(In the last lesson, we learned the request method in HTTP protocol. The most commonly used one is get, which is used to obtain data from resources on the server, and the other is post, which is used to submit data to resources.So, what should be used to mark the resources on the server? How to distinguish between "this" resource and "that" resource?After learning from the previous talks, you must already know that the URI is used, that is, the uniformresource identifier. Because it often appears in the address bar of the browser, it is commonly known as "network address" or "URL".Strictly speaking, a URI is not exactly equivalent to a web address. It consists of two parts: URL and urn. The web address used in the HTTP world is actually a URL - uniform resource locator. However, because URLs are everywhere, they are usually considered to be exactly equal.)
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