Multi-Threaded HTTP Server

Overview

This is a Multi-threaded HTTP server that can serve multiple clients simultaneously. It handles GET and PUT requests and creates an audit log that identifies the linearization of the server.

Design Decisions

• Used a thread pool to handle incoming requests, with a fixed number of threads (4).
• Implemented a global queue to store incoming requests and synchronize access to it using a mutex.
• Used POSIX file locks to handle file I/O and avoid race conditions.
• Implemented an audit log to track incoming requests and their responses.

Functions

• handle_connection(int connfd): Handles a new incoming connection by parsing the request, handling it, and sending the appropriate response.
• handle_get(conn_t *conn): Handles GET requests by getting the URI, opening the file, and sending the file content as a response.
• handle_put(conn_t *conn): Handles PUT requests by getting the URI, opening the file, and writing the content sent in the request to the file.
• handle_unsupported(conn_t *conn, const Request_t *req): Handles unsupported requests by sending a NOT IMPLEMENTED response.
• audit_log(const char *method, conn_t *conn, const Response_t *res): Logs incoming requests and their responses to stderr
• *worker(): Worker thread function that retrieves requests from the global queue and handles them.

Data Structures

• queue_t: Queue implemented using a circular buffer
• conn_t: A struct that represents a connection, containing the file descriptor, request, and response.
• Request_t: An enum that represents the different types of requests (GET, PUT, etc.).
• Response_t: An enum that represents the different types of responses

Modules

• asgn2_helper_funcs.h: Contains helper functions for handling HTTP requests and responses.
• connection.h: Defines the conn_t struct and functions for handling connections.
• debug.h: Contains debugging macros for logging.
• queue.h: Defines the queue_t struct and functions for handling the global queue.
• request.h: Defines the Request_t enum and functions for handling HTTP requests.
• response.h: Defines the Response_t enum and functions for handling HTTP responses.

Citations

• Vince Tan
• Professor Andrew Quinn