echo/website/content/recipes/twitter.md

+++ title = "Twitter Like API Example" description = "Twitter Like API example for Echo" [menu.main] name = "Twitter" parent = "recipes" weight = 2 +++

This recipe shows how to create a Twitter like REST API using MongoDB (Database), JWT (API security) and JSON (Data exchange).

Models

user.go

{{< embed "twitter/model/user.go" >}}

post.go

{{< embed "twitter/model/post.go" >}}

Handlers

handler.go

{{< embed "twitter/handler/handler.go" >}}

user.go

{{< embed "twitter/handler/user.go" >}}

post.go

{{< embed "twitter/handler/post.go" >}}

API

Signup

User signup

• Retrieve user credentials from the body and validate against database.
• For invalid email or password, send 400 - Bad Request response.
• For valid email and password, save user in database and send 201 - Created response.

Request

curl \
  -X POST \
  http://localhost:1323/signup \
  -H "Content-Type: application/json" \
  -d '{"email":"jon@labstack.com","password":"shhh!"}'

Response

201 - Created

{
  "id": "58465b4ea6fe886d3215c6df",
  "email": "jon@labstack.com",
  "password": "shhh!"
}

Login

User login

• Retrieve user credentials from the body and validate against database.
• For invalid credentials, send 401 - Unauthorized response.
• For valid credentials, send 200 - OK response:
  • Generate JWT for the user and send it as response.
  • Each subsequent request must include JWT in the Authorization header.

Method: POST
Path: /login

Request

curl \
  -X POST \
  http://localhost:1323/login \
  -H "Content-Type: application/json" \
  -d '{"email":"jon@labstack.com","password":"shhh!"}'

Response

200 - OK

{
  "id": "58465b4ea6fe886d3215c6df",
  "email": "jon@labstack.com",
  "token": "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJleHAiOjE0ODEyNjUxMjgsImlkIjoiNTg0NjViNGVhNmZlODg2ZDMyMTVjNmRmIn0.1IsGGxko1qMCsKkJDQ1NfmrZ945XVC9uZpcvDnKwpL0"
}

Client should store the token, for browsers, you may use local storage.

Follow

Follow a user

• For invalid token, send 400 - Bad Request response.
• For valid token:
  • If user is not found, send 404 - Not Found response.
  • Add a follower to the specified user in the path parameter and send 200 - OK response.

Method: POST
Path: /follow/:id

Request

curl \
  -X POST \
  http://localhost:1323/follow/58465b4ea6fe886d3215c6df \
  -H "Authorization: Bearer eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJleHAiOjE0ODEyNjUxMjgsImlkIjoiNTg0NjViNGVhNmZlODg2ZDMyMTVjNmRmIn0.1IsGGxko1qMCsKkJDQ1NfmrZ945XVC9uZpcvDnKwpL0"

Response

200 - OK

Post

Post a message to specified user

• For invalid request payload, send 400 - Bad Request response.
• If user is not found, send 404 - Not Found response.
• Otherwise save post in the database and return it via 201 - Created response.

Method: POST
Path: /posts

Request

curl \
  -X POST \
  http://localhost:1323/posts \
  -H "Authorization: Bearer eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJleHAiOjE0ODEyNjUxMjgsImlkIjoiNTg0NjViNGVhNmZlODg2ZDMyMTVjNmRmIn0.1IsGGxko1qMCsKkJDQ1NfmrZ945XVC9uZpcvDnKwpL0" \
  -H "Content-Type: application/json" \
  -d '{"to":"58465b4ea6fe886d3215c6df","message":"hello"}'

Response

201 - Created

{
  "id": "584661b9a6fe8871a3804cba",
  "to": "58465b4ea6fe886d3215c6df",
  "from": "58465b4ea6fe886d3215c6df",
  "message": "hello"
}

Feed

List most recent messages based on optional page and limit query parameters

Method: GET
Path: /feed?page=1&limit=5

Request

curl \
  -X GET \
  http://localhost:1323/feed \
  -H "Authorization: Bearer eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJleHAiOjE0ODEyNjUxMjgsImlkIjoiNTg0NjViNGVhNmZlODg2ZDMyMTVjNmRmIn0.1IsGGxko1qMCsKkJDQ1NfmrZ945XVC9uZpcvDnKwpL0"

Response

200 - OK

[
  {
    "id": "584661b9a6fe8871a3804cba",
    "to": "58465b4ea6fe886d3215c6df",
    "from": "58465b4ea6fe886d3215c6df",
    "message": "hello"
  }
]

[Source Code]({{< source "twitter" >}})

Maintainers

• vishr