httpserver C实现
折腾的有点累，传输层用TCP解简单的http协议，然后实现了两个假的按钮233，这个是在别人的基础上完成的–>地址，
下面是源码：
// HTTP1.1 与 1.0不同，默认是持续连接的(keep-alive)
#include <Winsock2.h>
#include <stdio.h>
#include <string.h>
_CRTIMP char* __cdecl __MINGW_NOTHROW _getcwd (char*, int);
#define BACKLOG 10
#define DEFAULT_PORT 8080
#define BUF_LENGTH 1024
#define MIN_BUF 128
#define _MAX_PATH MAX_PATH
#define USER_ERROR -1
#define SERVER "Server: Server\r\n"
char recv_buf[BUF_LENGTH];
char method[MIN_BUF];
char url[MIN_BUF];
char path[_MAX_PATH];
void ProcessRequst(SOCKET sAccept);
int file_not_found(SOCKET sAccept);
int file_ok(SOCKET sAccept, long flen);
int send_file(SOCKET sAccept, FILE *resource);
int send_not_found(SOCKET sAccept);
const char *FileNotFoundPage=
"<html>"
"<head><title>404 not found</title><link rel='icon' href='http://oygwu7lhj.bkt.clouddn.com/favicon.ico' type='image/x-ico' /> </head>"
"<body bgcolor=\"#FFFFCC\"><br><br><center>"
"<span style=\"font-size:50px;color:CC9999\">对方给你发送了一个404，并向你扔了一只小明</span>"
"<br><br><br>"
"<img src=\"http://oygwu7lhj.bkt.clouddn.com/dog.JPEG\" alt=\"dog\">"
"</center></body>"
"</html>"
;
const char *DefaultPage=
"<html>"
"<head><title>Default</title><link rel='icon' href='http://oygwu7lhj.bkt.clouddn.com/favicon.ico' type='image/x-ico' /> </head>"
"<body bgcolor=\"#70000\"><br><br><br><br><br><br><br>"
"<center><span style=\"font-size:50px;color:A0A0A0;font-family:century\">你是小明吗</span><hr></center>"
"<br>"
"<table width=100% height=10%><tr><td><center>"
"<a href=\"yes\"><button type=\"button\" style=\"height:30px;width:100px;\">yes</button></a>"
"&nbsp&nbsp&nbsp&nbsp"
"<a href=\"no\"><button type=\"button\" style=\"height:30px;width:100px;\">no</button></a>"
"</center></td></tr></table>"
"</body>"
"</html>"
;
const char *ConfirmPage=
"<html>"
"<head><title>Default</title><link rel='icon' href='http://oygwu7lhj.bkt.clouddn.com/favicon.ico' type='image/x-ico' /> </head>"
"<body bgcolor=\"#FFFFCC\"><center>"
"<span style=\"font-size:30px;color:000000;font-family:century\">恭喜你发现一只认真学习的小明</span>"
"<br>"
"<img src=\"http://oygwu7lhj.bkt.clouddn.com/ql.jpg\" alt=\"ql\">"
"</center></body>"
"</html>"
;
void ProcessRequst(SOCKET sAccept)
{
int i, j;
//example:GET /su?wd=ww&action=opensearch&ie=UTF-8 HTTP/1.1\r\n
//处理接收数据
i = 0; j = 0;
// 取出第一个单词，一般为HEAD、GET、POST
while (!(' ' == recv_buf[j]) && (i < sizeof(method) - 1))
{
method[i] = recv_buf[j];
i++; j++;
}
method[i] = '\0'; // 结束符，这里也是初学者很容易忽视的地方
printf("method: %s\n", method);
// 如果不是GET或HEAD方法，则直接断开本次连接
// 如果想做的规范些可以返回浏览器一个501未实现的报头和页面
if (stricmp(method, "GET") && stricmp(method, "HEAD"))//比较，相等返回0
{
printf("not get or head method.\n");
printf("***********************\n\n\n\n");
return;
}
// 提取出第二个单词(url文件路径，空格结束)，并把'/'改为windows下的路径分隔符'\'
// 这里只考虑静态请求(比如url中出现'?'表示非静态，需要调用CGI脚本，'?'后面的字符串表示参数，多个参数用'+'隔开
i = 0;
while ((' ' == recv_buf[j]) && (j < sizeof(recv_buf)))
j++;
while (!(' ' == recv_buf[j]) && (i < sizeof(recv_buf) - 1) && (j < sizeof(recv_buf)))
{
if (recv_buf[j] == '/')
url[i] = '\\';
else
url[i] = recv_buf[j];
i++; j++;
}
url[i] = '\0';
printf("url: %s\n",url);
if(1==strlen(url))//默认请求
{
printf("send default page\n");
file_ok(sAccept, strlen(DefaultPage));
send(sAccept, DefaultPage, strlen(DefaultPage), 0);
printf("***********************\n\n\n\n");
return;
}
else if(0 == stricmp(url, "\\yes"))//假按钮处理
{
printf("send confirm page\n");
file_ok(sAccept, strlen(ConfirmPage));
send(sAccept, ConfirmPage, strlen(ConfirmPage), 0);
printf("***********************\n\n\n\n");
return;
}
// 将请求的url路径转换为本地路径
_getcwd(path,_MAX_PATH);//获取当前工作路径
strcat(path,url);//将两字符串连接
printf("path: %s\n",path);
// 打开本地路径下的文件，网络传输中用r文本方式打开会出错
FILE *resource = fopen(path,"rb");
// 没有该文件则发送一个简单的404-file not found的html页面，并断开本次连接
if(resource==NULL)
{
file_not_found(sAccept);
// 如果method是GET，则发送自定义的file not found页面
if(0 == stricmp(method, "GET"))
send_not_found(sAccept);
printf("file not found.\n");
printf("***********************\n\n\n\n");
return;
}
/*
SEEK_SET 档案开头
SEEK_CUR 文件指针的当前位置
SEEK_END 文件结尾*
*/
// 求出文件长度，记得重置文件指针到文件头
fseek(resource,0,SEEK_END);
long flen=ftell(resource);//返回当前文件读写位置
printf("file length: %ld\n", flen);
fseek(resource,0,SEEK_SET);
// 发送200 OK HEAD
file_ok(sAccept, flen);
// 如果是GET方法则发送请求的资源
if(0 == stricmp(method, "GET"))
{
if(0 == send_file(sAccept, resource))
printf("file send ok.\n");
else
printf("file send fail.\n");
}
printf("***********************\n\n\n\n");
return;
}
// 发送200 ok报头
int file_ok(SOCKET sAccept, long flen)
{
char send_buf[MIN_BUF];
// time_t timep;
// time(&timep);
sprintf(send_buf, "HTTP/1.1 200 OK\r\n");
send(sAccept, send_buf, strlen(send_buf), 0);
sprintf(send_buf, "Connection: keep-alive\r\n");
send(sAccept, send_buf, strlen(send_buf), 0);
// sprintf(send_buf, "Date: %s\r\n", ctime(&timep));
// send(sAccept, send_buf, strlen(send_buf), 0);
sprintf(send_buf, SERVER);
send(sAccept, send_buf, strlen(send_buf), 0);
sprintf(send_buf, "Content-Length: %ld\r\n", flen);
send(sAccept, send_buf, strlen(send_buf), 0);
sprintf(send_buf, "Content-Type: text/html\r\n");
send(sAccept, send_buf, strlen(send_buf), 0);
sprintf(send_buf, "\r\n");
send(sAccept, send_buf, strlen(send_buf), 0);
return 0;
}
// 发送404 file_not_found报头
int file_not_found(SOCKET sAccept)
{
char send_buf[MIN_BUF];
// time_t timep;
// time(&timep);
sprintf(send_buf, "HTTP/1.1 404 NOT FOUND\r\n");
send(sAccept, send_buf, strlen(send_buf), 0);
// sprintf(send_buf, "Date: %s\r\n", ctime(&timep));
// send(sAccept, send_buf, strlen(send_buf), 0);
sprintf(send_buf, "Connection: keep-alive\r\n");
send(sAccept, send_buf, strlen(send_buf), 0);
sprintf(send_buf, SERVER);
send(sAccept, send_buf, strlen(send_buf), 0);
sprintf(send_buf, "Content-Type: text/html\r\n");
send(sAccept, send_buf, strlen(send_buf), 0);
sprintf(send_buf, "\r\n");
send(sAccept, send_buf, strlen(send_buf), 0);
return 0;
}
// 发送自定义的file_not_found页面
int send_not_found(SOCKET sAccept)
{
send(sAccept, FileNotFoundPage, strlen(FileNotFoundPage), 0);
return 0;
}
// 发送请求的资源
int send_file(SOCKET sAccept, FILE *resource)
{
char send_buf[BUF_LENGTH];
while (1)
{
memset(send_buf,0,sizeof(send_buf)); //缓存清0
fgets(send_buf, sizeof(send_buf), resource);
// printf("send_buf: %s\n",send_buf);
if (SOCKET_ERROR == send(sAccept, send_buf, strlen(send_buf), 0))
{
printf("send() Failed:%d\n",WSAGetLastError());
return USER_ERROR;
}
if(feof(resource))
return 0;
}
}
int main()
{
WSADATA wsaData;
SOCKET sListen,sAccept; //服务器监听套接字，连接套接字
int serverport=DEFAULT_PORT; //服务器端口号
struct sockaddr_in ser,cli; //服务器地址，客户端地址
int iLen;
int iResult;
printf("-----------------------\n");
printf("Server waiting\n");
printf("-----------------------\n");
//第一步：加载协议栈
if (WSAStartup(MAKEWORD(2,2),&wsaData) !=0)
{
printf("Failed to load Winsock.\n");
return USER_ERROR;
}
//第二步：创建监听套接字，用于监听客户请求
sListen =socket(AF_INET,SOCK_STREAM,0);
if (sListen == INVALID_SOCKET)
{
printf("socket() Failed:%d\n",WSAGetLastError());
return USER_ERROR;
}
//创建服务器地址：IP+端口号
ser.sin_family=AF_INET;
ser.sin_port=htons(serverport); //服务器端口号
ser.sin_addr.s_addr=htonl(INADDR_ANY); //服务器IP地址，默认使用本机IP
memset(&(ser.sin_zero), 0, 8);
//第三步：绑定监听套接字和服务器地址
if (bind(sListen,(LPSOCKADDR)&ser,sizeof(ser))==SOCKET_ERROR)
{
printf("blind() Failed:%d\n",WSAGetLastError());
return USER_ERROR;
}
//第五步：通过监听套接字进行监听
if (listen(sListen,BACKLOG)==SOCKET_ERROR)
{
printf("listen() Failed:%d\n",WSAGetLastError());
return USER_ERROR;
}
//第六步：接受客户端的连接请求，返回与该客户建立的连接套接字
iLen=sizeof(cli);
while (1) //循环等待客户的请求
{
sAccept=accept(sListen,(struct sockaddr*)&cli,&iLen);
if (sAccept==INVALID_SOCKET)
{
printf("accept() Failed:%d\n",WSAGetLastError());
break;
}
printf( "Client IP：%s \n", inet_ntoa(cli.sin_addr));
printf( "Client PORT：%d \n", ntohs(cli.sin_port));
while(1)
{
memset(recv_buf,0,sizeof(recv_buf));
printf("wait to rec...\n");
if ((iResult=recv(sAccept,recv_buf,sizeof(recv_buf),0))<0) //接收错误
{
printf("recv() Failed:%d\n",WSAGetLastError());
printf("***********************\n\n\n\n");
closesocket(sAccept);
break;
}
else if(iResult==0)
{
printf("connection has been closed!\n");
printf("***********************\n\n\n\n");
printf("waiting for next connection!\n");
break;
}
else
{
printf("recv data from client:%s\n",recv_buf); //接收成功，打印请求报文
ProcessRequst(sAccept);
}
}
}
closesocket(sListen);
WSACleanup();
return 0;
}
还有就是我之前一直遇到10054错误。。。最后查出来是因为我一时手痒设置的网页小图标的问题。。。因为当时给的地址是本地，发往客户端之后，客户端会来GET，结果GET之后就是奇葩错误了。。。10054是中间见到，有的时候是客户端不关网页这边就不显示接收的数据。。。。