python的requests模塊參數詳解

import requests

print(dir(requests))

# 一、方法
# ['ConnectTimeout', 'ConnectionError', 'DependencyWarning', 'FileModeWarning', 'HTTPError', 'NullHandler', 'PreparedRequest', 'ReadTimeout', 'Request', 'RequestException', 'RequestsDependencyWarning', 'Response', 'Session', 'Timeout', 'TooManyRedirects', 'URLRequired', '__author__', '__author_email__', '__build__', '__builtins__', '__cached__', '__cake__', '__copyright__', '__description__', '__doc__', '__file__', '__license__', '__loader__', '__name__', '__package__', '__path__', '__spec__', '__title__', '__url__', '__version__', '_check_cryptography', '_internal_utils', 'adapters', 'api', 'auth', 'certs', 'chardet', 'check_compatibility', 'codes', 'compat', 'cookies', 'delete', 'exceptions', 'get', 'head', 'hooks', 'logging', 'models', 'options', 'packages', 'patch', 'post', 'put', 'request', 'session', 'sessions', 'status_codes', 'structures', 'urllib3', 'utils', 'warnings']


# 二、參數
requests.get(
    url="http://www.baidu.com",
    headers="",
    cookies="",
    params={"k1":"v1","k2":"v2"},
    # url中傳遞的參數，效果以下
    # http://www.baidu.com?k1=v1&k2=v2
)

requests.post(
    url="",
    headers="",
    cookies="",
    data={
    },
    params={"k1": "v1", "k2": "v2"},
    # url中傳遞的參數，效果以下
    # http://www.baidu.com?k1=v1&k2=v2
)

# 咱們能夠經過data傳遞請求體，也能夠經過json傳遞請求體

data = {
        "username":"admin",
        "pwd":"admin"
       },

# 則請求體中的數據爲username=admin&pwd=admin


# 參數json

json = {
        "username":"admin",
        "pwd":"admin"
       },

# 則請求體中的數據爲{"username":"admin","pwd":"admin"}

# 參數代理

    # 定義一個字典
proxies = {
    "http":"61.24.25.21",
    "https":"http://65.21.24.1"
}



# http請求走http對應的地址，https請求走https對應的地址，在訪問的請求中加一個proxies的參數
l1 = requests.get(url="https://passport.lagou.com/login/login.html",
                  headers={
                      "user-agent": "Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/57.0.2987.133 Safari/537.36"
                  },
                  proxies = proxies
                  )

# 給代理加認證
from requests.auth import HTTPProxyAuth
proxies = {
    "http":"61.24.25.21",
    "https":"http://65.21.24.1"
}
auth = HTTPProxyAuth("username","passwd")

# http請求走http對應的地址，https請求走https對應的地址，在訪問的請求中加一個proxies的參數,在加一個參數auth，這個是登錄代理的用戶名和密碼
l2 = requests.get(url="https://passport.lagou.com/login/login.html",
                  headers={
                      "user-agent": "Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/57.0.2987.133 Safari/537.36"
                  },
                  proxies = proxies,
                  auth = auth
                  )


# 參數文件上傳，post方法發送請求，傳遞一個file的參數

file= {
    "f1":open("a.txt","rb")
}
l3 = requests.post(url="https://passport.lagou.com/login/login.html",
                  headers={
                      "user-agent": "Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/57.0.2987.133 Safari/537.36"
                  },
                  proxies = proxies,
                  auth = auth,
                  file = file
                  )


# 能夠設置上傳文件的名稱，前面的例子上傳的文件的名稱就是文件自己的名稱
file= {
    "f1":("new_file_name",open("a.txt","rb"))
}
l4 = requests.post(url="https://passport.lagou.com/login/login.html",
                  headers={
                      "user-agent": "Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/57.0.2987.133 Safari/537.36"
                  },
                  proxies = proxies,
                  auth = auth,
                  file = file
                  )

# 參數認證
from requests.auth import HTTPBasicAuth
from requests.auth import HTTPDigestAuth

l5 = requests.get(url="https://passport.lagou.com/login/login.html",
                  headers={
                      "user-agent": "Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/57.0.2987.133 Safari/537.36"
                  },
                  proxies = proxies,
                  auth = HTTPBasicAuth("admin","admin")
                  )


# 超時參數
l6 = requests.get(url="https://passport.lagou.com/login/login.html",
                  headers={
                      "user-agent": "Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/57.0.2987.133 Safari/537.36"
                  },
                  timeout = 2
                  )

# 超時時間爲2s，2s連不上返回錯誤


# 容許重定向
l7 = requests.get(url="https://passport.lagou.com/login/login.html",
                  headers={
                      "user-agent": "Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/57.0.2987.133 Safari/537.36"
                  },
                  allow_redirects = False
                  )


# stream大文件下載的參數，把文件一點一點的下載,若是這個值爲false，則所有寫到內存中了

from contextlib import closing
with closing(requests.get("http://ddddddd",stream=True)) as f:
    for i in f.iter_content():
        print(i)


# cert，證書參數，告訴request去這個地方去下載cert
l8 = requests.get(url="https://passport.lagou.com/login/login.html",cert="xxx/xxx/xxx/xxx/pem")

l9 = requests.get(url="https://passport.lagou.com/login/login.html",cert=("xxx/xxx/xxx/xxx/pem","yyy/yyy/yyy.key"))


# session，爲咱們自動帶上cookies和請求頭
import requests
session = requests.session()

i1 = session.get(url="")


i2 = session.post(
    url="",
    data={}
)

i3 = session.post()

　　

 

 

 

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經過request發送post請求，何時使用data參數，何時使用json參數呢，能夠經過抓包來分析

 

在chrom瀏覽器中，數據格式爲Form Data，若是經過requests發送數據，則用data來發送數據

在chrom瀏覽器中，數據格式爲Request Payload，若是經過requests發送，則用json來發送數據

 

若是傳遞的json格式，可是數據有中文呢就額能夠使用下面的方式來發送數據

data = bytes(json.dumps(
                data_dict,
                ensure_ascii=False
            ),encoding="utf-8")