holyc/simple_web_server.c at main · SafeAF/holyc · GitHub

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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <arpa/inet.h>

#define PORT 8081
#define BUFFER_SIZE 1024

int main() {
    int server_fd, new_socket;
    struct sockaddr_in address;
    int addrlen = sizeof(address);

    // Creating socket file descriptor
    if ((server_fd = socket(AF_INET, SOCK_STREAM, 0)) == 0) {
        perror("socket failed");
        exit(EXIT_FAILURE);
    }

    // Forcefully attaching socket to the port 8080
    address.sin_family = AF_INET;
    address.sin_addr.s_addr = INADDR_ANY;
    address.sin_port = htons(PORT);

    // Binding the socket to the address
    if (bind(server_fd, (struct sockaddr *)&address, sizeof(address)) < 0) {
        perror("bind failed");
        exit(EXIT_FAILURE);
    }

    // Start listening for incoming connections
    if (listen(server_fd, 3) < 0) {
        perror("listen");
        exit(EXIT_FAILURE);
    }

    printf("Server is listening on port %d...\n", PORT);

    while (1) {
        printf("Waiting for a connection...\n");

        // Accept a new connection
        if ((new_socket = accept(server_fd, (struct sockaddr *)&address, (socklen_t*)&addrlen)) < 0) {
            perror("accept");
            exit(EXIT_FAILURE);
        }

        // Read the HTTP request
        char buffer[BUFFER_SIZE] = {0};
        read(new_socket, buffer, BUFFER_SIZE);
        printf("Received request:\n%s\n", buffer);

        // Simple HTTP response
        char *response = "HTTP/1.1 200 OK\r\n"
                         "Content-Type: text/html\r\n"
                         "Content-Length: 47\r\n"
                         "\r\n"
                         "<html><body><h1>Hello, World!</h1></body></html>";

        // Send the HTTP response
        write(new_socket, response, strlen(response));
        printf("Response sent\n");

        // Close the connection
        close(new_socket);
    }

    return 0;
}