Nit-isha / Express-practice

HTTP Methods

• GET
• POST
• PUT
• DELETE
• ALL
• USE
• LISTEN

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General structure of request message

• Request URL
• Request Method
• Status Code : 200 OK
• Remote Address

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General structure of response message

• Request URL
• Request Method
• Status Code : 400 means request error, 404: Not found
• Remote Address
• We get json data application/json

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• For http we have port : 80
• For SSH(secure shell) : 22
• For https protocol : port 443

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HTTP response status codes

• https://developer.mozilla.org/en-US/docs/Web/HTTP/Status

MIME

• https://developer.mozilla.org/en-US/docs/Web/HTTP/Basics_of_HTTP/MIME_types

express.static (static status)

• Built in middleware
• static asset means server doesn't have to change it.
• Common names of folder is "public or static".
• img, css, js files can be added.

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API vs SSR(server side rendering)

• API -JSON and SSR - Template
• Send data vs send template
• Res.json() vs res.render()

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response.json()

• https://expressjs.com/en/4x/api.html#res.json

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query

• e.g. /search?query=foo&tags=story
• sort
• ? searching from database

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Middleware

• Functions that execute during the request to the server.
• Each middleware has access to request ans response object.
• req => middleware => res
• use vs route
• options: our own, express, third party
• URL encoded middleware https://expressjs.com/en/5x/api.html#express.urlencoded

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