Windows下C++实现WEB服务器

/topic/368943自己研究了好几天终于写出来一个，哈哈，当然也从网上得到了很多的帮助拉。

谢谢大家咯！这个版本还不是很完善，但Web服务器的基本框架已经出来了，还有部分的功能需要进行进一步的测试和修改。

虽然说C的开发比较慢，对于程序员来说比较难以操作，但通过用C写这些很底层的东西，可以更好的了解的象java的socket中的工作原理。

有一定的帮助！以下是源代码：#include <winsock.h>#include <sys/stat.h>#include <iostream>using namespace std;#define SERVER_PORT 10000 //自定义的服务端口#define HOSTLEN 256 //主机名长度#define BACKLOG 10 //同时等待的连接个数int sendall(int s, char *buf, int *len) {int total = 0; // 已经发送字节数int bytesleft = *len; //还剩余多少字节int n;while(total < *len) {n = send(s, buf+total, bytesleft, 0);if (n == -1) { break; }total += n;bytesleft -= n;}*len = total; // 返回实际发送出去的字节数return n==-1?-1:0; // 成功发送返回0 失败-1}void wrong_req(int sock) {char* error_head = "HTTP/1.0 501 Not Implemented\r\n"; //输出501错误 int len = strlen(error_head);if (sendall(sock, error_head, &len) == -1) { //向客户发送printf("Sending failed!");return;}char* error_type = "Content-type: text/plain\r\n";len = strlen(error_type);if (sendall(sock, error_type, &len) == -1) {printf("Sending failed!");return;}char* error_end = "\r\n";len = strlen(error_end);if (sendall(sock, error_end, &len) == -1) {printf("Sending failed!");return;}char* prompt_info = "The command is not yet completed\r\n";len = strlen(prompt_info);if (sendall(sock, prompt_info, &len) == -1) {printf("Sending failed!");return;}}bool not_exit(char* arguments) {struct stat dir_info;return (stat(arguments, &dir_info) == -1);}void file_not_found(char* arguments, int sock) {char* error_head = "HTTP/1.0 404 Not Found\r\n"; //构造404错误head int len = strlen(error_head);if (sendall(sock, error_head, &len) == -1) { //向客户端发送printf("Sending error!");return;}char* error_type = "Content-type: text/plain\r\n";len = strlen(error_type);if (sendall(sock, error_type, &len) == -1) {printf("Sending error!");return;}char* error_end = "\r\n";len = strlen(error_end);if (sendall(sock, error_end, &len) == -1) {printf("Sending error!");return;}char prompt_info[50] = "Not found: ";strcat(prompt_info, arguments);len = strlen(prompt_info);if (sendall(sock, prompt_info, &len) == -1) { //输出未找到的文件printf("Sending error!");return;}}void send_header(int send_to, char* content_type) {char* head = "HTTP/1.0 200 OK\r\n"; //正确的头部信息int len = strlen(head);if (sendall(send_to, head, &len) == -1) { //向连接的客户端发送数据 printf("Sending error");return;}if (content_type) { //content_type不为空char temp_1[30] = "Content-type: "; //准备好要连接的字串strcat(temp_1, content_type); //构造content_typestrcat(temp_1, "\r\n");len = strlen(temp_1);if (sendall(send_to, temp_1, &len) == -1) {printf("Sending error!");return;}}}char* file_type(char* arg) {char * temp; //临时字符串指针if ((temp=strrchr(arg,'.')) != NULL) { //取得后缀return temp+1;}return ""; //如果请求的文件名中没有. 则返回空串}void send_file(char* arguments, int sock) {char* extension = file_type(arguments); //获得文件后缀名char* content_type = "text/plain"; //初始化type='text/plain'FILE* read_from; //本地文件指针从该文件中读取.html .jpg等int readed = -1; //每次读得的字节数if (strcmp(extension, "html") == 0) { //发送内容为htmlcontent_type = "text/html";}if (strcmp(extension, "gif") == 0) { //发送内容为gifcontent_type = "image/gif";}if (strcmp(extension, "jpg") == 0) { //发送内容为jpgcontent_type = "image/jpg";}read_from = fopen(arguments, "r"); //打开用户指定的文件准备读取 if(read_from != NULL) { //指针不为空char read_buf[128]; //读文件时的字节缓存数组send_header(sock, content_type); //发送协议头send(sock, "\r\n", 2, 0); //再加一个"\r\n" 不能缺少格式要求while(!feof(read_from)) { //判断文件是否已经结束fgets(read_buf, 128, read_from); //读取int len = strlen(read_buf);if (sendall(sock, read_buf, &len) == -1) { //发送数据printf("Sending error!"); //出现发送错误显示到控制台继续发送 continue;}}}}void handle_req(char* request, int client_sock) {char command[BUFSIZ]; //保存解析到的命令字段 GET PUTchar arguments[BUFSIZ]; //保存解析到的请求的文件strcpy(arguments, "./"); //注意该符号在不同操作系统的区别if (sscanf(request, "%s%s", command, arguments+2) != 2) {return; //解析出错在返回}printf("handle_cmd: %s\n",command); //向控制台输出此时的命令 printf("handle_path: %s\n",arguments); //向控制台输出此时的请求路径if (strcmp(command, "GET") != 0) { //请求命令格式是否正确wrong_req(client_sock);return;}if (not_exit(arguments)) { //请求的文件是否存在file_not_found(arguments, client_sock);return;}send_file(arguments, client_sock); //命令格式及请求路径正确则发送数据return;}int make_server_socket() {struct sockaddr_in server_addr; //服务器地址结构体int tempSockId; //临时存储socket描述符tempSockId = socket(PF_INET, SOCK_STREAM, 0);if (tempSockId == -1) { //如果返回值为－1 则出错return -1;}server_addr.sin_family = AF_INET;server_addr.sin_port = htons(SERVER_PORT);server_addr.sin_addr.s_addr = inet_addr("127.0.0.1"); //本地地址memset(&(server_addr.sin_zero), '\0', 8);if (bind(tempSockId, (struct sockaddr *)&server_addr,sizeof(server_addr)) == -1) { //绑定服务如果出错则返回－1printf("bind error!\n");return -1;}if (listen(tempSockId, BACKLOG) == -1 ) { //开始监听printf("listen error!\n");return -1;}return tempSockId; //返回取得的SOCKET}void main(int argc, char * argv[]) {WSADATA wsaData;if (WSAStartup(MAKEWORD(1, 1), &wsaData) != 0) {fprintf(stderr, "WSAStartup failed.\n");exit(1);}printf("My web server started...\n");int server_socket; //服务器的socketint acc_socket; //接收到的用户连接的socketint sock_size = sizeof(struct sockaddr_in);struct sockaddr_in user_socket; //客户连接信息server_socket = make_server_socket(); //创建服务器端的socketif (server_socket == -1) { //创建socket出错printf("Server exception!\n");exit(2);}while(true) {acc_socket = accept(server_socket, (struct sockaddr *)&user_socket, &sock_size); //接收连接//cout << inet_ntoa(user_socket.sin_addr) << endl; //测试用:-)//int numbytes;char buf[100];if ((numbytes=recv(acc_socket, buf, 99, 0)) == -1) {perror("recv");exit(1);}//printf("buf ... %s", buf); //测试用handle_req(buf, acc_socket);}}和我的上一篇文章是一起写的，呵呵，大家给提点意见啊。