Egg framework usage (2)

Table of Contents

router router

The relationship between the static resources and routing of the egg framework

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router router

There is a device in life called a router: the user sends the request data to the router, and the router connects to different servers according to the user's needs.

Routing: Refers to different URLs to execute different branches or programs.

 router.get('/ajax1',controller.user.ajax1); //Register routing

Analysis: The user sends the requested URL /ajax1 to the router, and the router executes its corresponding program controller.user.ajax1 according to the URL requested by the user, and then returns the corresponding result.

egg frameThe relationship between static resources and routing

1. When the user enters the URL, check the static hosting directory (public folder) for the required resources, read the static file and send it to the user, if notJust go to the router.js folder to see if there is a matching registration URL, call the corresponding function to execute, if not, return 404 Not Found

Note: When registering a route, the route name should not conflict with the static file name, otherwise the static resources will be preferentially accessed.

2. When the registered routes have the same, only the first one will be matched, and the following ones will not be matched again:

Analysis: When the user enters ip:port/ajax1, only the first /ajax1 will be matched and then controller.user.ajax1 will be executed, which is equivalent to res.end(), and a request will only run once.

3. router.get('/*',controller.home.all); The meaning of this code is:

 router.get('/*',controller.home.all);

Analysis: '/*' means any URL entered by the browser can be matched

If:

 //The code order is like this:router.get("/*",controller.home.all);router.get('/', controller.home.index);router.get('/ajax1',controller.user.ajax1);

 async all() {this.ctx.body = 'return a front-end interface' //return to the front-end}

Enter the URL in the browser: 127.0.0.1:7001/ajax1 to visitCan't reach /ajax1 because '/*' is accessed

Summary: When routing network requests in egg, the processing properties of the backend: static files > route matching (matching in order)

'/*' signal routing means all URLs match