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HttpServer

This is a simple HTTP server I built for learning purposes — to get familiar with socket programming in Java and how HTTP servers work in general. It allows clients to make GET and POST requests to two hosts, which are configurable via environment variables.

Prerequisites

  • Java 21 (Maven wrapper included)

Environment Variables

Name Description
PORT_NUMBER Port number the server will bind to
BACKLOG_NUMBER Max number of queued incoming connections
HOST1_NAME First virtual host name
HOST2_NAME Second virtual host name
FILE_PATH Absolute path to a file where user information (from POST) will be stored

Routes

Host 1 (HOST1_NAME)

GET /

Returns a simple main page in HTML format.

POST /user

  • Accepts a JSON request body with: name, surname, and status.
  • Appends the user information to the file specified by the FILE_PATH environment variable.

Host 2 (HOST2_NAME)

GET /random

Returns an HTML page containing a randomly generated number.

Features

  • The server uses basic routing based on Host, Method, and Path.
  • All responses are manually constructed HTTP/1.1 messages using Java sockets.