What is the syntax for utilizing cookies within the `getServerSideProps` function in Next.js?

Question

What is the syntax for utilizing cookies within the `getServerSideProps` function in Next.js?

I am struggling to pass the current language to an endpoint. Despite attempting to retrieve the language from a Cookie, I keep getting undefined within the getServerSideProps function.

export async function getServerSideProps(context) {
    const lang = await Cookie.get('next-i18next')
    const res = await fetch(`endpoint/${lang}`)
    const data = await res.json()

    return {
        props: { data },
    }
}

export default Index;

Does anyone know how to properly access cookies within the getServerSideProps function?

javascript cookies next.js server-side-rendering

Answer 1

Answer №1

To retrieve the cookies in your Next.js application, access them through the req.headers object within the getServerSideProps method:

export async function getServerSideProps(context) {
  const cookies = context.req.headers.cookie;
  return {
    props: {},
  };
}

After retrieving the cookies, you can utilize the cookie npm package to parse and manipulate them:

import * as cookie from 'cookie'

export async function getServerSideProps(context) {
  const parsedCookies = cookie.parse(context.req.headers.cookie);
  return { props: {} }
}

Answer 2

To retrieve the cookies in your Next.js application, access them through the req.headers object within the getServerSideProps method:

export async function getServerSideProps(context) {
  const cookies = context.req.headers.cookie;
  return {
    props: {},
  };
}

After retrieving the cookies, you can utilize the cookie npm package to parse and manipulate them:

import * as cookie from 'cookie'

export async function getServerSideProps(context) {
  const parsedCookies = cookie.parse(context.req.headers.cookie);
  return { props: {} }
}

Answer 3

Answer №2

To simplify the process of extracting cookie information from context.req.headers.cookie, Next.js offers an alternative by providing cookies in the form of an object accessible through context.req.cookies.

export async function getServerSideProps(context) {
    const lang = context.req.cookies['next-i18next']
    
    // ...
    
}

Referencing the documentation on getServerSideProps:

The req object within the context passed to getServerSideProps includes built-in middleware for parsing the incoming request (req). This middleware consists of:

req.cookies - A structured representation of the cookies sent in the request. By default, this is set to {}

Answer 4

To simplify the process of extracting cookie information from context.req.headers.cookie, Next.js offers an alternative by providing cookies in the form of an object accessible through context.req.cookies.

export async function getServerSideProps(context) {
    const lang = context.req.cookies['next-i18next']
    
    // ...
    
}

Referencing the documentation on getServerSideProps:

The req object within the context passed to getServerSideProps includes built-in middleware for parsing the incoming request (req). This middleware consists of:

req.cookies - A structured representation of the cookies sent in the request. By default, this is set to {}

Answer 5

Answer №3

To retrieve cookies, you can utilize the parseCookies function along with the cookie package.

import cookie from "cookie"

function parseCookies(req){
    return cookie.parse(req ? req.headers.cookie || "" : document.cookie);
}

You can then access the cookies as shown below.

export async function getServerSideProps({ req} ) {
  const cookies = parseCookies(req);

  // Retrieve specific element from cookie using its name
  
  return { 
     props: {
        jwt: cookies.jwt,
     } 
  }
}

Answer 6

To retrieve cookies, you can utilize the parseCookies function along with the cookie package.

import cookie from "cookie"

function parseCookies(req){
    return cookie.parse(req ? req.headers.cookie || "" : document.cookie);
}

You can then access the cookies as shown below.

export async function getServerSideProps({ req} ) {
  const cookies = parseCookies(req);

  // Retrieve specific element from cookie using its name
  
  return { 
     props: {
        jwt: cookies.jwt,
     } 
  }
}

Answer 7

Answer №4

How have you been? Here's a simple way to achieve this:

export async function getServerSideProps(context) {
  console.log(context.req.cookies)
}

Such a straightforward and elegant solution!

Answer 8

How have you been? Here's a simple way to achieve this:

export async function getServerSideProps(context) {
  console.log(context.req.cookies)
}

Such a straightforward and elegant solution!

Answer 9

Answer №5

If you are working with Axios, implementing this is quite straightforward

This method can be utilized within the getServerSideProps. Accessing cookies using withCredentials is not possible in this case as it operates on the server-side.

const { token } = context.req.cookies;
  const response = await axios.get('/staff/single', {
    headers: { Cookie: `token=${token};` },
  });

Alternatively, you can try the following (works for client-side operations)

  const response = await axios.get('/staff/single', {
    headers: { withCredentials: true },
  });

Answer 10

If you are working with Axios, implementing this is quite straightforward

This method can be utilized within the getServerSideProps. Accessing cookies using withCredentials is not possible in this case as it operates on the server-side.

const { token } = context.req.cookies;
  const response = await axios.get('/staff/single', {
    headers: { Cookie: `token=${token};` },
  });

Alternatively, you can try the following (works for client-side operations)

  const response = await axios.get('/staff/single', {
    headers: { withCredentials: true },
  });

Answer 11

Answer №6

To retrieve the cookies from the context.res.getHeader('Set-Cookie') within the getServerSideProps function:

export const getServerSideProps: GetServerSideProps = async (context) => {
    
      const cookieStore: ReturnType<typeof context.res.getHeader> =
        context.res.getHeader('Set-Cookie');
    
      const cookieStoreParsed: { [key: string]: string } = Array.isArray(
        cookieStore
      )
        ? parseCookieValues(cookieStore)
        : {};

// Access specific value using cookieStoreParsed[SOME_COOKIE_NAME]
      console.log(cookieStoreParsed[SOME_COOKIE_NAME])
    
      return {
        props: {
          ...something you need
        },
      };
    };

Next, utilize the cookie npm package to interpret them:

import * as cookie from 'cookie'

const parseCookieValues = (cookieStore: string[]) =>
      cookieStore.reduce((acc: { [key: string]: string }, cookieElem: string) => {
        const parsedCookieElem = cookie.parse(cookieElem);
        return {
          ...acc,
          ...parsedCookieElem,
        };
      }, {});

Answer 12

To retrieve the cookies from the context.res.getHeader('Set-Cookie') within the getServerSideProps function:

export const getServerSideProps: GetServerSideProps = async (context) => {
    
      const cookieStore: ReturnType<typeof context.res.getHeader> =
        context.res.getHeader('Set-Cookie');
    
      const cookieStoreParsed: { [key: string]: string } = Array.isArray(
        cookieStore
      )
        ? parseCookieValues(cookieStore)
        : {};

// Access specific value using cookieStoreParsed[SOME_COOKIE_NAME]
      console.log(cookieStoreParsed[SOME_COOKIE_NAME])
    
      return {
        props: {
          ...something you need
        },
      };
    };

Next, utilize the cookie npm package to interpret them:

import * as cookie from 'cookie'

const parseCookieValues = (cookieStore: string[]) =>
      cookieStore.reduce((acc: { [key: string]: string }, cookieElem: string) => {
        const parsedCookieElem = cookie.parse(cookieElem);
        return {
          ...acc,
          ...parsedCookieElem,
        };
      }, {});

Answer 13

Answer №7

To incorporate the functionality of the 'cookie' package, follow these steps:

import cookie from 'cookie'

export async function getServerSideProps(context){
  const {token} = cookie.parse(context.req.headers.cookie || '')
  console.log(token)

  return{
    props:{
    }
  }
}

Answer 14

To incorporate the functionality of the 'cookie' package, follow these steps:

import cookie from 'cookie'

export async function getServerSideProps(context){
  const {token} = cookie.parse(context.req.headers.cookie || '')
  console.log(token)

  return{
    props:{
    }
  }
}

What is the syntax for utilizing cookies within the `getServerSideProps` function in Next.js?

Answer №1

Answer №2

Answer №3

Answer №4

Answer №5

Answer №6

Answer №7

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