使用Code::blocks在windows下写网络程序

使用Code::blocks在windows下写网络程序

作者	HeYiJun – storysnailgmail.com
团队	ls
版权	转载请保留本声明! 本文档包含的原创代码根据GeneralPublic 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GNUFree 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 略... ...

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Buildoptions...
3:
选择Linkersettings标签页，在Otherlinker options:中添加：

-lwsock32

二 源代码

点击(此处)折叠或打开

1. /***********************************************************************
   
2. * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ *
   
3.                                Eabc-version-verfy.c
   
4. 
   
5.     Develop Team : ls
   
6.     Team Leader : He YiJun (storysnail<at>gmail.com)
   
7.     Main Programmer : He YiJun
   
8.     Programmer : Ling Ying
   
9.     Program comments : Ling Ying
   
10.     Dict Editor : Yang QiuXi
    
11.     Documents : Ling Ying、 Yang QiuXi
    
12.     Art Designer : He YiJun
    
13.     License : GPLv3
    
14.     Last Update : 2013-02-25
    
15. * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ *
    
16. *************************************************************************/
    
17. #include <windows.h> // 新增 windows.h
    
18. #include <winsock2.h>
    
19. //#pragma comment(lib, "ws2_32.lib") // For VS
    
20. #include <tchar.h>
    
21. #include <stdio.h>
    
22. #include <stdlib.h>
    
23. #include <malloc.h>
    
24. #include <io.h>
    
25. #ifdef _MT
    
26. #include <process.h>
    
27. #endif
    
28. /* DWORD_PTR (pointer precision unsigned integer) is used for integers
    
29.  * that are converted to handles or pointers
    
30.  * This eliminates Win64 warnings regarding conversion between
    
31.  * 32 and 64-bit data, as HANDLEs and pointers are 64 bits in
    
32.  * Win64 (See Chapter 16). This is enable only if _Wp64 is defined.
    
33.  */
    
34. #if !defined(_Wp64)
    
35. #define DWORD_PTR DWORD
    
36. #define LONG_PTR LONG
    
37. #define INT_PTR INT
    
38. #endif
    
39. 
    
40. #define MAX_RQRS_LEN 0x1000 //4096
    
41. 
    
42. /* Required for sockets */
    
43. #define SERVER_PORT 80
    
44. 
    
45. typedef struct {
    
46.   LONG32 rsLen;
    
47.   BYTE record [MAX_RQRS_LEN];
    
48. } RESPONSE;
    
49. 
    
50. typedef struct {
    
51.   LONG32 rqLen;
    
52.   BYTE record [MAX_RQRS_LEN];
    
53. } REQUEST;
    
54. 
    
55. #define RQ_SIZE sizeof (REQUEST)
    
56. #define RQ_HEADER_LEN RQ_SIZE-MAX_RQRS_LEN
    
57. #define RS_SIZE sizeof (RESPONSE)
    
58. #define RS_HEADER_LEN RS_SIZE-MAX_RQRS_LEN
    
59. 
    
60. static BOOL SendRequest (REQUEST *, SOCKET);
    
61. static BOOL ReceiveResponse (RESPONSE *, SOCKET);
    
62. static VOID PrintError (LPCTSTR , DWORD , BOOL);
    
63. 
    
64. struct sockaddr_in clientSAddr;
    
65. 
    
66. int _tmain (int argc, LPSTR argv[])
    
67. {
    
68.   SOCKET clientSock = INVALID_SOCKET;
    
69.   REQUEST request;
    
70.   RESPONSE response;
    
71.   WSADATA WSStartData; /* Socket library data structure */
    
72.   DWORD conVal;
    
73. 
    
74.   while (1) {
    
75.     _tprintf (_T("%s"), _T("\nEnter Command: "));
    
76.     _fgetts ((char *)request.record, MAX_RQRS_LEN-1, stdin);
    
77.     /* Get rid of the new line at the end */
    
78.     /* Messages use 8-bit characters */
    
79.     request.record[strlen((char *)request.record)-1] = '\0';
    
80. 
    
81.     if (strcmp ((char *)request.record, "$Quit") == 0)
    
82.       break;
    
83. 
    
84.     if (strncmp ((char *)request.record, "GET",3) == 0)
    
85.       request.record[strlen((char *)request.record)] = '\n';
    
86. 
    
87.     /* Initialize the WS library. Ver 2.2 */
    
88.     if (WSAStartup (MAKEWORD (2, 2), &WSStartData) != 0)
    
89.       PrintError (_T("Cannot support sockets"), 1, TRUE);
    
90. 
    
91.     /* Connect to the server */
    
92.     /* Follow the standard client socket/connect sequence */
    
93.     clientSock = socket(AF_INET, SOCK_STREAM, 0);
    
94.     if (clientSock == INVALID_SOCKET)
    
95.       PrintError (_T("Failed client socket() call"), 2, TRUE);
    
96. 
    
97.     memset (&clientSAddr, 0, sizeof(clientSAddr));
    
98.     clientSAddr.sin_family = AF_INET;
    
99.     //clientSAddr.sin_addr.s_addr = htonl(inet_addr ("121.127.248.96"));
    
100.     clientSAddr.sin_addr.s_addr = inet_addr ("121.127.248.96");
     
101.     clientSAddr.sin_port = htons(SERVER_PORT);
     
102. 
     
103.     conVal = connect (clientSock, (struct sockaddr *)&clientSAddr, sizeof(clientSAddr));
     
104.     if (conVal == SOCKET_ERROR) PrintError (_T("Failed client connect() call)"), 3, TRUE);
     
105. 
     
106.     SendRequest (&request, clientSock);
     
107. 
     
108.     ReceiveResponse (&response, clientSock);
     
109. 
     
110.     shutdown (clientSock, SD_BOTH); /* Disallow sends and receives */
     
111. 
     
112.     closesocket (clientSock);
     
113.     WSACleanup();
     
114. 
     
115.     close (clientSock);
     
116.   }
     
117. 
     
118.   _tprintf (_T("\n****Leaving client\n"));
     
119.   return 0;
     
120. }
     
121. 
     
122. // GET http://www.7fane.com/test.html
     
123. BOOL SendRequest (REQUEST *pRequest, SOCKET sd)
     
124. {
     
125.   /* Send the the request to the server on socket sd */
     
126.   BOOL disconnect = FALSE;
     
127.   LONG32 nRemainSend, nXfer;
     
128.   LPBYTE pBuffer;
     
129.   //char target[]="GET http://www.7fane.com/test.html\n";
     
130. 
     
131.   pRequest->rqLen = (DWORD)(strlen ((char *)pRequest->record) + 1);
     
132.   nRemainSend = pRequest->rqLen;
     
133.   pBuffer = (LPBYTE)pRequest->record;
     
134.   _tprintf (_T("%s%s"), _T("\nNow SendRequestMessage: "),pBuffer);
     
135.   while (nRemainSend > 0 && !disconnect) {
     
136.     nXfer = send (sd, (char *)pBuffer, nRemainSend, 0);
     
137.     //nXfer = send (sd, target, strlen(target), 0);
     
138.     if (nXfer == SOCKET_ERROR) PrintError (_T("client send() failed"), 5, TRUE);
     
139.     disconnect = (nXfer == 0);
     
140.     nRemainSend -=nXfer;
     
141.     pBuffer += nXfer;
     
142. 
     
143.     _tprintf (_T("%s%d"), _T("\nSend btyes: "),nXfer);
     
144.     //_tprintf (_T("%s%s"), _T("\nSend content: "),target);
     
145.     _tprintf (_T("%s%s"), _T("\nSend content: "),pRequest->record);
     
146.   }
     
147.   return disconnect;
     
148. }
     
149. 
     
150. BOOL ReceiveResponse (RESPONSE *pResponse, SOCKET sd)
     
151. {
     
152.   BOOL disconnect = FALSE;
     
153.   LONG32 nRemainRecv, nXfer;
     
154.   LPBYTE pBuffer;
     
155. 
     
156.   _tprintf (_T("%s"), _T("\nNow ReceiveResponseMessage! "));
     
157.   while(!disconnect) {
     
158.     /* Read each response and send it to std out.*/
     
159.     memset (pResponse->record, 0, MAX_RQRS_LEN);
     
160.     nRemainRecv = MAX_RQRS_LEN;
     
161.     pBuffer = (LPBYTE)pResponse->record;
     
162.     while (nRemainRecv > 0 && !disconnect) {
     
163.       nXfer = recv (sd, (char *)pBuffer, nRemainRecv, 0);
     
164.       if (nXfer == SOCKET_ERROR) PrintError (_T("client response recv() failed"), 7, TRUE);
     
165.       disconnect = (nXfer == 0);
     
166.       nRemainRecv -=nXfer;
     
167.       pBuffer += nXfer;
     
168. 
     
169.       if(!disconnect) {
     
170.         _tprintf (_T("%s[%d]"), _T("\nReceive bytes: "),nXfer);
     
171.         _tprintf (_T("%s\n%s"), _T("\nReceive content: "),pResponse->record);
     
172.       }
     
173.     }
     
174.   }
     
175.   return disconnect;
     
176. }
     
177. 
     
178. VOID PrintError (LPCTSTR userMessage, DWORD exitCode, BOOL printErrorMessage)
     
179. {
     
180.   DWORD eMsgLen, errNum = GetLastError ();
     
181.   LPTSTR lpvSysMsg;
     
182.   _ftprintf (stderr, _T("%s\n"), userMessage);
     
183.   if (printErrorMessage) {
     
184.     eMsgLen = FormatMessage (FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM,
     
185.                              NULL, errNum, MAKELANGID (LANG_NEUTRAL, SUBLANG_DEFAULT),
     
186.                              (LPTSTR) &lpvSysMsg, 0, NULL);
     
187.     if (eMsgLen > 0)
     
188.     {
     
189.       _ftprintf (stderr, _T("%s\n"), lpvSysMsg);
     
190.     }
     
191.     else
     
192.     {
     
193.       _ftprintf (stderr, _T("Last Error Number; %d.\n"), (int)errNum);
     
194.     }
     
195. 
     
196.     if (lpvSysMsg != NULL) LocalFree (lpvSysMsg); /* Explained in Chapter 5. */
     
197.   }
     
198. 
     
199.   if (exitCode > 0)
     
200.     ExitProcess (exitCode);
     
201. 
     
202.   return;
     
203. }

三 运行截图

程序开始运行

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！

程序得到的网页内容

退出程序

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！

点击(此处)折叠或打开

1. /********************************************************************************
   
2. * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ *
   
3.     get-www
   
4.                                main.c
   
5. 
   
6.     Develop Team : ls
   
7.     Main Programmer : He YiJun (storysnail<at>gmail.com)
   
8.     License : GPLv3
   
9.     Last Update : 2013-03-03
   
10. * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ *
    
11. *********************************************************************************/
    
12. #include <stdlib.h>
    
13. #include <stdio.h>
    
14. #include <string.h>
    
15. #include <stdarg.h>
    
16. #include <sys/socket.h>
    
17. #include <netinet/in.h>
    
18. #include <netdb.h>
    
19. 
    
20. static int gw_connect(char *domain,int port)
    
21. {
    
22.   int sock_sd;
    
23.   int i;
    
24.   struct hostent *site_dns;
    
25.   struct sockaddr_in s_addr;
    
26.   site_dns = gethostbyname(domain);
    
27.   if(site_dns == NULL) {
    
28.     printf("gethostbyname error!\n");
    
29.     return -2;
    
30.   }
    
31.   printf("default ip: %s\n",inet_ntoa(*((struct in_addr *)site_dns->h_addr)));
    
32.   for(i=0; i< site_dns->h_length/sizeof(int); i++) {
    
33.     printf("IP:%d:%s\n",i+1,inet_ntoa(*((struct in_addr *)site_dns->h_addr_list[i])));
    
34.   }
    
35.   sock_sd = socket(AF_INET,SOCK_STREAM,0);
    
36.   if(sock_sd < 0) {
    
37.     printf ("socket error!");
    
38.     return -1;
    
39.   }
    
40.   memset(&s_addr,0,sizeof(struct sockaddr_in));
    
41.   memcpy(&s_addr.sin_addr,site_dns ->h_addr_list[0],site_dns->h_length);
    
42.   s_addr.sin_family = AF_INET;
    
43.   s_addr.sin_port = htons(port);
    
44.   printf("s_addr ip: %s",inet_ntoa(*((struct in_addr *)&s_addr.sin_addr)));
    
45.   return (connect(sock_sd,(struct sockaddr *)&s_addr,sizeof(struct sockaddr)) < 0 ? -1 : sock_sd);
    
46. }
    
47. 
    
48. static int gw_send(int sock_sd,char *fmt,...)
    
49. {
    
50.   char buf [1024];
    
51.   va_list argptr;
    
52.   va_start(argptr,fmt);
    
53.   vsprintf(buf,fmt,argptr);
    
54.   va_end(argptr);
    
55.   printf("Send:\n%s\n",buf);
    
56.   return send(sock_sd,buf,strlen(buf),0);
    
57. }
    
58. 
    
59. void main(int argc,char **argv)
    
60. {
    
61.   int sock_sd;
    
62.   char rBuf[3];
    
63.   sock_sd = gw_connect("www.7fane.com",80);
    
64.   if(sock_sd < 0) {
    
65.     printf("connect error!\n");
    
66.     return;
    
67.   }
    
68.   //注意：该网站只用于个人测试，在2013年11月末到期，
    
69.   //如果你在之后的日期使用，请使用其它网页地址
    
70.   gw_send(sock_sd,"GET http://www.7fane.com/test.html\n");
    
71.   gw_send(sock_sd,"%c",10);
    
72.   while(read(sock_sd,rBuf,1) > 0)
    
73.     printf("%c",rBuf[0]);
    
74.   close(sock_sd);
    
75.   return;
    
76. }