbin.org/post', files=files2) # print(response.status_code) # 200 # print(response.text) # 200 # # 上传视频文件 # files3 = {'movie': open('love_for_GD.mp4', 'rb')} # response = requests.post('http://httpbin.org/post', files=files3) # print(response.status_code) # 200 # print(response.text) # 200

  

四、selenium基本使用

''''''
'''
selenium模块讲解
一 什么是selenium?
    最初是一个自动化测试工具。可以使用它帮我们驱动浏览器
    自动去执行某些自定义好的操作。例如在页面中执行JS代码、
    跳过登录验证。可以使用selenium帮我们实现爬虫。
    
二 为什么要使用selenium?
    1、优点:
        使用requests模块登录需要分析大量的复杂通信流程,使用selenium
    可以轻松跳过登录验证。
    
    2、缺点:
        浏览器会加载css、js、图片、视频...数据,爬虫效率相比requests模块要低。
        
三 如何使用selenium?
    下载selenium模块:
        pip3 install -i https://pypi.tuna.tsinghua.edu.cn/simple selenium
    下载浏览器驱动:
        http://npm.taobao.org/mirrors/chromedriver/2.38/
'''

# selenium之第一次
from selenium import webdriver  # 用来驱动浏览器的

# 调用得到一个动作链对象,破解滑动验证码的时候用的,可以拖动图片
from selenium.webdriver import ActionChains

# 按照什么方式查找属性,By.ID,  By.CSS_SELECTOR, By.Class
from selenium.webdriver.common.by import By

from selenium.webdriver.common.keys import Keys  # 键盘按键操作

# 和下面WebDriverWait一起用的,EC是expected_conditions的别名
from selenium.webdriver.support import expected_conditions as EC

# 等待页面加载某些元素
from selenium.webdriver.support.wait import WebDriverWait
import time

# 通过谷歌浏览器驱动打开谷歌浏览器
# webdriver.Chrome(r'chromedriver.exe的绝对路径')
# chrome = webdriver.Chrome(r'D:\BaiduNetdiskDownload\chromedriver_win32\chromedriver.exe')  # 括号内输入chromedriver.exe的绝对路径

# chromedriver.exe存放于python解释器的Scripts文件夹中

# chrome是一个驱动对象
chrome = webdriver.Chrome()

'''
实例1
'''
# 若try出现异常
# try:
#     # 往tank博客主页发送get请求
#     # chrome.get('https://www.cnblogs.com/kermitjam/')
#
#     # 参数1: 驱动对象  参数2: 等待时间
#     wait = WebDriverWait(chrome, 10)
#
#     # 1、访问百度
#     chrome.get('https://www.baidu.com/')
#
#     # 2、查找input输入框
#     input_tag = wait.until(
#         # 调用EC的presence_of_element_located()
#         EC.presence_of_element_located(
#             # 此处可以写一个元组
#             # 参数1: 查找属性的方式
#             # 参数2: 属性的名字
#             (By.ID, "kw")
#         )
#     )
#     input_tag = wait.until(EC.presence_of_element_located((By.ID, "kw")))
#
#     # 3、搜索一拳超人
#     input_tag.send_keys('一拳超人')
#
#     # 4、按键盘回车键
#     input_tag.send_keys(Keys.ENTER)
#
#     time.sleep(3)
#
# # 无论发生什么都会关闭浏览器
# finally:
#     # 关闭浏览器
#     chrome.close()


'''
实例2
'''
try:
    # 往tank博客主页发送get请求
    # chrome.get('https://www.cnblogs.com/kermitjam/')

    # 参数1: 驱动对象  参数2: 等待时间
    wait = WebDriverWait(chrome, 10)

    # 1、访问京东主页
    chrome.get('https://www.jd.com/')

    # 2、查找input输入框
    input_tag = wait.until(EC.presence_of_element_located((By.ID, "key")))

    # 3、搜索唐诗三百首
    input_tag.send_keys('唐诗三百首')

    # 4、根据class属性名称查找标签
    search_button = wait.until(
        EC.presence_of_element_located((By.CLASS_NAME, 'button')))
    # 5、点击搜索按钮
    search_button.click()

    time.sleep(3)

# 无论发生什么都会关闭浏览器
finally:
    # 关闭浏览器
    chrome.close()

  

五、selenium之基本选择器

# from selenium import webdriver  # 用来驱动浏览器的
# import time
#
# '''
# 隐式等待
# '''
# # 获取驱动对象、
# driver = webdriver.Chrome()
#
# try:
#     # 显式等待: 等待某个元素加载
#     # 参数1: 驱动对象  参数2: 等待时间
#     # wait = WebDriverWait(chrome, 10)
#
#     driver.get('https://china.nba.com/')
#
#     # 隐式等待: 等待页面所有元素加载
#     driver.implicitly_wait(10)
#     news_tag = driver.find_element_by_class_name('nav-news')
#     # 获取标签对象
#     print(news_tag)
#     # 获取标签的名字
#     print(news_tag.tag_name)
#
#
#     time.sleep(10)
#
# finally:
#     driver.close()


from selenium import webdriver  # 用来驱动浏览器的
import time

'''
===============所有方法===================
    element是查找一个标签
    elements是查找所有标签

    1、find_element_by_link_text  通过链接文本去找
    2、find_element_by_id 通过id去找
    3、find_element_by_class_name
    4、find_element_by_partial_link_text
    5、find_element_by_name
    6、find_element_by_css_selector
    7、find_element_by_tag_name
'''
# 获取驱动对象、
driver = webdriver.Chrome()

try:

    # 往百度发送请求
    driver.get('https://www.baidu.com/')
    driver.implicitly_wait(10)

    # 1、find_element_by_link_text  通过链接文本去找
    # 根据登录
    # send_tag = driver.find_element_by_link_text('登录')
    # send_tag.click()

    # 2、find_element_by_partial_link_text 通过局部文本查找a标签
    login_button = driver.find_element_by_partial_link_text('登')
    login_button.click()
    time.sleep(1)

    # 3、find_element_by_class_name 根据class属性名查找
    login_tag = driver.find_element_by_class_name('tang-pass-footerBarULogin')
    login_tag.click()
    time.sleep(1)

    # 4、find_element_by_name 根据name属性查找
    username = driver.find_element_by_name('userName')
    username.send_keys('15622792660')
    time.sleep(1)

    # 5、find_element_by_id 通过id属性名查找
    password = driver.find_element_by_id('TANGRAM__PSP_10__password')
    password.send_keys('*******')
    time.sleep(1)

    # 6、find_element_by_css_selector  根据属性选择器查找
    # 根据id查找登录按钮
    login_submit = driver.find_element_by_css_selector('#TANGRAM__PSP_10__submit')
    # driver.find_element_by_css_selector('.pass-button-submit')
    login_submit.click()

    # 7、find_element_by_tag_name  根据标签名称查找标签
    div = driver.find_element_by_tag_name('div')
    print(div.tag_name)

    time.sleep(10)

finally:
    driver.close()

  

 

转载于:https://www.cnblogs.com/renzhenfeng/p/11064623.html

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