RSS Feed Aggregator

A RESTful web API that periodically fetches, stores and displays posts from multiple RSS feeds for multiple users.

Contents

• Technology Stack
  
• Getting Started
  
  • Prerequisites
    
  • Environment Variables
    
  • Building and Running The Application
    
• API Endpoints
  
  • /v1/users
    
  • /v1/feeds
    
  • /v1/feed_follows
    
  • /v1/posts
    
  • /v1/readiness
• Demonstration

Technology Stack

• Programming Language: Golang v1.22 - For developing a robust and efficient web server.
• Database: PostgreSQL - For a production ready relational database.
• Migration Tool: Goose - For automated database schema migrations.
• Type-Safe SQL Access: SQLC - For generating Go packages that provide type-safe access to our database.

The stack is chosen to support robustness and scalability, providing a solid foundation for any future enhancements and maintenance efforts.

Getting Started

Prerequisites

Ensure you have Go v1.22+ installed on your system.

Environment Variables

Create a .env file in your project root directory with the following environment variables:

PORT=<Your Port Number>
DB_URL=<Postgres Database URL>

If you're using a local Postgres database, ensure you append your database url with ?sslmode=disable.

Building and Running the Application

From the project's root directory, use the Go command-line tool to build the executable:

go build -o rssagg

This command generates an executable named rssagg, which starts the web API server on the specified port.

Execute the binary and start the server on your port:

./rssagg

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API Endpoints

• /v1/users
  
• /v1/feeds
  
• /v1/feed_follows
  
• /v1/posts
  
• /v1/readiness

/v1/users

POST http://localhost:<Port>/v1/users

Creates a new user database entry and returns it.

• Headers: None
• Request Body:

{
  "name": "<User Name>"
}

• Response Body:

{
  "id": "<User ID>",
  "created_at": "<Timestamp>",
  "updated_at": "<Timestamp>",
  "name": "<User Name>",
  "apikey": "<API Key>"
}

GET http://localhost:<Port>/v1/users

Returns a user's database entry.

• Headers: Requires authentication header:

Authentication: APIKey <API Key>

• Request Body: None
• Response Body:

{
  "id": "<User ID>",
  "created_at": "<Timestamp>",
  "updated_at": "<Timestamp>",
  "name": "<User Name>",
  "apikey": "<API Key>"
}

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/v1/feeds

POST http://localhost:<Port>/v1/feeds

Creates a new RSS feed database entry and returns it. Additionally creates an RSS feed follow database entry for the user that submits the RSS feed and returns it.

• Headers: Requires authentication header:

Authentication: ApiKey <API Key>

• Request Body:

{
  "name": "<RSS Feed Name>",
  "url": "<RSS Feed Url>"
}

• Response Body:

{
  "feed": {
    "id": "<RSS Feed ID>",
    "created_at": "<Timestamp>",
    "updated_at": "<Timestamp>",
    "name": "<RSS Feed Name>",
    "url": "<RSS Feed Url>",
    "user_id": "<User ID>",
    "last_fetched_at": "<Timestamp>"
  },
  "feed_follow": {
    "id": "<RSS Feed Follow ID>",
    "created_at": "<Timestamp>",
    "updated_at": "<Timestamp>",
    "user_id": "<User ID>",
    "feed_id": "<RSS Feed ID>"
  }
}

GET http://localhost:<Port>/v1/feeds

Returns a list of all RSS feed database entries.

• Headers: None
• Request Body: None
• Response Body:

[
  {
    "id": "<RSS Feed ID>",
    "created_at": "<Timestamp>",
    "updated_at": "<Timestamp>",
    "name": "<RSS Feed Name>",
    "url": "<RSS Feed Url>",
    "user_id": "<User ID>",
    "last_fetched_at": "<Timestamp>"
  }
]

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/v1/feed_follows

POST http://localhost:<Port>/v1/feed_follows

Creates an RSS feed follow database entry for a specific user and returns it.

• Headers: Requires authentication header:

Authentication: ApiKey <API Key>

• Request Body:

{
  "feed_id": "<RSS Feed ID>"
}

• Response Body:

{
  "id": "<RSS Feed Follow ID>",
  "created_at": "<Timestamp>",
  "updated_at": "<Timestamp>",
  "user_id": "<User ID>",
  "feed_id": "<RSS Feed ID>"
}

GET http://localhost:<Port>/v1/feed_follows

Returns a list of all RSS feed follow database entries for a specific user.

• Headers: Requires authentication header:

Authentication: ApiKey <API Key>

• Request Body: None
• Response Body:

[
  {
    "id": "<RSS Feed Follow ID>",
    "created_at": "<Timestamp>",
    "updated_at": "<Timestamp>",
    "user_id": "<User ID>",
    "feed_id": "<RSS Feed ID>"
  }
]

DELETE http://localhost:<Port>/v1/feed_follows/{RSS Feed Follow ID}

Deletes an RSS feed follow database entry for a specific user.

• Headers: Requires authentication header:

Authentication: APIKey <API Key>

• Request Body: None
• Response Body: None

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/v1/posts

GET http://localhost:<Port>/v1/posts

Returns a list of the latest RSS feed post database entries for a specific user.
Defaults to latest 5 posts. Use optional query parameter limit to return a custom number of posts. For example: http://localhost:8080/v1/posts?limit=10

• Headers: Requires authentication header:

Authentication: ApiKey <API Key>

• Request Body: None
• Response Body:

[
  {
    "id": "<RSS Feed Post ID>",
    "created_at": "<Timestamp>",
    "updated_at": "<Timestamp>",
    "title": "<RSS Feed Post Title>",
    "url": "<RSS Feed Post URL>",
    "description": "<RSS Feed Post Description>",
    "published_at": "<Timestamp>",
    "feed_id": "<RSS Feed ID>"
  }
]

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/v1/readiness

GET http://localhost:<Port>/v1/readiness

Returns status of the web server.

• Headers: None
• Request Body: None
• Response Body:

{
  "status": "ok"
}

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Demonstration

Example of /v1/posts response:

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