About HTTP request common status codes

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200: refers to all normal

302: refers to redirect

304: get local cache (in case the page does not change, it will display this status code when accessed again)

404: Without this resource

500: Server Error



among them

In response to some of the details in the header:

Last-Modified: last modified resource access

IF-Modified_Since: local time on the modified time

Corresponding summary of some of the problems:


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Origin blog.csdn.net/weixin_39921821/article/details/90765130