使用Code::blocks在windows下写网络程序

作者

He YiJun – storysnail<at>hotmail.com

版权

转载请保留本声明!

本文档包含的原创代码根据General Public License,v3 发布
GPLv3 许可证的副本可以在这里获得:http://www.gnu.org/licenses/gpl.html

本文档根据GNU
Free Documentation License 1.3发布
GFDL1.3许可证的副本可以在这里获得:http://www.gnu.org/licenses/gfdl.html

文中所引用的软件版权详见各软件版权具体声明，文中所提及的所有商标均为各自商标所有人的财产。
作者在此向所有提供过帮助和支持的朋友表示感谢，此致!

更新

2014-11-10

修改版权,增加linux版示例程序

本文已经停止更新，网络开发请参阅msys2开发环境配置

前言:

这是一个用来读取指定网页内容的程序。当前还非常原始，但已经能完成基本的功能。未来我会在这个程序的基础上不断扩充，让这个程序变成一个可用的更新检测程序！

一：windows下用Code::blocks开发网络程序

1:
Code::blocks 中新建一个工程
2:
建完工程后点击Project菜单，选择Build
options...
3:
选择Linker
settings标签页，在Other
linker options:中添加：

-lwsock32

使用Code::blocks在windows下写网络程序

二源代码

/***********************************************************************
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ *
Eabc-version-verfy.c
Develop Team : ls
Team Leader : He YiJun (storysnail<at>gmail.com)
Main Programmer : He YiJun
Programmer : Ling Ying
Program comments : Ling Ying
Dict Editor : Yang QiuXi
Documents : Ling Ying、 Yang QiuXi
Art Designer : He YiJun
License : GPLv3
Last Update : 2013-02-25
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ *
*************************************************************************/
#include <windows.h> // 新增 windows.h
#include <winsock2.h>
//#pragma comment(lib, "ws2_32.lib") // For VS
#include <tchar.h>
#include <stdio.h>
#include <stdlib.h>
#include <malloc.h>
#include <io.h>
#ifdef _MT
#include <process.h>
#endif
/* DWORD_PTR (pointer precision unsigned integer) is used for integers
* that are converted to handles or pointers
* This eliminates Win64 warnings regarding conversion between
* 32 and 64-bit data, as HANDLEs and pointers are 64 bits in
* Win64 (See Chapter 16). This is enable only if _Wp64 is defined.
*/
#if !defined(_Wp64)
#define DWORD_PTR DWORD
#define LONG_PTR LONG
#define INT_PTR INT
#endif
#define MAX_RQRS_LEN 0x1000 //4096
/* Required for sockets */
#define SERVER_PORT 80
typedef struct {
LONG32 rsLen;
BYTE record [MAX_RQRS_LEN];
} RESPONSE;
typedef struct {
LONG32 rqLen;
BYTE record [MAX_RQRS_LEN];
} REQUEST;
#define RQ_SIZE sizeof (REQUEST)
#define RQ_HEADER_LEN RQ_SIZE-MAX_RQRS_LEN
#define RS_SIZE sizeof (RESPONSE)
#define RS_HEADER_LEN RS_SIZE-MAX_RQRS_LEN
static BOOL SendRequest (REQUEST *, SOCKET);
static BOOL ReceiveResponse (RESPONSE *, SOCKET);
static VOID PrintError (LPCTSTR , DWORD , BOOL);
struct sockaddr_in clientSAddr;
int _tmain (int argc, LPSTR argv[])
{
SOCKET clientSock = INVALID_SOCKET;
REQUEST request;
RESPONSE response;
WSADATA WSStartData; /* Socket library data structure */
DWORD conVal;
while (1) {
_tprintf (_T("%s"), _T("\nEnter Command: "));
_fgetts ((char *)request.record, MAX_RQRS_LEN-1, stdin);
/* Get rid of the new line at the end */
/* Messages use 8-bit characters */
request.record[strlen((char *)request.record)-1] = '\0';
if (strcmp ((char *)request.record, "$Quit") == 0)
break;
if (strncmp ((char *)request.record, "GET",3) == 0)
request.record[strlen((char *)request.record)] = '\n';
/* Initialize the WS library. Ver 2.2 */
if (WSAStartup (MAKEWORD (2, 2), &WSStartData) != 0)
PrintError (_T("Cannot support sockets"), 1, TRUE);
/* Connect to the server */
/* Follow the standard client socket/connect sequence */
clientSock = socket(AF_INET, SOCK_STREAM, 0);
if (clientSock == INVALID_SOCKET)
PrintError (_T("Failed client socket() call"), 2, TRUE);
memset (&clientSAddr, 0, sizeof(clientSAddr));
clientSAddr.sin_family = AF_INET;
//clientSAddr.sin_addr.s_addr = htonl(inet_addr ("121.127.248.96"));
clientSAddr.sin_addr.s_addr = inet_addr ("121.127.248.96");
clientSAddr.sin_port = htons(SERVER_PORT);
conVal = connect (clientSock, (struct sockaddr *)&clientSAddr, sizeof(clientSAddr));
if (conVal == SOCKET_ERROR) PrintError (_T("Failed client connect() call)"), 3, TRUE);
SendRequest (&request, clientSock);
ReceiveResponse (&response, clientSock);
shutdown (clientSock, SD_BOTH); /* Disallow sends and receives */
closesocket (clientSock);
WSACleanup();
close (clientSock);
}
_tprintf (_T("\n****Leaving client\n"));
return 0;
}
// GET http://www.7fane.com/test.html
BOOL SendRequest (REQUEST *pRequest, SOCKET sd)
{
/* Send the the request to the server on socket sd */
BOOL disconnect = FALSE;
LONG32 nRemainSend, nXfer;
LPBYTE pBuffer;
//char target[]="GET http://www.7fane.com/test.html\n";
pRequest->rqLen = (DWORD)(strlen ((char *)pRequest->record) + 1);
nRemainSend = pRequest->rqLen;
pBuffer = (LPBYTE)pRequest->record;
_tprintf (_T("%s%s"), _T("\nNow SendRequestMessage: "),pBuffer);
while (nRemainSend > 0 && !disconnect) {
nXfer = send (sd, (char *)pBuffer, nRemainSend, 0);
//nXfer = send (sd, target, strlen(target), 0);
if (nXfer == SOCKET_ERROR) PrintError (_T("client send() failed"), 5, TRUE);
disconnect = (nXfer == 0);
nRemainSend -=nXfer;
pBuffer += nXfer;
_tprintf (_T("%s%d"), _T("\nSend btyes: "),nXfer);
//_tprintf (_T("%s%s"), _T("\nSend content: "),target);
_tprintf (_T("%s%s"), _T("\nSend content: "),pRequest->record);
}
return disconnect;
}
BOOL ReceiveResponse (RESPONSE *pResponse, SOCKET sd)
{
BOOL disconnect = FALSE;
LONG32 nRemainRecv, nXfer;
LPBYTE pBuffer;
_tprintf (_T("%s"), _T("\nNow ReceiveResponseMessage! "));
while(!disconnect) {
/* Read each response and send it to std out.*/
memset (pResponse->record, 0, MAX_RQRS_LEN);
nRemainRecv = MAX_RQRS_LEN;
pBuffer = (LPBYTE)pResponse->record;
while (nRemainRecv > 0 && !disconnect) {
nXfer = recv (sd, (char *)pBuffer, nRemainRecv, 0);
if (nXfer == SOCKET_ERROR) PrintError (_T("client response recv() failed"), 7, TRUE);
disconnect = (nXfer == 0);
nRemainRecv -=nXfer;
pBuffer += nXfer;
if(!disconnect) {
_tprintf (_T("%s[%d]"), _T("\nReceive bytes: "),nXfer);
_tprintf (_T("%s\n%s"), _T("\nReceive content: "),pResponse->record);
}
}
}
return disconnect;
}
VOID PrintError (LPCTSTR userMessage, DWORD exitCode, BOOL printErrorMessage)
{
DWORD eMsgLen, errNum = GetLastError ();
LPTSTR lpvSysMsg;
_ftprintf (stderr, _T("%s\n"), userMessage);
if (printErrorMessage) {
eMsgLen = FormatMessage (FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM,
NULL, errNum, MAKELANGID (LANG_NEUTRAL, SUBLANG_DEFAULT),
(LPTSTR) &lpvSysMsg, 0, NULL);
if (eMsgLen > 0)
{
_ftprintf (stderr, _T("%s\n"), lpvSysMsg);
}
else
{
_ftprintf (stderr, _T("Last Error Number; %d.\n"), (int)errNum);
}
if (lpvSysMsg != NULL) LocalFree (lpvSysMsg); /* Explained in Chapter 5. */
}
if (exitCode > 0)
ExitProcess (exitCode);
return;
}

三运行截图

程序开始运行

使用Code::blocks在windows下写网络程序

输入命令和网址

注意下面截图的网址是我和泠在很久以前建的网站地址，目前已经失效了，所以你应该用一个有效的网址替换！

使用Code::blocks在windows下写网络程序

程序得到的网页内容

使用Code::blocks在windows下写网络程序

退出程序

使用Code::blocks在windows下写网络程序

下面是该程序的linux版本,这段程序是《使用C4droid和botbrew在andriod手机上编程》这篇文章的两个示例程序之一,不过《使用C4droid和botbrew在andriod手机上编程》这篇文章现在已经放弃维护了！

 /********************************************************************************

 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ *

     get-www

                                main.c

     Develop Team     :    ls

     Main Programmer  :    He YiJun  (storysnail<at>gmail.com)

     License          :    GPLv3

     Last Update      :    2013-03-03

 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ *

 *********************************************************************************/

 #include <stdlib.h>

 #include <stdio.h>

 #include <string.h>

 #include <stdarg.h>

 #include <sys/socket.h>

 #include <netinet/in.h>

 #include <netdb.h>

 static int gw_connect(char *domain,int port)

 {

   int sock_sd;

   int i;

   struct hostent *site_dns;

   struct sockaddr_in s_addr;

   site_dns = gethostbyname(domain);

   if(site_dns == NULL) {

     printf("gethostbyname error!\n");

     return -;

   }

   printf("default ip:  %s\n",inet_ntoa(*((struct in_addr *)site_dns->h_addr)));

   for(i=; i< site_dns->h_length/sizeof(int); i++) {

     printf("IP:%d:%s\n",i+,inet_ntoa(*((struct in_addr *)site_dns->h_addr_list[i])));

   }

   sock_sd = socket(AF_INET,SOCK_STREAM,);

   if(sock_sd < ) {

     printf ("socket error!");

     return -;

   }

   memset(&s_addr,,sizeof(struct sockaddr_in));

   memcpy(&s_addr.sin_addr,site_dns ->h_addr_list[],site_dns->h_length);

   s_addr.sin_family = AF_INET;

   s_addr.sin_port = htons(port);

   printf("s_addr ip:  %s",inet_ntoa(*((struct in_addr *)&s_addr.sin_addr)));

   return (connect(sock_sd,(struct sockaddr *)&s_addr,sizeof(struct sockaddr))  <  ? - : sock_sd);

 }

 static int gw_send(int sock_sd,char *fmt,...)

 {

   char buf [];

   va_list argptr;

   va_start(argptr,fmt);

   vsprintf(buf,fmt,argptr);

   va_end(argptr);

   printf("Send:\n%s\n",buf);

   return send(sock_sd,buf,strlen(buf),);

 }

 void main(int argc,char **argv)

 {

   int sock_sd;

   char rBuf[];

   sock_sd = gw_connect("www.7fane.com",);

   if(sock_sd < )  {

     printf("connect error!\n");

     return;

   }

   //注意：该网站只用于个人测试，在2013年11月末到期，

   //如果你在之后的日期使用，请使用其它网页地址

   gw_send(sock_sd,"GET http://www.7fane.com/test.html\n");

   gw_send(sock_sd,"%c",);

   while(read(sock_sd,rBuf,) > )

     printf("%c",rBuf[]);

   close(sock_sd);

   return;

 }

秒客网

使用Code::blocks在windows下写网络程序

一：windows下用Code::blocks开发网络程序

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