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Sample APIs are created using NodeJS, ExpressJS , SQLite where the user can perform various operations on the database like GET(read) , POST(create) , PUT(update) and delete. These APIS can retrieve various queries using path parameters and query parameters.

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Covid-19 India Portal

Given two files app.js and a database file covid19IndiaPortal.db consisting of three tables state, district and user.

Write APIs to perform operations on the tables state, district only after authentication of the user.

The columns of the tables are given below,

State Table

Columns Type
state_id INTEGER
state_name TEXT
population INTEGER

District Table

Columns Type
district_id INTEGER
district_name TEXT
state_id INTEGER
cases INTEGER
cured INTEGER
active INTEGER
deaths INTEGER

You can use your previous code if required.

Sample Valid User Credentials

{
  "username": "christopher_phillips",
  "password": "christy@123"
}

API 1

Path: /login/

Method: POST

Request

{
  "username": "christopher_phillips",
  "password": "christy@123"
}
  • Scenario 1

    • Description:

      If an unregistered user tries to login

    • Response

      • Status code
        400
        
      • Body
        Invalid user
        
  • Scenario 2

    • Description:

      If the user provides an incorrect password

    • Response

      • Status code
        400
        
      • Body
        Invalid password
        
  • Scenario 3

    • Description:

      Successful login of the user

    • Response

      Return the JWT Token

      {
        "jwtToken": "ak2284ns8Di32......"
      }
      

Authentication with Token

  • Scenario 1

    • Description:

      If the token is not provided by the user or an invalid token

    • Response

      • Status code
        401
        
      • Body
        Invalid JWT Token
        
  • Scenario 2 After successful verification of token proceed to next middleware or handler

API 2

Path: /states/

Method: GET

Description:

Returns a list of all states in the state table

Response

[
  {
    "stateId": 1,
    "stateName": "Andaman and Nicobar Islands",
    "population": 380581
  },

  ...
]

API 3

Path: /states/:stateId/

Method: GET

Description:

Returns a state based on the state ID

Response

{
  "stateId": 8,
  "stateName": "Delhi",
  "population": 16787941
}

API 4

Path: /districts/

Method: POST

Description:

Create a district in the district table, district_id is auto-incremented

Request

{
  "districtName": "Bagalkot",
  "stateId": 3,
  "cases": 2323,
  "cured": 2000,
  "active": 315,
  "deaths": 8
}

Response

District Successfully Added

API 5

Path: /districts/:districtId/

Method: GET

Description:

Returns a district based on the district ID

Response

{
  "districtId": 322,
  "districtName": "Palakkad",
  "stateId": 17,
  "cases": 61558,
  "cured": 59276,
  "active": 2095,
  "deaths": 177
}

API 6

Path: /districts/:districtId/

Method: DELETE

Description:

Deletes a district from the district table based on the district ID

Response

District Removed

API 7

Path: /districts/:districtId/

Method: PUT

Description:

Updates the details of a specific district based on the district ID

Request

{
  "districtName": "Nadia",
  "stateId": 3,
  "cases": 9628,
  "cured": 6524,
  "active": 3000,
  "deaths": 104
}

Response


District Details Updated

API 8

Path: /states/:stateId/stats/

Method: GET

Description:

Returns the statistics of total cases, cured, active, deaths of a specific state based on state ID

Response

{
  "totalCases": 724355,
  "totalCured": 615324,
  "totalActive": 99254,
  "totalDeaths": 9777
}


Use npm install to install the packages.

Export the express instance using the default export syntax.

Use Common JS module syntax.

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Sample APIs are created using NodeJS, ExpressJS , SQLite where the user can perform various operations on the database like GET(read) , POST(create) , PUT(update) and delete. These APIS can retrieve various queries using path parameters and query parameters.

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