GO GraphQL - Hackernews demo

GOlang GraphQL training from HowToGraphQL.com

Following the tutorial from How To GraphQL for GO

Usage

MySQL

MySQL is provided with a docker-compose.yaml file on the repository root. Start the DB with the following command:

docker-compose up -d

Service

Navigate to cmd/server and start he server

cd cmd/server
go run main-go

Then navigate to http://localhost:8080/ to open the GraphQL playground.

Use the GraphQL Server

Create User

Request

mutation {
    createUser(input: {username: "user1", password: "123"})
}

Response

{
  "data": {
    "createUser": "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJleHAiOjE2ODAwMDI0NDMsInVzZXJuYW1lIjoiam9obiJ9.SyjeM8lzdIpM5HS6l68tR0yb744gXoSdSrhKCAHRlNo"
  }
}

The createUser response contains a JWT token, that should be used in the Authorization header like this:

{
  "Authorization": "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJleHAiOjE2ODAwMDI0NDMsInVzZXJuYW1lIjoiam9obiJ9.SyjeM8lzdIpM5HS6l68tR0yb744gXoSdSrhKCAHRlNo"
}

Login User

Request

mutation {
    login(input: {username: "user1", password: "123"})
}

Response

{
  "data": {
    "login": "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJleHAiOjE2ODAwMTA1NjIsInVzZXJuYW1lIjoidXNlcjEifQ.9cNmB5Nzyj5-rH6YcOXOt6wzw8QmEsNAJxGnViDcK9E"
  }
}

This response holds the new JWT token to be used in the Authorization header.

Refresh User Token

Request

mutation {
    refreshToken(input: {token: "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJleHAiOjE2ODAwMTA1NjIsInVzZXJuYW1lIjoidXNlcjEifQ.9cNmB5Nzyj5-rH6YcOXOt6wzw8QmEsNAJxGnViDcK9E"})
}

Response

{
  "data": {
    "refreshToken": "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJleHAiOjE2ODAwMTA2ODksInVzZXJuYW1lIjoidXNlcjEifQ.9IULnunhHm9lwoo03Qri4SFMDJGC7HyjHH_gOpaDPNE"
  }
}

This response holds the new JWT token to be used in the Authorization header.

Create Links

Request

mutation {
  createLink(input: {title: "real link!", address: "www.graphql.org"}){
    title
    address
    user{
      name
    }
  }
}

Response

{
  "data": {
    "createLink": {
      "title": "real link!",
      "address": "www.graphql.org",
      "user": {
        "name": "user1"
      }
    }
  }
}

If you do not have a valid token, then you will get an Access Denied error

Get Links

Request

query {
  links {
    title
    address
  }
}

Response

{
  "data": {
    "links": [
      {
        "title": "real link!",
        "address": "www.graphql.org"
      }
    ]
  }
}