Simple HTTP Server

This project is a simple HTTP server written in C++. It handles basic HTTP requests including GET and POST methods and serves files from a specified directory. The server responds with appropriate HTTP status codes and can also echo messages back to the client.

Features

• Handles basic HTTP GET and POST requests.
• Serves files from a specified directory.
• Echoes messages back to the client.
• Responds with appropriate HTTP status codes (200 OK, 404 Not Found, 201 Created).
• Supports User-Agent inspection.
• Multi-threaded to handle multiple client connections simultaneously.

Requirements

• A C++ compiler that supports C++11 or later.
• POSIX-compliant operating system (e.g., Linux, macOS).

Usage

1. Compile the server:

   g++ -std=c++11 -pthread -o server main.cpp

2. Run the server:

   ./server --directory <path_to_directory>

   Replace <path_to_directory> with the path to the directory you want to serve files from.

Code Overview

Functions

• sockaddr_in setting_server_addr()

  • Configures and returns the server address structure.

• int server_setup(const int &server_fd, sockaddr_in &server_addr)

  • Binds the server to a port and starts listening for incoming connections.

• void cutting_connection()

  • Signals the end of a connection.

• int create_socket()

  • Creates and returns a server socket.

• void default_success_response(const int &client_fd)

  • Sends a default success (200 OK) response to the client.

• void default_fail_response(const int &client_fd)

  • Sends a default failure (404 Not Found) response to the client.

• void get_echo_response(const int &client_fd, const std::string &client_msg)

  • Handles GET requests to /echo/ by echoing back the message.

• std::string encoding_request(const std::string &client_msg, int start_encoding_index)

  • Parses and returns the encoding type from the client's request.

• void get_user_ag_response(const int &client_fd, const std::string &client_msg)

  • Handles GET requests to /user-agent by returning the client's User-Agent.

• void get_files_response(const int &client_fd, const std::string &client_msg)

  • Handles GET requests to /files/ by serving the requested file.

• void post_files_response(const int &client_fd, const std::string &client_msg)

  • Handles POST requests to /files/ by saving the uploaded file.

• void processing_user_request(const int &client_fd, const std::string &client_msg)

  • Processes the client's request and routes it to the appropriate handler.

• void handle_client(const int &client_fd)

  • Receives the client's message and processes the request.

Main Function

• Sets up the server socket.
• Binds to the port and starts listening.
• Accepts client connections and spawns threads to handle each client.