Requests
Python标准库中提供了：urllib、urllib2、httplib等模块以供Http请求，
但是，它的 API 太渣了。它是为另一个时代、另一个互联网所创建的。
它需要巨量的工作，甚至包括各种方法覆盖，来完成最简单的任务。
Requests 是使用 Apache2 Licensed 许可证的 基于Python开发的HTTP 库，
其在Python内置模块的基础上进行了高度的封装，从而使得Pythoner进行网络请求时，
变得美好了许多，使用Requests可以轻而易举的完成浏览器可有的任何操作。
简介
安装：
pip install requests
requests常用属性：
response = requests.get(url) response.text response.content response.encoding response.apparent_encoding response.status_code 301 永久重定向 302 临时重定向 response.cookies.get_dict()
1、GET请求
1、无参数实例
import requests ret = requests.get('https://github.com/timeline.json') print ret.url print ret.text
2、有参数实例
import requests payload = {'key1': 'value1', 'key2': 'value2'} ret = requests.get("http://httpbin.org/get", params=payload) print ret.url print ret.text
2、POST请求
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
3、其他请求
requests.get(url, params=None, **kwargs) requests.post(url, data=None, json=None, **kwargs) requests.put(url, data=None, **kwargs) requests.head(url, **kwargs) requests.delete(url, **kwargs) requests.patch(url, data=None, **kwargs) requests.options(url, **kwargs) # 以上方法均是在此方法的基础上构建 requests.request(method, url, **kwargs)
4、更多参数
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]> """ 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/') 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')) 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'}) 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) 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) 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) 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)
