实现基于windows的多线程Web服务器端

代码来源于《TCP/IP网络编程》（尹圣雨著）第24章--制作HTTP服务器端。

纯C语言实现：

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <winsock2.h>
#include <process.h>

#define BUF_SIZE 2048
#define BUF_SMALL 100

unsigned WINAPI RequestHandler(void *arg);
char* ComtentType(char *file);
void SendData(SOCKET sock, char* ct, char* filename);
void SendErrorMSG(SOCKET sock);
void ErrorHandling(char *message);

int main(int argc, char *argv[])
{
    WSADATA wsaData;
    SOCKET hServSock,hClntSock;
    SOCKADDR_IN servAdr, clntAdr;

    HANDLE hThread;
    DWORD dwThreadID;
    int clntAdrSize;

    if(argc!=2){
        printf("Usage : %s< port >\n",argv[0]);
        exit(1);
    }

    if( WSAStartup( MAKEWORD(2,2), &wsaData )!=0 )
        ErrorHandling( "WSAStartup() error!" );

    hServSock=socket(PF_INET, SOCK_STREAM , 0);
    memset( &servAdr, 0 ,sizeof(servAdr) );

    servAdr.sin_family = AF_INET;
    servAdr.sin_addr.s_addr = htonl(INADDR_ANY);
    servAdr.sin_port = htons(atoi(argv[1]));

    if(bind(hServSock,(SOCKADDR *)&servAdr, sizeof(servAdr)) == SOCKET_ERROR)
        ErrorHandling( "bind() error!" );

    if(listen(hServSock,5)== SOCKET_ERROR)
        ErrorHandling( "listen() error!" );

    while(1)
    {
        clntAdrSize = sizeof( clntAdr );
        hClntSock = accept( hServSock,(SOCKADDR *)&clntAdr, &clntAdrSize );
        printf("Connection Request : %s:%d\n",inet_ntoa(clntAdr.sin_addr),ntohs(clntAdr.sin_port));
        hThread = (HANDLE)_beginthreadex(
                    NULL,0,RequestHandler,(void*)hClntSock,0,(unsigned *)&dwThreadID);
    }
    closesocket(hServSock);
    WSACleanup();
    return 0;
}

unsigned WINAPI RequestHandler(void *arg)
{
    SOCKET hClntSock= (SOCKET)arg;
    char buf[BUF_SIZE];
    char method[BUF_SMALL];
    char ct[BUF_SMALL];
    char filename[BUF_SMALL];

    recv(hClntSock,buf,BUF_SIZE,0);
    if(strstr(buf,"HTTP/")==NULL)
    {
        SendErrorMSG(hClntSock);
        closesocket(hClntSock);
        return 1;
    }

    strcpy(method,strtok(buf," /"));
    if( strcmp( method,"GET" ) )
        SendErrorMSG(hClntSock);

    strcpy( filename,strtok(NULL," /") );
    strcpy(ct,ComtentType(filename));
    SendData(hClntSock, ct, filename);
    return 0;
}

char* ComtentType(char *file)
{
   char extension[BUF_SMALL];
   char fileName[BUF_SMALL];
   strcpy(fileName,file);
   strtok(fileName,".");
   strcpy(extension,strtok(NULL,"."));
   if(!strcmp(extension,"html")|| !strcmp(extension,"htm"))
       return "text/html";
   else
       return "text/plain";

}

void SendData(SOCKET sock, char* ct, char* filename)
{
    char protocol[] = "HTTP/1.0 200 OK\r\n";
    char servName[] = "Server:simple web server\r\n";
    char cntLen[] = "Content-length:2048\r\n";
    char cntType[BUF_SIZE];
    char buf[BUF_SIZE];
    FILE * sendFile;

    sprintf(cntType,"Content-type:%s\r\n\r",ct);
    if((sendFile=fopen(filename,"r"))==NULL)
    {
        SendErrorMSG(sock);
        return;
    }

    send(sock, protocol, strlen(protocol),0);
    send(sock, servName, strlen(servName),0);
    send(sock, cntLen, strlen(cntLen),0);
    send(sock, cntType, strlen(cntType),0);

    while(fgets(buf,BUF_SIZE,sendFile)!=NULL)
        send(sock,buf,strlen(buf),0);

    closesocket(sock);
}

void SendErrorMSG(SOCKET sock)
{
    char protocol[] = "HTTP/1.0 400 Bad Request\r\n";
    char servName[] = "Server:simple web server\r\n";
    char cntLen[] = "Content-length:2048\r\n";
    char cntType[] = "Content-type:text/html\r\n\r";
    char content[] = "<html><head><title>NETWORK</title></head>"
                     "<body><font size=+5><br> 发生错误！"
                     "</font></body></html>";

    send(sock, protocol, strlen(protocol),0);
    send(sock, servName, strlen(servName),0);
    send(sock, cntLen, strlen(cntLen),0);
    send(sock, cntType, strlen(cntType),0);
    send(sock, content,strlen(content),0);
    closesocket(sock);

}
void ErrorHandling(char *message)
{
    fputs(message,stderr);
    fputc('\n',stderr);
    exit(1);
}

嗯，从书上敲了一遍，最后成功运行，还是碰到点问题。总结一下：

1.需要准备一个index.html的文件放在exe同路径下，index.html尽量简单，没有语法错误

2.运行该exe需要一个附带的参数--端口号。书中例子以9190为端口号

3.浏览器访问http://127.0.0.1:9190/index.html来验证效果

4.特备注意浏览器只能用IE浏览器。（我也不知道为什么其他浏览器访问不了，可能是安全性太低了，如果大佬知道，希望指教一下）

5.exe所在路径最好不要有中文，或者名字太长，或者有一些奇怪的符号，否则可能读不到html.index文件

再贴一下我自己写的index.html

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>点击那个按钮</title>
</head>
<head>
</head>
<body>
<button id="myBtn">点击一下就好了</button>
<script>
document.getElementById("myBtn").onclick=function(){successTouch()};
var movex; var movey;
var elem=document.getElementById("myBtn");
elem.style.width = "100px";
elem.style.height = "60px";
function changeBtnPos(){
    elem.style.position = "absolute";
    w=Math.random()*window.innerWidth-elem.offsetWidth;
    h=Math.random()*window.innerHeight-elem.offsetHeight;
    if (w<=0) {
        w=0;
    }
    if (h<=0) {
        h=0;
    }
    elem.style.left = w+"px";
    elem.style.top = h+"1px";
    
    if(Math.random()>0.5){
        document.getElementById("myBtn").innerHTML="点击不到吧";
    }else{
        document.getElementById("myBtn").innerHTML="点击呀";
    }
}
document.getElementById("myBtn").onmousemove = changeBtnPos
function whichButton(event)
{
    if(event.button==1)
    {
        document.getElementById("myBtn").onmousemove=function(){}
    }
}
function successTouch()
{
    alert("你成功了！");
    document.getElementById("myBtn").onmousemove = changeBtnPos
}
document.onmousedown=whichButton
</script>
</body>
</html>

实现基于windows的多线程Web服务器端

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