Question

我正在尝试通过制作一个非常简单的http网络服务器来学习C语言中的winsock。目前我可以提供单个网页。我想基于浏览器中的url实现一个文件系统。如何获取客户端请求的URL？

   // socketprogramming4.cpp : Defines the entry point for the console application.
//

#include "stdafx.h"
#include <io.h>
#include <stdio.h>
#include <stdlib.h>
#include <dos.h>
#include <winsock2.h>

#pragma comment(lib,"ws2_32.lib") //Winsock Library

bool send_all(int socket, void *buffer, size_t length)
{
    char *ptr = (char*)buffer;
    while (length > 0)
    {
        int i = send(socket, ptr, length, 0);
        if (i < 1) return false;
        ptr += i;
        length -= i;
    }
    shutdown(socket, 1);

    return true;
}


int main(int argc, char *argv[])
{
    WSADATA wsa;
    SOCKET s, new_socket;
    struct sockaddr_in server, client;
    int c;
    char *message, server_reply[2000];
    int recv_size;

    printf("\nInitialising Winsock...");
    if (WSAStartup(MAKEWORD(2, 2), &wsa) != 0)
    {
        printf("Failed. Error Code : %d", WSAGetLastError());
        return 1;
    }

    printf("Initialised.\n");
    //Create a socket

    if ((s = socket(AF_INET, SOCK_STREAM, 0)) == INVALID_SOCKET)
    {
        printf("Could not create socket : %d", WSAGetLastError());
    }

    printf("Socket created.\n");

    //Prepare the sockaddr_in structure
    server.sin_family = AF_INET;
    server.sin_addr.s_addr = INADDR_ANY;
    server.sin_port = htons(80);

    //Bind
    if (bind(s, (struct sockaddr *)&server, sizeof(server)) == SOCKET_ERROR)
    {
        printf("Bind failed with error code : %d", WSAGetLastError());
        exit(EXIT_FAILURE);
    }

    puts("Bind done");

    //Listen to incoming connections
    listen(s, 3);

    //Accept and incoming connection
    puts("Waiting for incoming connections...");

    c = sizeof(struct sockaddr_in);

    while ((new_socket = accept(s, (struct sockaddr *)&client, &c)) != INVALID_SOCKET)
    {
        message = "<!DOCTYPE html><html><head><link rel='stylesheet' href='index.css' /></head><body>Testing</body></html>";
        send_all(new_socket, message, strlen(message));
    }

    if (new_socket == INVALID_SOCKET)
    {
        printf("accept failed with error code : %d", WSAGetLastError());
        return 1;
    }

    closesocket(s);
    WSACleanup();
    return 0;
}

C winsock客户端浏览器URL

0 个答案: