Python爬蟲庫requests獲取響應內容、響應狀態碼、響應頭
阿新 • • 發佈：2020-01-31
首先在程式中引入Requests模組
import requests
一、獲取不同型別的響應內容
在傳送請求後，伺服器會返回一個響應內容，而且requests通常會自動解碼響應內容
1.文字響應內容
獲取文字型別的響應內容
r = requests.get('https://www.baidu.com')
r.text # 通過文字的形式獲取響應內容
'<!DOCTYPE html>\r\n<!--STATUS OK--><html> <head><meta http-equiv=content-type content=text/html;charset=utf-8><meta http-equiv=X-UA-Compatible content=IE=Edge><meta content=always name=referrer><link rel=stylesheet type=text/css href=https://ss1.bdstatic.com/5eN1bjq8AAUYm2zgoY3K/r/www/cache/bdorz/baidu.min.css><title>ç\x99¾åo|ä¸\x80ä¸\x8bï¼\x8cä½\xa0å°±ç\x9f￥é\x81\x93</title></head> <body link=#0000cc> <div id=wrapper> <div id=head> <div class=head_wrapper> <div class=s_form> <div class=s_form_wrapper> <div id=lg> <img hidefocus=true src=//www.baidu.com/img/bd_logo1.png width=270 height=129> </div> <form id=form name=f action=//www.baidu.com/s class=fm> <input type=hidden name=bdorz_come value=1> <input type=hidden name=ie value=utf-8> <input type=hidden name=f value=8> <input type=hidden name=rsv_bp value=1> <input type=hidden name=rsv_idx value=1> <input type=hidden name=tn value=baidu><span class="bg s_ipt_wr"><input id=kw name=wd class=s_ipt value maxlength=255 autocomplete=off autofocus=autofocus></span><span class="bg s_btn_wr"><input type=submit id=su value=ç\x99¾åo|ä¸\x80ä¸\x8b class="bg s_btn" autofocus></span> </form> </div> </div> <div id=u1> <a href=http://news.baidu.com name=tj_trnews class=mnav>æ\x96°é\x97»</a> <a href=https://www.hao123.com name=tj_trhao123 class=mnav>hao123</a> <a href=http://map.baidu.com name=tj_trmap class=mnav>å\x9c°å\x9b¾</a> <a href=http://v.baidu.com name=tj_trvideo class=mnav>è§\x86é￠\x91</a> <a href=http://tieba.baidu.com name=tj_trtieba class=mnav>è′′å\x90§</a> <noscript> <a href=http://www.baidu.com/bdorz/login.gif?login&tpl=mn&u=http%3A%2F%2Fwww.baidu.com%2f%3fbdorz_come%3d1 name=tj_login class=lb>ç\x99»å½\x95</a> </noscript> <script>document.write(\'<a href="http://www.baidu.com/bdorz/login.gif?login&tpl=mn&u=\'+ encodeURIComponent(window.location.href+ (window.location.search === " rel="external nofollow" " ? "?" : "&")+ "bdorz_come=1")+ \'" name="tj_login" class="lb">ç\x99»å½\x95</a>\');\r\n </script> <a href=//www.baidu.com/more/ name=tj_briicon class=bri style="display: block;">æ\x9b′å¤\x9aäo§å\x93\x81</a> </div> </div> </div> <div id=ftCon> <div id=ftConw> <p id=lh> <a href=http://home.baidu.com>å\x853äo\x8eç\x99¾åo|</a> <a href=http://ir.baidu.com>About Baidu</a> </p> <p id=cp>©2017Baidu<a href=http://www.baidu.com/duty/>使ç\x94¨ç\x99¾åo|å\x89\x8då¿\x85èˉ»</a> <a href=http://jianyi.baidu.com/ class=cp-feedback>æ\x84\x8fè§\x81å\x8f\x8dé|\x88</a>äo¬ICPèˉ\x81030173å\x8f· <img src=//www.baidu.com/img/gs.gif> </p> </div> </div> </div> </body> </html>\r\n'
通過encoding來獲取響應內容的編碼以及修改編碼
r.encoding
'ISO-8859-1'
2.二進位制響應內容
r.content # 通過content獲取的內容便是二進位制型別的
3.JSON響應內容
r.json()
4.原始響應內容
r = requests.get('https://www.baidu.com',stream=True)
print(r.raw) # 就是urllib中的HTTPResponse物件
print(r.raw.read(10))
<requests.packages.urllib3.response.HTTPResponse object at 0x00000077940AEEF0> b'\x1f\x8b\x08\x00\x00\x00\x00\x00\x00\x03'
二、響應狀態碼
獲取響應狀態碼
r = requests.get('https://www.baidu.com')
r.status_code
200
判斷響應狀態碼
r.status_code == requests.codes.ok
True
當傳送一個錯誤請求時，丟擲異常
bad_r = requests.get('http://httpbin.org/status/404')
print(bad_r.status_code)
bad_r.raise_for_status()
404
---------------------------------------------------------------------------
HTTPError Traceback (most recent call last)
<ipython-input-15-9b812f4c5860> in <module>()
1 bad_r = requests.get('http://httpbin.org/status/404')
2 print(bad_r.status_code)
----> 3 bad_r.raise_for_status()
D:\Anaconda3\lib\site-packages\requests\models.py in raise_for_status(self)
926
927 if http_error_msg:
--> 928 raise HTTPError(http_error_msg,response=self)
929
930 def close(self):
HTTPError: 404 Client Error: NOT FOUND for url: http://httpbin.org/status/404三、響應頭
獲取響應頭
r = requests.get('https://www.baidu.com')
r.headers
{'Cache-Control': 'private,no-cache,no-store,proxy-revalidate,no-transform','Connection': 'Keep-Alive','Content-Encoding': 'gzip','Content-Type': 'text/html','Date': 'Mon,23 Jul 2018 09:04:12 GMT','Last-Modified': 'Mon,23 Jan 2017 13:23:51 GMT','Pragma': 'no-cache','Server': 'bfe/1.0.8.18','Set-Cookie': 'BDORZ=27315; max-age=86400; domain=.baidu.com; path=/','Transfer-Encoding': 'chunked'}
獲取響應頭的具體欄位
print(r.headers['Server'])
print(r.headers.get('Server'))
bfe/1.0.8.18 bfe/1.0.8.18
更多關於Python爬蟲庫requestsr的使用方法請檢視下面的相關連結