2024-05-14 18:34:20 +07:00
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#include <stdio.h>
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2024-05-15 14:52:38 +07:00
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#include <string.h>
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2024-05-15 20:47:03 +07:00
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#include <errno.h>
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#include <arpa/inet.h>
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2024-05-14 18:34:20 +07:00
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#include <sys/socket.h>
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2024-05-15 14:52:38 +07:00
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#include <unistd.h>
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2024-05-14 18:34:20 +07:00
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2024-05-14 20:44:39 +07:00
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#define PORT 8080
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2024-05-15 14:52:38 +07:00
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#define BUFFER_SIZE 1024
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2024-05-14 20:44:39 +07:00
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2024-05-14 18:34:20 +07:00
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int main() {
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2024-05-15 14:52:38 +07:00
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char buffer[BUFFER_SIZE];
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2024-05-15 15:59:13 +07:00
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char resp[] = "HTTP/1.0 200 OK\r\n"
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2024-05-15 14:52:38 +07:00
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"Server: webserver-c\r\n"
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"Content-type: text/html\r\n\r\n"
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"<html>hello, world</html>\r\n";
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// create a socket
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2024-05-14 18:34:20 +07:00
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int sockfd = socket(AF_INET, SOCK_STREAM, 0);
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2024-05-15 14:52:38 +07:00
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if (sockfd == -1) {
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2024-05-15 15:59:13 +07:00
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perror("webserver (socket)");
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2024-05-14 18:34:20 +07:00
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return 1;
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}
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printf("socket created successfully\n");
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2024-05-15 14:52:38 +07:00
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// create the address to bind the socket to
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2024-05-14 20:44:39 +07:00
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struct sockaddr_in host_addr;
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int host_addrlen = sizeof(host_addr);
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host_addr.sin_family = AF_INET;
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host_addr.sin_port = htons(PORT);
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host_addr.sin_addr.s_addr = htonl(INADDR_ANY);
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2024-05-15 15:59:13 +07:00
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// create client address
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struct sockaddr_in client_addr;
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int client_addrlen = sizeof(client_addr);
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2024-05-15 14:52:38 +07:00
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// Bind the socket to the address
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2024-05-15 15:59:13 +07:00
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if (bind(sockfd, (struct sockaddr *) &host_addr, host_addrlen) != 0) {
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2024-05-14 20:44:39 +07:00
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perror("webserver (bind)");
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return 1;
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}
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printf("socket successfully bound to address\n");
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2024-05-15 14:52:38 +07:00
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// listen to incoming connections
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if (listen(sockfd, SOMAXCONN) != 0) {
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perror("webserver (listen)");
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return 1;
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}
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printf("server listening for connections\n");
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for (;;) {
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// accept incoming connections
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int newsockfd = accept(sockfd, (struct sockaddr *) &host_addr, (socklen_t *) &host_addrlen);
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2024-05-15 14:52:38 +07:00
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if (newsockfd < 0) {
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perror("webserver (accept)");
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continue;
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}
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printf("connection accepted\n");
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2024-05-15 15:59:13 +07:00
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// get client address
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int sockn = getsockname(newsockfd, (struct sockaddr *) &client_addr, (socklen_t *) &client_addrlen);
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if(sockn < 0) {
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perror("webserver (getsockname)");
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continue;
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}
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2024-05-15 14:52:38 +07:00
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// read from the socket
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int valread = read(newsockfd, buffer, BUFFER_SIZE);
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if (valread < 0) {
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perror("webserver (read)");
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continue;
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}
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2024-05-15 15:59:13 +07:00
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// read the request
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char method[BUFFER_SIZE], uri[BUFFER_SIZE], version[BUFFER_SIZE];
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sscanf(buffer, "%s %s %s", method, uri, version);
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printf("[%s:%u] %s %s %s\n", inet_ntoa(client_addr.sin_addr), ntohs(client_addr.sin_port), method, version, uri);
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2024-05-15 20:47:03 +07:00
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// check if request is GET request
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if (strncmp("GET", method, 7) != 0) {
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const char resp[] = "HTTP/1.0 400 Bad Request\r\n"
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"Server: webserver-c\r\n"
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"Content-type: text/html\r\n\r\n";
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write(newsockfd, resp, strlen(resp));
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} else {
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// TO DO: IMPLEMENT FILE READING
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}
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2024-05-15 14:52:38 +07:00
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// write to the socket
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int valwrite = write(newsockfd, resp, strlen(resp));
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if (valwrite < 0) {
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perror("webserver (write)");
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continue;
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}
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close(newsockfd);
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}
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2024-05-14 20:44:39 +07:00
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2024-05-14 18:34:20 +07:00
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return 0;
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}
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