The difference between Http status codes 301 and 302 and enterprise application cases
Original: http://blog.51cto.com/oldboy/1774260
1. What is a 301 redirect?
301 redirects/jumps are general, indicating that this webpage is permanently transferred to another address.
301 is Permanently Moved, a common SEO move, which will transfer the PR and other information of the old page to the new page;
2. What is a 302 redirect?
302 Redirect means Temporarily Moved and is used when a web page URL needs to change for a short period of time.
3. The difference between 301 redirect and 302 redirect
A 301 redirect is a permanent redirect where search engines crawl new content and replace the old URL with the redirected URL.
302 redirects are temporary redirects where search engines crawl new content while keeping old URLs. Because the server returns a 302 code, the search engine considers the new URL to be temporary.
4. Application cases of common websites
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[root@oldboy ~]
# curl -s -o /dev/null -I -w "%{http_code}\n" http://www.etiantian.org
200
[root@oldboy ~]
# curl -s -o /dev/null -I -w "%{http_code}\n" http://etiantian.org
200
[root@oldboy ~]
# curl -s -o /dev/null -I -w "%{http_code}\n" http://baidu.com
200
[root@oldboy ~]
# curl -s -o /dev/null -I -w "%{http_code}\n" http://taobao.com
302
[root@oldboy ~]
# curl -s -o /dev/null -I -w "%{http_code}\n" http://qq.com
302
[root@oldboy ~]
# curl -s -o /dev/null -I -w "%{http_code}\n" http://jd.com
302
[root@oldboy ~]
# curl -s -o /dev/null -I -w "%{http_code}\n" http://51cto.com
301
[root@oldboy ~]
# curl -s -o /dev/null -I -w "%{http_code}\n" http://sina.com.cn
301
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For more http status code knowledge, please visit http://oldboy.blog.51cto.com/2561410/716294