apps/c/httpserver/httpserver.c

/* Copyright (c) [2023] [Syswonder Community]
 *   [Ruxos] is licensed under Mulan PSL v2.
 *   You can use this software according to the terms and conditions of the Mulan PSL v2.
 *   You may obtain a copy of Mulan PSL v2 at:
 *               http://license.coscl.org.cn/MulanPSL2
 *   THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT, MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
 *   See the Mulan PSL v2 for more details.
 */


#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <arpa/inet.h>
#include <netinet/in.h>
#include <sys/socket.h>

const char header[] = "\
HTTP/1.1 200 OK\r\n\
Content-Type: text/html\r\n\
Content-Length: %u\r\n\
Connection: close\r\n\
\r\n\
";

const char content[] = "<html>\n\
<head>\n\
  <title>Hello, Ruxos</title>\n\
</head>\n\
<body>\n\
  <center>\n\
    <h1>Hello, <a href=\"https://github.com/syswonder/ruxos\">Ruxos</a></h1>\n\
  </center>\n\
  <hr>\n\
  <center>\n\
    <i>Powered by <a href=\"https://github.com/syswonder/ruxos/tree/main/apps/net/httpserver\">Ruxos example HTTP server</a> v0.1.0</i>\n\
  </center>\n\
</body>\n\
</html>\n\
";

int main()
{
    puts("Hello, Ruxos C HTTP server!");
    struct sockaddr_in local, remote;
    int addr_len = sizeof(remote);
    local.sin_family = AF_INET;
    if (inet_pton(AF_INET, "0.0.0.0", &(local.sin_addr)) != 1) {
        perror("inet_pton() error");
        return -1;
    }
    local.sin_port = htons(5555);
    int sock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
    if (sock == -1) {
        perror("socket() error");
        return -1;
    }
    if (bind(sock, (struct sockaddr *)&local, sizeof(local)) != 0) {
        perror("bind() error");
        return -1;
    }
    if (listen(sock, 0) != 0) {
        perror("listen() error");
        return -1;
    }
    puts("listen on: http://0.0.0.0:5555/");
    char buf[1024] = {};
    int client;
    char response[1024] = {};
    snprintf(response, 1024, header, strlen(content));
    strcat(response, content);
    for (;;) {
        client = accept(sock, (struct sockaddr *)&remote, (socklen_t *)&addr_len);
        if (client == -1) {
            perror("accept() error");
            return -1;
        }
        printf("new client %d\n", client);
        if (recv(client, buf, 1024, 0) == -1) {
            perror("recv() error");
            return -1;
        }
        ssize_t l = send(client, response, strlen(response), 0);
        if (l == -1) {
            perror("send() error");
            return -1;
        }
        if (close(client) == -1) {
            perror("close() error");
            return -1;
        }
        printf("client %d close: %ld bytes sent\n", client, l);
    }
    if (close(sock) == -1) {
        perror("close() error");
        return -1;
    }
    return 0;
}