• Python—requests模块详解


    Requests模块是第三方模块,需要预先安装,requests模块在python内置模块的基础上进行了高度的封装,从而使得python进行网络请求时,变得更加简洁和人性化。

    1.安装
    非常简单,打开cmd,直接pip安装,或pycharm 中搜索 requests 安装即可.

    pip install requests

    2)发送请求的简洁

      示例代码:获取一个网页(个人github)

    import requests
    
    r = requests.get('https://github.com/Ranxf')       # 最基本的不带参数的get请求
    r1 = requests.get(url='http://dict.baidu.com/s', params={'wd': 'python'})      # 带参数的get请求

    我们就可以使用该方式使用以下各种方法

    1   requests.get(‘https://github.com/timeline.json’)                                # GET请求
    2   requests.post(“http://httpbin.org/post”)                                        # POST请求
    3   requests.put(“http://httpbin.org/put”)                                          # PUT请求
    4   requests.delete(“http://httpbin.org/delete”)                                    # DELETE请求
    5   requests.head(“http://httpbin.org/get”)                                         # HEAD请求
    6   requests.options(“http://httpbin.org/get” )                                     # OPTIONS请求

    3)为url传递参数

    >>> url_params = {'key':'value'}       #    字典传递参数,如果值为None的键不会被添加到url中
    >>> r = requests.get('your url',params = url_params)
    >>> print(r.url)
      your url?key=value

    4)响应的内容

    复制代码
    r.encoding                       #获取当前的编码
    r.encoding = 'utf-8'             #设置编码
    r.text                           #以encoding解析返回内容。字符串方式的响应体,会自动根据响应头部的字符编码进行解码。
    r.content                        #以字节形式(二进制)返回。字节方式的响应体,会自动为你解码 gzip 和 deflate 压缩。
    
    r.headers                        #以字典对象存储服务器响应头,但是这个字典比较特殊,字典键不区分大小写,若键不存在则返回None
    
    r.status_code                     #响应状态码
    r.raw                             #返回原始响应体,也就是 urllib 的 response 对象,使用 r.raw.read()   
    r.ok                              # 查看r.ok的布尔值便可以知道是否登陆成功
     #*特殊方法*#
    r.json()                         #Requests中内置的JSON解码器,以json形式返回,前提返回的内容确保是json格式的,不然解析出错会抛异常
    r.raise_for_status()             #失败请求(非200响应)抛出异常
    复制代码

    post发送json请求:

    1 import requests
    2 import json
    3  
    4 r = requests.post('https://api.github.com/some/endpoint', data=json.dumps({'some': 'data'}))
    5 print(r.json())

    5)定制头和cookie信息

    header = {'user-agent': 'my-app/0.0.1''}
    cookie = {'key':'value'}
     r = requests.get/post('your url',headers=header,cookies=cookie) 
    data = {'some': 'data'}
    headers = {'content-type': 'application/json',
               'User-Agent': 'Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:22.0) Gecko/20100101 Firefox/22.0'}
     
    r = requests.post('https://api.github.com/some/endpoint', data=data, headers=headers)
    print(r.text)

    6)响应状态码

    使用requests方法后,会返回一个response对象,其存储了服务器响应的内容,如上实例中已经提到的 r.text、r.status_code……
    获取文本方式的响应体实例:当你访问 r.text 之时,会使用其响应的文本编码进行解码,并且你可以修改其编码让 r.text 使用自定义的编码进行解码。

    1 r = requests.get('http://www.itwhy.org')
    2 print(r.text, '
    {}
    '.format('*'*79), r.encoding)
    3 r.encoding = 'GBK'
    4 print(r.text, '
    {}
    '.format('*'*79), r.encoding)

    示例代码:

    复制代码
    1 import requests
    2 
    3 r = requests.get('https://github.com/Ranxf')       # 最基本的不带参数的get请求
    4 print(r.status_code)                               # 获取返回状态
    5 r1 = requests.get(url='http://dict.baidu.com/s', params={'wd': 'python'})      # 带参数的get请求
    6 print(r1.url)
    7 print(r1.text)        # 打印解码后的返回数据
    复制代码

    运行结果:

    /usr/bin/python3.5 /home/rxf/python3_1000/1000/python3_server/python3_requests/demo1.py
    200
    http://dict.baidu.com/s?wd=python
    …………
    
    Process finished with exit code 0
     r.status_code                      #如果不是200,可以使用 r.raise_for_status() 抛出异常

    7)响应

    r.headers                                  #返回字典类型,头信息
    r.requests.headers                         #返回发送到服务器的头信息
    r.cookies                                  #返回cookie
    r.history                                  #返回重定向信息,当然可以在请求是加上allow_redirects = false 阻止重定向

    8)超时

    r = requests.get('url',timeout=1)           #设置秒数超时,仅对于连接有效

    9)会话对象,能够跨请求保持某些参数

    s = requests.Session()
    s.auth = ('auth','passwd')
    s.headers = {'key':'value'}
    r = s.get('url')
    r1 = s.get('url1') 

    10)代理

    proxies = {'http':'ip1','https':'ip2' }
    requests.get('url',proxies=proxies)

    11

    # HTTP请求类型
    # get类型
    r = requests.get('https://github.com/timeline.json')
    # post类型
    r = requests.post("http://m.ctrip.com/post")
    # put类型
    r = requests.put("http://m.ctrip.com/put")
    # delete类型
    r = requests.delete("http://m.ctrip.com/delete")
    # head类型
    r = requests.head("http://m.ctrip.com/head")
    # options类型
    r = requests.options("http://m.ctrip.com/get")
    
    # 获取响应内容
    print(r.content) #以字节的方式去显示,中文显示为字符
    print(r.text) #以文本的方式去显示
    
    #URL传递参数
    payload = {'keyword': '香港', 'salecityid': '2'}
    r = requests.get("http://m.ctrip.com/webapp/tourvisa/visa_list", params=payload) 
    print(r.url) #示例为http://m.ctrip.com/webapp/tourvisa/visa_list?salecityid=2&keyword=香港
    
    #获取/修改网页编码
    r = requests.get('https://github.com/timeline.json')
    print (r.encoding)
    
    
    #json处理
    r = requests.get('https://github.com/timeline.json')
    print(r.json()) # 需要先import json    
    
    # 定制请求头
    url = 'http://m.ctrip.com'
    headers = {'User-Agent' : 'Mozilla/5.0 (Linux; Android 4.2.1; en-us; Nexus 4 Build/JOP40D) AppleWebKit/535.19 (KHTML, like Gecko) Chrome/18.0.1025.166 Mobile Safari/535.19'}
    r = requests.post(url, headers=headers)
    print (r.request.headers)
    
    #复杂post请求
    url = 'http://m.ctrip.com'
    payload = {'some': 'data'}
    r = requests.post(url, data=json.dumps(payload)) #如果传递的payload是string而不是dict,需要先调用dumps方法格式化一下
    
    # post多部分编码文件
    url = 'http://m.ctrip.com'
    files = {'file': open('report.xls', 'rb')}
    r = requests.post(url, files=files)
    
    # 响应状态码
    r = requests.get('http://m.ctrip.com')
    print(r.status_code)
        
    # 响应头
    r = requests.get('http://m.ctrip.com')
    print (r.headers)
    print (r.headers['Content-Type'])
    print (r.headers.get('content-type')) #访问响应头部分内容的两种方式
        
    # Cookies
    url = 'http://example.com/some/cookie/setting/url'
    r = requests.get(url)
    r.cookies['example_cookie_name']    #读取cookies
        
    url = 'http://m.ctrip.com/cookies'
    cookies = dict(cookies_are='working')
    r = requests.get(url, cookies=cookies) #发送cookies
    
    #设置超时时间
    r = requests.get('http://m.ctrip.com', timeout=0.001)
    
    #设置访问代理
    proxies = {
               "http": "http://10.10.1.10:3128",
               "https": "http://10.10.1.100:4444",
              }
    r = requests.get('http://m.ctrip.com', proxies=proxies)
    
    
    #如果代理需要用户名和密码,则需要这样:
    proxies = {
        "http": "http://user:pass@10.10.1.10:3128/",
    }
    

      

    3、示例代码

    GET请求

    复制代码
    1 # 1、无参数实例
     2   
     3 import requests
     4   
     5 ret = requests.get('https://github.com/timeline.json')
     6   
     7 print(ret.url)
     8 print(ret.text)
     9   
    10   
    11   
    12 # 2、有参数实例
    13   
    14 import requests
    15   
    16 payload = {'key1': 'value1', 'key2': 'value2'}
    17 ret = requests.get("http://httpbin.org/get", params=payload)
    18   
    19 print(ret.url)
    20 print(ret.text)
    复制代码

    POST请求

    复制代码
    # 1、基本POST实例
      
    import requests
      
    payload = {'key1': 'value1', 'key2': 'value2'}
    ret = requests.post("http://httpbin.org/post", data=payload)
      
    print(ret.text)
      
      
    # 2、发送请求头和数据实例
      
    import requests
    import json
      
    url = 'https://api.github.com/some/endpoint'
    payload = {'some': 'data'}
    headers = {'content-type': 'application/json'}
      
    ret = requests.post(url, data=json.dumps(payload), headers=headers)
      
    print(ret.text)
    print(ret.cookies)
    复制代码

    请求参数

    复制代码
    def request(method, url, **kwargs):
        """Constructs and sends a :class:`Request <Request>`.
    
        :param method: method for the new :class:`Request` object.
        :param url: URL for the new :class:`Request` object.
        :param params: (optional) Dictionary or bytes to be sent in the query string for the :class:`Request`.
        :param data: (optional) Dictionary, 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 headers: (optional) Dictionary of HTTP Headers to send with the :class:`Request`.
        :param cookies: (optional) Dict or CookieJar object to send with the :class:`Request`.
        :param files: (optional) Dictionary of ``'name': file-like-objects`` (or ``{'name': file-tuple}``) for multipart encoding upload.
            ``file-tuple`` can be a 2-tuple ``('filename', fileobj)``, 3-tuple ``('filename', fileobj, 'content_type')``
            or a 4-tuple ``('filename', fileobj, 'content_type', custom_headers)``, where ``'content-type'`` is a string
            defining the content type of the given file and ``custom_headers`` a dict-like object containing additional headers
            to add for the file.
        :param auth: (optional) Auth tuple to enable Basic/Digest/Custom HTTP Auth.
        :param timeout: (optional) How long to wait for the server to send data
            before giving up, as a float, or a :ref:`(connect timeout, read
            timeout) <timeouts>` tuple.
        :type timeout: float or tuple
        :param allow_redirects: (optional) Boolean. Set to True if POST/PUT/DELETE redirect following is allowed.
        :type allow_redirects: bool
        :param proxies: (optional) Dictionary mapping protocol to the URL of the proxy.
        :param verify: (optional) whether the SSL cert will be verified. A CA_BUNDLE path can also be provided. Defaults to ``True``.
        :param stream: (optional) if ``False``, the response content will be immediately downloaded.
        :param cert: (optional) if String, path to ssl client cert file (.pem). If Tuple, ('cert', 'key') pair.
        :return: :class:`Response <Response>` object
        :rtype: requests.Response
    
        Usage::
    
          >>> import requests
          >>> req = requests.request('GET', 'http://httpbin.org/get')
          <Response [200]>
        """
    
    参数列表
    
    请求参数
    复制代码
    复制代码
    def param_method_url():
        # requests.request(method='get', url='http://127.0.0.1:8000/test/')
        # requests.request(method='post', url='http://127.0.0.1:8000/test/')
        pass
    
    
    def param_param():
        # - 可以是字典
        # - 可以是字符串
        # - 可以是字节(ascii编码以内)
    
        # requests.request(method='get',
        # url='http://127.0.0.1:8000/test/',
        # params={'k1': 'v1', 'k2': '水电费'})
    
        # requests.request(method='get',
        # url='http://127.0.0.1:8000/test/',
        # params="k1=v1&k2=水电费&k3=v3&k3=vv3")
    
        # requests.request(method='get',
        # url='http://127.0.0.1:8000/test/',
        # params=bytes("k1=v1&k2=k2&k3=v3&k3=vv3", encoding='utf8'))
    
        # 错误
        # requests.request(method='get',
        # url='http://127.0.0.1:8000/test/',
        # params=bytes("k1=v1&k2=水电费&k3=v3&k3=vv3", encoding='utf8'))
        pass
    
    
    def param_data():
        # 可以是字典
        # 可以是字符串
        # 可以是字节
        # 可以是文件对象
    
        # requests.request(method='POST',
        # url='http://127.0.0.1:8000/test/',
        # data={'k1': 'v1', 'k2': '水电费'})
    
        # requests.request(method='POST',
        # url='http://127.0.0.1:8000/test/',
        # data="k1=v1; k2=v2; k3=v3; k3=v4"
        # )
    
        # requests.request(method='POST',
        # url='http://127.0.0.1:8000/test/',
        # data="k1=v1;k2=v2;k3=v3;k3=v4",
        # headers={'Content-Type': 'application/x-www-form-urlencoded'}
        # )
    
        # requests.request(method='POST',
        # url='http://127.0.0.1:8000/test/',
        # data=open('data_file.py', mode='r', encoding='utf-8'), # 文件内容是:k1=v1;k2=v2;k3=v3;k3=v4
        # headers={'Content-Type': 'application/x-www-form-urlencoded'}
        # )
        pass
    
    
    def param_json():
        # 将json中对应的数据进行序列化成一个字符串,json.dumps(...)
        # 然后发送到服务器端的body中,并且Content-Type是 {'Content-Type': 'application/json'}
        requests.request(method='POST',
                         url='http://127.0.0.1:8000/test/',
                         json={'k1': 'v1', 'k2': '水电费'})
    
    
    def param_headers():
        # 发送请求头到服务器端
        requests.request(method='POST',
                         url='http://127.0.0.1:8000/test/',
                         json={'k1': 'v1', 'k2': '水电费'},
                         headers={'Content-Type': 'application/x-www-form-urlencoded'}
                         )
    
    
    def param_cookies():
        # 发送Cookie到服务器端
        requests.request(method='POST',
                         url='http://127.0.0.1:8000/test/',
                         data={'k1': 'v1', 'k2': 'v2'},
                         cookies={'cook1': 'value1'},
                         )
        # 也可以使用CookieJar(字典形式就是在此基础上封装)
        from http.cookiejar import CookieJar
        from http.cookiejar import Cookie
    
        obj = CookieJar()
        obj.set_cookie(Cookie(version=0, name='c1', value='v1', port=None, domain='', path='/', secure=False, expires=None,
                              discard=True, comment=None, comment_url=None, rest={'HttpOnly': None}, rfc2109=False,
                              port_specified=False, domain_specified=False, domain_initial_dot=False, path_specified=False)
                       )
        requests.request(method='POST',
                         url='http://127.0.0.1:8000/test/',
                         data={'k1': 'v1', 'k2': 'v2'},
                         cookies=obj)
    
    
    def param_files():
        # 发送文件
        # file_dict = {
        # 'f1': open('readme', 'rb')
        # }
        # requests.request(method='POST',
        # url='http://127.0.0.1:8000/test/',
        # files=file_dict)
    
        # 发送文件,定制文件名
        # file_dict = {
        # 'f1': ('test.txt', open('readme', 'rb'))
        # }
        # requests.request(method='POST',
        # url='http://127.0.0.1:8000/test/',
        # files=file_dict)
    
        # 发送文件,定制文件名
        # file_dict = {
        # 'f1': ('test.txt', "hahsfaksfa9kasdjflaksdjf")
        # }
        # requests.request(method='POST',
        # url='http://127.0.0.1:8000/test/',
        # files=file_dict)
    
        # 发送文件,定制文件名
        # file_dict = {
        #     'f1': ('test.txt', "hahsfaksfa9kasdjflaksdjf", 'application/text', {'k1': '0'})
        # }
        # requests.request(method='POST',
        #                  url='http://127.0.0.1:8000/test/',
        #                  files=file_dict)
    
        pass
    
    
    def param_auth():
        from requests.auth import HTTPBasicAuth, HTTPDigestAuth
    
        ret = requests.get('https://api.github.com/user', auth=HTTPBasicAuth('wupeiqi', 'sdfasdfasdf'))
        print(ret.text)
    
        # ret = requests.get('http://192.168.1.1',
        # auth=HTTPBasicAuth('admin', 'admin'))
        # ret.encoding = 'gbk'
        # print(ret.text)
    
        # ret = requests.get('http://httpbin.org/digest-auth/auth/user/pass', auth=HTTPDigestAuth('user', 'pass'))
        # print(ret)
        #
    
    
    def param_timeout():
        # ret = requests.get('http://google.com/', timeout=1)
        # print(ret)
    
        # ret = requests.get('http://google.com/', timeout=(5, 1))
        # print(ret)
        pass
    
    
    def param_allow_redirects():
        ret = requests.get('http://127.0.0.1:8000/test/', allow_redirects=False)
        print(ret.text)
    
    
    def param_proxies():
        # proxies = {
        # "http": "61.172.249.96:80",
        # "https": "http://61.185.219.126:3128",
        # }
    
        # proxies = {'http://10.20.1.128': 'http://10.10.1.10:5323'}
    
        # ret = requests.get("http://www.proxy360.cn/Proxy", proxies=proxies)
        # print(ret.headers)
    
    
        # from requests.auth import HTTPProxyAuth
        #
        # proxyDict = {
        # 'http': '77.75.105.165',
        # 'https': '77.75.105.165'
        # }
        # auth = HTTPProxyAuth('username', 'mypassword')
        #
        # r = requests.get("http://www.google.com", proxies=proxyDict, auth=auth)
        # print(r.text)
    
        pass
    
    
    def param_stream():
        ret = requests.get('http://127.0.0.1:8000/test/', stream=True)
        print(ret.content)
        ret.close()
    
        # from contextlib import closing
        # with closing(requests.get('http://httpbin.org/get', stream=True)) as r:
        # # 在此处理响应。
        # for i in r.iter_content():
        # print(i)
    
    
    def requests_session():
        import requests
    
        session = requests.Session()
    
        ### 1、首先登陆任何页面,获取cookie
    
        i1 = session.get(url="http://dig.chouti.com/help/service")
    
        ### 2、用户登陆,携带上一次的cookie,后台对cookie中的 gpsd 进行授权
        i2 = session.post(
            url="http://dig.chouti.com/login",
            data={
                'phone': "8615131255089",
                'password': "xxxxxx",
                'oneMonth': ""
            }
        )
    
        i3 = session.post(
            url="http://dig.chouti.com/link/vote?linksId=8589623",
        )
        print(i3.text)
    复制代码

    json请求:

    复制代码
    #! /usr/bin/python3
    import requests
    import json
    
    
    class url_request():
        def __init__(self):
            ''' init '''
    
    if __name__ == '__main__':
        heard = {'Content-Type': 'application/json'}
        payload = {'CountryName': '中国',
                   'ProvinceName': '四川省',
                   'L1CityName': 'chengdu',
                   'L2CityName': 'yibing',
                   'TownName': '',
                   'Longitude': '107.33393',
                   'Latitude': '33.157131',
                   'Language': 'CN'}
        r = requests.post("http://www.xxxxxx.com/CityLocation/json/LBSLocateCity", heards=heard, data=payload)
        data = r.json()
        if r.status_code!=200:
            print('LBSLocateCity API Error' + str(r.status_code))
        print(data['CityEntities'][0]['CityID'])  # 打印返回json中的某个key的value
        print(data['ResponseStatus']['Ack'])
        print(json.dump(data, indent=4, sort_keys=True, ensure_ascii=False))  # 树形打印json,ensure_ascii必须设为False否则中文会显示为unicode
    复制代码

    Xml请求:

    复制代码
    #! /usr/bin/python3
    import requests
    
    class url_request():
        def __init__(self):
            """init"""
    
    if __name__ == '__main__':
        heards = {'Content-type': 'text/xml'}
        XML = '<?xml version="1.0" encoding="utf-8"?><soap:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/"><soap:Body><Request xmlns="http://tempuri.org/"><jme><JobClassFullName>WeChatJSTicket.JobWS.Job.JobRefreshTicket,WeChatJSTicket.JobWS</JobClassFullName><Action>RUN</Action><Param>1</Param><HostIP>127.0.0.1</HostIP><JobInfo>1</JobInfo><NeedParallel>false</NeedParallel></jme></Request></soap:Body></soap:Envelope>'
        url = 'http://jobws.push.mobile.xxxxxxxx.com/RefreshWeiXInTokenJob/RefreshService.asmx'
        r = requests.post(url=url, heards=heards, data=XML)
        data = r.text
        print(data)
    复制代码

    状态异常处理

    复制代码
    import requests
    
    URL = 'http://ip.taobao.com/service/getIpInfo.php'  # 淘宝IP地址库API
    try:
        r = requests.get(URL, params={'ip': '8.8.8.8'}, timeout=1)
        r.raise_for_status()  # 如果响应状态码不是 200,就主动抛出异常
    except requests.RequestException as e:
        print(e)
    else:
        result = r.json()
        print(type(result), result, sep='
    ')
    复制代码

    上传文件

    使用request模块,也可以上传文件,文件的类型会自动进行处理:

    复制代码
    import requests
     
    url = 'http://127.0.0.1:8080/upload'
    files = {'file': open('/home/rxf/test.jpg', 'rb')}
    #files = {'file': ('report.jpg', open('/home/lyb/sjzl.mpg', 'rb'))}     #显式的设置文件名
     
    r = requests.post(url, files=files)
    print(r.text)
    复制代码

    request更加方便的是,可以把字符串当作文件进行上传:

    复制代码
    import requests
     
    url = 'http://127.0.0.1:8080/upload'
    files = {'file': ('test.txt', b'Hello Requests.')}     #必需显式的设置文件名
     
    r = requests.post(url, files=files)
    print(r.text)
    复制代码

    6) 身份验证

    基本身份认证(HTTP Basic Auth)

    import requests
    from requests.auth import HTTPBasicAuth
     
    r = requests.get('https://httpbin.org/hidden-basic-auth/user/passwd', auth=HTTPBasicAuth('user', 'passwd'))
    # r = requests.get('https://httpbin.org/hidden-basic-auth/user/passwd', auth=('user', 'passwd'))    # 简写
    print(r.json())

    另一种非常流行的HTTP身份认证形式是摘要式身份认证,Requests对它的支持也是开箱即可用的:

    requests.get(URL, auth=HTTPDigestAuth('user', 'pass')

    Cookies与会话对象

    如果某个响应中包含一些Cookie,你可以快速访问它们:

    import requests
     
    r = requests.get('http://www.google.com.hk/')
    print(r.cookies['NID'])
    print(tuple(r.cookies))

    要想发送你的cookies到服务器,可以使用 cookies 参数:

    复制代码
    import requests
     
    url = 'http://httpbin.org/cookies'
    cookies = {'testCookies_1': 'Hello_Python3', 'testCookies_2': 'Hello_Requests'}
    # 在Cookie Version 0中规定空格、方括号、圆括号、等于号、逗号、双引号、斜杠、问号、@,冒号,分号等特殊符号都不能作为Cookie的内容。
    r = requests.get(url, cookies=cookies)
    print(r.json())
    复制代码

    会话对象让你能够跨请求保持某些参数,最方便的是在同一个Session实例发出的所有请求之间保持cookies,且这些都是自动处理的,甚是方便。
    下面就来一个真正的实例,如下是快盘签到脚本:

    复制代码
    import requests
     
    headers = {'Accept': 'text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8',
               'Accept-Encoding': 'gzip, deflate, compress',
               'Accept-Language': 'en-us;q=0.5,en;q=0.3',
               'Cache-Control': 'max-age=0',
               'Connection': 'keep-alive',
               'User-Agent': 'Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:22.0) Gecko/20100101 Firefox/22.0'}
     
    s = requests.Session()
    s.headers.update(headers)
    # s.auth = ('superuser', '123')
    s.get('https://www.kuaipan.cn/account_login.htm')
     
    _URL = 'http://www.kuaipan.cn/index.php'
    s.post(_URL, params={'ac':'account', 'op':'login'},
           data={'username':'****@foxmail.com', 'userpwd':'********', 'isajax':'yes'})
    r = s.get(_URL, params={'ac':'zone', 'op':'taskdetail'})
    print(r.json())
    s.get(_URL, params={'ac':'common', 'op':'usersign'})
    复制代码

    requests模块抓取网页源码并保存到文件示例

    这是一个基本的文件保存操作,但这里有几个值得注意的问题:

    1.安装requests包,命令行输入pip install requests即可自动安装。很多人推荐使用requests,自带的urllib.request也可以抓取网页源码

    2.open方法encoding参数设为utf-8,否则保存的文件会出现乱码。

    3.如果直接在cmd中输出抓取的内容,会提示各种编码错误,所以保存到文件查看。

    4.with open方法是更好的写法,可以自动操作完毕后释放资源

    复制代码
    #! /urs/bin/python3
    import requests
    
    '''requests模块抓取网页源码并保存到文件示例'''
    html = requests.get("http://www.baidu.com")
    with open('test.txt', 'w', encoding='utf-8') as f:
        f.write(html.text)
        
    '''读取一个txt文件,每次读取一行,并保存到另一个txt文件中的示例'''
    ff = open('testt.txt', 'w', encoding='utf-8')
    with open('test.txt', encoding="utf-8") as f:
        for line in f:
            ff.write(line)
            ff.close()
    复制代码

    因为在命令行中打印每次读取一行的数据,中文会出现编码错误,所以每次读取一行并保存到另一个文件,这样来测试读取是否正常。(注意open的时候制定encoding编码方式)

     

    #!/usr/bin/env python
    # -*- coding:utf-8 -*-
    import requests
    
    
    # ############## 方式一 ##############
    """
    # ## 1、首先登陆任何页面,获取cookie
    i1 = requests.get(url="http://dig.chouti.com/help/service")
    i1_cookies = i1.cookies.get_dict()
    
    # ## 2、用户登陆,携带上一次的cookie,后台对cookie中的 gpsd 进行授权
    i2 = requests.post(
        url="http://dig.chouti.com/login",
        data={
            'phone': "8615131255089",
            'password': "xxooxxoo",
            'oneMonth': ""
        },
        cookies=i1_cookies
    )
    
    # ## 3、点赞(只需要携带已经被授权的gpsd即可)
    gpsd = i1_cookies['gpsd']
    i3 = requests.post(
        url="http://dig.chouti.com/link/vote?linksId=8589523",
        cookies={'gpsd': gpsd}
    )
    
    print(i3.text)
    """
    
    
    # ############## 方式二 ##############
    """
    import requests
    
    session = requests.Session()
    i1 = session.get(url="http://dig.chouti.com/help/service")
    i2 = session.post(
        url="http://dig.chouti.com/login",
        data={
            'phone': "8615131255089",
            'password': "xxooxxoo",
            'oneMonth': ""
        }
    )
    i3 = session.post(
        url="http://dig.chouti.com/link/vote?linksId=8589523"
    )
    print(i3.text)
    
    """
    
    抽屉新热榜
    

      

    #!/usr/bin/env python
    # -*- coding:utf-8 -*-
    
    import requests
    from bs4 import BeautifulSoup
    
    # ############## 方式一 ##############
    #
    # # 1. 访问登陆页面,获取 authenticity_token
    # i1 = requests.get('https://github.com/login')
    # soup1 = BeautifulSoup(i1.text, features='lxml')
    # tag = soup1.find(name='input', attrs={'name': 'authenticity_token'})
    # authenticity_token = tag.get('value')
    # c1 = i1.cookies.get_dict()
    # i1.close()
    #
    # # 1. 携带authenticity_token和用户名密码等信息,发送用户验证
    # form_data = {
    # "authenticity_token": authenticity_token,
    #     "utf8": "",
    #     "commit": "Sign in",
    #     "login": "wupeiqi@live.com",
    #     'password': 'xxoo'
    # }
    #
    # i2 = requests.post('https://github.com/session', data=form_data, cookies=c1)
    # c2 = i2.cookies.get_dict()
    # c1.update(c2)
    # i3 = requests.get('https://github.com/settings/repositories', cookies=c1)
    #
    # soup3 = BeautifulSoup(i3.text, features='lxml')
    # list_group = soup3.find(name='div', class_='listgroup')
    #
    # from bs4.element import Tag
    #
    # for child in list_group.children:
    #     if isinstance(child, Tag):
    #         project_tag = child.find(name='a', class_='mr-1')
    #         size_tag = child.find(name='small')
    #         temp = "项目:%s(%s); 项目路径:%s" % (project_tag.get('href'), size_tag.string, project_tag.string, )
    #         print(temp)
    
    
    
    # ############## 方式二 ##############
    # session = requests.Session()
    # # 1. 访问登陆页面,获取 authenticity_token
    # i1 = session.get('https://github.com/login')
    # soup1 = BeautifulSoup(i1.text, features='lxml')
    # tag = soup1.find(name='input', attrs={'name': 'authenticity_token'})
    # authenticity_token = tag.get('value')
    # c1 = i1.cookies.get_dict()
    # i1.close()
    #
    # # 1. 携带authenticity_token和用户名密码等信息,发送用户验证
    # form_data = {
    #     "authenticity_token": authenticity_token,
    #     "utf8": "",
    #     "commit": "Sign in",
    #     "login": "wupeiqi@live.com",
    #     'password': 'xxoo'
    # }
    #
    # i2 = session.post('https://github.com/session', data=form_data)
    # c2 = i2.cookies.get_dict()
    # c1.update(c2)
    # i3 = session.get('https://github.com/settings/repositories')
    #
    # soup3 = BeautifulSoup(i3.text, features='lxml')
    # list_group = soup3.find(name='div', class_='listgroup')
    #
    # from bs4.element import Tag
    #
    # for child in list_group.children:
    #     if isinstance(child, Tag):
    #         project_tag = child.find(name='a', class_='mr-1')
    #         size_tag = child.find(name='small')
    #         temp = "项目:%s(%s); 项目路径:%s" % (project_tag.get('href'), size_tag.string, project_tag.string, )
    #         print(temp)
    
    github
    

      

    #!/usr/bin/env python
    # -*- coding:utf-8 -*-
    import time
    
    import requests
    from bs4 import BeautifulSoup
    
    session = requests.Session()
    
    i1 = session.get(
        url='https://www.zhihu.com/#signin',
        headers={
            'User-Agent': 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_10_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/54.0.2840.98 Safari/537.36',
        }
    )
    
    soup1 = BeautifulSoup(i1.text, 'lxml')
    xsrf_tag = soup1.find(name='input', attrs={'name': '_xsrf'})
    xsrf = xsrf_tag.get('value')
    
    current_time = time.time()
    i2 = session.get(
        url='https://www.zhihu.com/captcha.gif',
        params={'r': current_time, 'type': 'login'},
        headers={
            'User-Agent': 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_10_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/54.0.2840.98 Safari/537.36',
        })
    
    with open('zhihu.gif', 'wb') as f:
        f.write(i2.content)
    
    captcha = input('请打开zhihu.gif文件,查看并输入验证码:')
    form_data = {
        "_xsrf": xsrf,
        'password': 'xxooxxoo',
        "captcha": 'captcha',
        'email': '424662508@qq.com'
    }
    i3 = session.post(
        url='https://www.zhihu.com/login/email',
        data=form_data,
        headers={
            'User-Agent': 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_10_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/54.0.2840.98 Safari/537.36',
        }
    )
    
    i4 = session.get(
        url='https://www.zhihu.com/settings/profile',
        headers={
            'User-Agent': 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_10_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/54.0.2840.98 Safari/537.36',
        }
    )
    
    soup4 = BeautifulSoup(i4.text, 'lxml')
    tag = soup4.find(id='rename-section')
    nick_name = tag.find('span',class_='name').string
    print(nick_name)
    
    知乎
    

      

    #!/usr/bin/env python
    # -*- coding:utf-8 -*-
    import re
    import json
    import base64
    
    import rsa
    import requests
    
    
    def js_encrypt(text):
        b64der = 'MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCp0wHYbg/NOPO3nzMD3dndwS0MccuMeXCHgVlGOoYyFwLdS24Im2e7YyhB0wrUsyYf0/nhzCzBK8ZC9eCWqd0aHbdgOQT6CuFQBMjbyGYvlVYU2ZP7kG9Ft6YV6oc9ambuO7nPZh+bvXH0zDKfi02prknrScAKC0XhadTHT3Al0QIDAQAB'
        der = base64.standard_b64decode(b64der)
    
        pk = rsa.PublicKey.load_pkcs1_openssl_der(der)
        v1 = rsa.encrypt(bytes(text, 'utf8'), pk)
        value = base64.encodebytes(v1).replace(b'
    ', b'')
        value = value.decode('utf8')
    
        return value
    
    
    session = requests.Session()
    
    i1 = session.get('https://passport.cnblogs.com/user/signin')
    rep = re.compile("'VerificationToken': '(.*)'")
    v = re.search(rep, i1.text)
    verification_token = v.group(1)
    
    form_data = {
        'input1': js_encrypt('wptawy'),
        'input2': js_encrypt('asdfasdf'),
        'remember': False
    }
    
    i2 = session.post(url='https://passport.cnblogs.com/user/signin',
                      data=json.dumps(form_data),
                      headers={
                          'Content-Type': 'application/json; charset=UTF-8',
                          'X-Requested-With': 'XMLHttpRequest',
                          'VerificationToken': verification_token}
                      )
    
    i3 = session.get(url='https://i.cnblogs.com/EditDiary.aspx')
    
    print(i3.text)
    
    博客园
    

      

    #!/usr/bin/env python
    # -*- coding:utf-8 -*-
    
    import requests
    
    
    # 第一步:访问登陆页,拿到X_Anti_Forge_Token,X_Anti_Forge_Code
    # 1、请求url:https://passport.lagou.com/login/login.html
    # 2、请求方法:GET
    # 3、请求头:
    #    User-agent
    r1 = requests.get('https://passport.lagou.com/login/login.html',
                     headers={
                         'User-Agent': 'Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3239.132 Safari/537.36',
                     },
                     )
    
    X_Anti_Forge_Token = re.findall("X_Anti_Forge_Token = '(.*?)'", r1.text, re.S)[0]
    X_Anti_Forge_Code = re.findall("X_Anti_Forge_Code = '(.*?)'", r1.text, re.S)[0]
    print(X_Anti_Forge_Token, X_Anti_Forge_Code)
    # print(r1.cookies.get_dict())
    # 第二步:登陆
    # 1、请求url:https://passport.lagou.com/login/login.json
    # 2、请求方法:POST
    # 3、请求头:
    #    cookie
    #    User-agent
    #    Referer:https://passport.lagou.com/login/login.html
    #    X-Anit-Forge-Code:53165984
    #    X-Anit-Forge-Token:3b6a2f62-80f0-428b-8efb-ef72fc100d78
    #    X-Requested-With:XMLHttpRequest
    # 4、请求体:
    # isValidate:true
    # username:15131252215
    # password:ab18d270d7126ea65915c50288c22c0d
    # request_form_verifyCode:''
    # submit:''
    r2 = requests.post(
        'https://passport.lagou.com/login/login.json',
        headers={
            'User-Agent': 'Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3239.132 Safari/537.36',
            'Referer': 'https://passport.lagou.com/login/login.html',
            'X-Anit-Forge-Code': X_Anti_Forge_Code,
            'X-Anit-Forge-Token': X_Anti_Forge_Token,
            'X-Requested-With': 'XMLHttpRequest'
        },
        data={
            "isValidate": True,
            'username': '15131255089',
            'password': 'ab18d270d7126ea65915c50288c22c0d',
            'request_form_verifyCode': '',
            'submit': ''
        },
        cookies=r1.cookies.get_dict()
    )
    print(r2.text)
    
    拉勾网
    

      

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  • 原文地址:https://www.cnblogs.com/microtiger/p/13625855.html
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