python requests request library

requests library

Example introduction

import requests
res = requests.get('https://www.baidu.com')
print(type(res))
print(res.status_code)
print(res.text)
print(type(res.text))
print(res.cookies)

various request methods

import requests
requests.post('http://httpbin.org/post')
requests.put('http://httpbin.org/put')
requests.delete('http://httpbin.org/delete')
requests.head('http://httpbin.org/get')
requests.options('http://httpbin.org/get')

ask

basic request

Basic spelling

import requests
res = requests.get('http://httpbin.org/get')
print(res.text)

get request with parameters

import requests
res = requests.get('http://httpbin.org/get?name=xbp&age=18')
print(res.text)

import requests
data = {
    'name':'xbp',
    'age':18
}
res = requests.get('http://httpbin.org/get',params=data)
print(res.text)

Parse json

import requests
import json
res = requests.get('http://httpbin.org/get')
print(type(res.text))
#res.json()与json.loads()方法完全一致
print(res.json())
print(json.loads(res.text))
print(type(res.json()))

get binary data

import requests
res = requests.get('https://github.com/favicon.ico')
print(type(res.text),type(res.content))
print(res.text)
print(res.content)

#保存二进制数据
import requests
res = requests.get('https://github.com/favicon.ico')
with open(r'github.ico','wb') as f:
    f.write(res.content)
    f.close()

add headers

import requests
res = requests.get('https://www.zhihu.com/explore')
print(res.text)

import requests
headers = {
    'User-Agent':'Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/66.0.3343.4 Safari/537.36'
}
res = requests.get('https://www.zhihu.com/explore',headers = headers)
print(res.text)

Basic post request

import requests
data = {
    'name':'xbp',
    'age':18
}
res = requests.post('http://httpbin.org/post',data=data)
print(res.text)

import requests
data = {
    'name':'xbp',
    'age':18
}
headers = {
    'User-Agent':'Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/66.0.3343.4 Safari/537.36'
}
res = requests.post('http://httpbin.org/post',data=data,headers = headers)
print(res.text)

response

response property

import requests
res = requests.get('https://www.baidu.com')
print(type(res.status_code),res.status_code)
print(type(res.headers),res.headers)
print(type(res.cookies),res.cookies)
print(type(res.url),res.url)
print(type(res.history),res.history)

Status code judgment (see the official documentation for details)

import requests
res = requests.get('https://www.baidu.com')
exit() if not res.status_code == requests.codes.ok else print('Requests Successfully')

import requests
res = requests.get('https://www.baidu.com')
exit() if not res.status_code == 200 else print('Requests Successfully')

Advanced Operations

File Upload

import requests
files = {'file':open('github.ico','rb')}
res = requests.post('http://httpbin.org/post',files = files)
print(res.text)

get cookies

import requests
headers = {
    'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/66.0.3343.4 Safari/537.36',
}
res = requests.get('https://www.baidu.com',headers=headers)
# print(res.cookies)
for key,value in res.cookies.items():
    print(key+'='+value)

session maintenance

Simulate login

#获取不到，因为相当于在一个浏览器中访问，在另一个浏览器中获取cookies,两个没有关联
import requests
requests.get('http://httpbin.org/cookies/set/number/1234568')
res = requests.get('http://httpbin.org/cookies')
print(res.text)

import requests
s = requests.Session()
s.get('http://httpbin.org/cookies/set/number/1234568')
res = s.get('http://httpbin.org/cookies')
print(res.text)

Certificate verification

import requests
res = requests.get('https://www.12306.cn')
print(res.status_code)
#抛出一个error

import requests
from requests.packages import urllib3
urllib3.disable_warnings()
res = requests.get('https://www.12306.cn',verify=False)
print(res.status_code)

#指定证书
import requests
res = requests.get('https://www.12306.cn'，cert=('/path/server.crt','/path/key'))
print(res.status_code)