Middleware for parsing cookies in HTTP requests
1. Installation
npm install cookie-parser
2. Basic use
const express = require("express");
const cookieParser = require("cookie-parser");
const app = express();
// Use cookie-parser middleware(cookieParser());
("/", (req, res) => {
// Get the cookies in the request const cookies = ;
("Cookies:", cookies);
("Cookie parsed successfully");
});
const port = 3000;
(port, () => {
(`Server running on port ${port}`);
});2. Analysis and setting Cookies
1. Analytics Cookies
`cookie-parser` will parse the requested cookies into an object and store them in ``. The value of the cookie can be obtained by accessing ``.
("/get-cookie", (req, res) => {
const username = ;
if (username) {
(`Hello, ${username}`);
} else {
("No username cookie found");
}
});2. Set cookies
Use the `()` method to set cookies in the response. This method accepts three parameters: the name, value of the cookie, and optional configuration object.
("/set-cookie", (req, res) => {
// Set a cookie named username with a value of John, valid for 1 hour ("username", "John", { maxAge: 3600000, httpOnly: true });
("Cookie set successfully");
});3. Signature Cookies
`cookie-parser` supports signing of cookies to ensure the integrity and security of cookies. A signature cookie can be used when `cookie-parser` is initialized.
const express = require("express");
const cookieParser = require("cookie-parser");
const app = express();
// Use cookie-parser middleware with key(cookieParser("mysecretkey"));
("/set-signed-cookie", (req, res) => {
// Set a signed cookie ("signedUsername", "Jane", { signed: true });
("Signed cookie set successfully");
});
("/get-signed-cookie", (req, res) => {
// Get signature cookies const signedUsername = ;
if (signedUsername) {
(`Hello, ${signedUsername}`);
} else {
("No signed username cookie found");
}
});
const port = 3000;
(port, () => {
(`Server running on port ${port}`);
});3. Clear cookies
Use the `()` method to clear the client's cookies. You need to specify the name of the cookie to be cleared.
("/clear-cookie", (req, res) => {
("username");
("Cookie cleared successfully");
});This is the end of this article about the detailed explanation of Chinese cookie-parser dependencies. For more related cookie-parser dependencies, please search for my previous articles or continue browsing the related articles below. I hope everyone will support me in the future!