requests

作者: shuff1e | 来源:发表于2018-03-04 10:57 被阅读20次

https://www.cnblogs.com/lei0213/p/6957508.html
https://www.cnblogs.com/lilinwei340/p/6417689.html
http://docs.python-requests.org/zh_CN/latest/user/quickstart.html

基本用法，不带参数的get

>>> import requests
>>> r= requests.get("http://www.baidu.com")
>>> r.status_code
200
>>> r.text
u'<!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=http://s1.bdstatic.com/r/www/cache/bdorz/baidu.min.css><title>\xe7\x99\xbe\xe5\xba\xa6\xe4\xb8\x80\xe4\xb8\x8b\xef\xbc\x8c\xe4\xbd\xa0\xe5\xb0\xb1\xe7\x9f\xa5\xe9\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></span><span class="bg s_btn_wr"><input type=submit id=su value=\xe7\x99\xbe\xe5\xba\xa6\xe4\xb8\x80\xe4\xb8\x8b class="bg s_btn"></span> </form> </div> </div> <div id=u1> <a href=http://news.baidu.com name=tj_trnews class=mnav>\xe6\x96\xb0\xe9\x97\xbb</a> <a href=http://www.hao123.com name=tj_trhao123 class=mnav>hao123</a> <a href=http://map.baidu.com name=tj_trmap class=mnav>\xe5\x9c\xb0\xe5\x9b\xbe</a> <a href=http://v.baidu.com name=tj_trvideo class=mnav>\xe8\xa7\x86\xe9\xa2\x91</a> <a href=http://tieba.baidu.com name=tj_trtieba class=mnav>\xe8\xb4\xb4\xe5\x90\xa7</a> <noscript> <a href=http://www.baidu.com/bdorz/login.gif?login&amp;tpl=mn&amp;u=http%3A%2F%2Fwww.baidu.com%2f%3fbdorz_come%3d1 name=tj_login class=lb>\xe7\x99\xbb\xe5\xbd\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 === "" ? "?" : "&")+ "bdorz_come=1")+ \'" name="tj_login" class="lb">\xe7\x99\xbb\xe5\xbd\x95</a>\');</script> <a href=//www.baidu.com/more/ name=tj_briicon class=bri style="display: block;">\xe6\x9b\xb4\xe5\xa4\x9a\xe4\xba\xa7\xe5\x93\x81</a> </div> </div> </div> <div id=ftCon> <div id=ftConw> <p id=lh> <a href=http://home.baidu.com>\xe5\x85\xb3\xe4\xba\x8e\xe7\x99\xbe\xe5\xba\xa6</a> <a href=http://ir.baidu.com>About Baidu</a> </p> <p id=cp>&copy;2017&nbsp;Baidu&nbsp;<a href=http://www.baidu.com/duty/>\xe4\xbd\xbf\xe7\x94\xa8\xe7\x99\xbe\xe5\xba\xa6\xe5\x89\x8d\xe5\xbf\x85\xe8\xaf\xbb</a>&nbsp; 
<a href=http://jianyi.baidu.com/ class=cp-feedback>\xe6\x84\x8f\xe8\xa7\x81\xe5\x8f\x8d\xe9\xa6\x88</a>&nbsp;\xe4\xba\xacICP\xe8\xaf\x81030173\xe5\x8f\xb7&nbsp; <img src=//www.baidu.com/img/gs.gif> </p> </div> </div> </div> </body> </html>\r\n'
>>> r.encoding='utf-8'
>>> r.text
u'<!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=http://s1.bdstatic.com/r/www/cache/bdorz/baidu.min.css><title>\u767e\u5ea6\u4e00\u4e0b\uff0c\u4f60\u5c31\u77e5\u9053</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></span><span class="bg s_btn_wr"><input type=submit id=su value=\u767e\u5ea6\u4e00\u4e0b class="bg s_btn"></span> </form> </div> </div> <div id=u1> <a href=http://news.baidu.com name=tj_trnews class=mnav>\u65b0\u95fb</a> <a href=http://www.hao123.com name=tj_trhao123 class=mnav>hao123</a> <a href=http://map.baidu.com name=tj_trmap class=mnav>\u5730\u56fe</a> <a href=http://v.baidu.com name=tj_trvideo class=mnav>\u89c6\u9891</a> <a href=http://tieba.baidu.com name=tj_trtieba class=mnav>\u8d34\u5427</a> <noscript> <a href=http://www.baidu.com/bdorz/login.gif?login&amp;tpl=mn&amp;u=http%3A%2F%2Fwww.baidu.com%2f%3fbdorz_come%3d1 name=tj_login class=lb>\u767b\u5f55</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 === "" ? "?" : "&")+ "bdorz_come=1")+ \'" name="tj_login" class="lb">\u767b\u5f55</a>\');</script> <a href=//www.baidu.com/more/ name=tj_briicon class=bri style="display: block;">\u66f4\u591a\u4ea7\u54c1</a> </div> </div> </div> <div id=ftCon> <div id=ftConw> <p id=lh> <a href=http://home.baidu.com>\u5173\u4e8e\u767e\u5ea6</a> <a href=http://ir.baidu.com>About Baidu</a> </p> <p id=cp>&copy;2017&nbsp;Baidu&nbsp;<a href=http://www.baidu.com/duty/>\u4f7f\u7528\u767e\u5ea6\u524d\u5fc5\u8bfb</a>&nbsp;
 <a href=http://jianyi.baidu.com/ class=cp-feedback>\u610f\u89c1\u53cd\u9988</a>&nbsp;\u4eacICP\u8bc1030173\u53f7&nbsp; <img src=//www.baidu.com/img/gs.gif> </p> </div> </div> </div> </body> </html>\r\n'
>>> print u'\u610f\u89c1\u53cd\u9988'   
意见反馈
>>> r.content
'<!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=http://s1.bdstatic.com/r/www/cache/bdorz/baidu.min.css><title>\xe7\x99\xbe\xe5\xba\xa6\xe4\xb8\x80\xe4\xb8\x8b\xef\xbc\x8c\xe4\xbd\xa0\xe5\xb0\xb1\xe7\x9f\xa5\xe9\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></span><span class="bg s_btn_wr"><input type=submit id=su value=\xe7\x99\xbe\xe5\xba\xa6\xe4\xb8\x80\xe4\xb8\x8b class="bg s_btn"></span> </form> </div> </div> <div id=u1> <a href=http://news.baidu.com name=tj_trnews class=mnav>\xe6\x96\xb0\xe9\x97\xbb</a> <a href=http://www.hao123.com name=tj_trhao123 class=mnav>hao123</a> <a href=http://map.baidu.com name=tj_trmap class=mnav>\xe5\x9c\xb0\xe5\x9b\xbe</a> <a href=http://v.baidu.com name=tj_trvideo class=mnav>\xe8\xa7\x86\xe9\xa2\x91</a> <a href=http://tieba.baidu.com name=tj_trtieba class=mnav>\xe8\xb4\xb4\xe5\x90\xa7</a> <noscript> <a href=http://www.baidu.com/bdorz/login.gif?login&amp;tpl=mn&amp;u=http%3A%2F%2Fwww.baidu.com%2f%3fbdorz_come%3d1 name=tj_login class=lb>\xe7\x99\xbb\xe5\xbd\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 === "" ? "?" : "&")+ "bdorz_come=1")+ \'" name="tj_login" class="lb">\xe7\x99\xbb\xe5\xbd\x95</a>\');</script> <a href=//www.baidu.com/more/ name=tj_briicon class=bri style="display: block;">\xe6\x9b\xb4\xe5\xa4\x9a\xe4\xba\xa7\xe5\x93\x81</a> </div> </div> </div> <div id=ftCon> <div id=ftConw> <p id=lh> <a href=http://home.baidu.com>\xe5\x85\xb3\xe4\xba\x8e\xe7\x99\xbe\xe5\xba\xa6</a> <a href=http://ir.baidu.com>About Baidu</a> </p> <p id=cp>&copy;2017&nbsp;Baidu&nbsp;<a href=http://www.baidu.com/duty/>\xe4\xbd\xbf\xe7\x94\xa8\xe7\x99\xbe\xe5\xba\xa6\xe5\x89\x8d\xe5\xbf\x85\xe8\xaf\xbb</a>&nbsp; 
<a href=http://jianyi.baidu.com/ class=cp-feedback>\xe6\x84\x8f\xe8\xa7\x81\xe5\x8f\x8d\xe9\xa6\x88</a>&nbsp;\xe4\xba\xacICP\xe8\xaf\x81030173\xe5\x8f\xb7&nbsp; <img src=//www.baidu.com/img/gs.gif> </p> </div> </div> </div> </body> </html>\r\n'
>>> r.content.decode('utf-8')
u'<!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=http://s1.bdstatic.com/r/www/cache/bdorz/baidu.min.css><title>\u767e\u5ea6\u4e00\u4e0b\uff0c\u4f60\u5c31\u77e5\u9053</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></span><span class="bg s_btn_wr"><input type=submit id=su value=\u767e\u5ea6\u4e00\u4e0b class="bg s_btn"></span> </form> </div> </div> <div id=u1> <a href=http://news.baidu.com name=tj_trnews class=mnav>\u65b0\u95fb</a> <a href=http://www.hao123.com name=tj_trhao123 class=mnav>hao123</a> <a href=http://map.baidu.com name=tj_trmap class=mnav>\u5730\u56fe</a> <a href=http://v.baidu.com name=tj_trvideo class=mnav>\u89c6\u9891</a> <a href=http://tieba.baidu.com name=tj_trtieba class=mnav>\u8d34\u5427</a> <noscript> <a href=http://www.baidu.com/bdorz/login.gif?login&amp;tpl=mn&amp;u=http%3A%2F%2Fwww.baidu.com%2f%3fbdorz_come%3d1 name=tj_login class=lb>\u767b\u5f55</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 === "" ? "?" : "&")+ "bdorz_come=1")+ \'" name="tj_login" class="lb">\u767b\u5f55</a>\');</script> <a href=//www.baidu.com/more/ name=tj_briicon class=bri style="display: block;">\u66f4\u591a\u4ea7\u54c1</a> </div> </div> </div> <div id=ftCon> <div id=ftConw> <p id=lh> <a href=http://home.baidu.com>\u5173\u4e8e\u767e\u5ea6</a> <a href=http://ir.baidu.com>About Baidu</a> </p> <p id=cp>&copy;2017&nbsp;Baidu&nbsp;<a href=http://www.baidu.com/duty/>\u4f7f\u7528\u767e\u5ea6\u524d\u5fc5\u8bfb</a>&nbsp; 
<a href=http://jianyi.baidu.com/ class=cp-feedback>\u610f\u89c1\u53cd\u9988</a>&nbsp;\u4eacICP\u8bc1030173\u53f7&nbsp; <img src=//www.baidu.com/img/gs.gif> </p> </div> </div> </div> </body> </html>\r\n'

response.text返回的是Unicode格式，通常需要转换为utf-8格式，否则就是乱码。response.content是二进制模式，可以下载视频之类的，如果想看的话需要decode成utf-8格式。
不管是通过response.content.decode("utf-8)的方式还是通过response.encoding="utf-8"的方式都可以避免乱码的问题发生

返回json数据

>>> r=requests.get(url)
>>> r.json()
{u'origin': u'119.188.152.50', u'headers': {u'Connection': u'close', u'Host': u'httpbin.org', u'Accept-Encoding': u'gzip, deflate', u'Accept': u'*/*', u'User-Agent': u'python-requests/2.18.4'}, u'args': {}, u'url': u'http://httpbin.org/get'}

{
  "args": {}, 
  "headers": {
    "Accept": "text/html, application/xhtml+xml, image/jxr, */*", 
    "Accept-Encoding": "gzip, deflate", 
    "Accept-Language": "zh-CN", 
    "Connection": "close", 
    "Cookie": "_gauges_unique_hour=1; _gauges_unique_month=1; _gauges_unique_day=1; _gauges_unique=1; _gauges_unique_year=1", 
    "Host": "httpbin.org", 
    "Referer": "http://httpbin.org/", 
    "User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.110 Safari/537.36 Edge/16.16299"
  }, 
  "origin": "223.26.73.150", 
  "url": "http://httpbin.org/get"
}

带参数的get

>>> payload={'key1':'value1','key2':'value2'}
>>> import json
>>> r=requests.get(url,params=json.dumps(payload))

>>> r.json()
{u'origin': u'119.188.152.53', u'headers': {u'Connection': u'close', u'Host': u'httpbin.org', u'Accept-Encoding': u'gzip, deflate', u'Accept': u'*/*', u'User-Agent': u'python-requests/2.18.4'}, u'args': {u'{"key2": "value2", "key1": "value1"}': u''}, u'url': u'http://httpbin.org/get?{"key2": "value2", "key1": "value1"}'}

浏览器中直接访问http://httpbin.org/get?key2=value2&key1=value1

{
  "args": {
    "key1": "value1", 
    "key2": "value2"
  }, 
  "headers": {
    "Accept": "text/html, application/xhtml+xml, image/jxr, */*", 
    "Accept-Encoding": "gzip, deflate", 
    "Accept-Language": "zh-CN", 
    "Connection": "close", 
    "Cookie": "_gauges_unique_hour=1; _gauges_unique_month=1; _gauges_unique_day=1; _gauges_unique=1; _gauges_unique_year=1", 
    "Host": "httpbin.org", 
    "User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.110 Safari/537.36 Edge/16.16299"
  }, 
  "origin": "223.26.73.150", 
  "url": "http://httpbin.org/get?key2=value2&key1=value1"
}

添加header
　　首先说，为什么要加header（头部信息）呢？例如下面，我们试图访问知乎的登录页面（当然大家都你要是不登录知乎，就看不到里面的内容），我们试试不加header信息会报什么错。

>>> url = 'http://www.zhihu.com/' 
>>> r=requests.get(url)           
>>> r.encoding='utf-8'
>>> r.text
u'<html><body><h1>500 Server Error</h1>\nAn internal server error occured.\n</body></html>\n'

结果：
提示发生内部服务器错误（也就说你连知乎登录页面的html都下载不下来）。
使用chrome浏览器查看当前网页的http头:http://blog.sina.com.cn/s/blog_809ff62a01018jzq.html

image.png
我的get()方法出问题了，参考https://www.cnblogs.com/lei0213/p/6957508.html

import requests
 
url = 'https://www.zhihu.com/'
headers = {
    'User-Agent':'Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/57.0.2987.133 Safari/537.36'
}
response = requests.get(url,headers=headers)
print(response.text)

基本post请求：
通过post把数据提交到url地址，等同于一字典的形式提交form表单里面的数据
参考https://www.cnblogs.com/lei0213/p/6957508.html

>>> import requets
>>> url='http://httpbin.org/post'
>>> data = {
...     'name':'jack',
...     'age':'23'
...     }
>>> response = requests.post(url,data=json.dumps(data))
>>> response.text
u'{\n  "args": {}, \n  "data": "", \n  "files": {}, \n  "form": {\n    "age": "23", \n    "name": "jack"\n  }, \n  "headers": {\n    "Accept": "*/*", \n    "Accept-Encoding": "gzip, deflate", \n    "Connection": "close", \n    "Content-Length": "16", \n    "Content-Type": "application/x-www-form-urlencoded", \n    "Host": "httpbin.org", \n    "User-Agent": "python-requests/2.18.4"\n  }, \n  "json": null, \n  "origin": "119.188.152.53", \n  "url": "http://httpbin.org/post"\n}\n'

{
  "args": {}, 
  "data": "", 
  "files": {}, 
  "form": {
    "age": "23", 
    "name": "jack"
  }, 
  "headers": {
    "Accept": "*/*", 
    "Accept-Encoding": "gzip, deflate", 
    "Connection": "close", 
    "Content-Length": "16", 
    "Content-Type": "application/x-www-form-urlencoded", 
    "Host": "httpbin.org", 
    "User-Agent": "python-requests/2.13.0"
  }, 
  "json": null, 
  "origin": "118.144.137.95", 
  "url": "http://httpbin.org/post"
}

requests

相关文章

网友评论

延伸阅读

深度阅读

栏目导航

热点阅读