基于C语言编写一个简单的Web服务器

int server_socket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);

​​​​​​​if (0 > server_socket) {
    printf("[服务器] 创建socket对象失败,服务器启动失败...\n");
    return -1;
}
printf("[服务器] 创建socket成功....\n");

struct sockaddr_in my_addr;
bzero(&my_addr, sizeof(my_addr));
my_addr.sin_family = AF_INET;
my_addr.sin_port = htons(PORT);
my_addr.sin_addr.s_addr = htonl(INADDR_ANY);


int bind_ret = bind(server_socket, (struct  sockaddr*) &my_addr, sizeof(my_addr));

if (0 > bind_ret) {
    printf("[服务器]绑定端口%d失败,服务器启动失败\n", PORT);
    return -2;
}
printf("[服务器] 绑定端口:%d成功....\n", PORT);

int listen_ret = listen(server_socket, BACK_LOG);
if (0 > listen_ret) {
    printf("监听端口:%d失败，服务器运行失败....\n", PORT);
    return -3;
}
printf("[服务器] 监听端口:%d成功....\n", PORT);

struct sockaddr_in accept_in;
socklen_t socklen = sizeof(accept_in);
int accept_socket = accept(server_socket, (struct sockaddr *) &accept_in, &socklen);

if (-1 == accept_socket) {
    printf("[服务器] 接收请求失败，建立连接失败... \n");
    return -4;
}
printf("[服务器] 建立连接成功....\n");

char buffer[BUFFER_SIZE];
memset(buffer, 0, sizeof(buffer));
ssize_t data = recv(accept_socket, buffer, sizeof(buffer), RECV_FLAG);


if (data == 0) {
    printf("[服务器] 超时或对端主动关闭...\n");
    break;
}
if (0 > data) {
    printf("[服务器] 接收数据失败...\n");
    break;
}

printf("[服务器] 与客户端建立连接成功...\n");

char req[100];
memset(req, 0, sizeof(req));

get_method_req(req_buffer, req);
url_decode(req);
printf("[服务器] 来自客户端的请求==>%s\n", req);

char req[100];
memset(req, 0, sizeof(req));

void get_method_req(char *req_buff, char *req);
void get_method_req(char *req_buff, char *req) {
    int count = 0;
    for (int i = 6; i < strlen(buffer); i++) {
        if (buffer[i] == ' ') {
            break;
        }
        res[count++] = buffer[i];
    }
    res[count] = '\0';
}

int hex2dec(char c);
void url_decode(char url[]);

int hex2dec(char c) {
    if ('0' <= c && c <= '9') {
        return c - '0';
    } else if ('a' <= c && c <= 'f') {
        return c - 'a' + 10;
    } else if ('A' <= c && c <= 'F') {
        return c - 'A' + 10;
    } else {
        return -1;
    }
}

void url_decode(char url[]) {
    int i = 0;
    int len = strlen(url);
    int res_len = 0;
    char res[100];
    for (i = 0; i < len; ++i) {
        char c = url[i];
        if (c != '%') {
            res[res_len++] = c;
        } else {
            char c1 = url[++i];
            char c0 = url[++i];
            int num = 0;
            num = hex2dec(c1) * 16 + hex2dec(c0);
            res[res_len++] = num;
        }
    }
    res[res_len] = '\0';
    strcpy(url, res);
}

netstat -aon|findstr 9999

taskkill /f /t /im 10200