What does the website return 503 mean?

The website returns 503 indicating that server resources are temporarily unavailable. When the client sends a request to the server, the server will give a response and then return an http status code, such as 403, indicating no permission to access.

When the client sends a request to the server, the server will give a response and then return an http status code. Of course, this status code has There are many kinds, and 503 is also one of them. The 503 status code means that the server tells the client that the server resources are temporarily unavailable.

In addition to 503, there are other common status codes:

200 - Normally available

301 - Permanent redirection

302 - Temporary Sexual redirection

403 - No permission to access

404 - Resource not found

500 - Server internal configuration error

503 - —The server is temporarily unavailable

As mentioned above, 503 is temporarily unavailable. It tells the user that the website is temporarily unavailable and cannot be viewed again later. At the same time, it also tells the search engine spider, Then spiders will come frequently to crawl content in the near future. But what if the website returns 404 directly? In this case, the search engine will directly think that this page does not exist, and will not crawl it in the future.

Therefore, it is recommended that if the website cannot be opened temporarily due to maintenance, you can return 503. Try not to return 404 at this time to prevent search engines from deleting our data in the index database.

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