📅 最后修改于: 2020-11-06 06:28:27 🧑 作者: Mango
在接收并解释了请求消息后，服务器将以HTTP响应消息进行响应。响应消息具有状态码。它是一个三位数的整数，其中状态代码的第一位数定义了响应的类别，而后两位则没有任何分类作用。第一位数字有5个值：
| S.N. | Code and Description |
|---|---|
| 1 | 1xx: Informational
It means the request was received and the process is continuing. |
| 2 | 2xx: Success
It means the action was successfully received, understood, and accepted. |
| 3 | 3xx: Redirection
It means further action must be taken in order to complete the request. |
| 4 | 4xx: Client Error
It means the request contains incorrect syntax or cannot be fulfilled. |
| 5 | 5xx: Server Error
It means the server failed to fulfill an apparently valid request. |
在下面的示例中，我们从URL访问文件，并且响应成功。因此，返回的状态码为200。
import urllib3
http = urllib3.PoolManager()
resp = http.request('GET', 'http://tutorialspoint.com/robots.txt')
print resp.data
# get the status of the response
print resp.status
当我们运行上面的程序时，我们得到以下输出-
User-agent: *
Disallow: /tmp
Disallow: /logs
Disallow: /rate/*
Disallow: /cgi-bin/*
Disallow: /videotutorials/video_course_view.php?*
Disallow: /videotutorials/course_view.php?*
Disallow: /videos/*
Disallow: /*/*_question_bank/*
Disallow: //*/*/*/*/src/*
200
在下面的示例中，我们从不存在的url访问文件。响应不成功。因此，返回的状态码是403。
import urllib3
http = urllib3.PoolManager()
resp = http.request('GET', 'http://tutorialspoint.com/robot.txt')
print resp.data
# get the status of the response
print resp.status
当我们运行上面的程序时，我们得到以下输出-
403 Forbidden
Forbidden
You don't have permission to access /robot.txt
on this server.
403