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  1. #include <stdio.h>
  2. #include <stdlib.h>
  3. #include <string.h>
  4. #include <WinSock2.h>
  5.  
  6. void sendf(SOCKET *, char *);
  7. void sendrn(SOCKET *);
  8. void error(char *);
  9.  
  10. int main() {
  11.     int code;
  12.  
  13. 	WSADATA wsadata;
  14. 	puts("WSAStartup()");
  15. 	code = WSAStartup(MAKEWORD(1, 1), &wsadata);
  16. 	if (code != 0) error("WSAStartup()");
  17.  
  18. 	puts("socket()");
  19. 	SOCKET sServer = socket(AF_INET, SOCK_STREAM, 0);
  20. 	if (sServer == INVALID_SOCKET) error("socket()");
  21.  
  22. 	SOCKADDR_IN aServer;
  23. 	memset(&aServer, 0, sizeof(aServer));
  24. 	aServer.sin_family = PF_INET;
  25. 	aServer.sin_addr.s_addr = htonl(INADDR_ANY);
  26. 	aServer.sin_port = htons(4321);
  27.  
  28. 	puts("bind()");
  29. 	code = bind(sServer, (SOCKADDR *)&aServer, sizeof(aServer));
  30. 	if (code == SOCKET_ERROR) error("bind()");
  31.  
  32. 	puts("listen()");
  33. 	code = listen(sServer, 5);
  34. 	if (code == SOCKET_ERROR) error("bind()");
  35.  
  36. 	SOCKADDR_IN aClient;
  37. 	int aClientSize = sizeof(aClient);
  38. 	puts("accept()");
  39. 	SOCKET sClient = accept(sServer, (SOCKADDR *)&aClient, &aClientSize);
  40. 	if (sClient == INVALID_SOCKET) error("accpet()");
  41.  
  42. 	printf("Client connected: %s\n", inet_ntoa(aClient.sin_addr));
  43.  
  44. 	char c;
  45. 	boolean header = false;
  46. 	while (recv(sClient, &c, 1, 0) > 0) {
  47. 		printf("%c", c);
  48. 		if (c == '\r') {
  49. 			if (recv(sClient, &c, 1, 0) < 0) break;
  50. 			printf("%c", c);
  51. 			if (c == '\n') {
  52. 				if (header) {
  53. 					header = false;
  54. 					break;
  55. 				}
  56. 				else header = true;
  57. 			}
  58. 			else header = false;
  59. 		}
  60. 		else header = false;
  61. 	}
  62.  
  63. 	char buffer[8];
  64. 	for (int i=0; i<sizeof(buffer); i++) printf("%02d ", i);
  65. 	printf("\tText\n");
  66. 	for (int i=0; i<sizeof(buffer)*3-1; i++) printf("=");
  67. 	printf(" \t========\n");
  68.  
  69. 	int r;
  70. 	while ((r=recv(sClient, buffer, sizeof(buffer), 0)) > 0) {
  71. 		if (r < 0) break;
  72. 		for (int i=0; i<r; i++) {
  73. 			printf("%02x ", buffer[i]);
  74. 		}
  75. 		if (r < sizeof(buffer)) {
  76. 			for (int i=0; i<(sizeof(buffer)-r); i++) printf("   ");
  77. 		}
  78. 		printf("\t");
  79. 		for (int i=0; i<r; i++) {
  80. 			switch (buffer[i]) {
  81. 				case 0: case 10: case 13:
  82. 					buffer[i] = '.';
  83. 					break;
  84. 			}
  85. 			printf("%c", buffer[i]);
  86. 		}
  87. 		printf("\n");
  88. 		if (r < sizeof(buffer)) break;
  89. 	}
  90. 	printf("\n");
  91.  
  92. 	puts("Send response to Client.");
  93. 	sendf(&sClient, "HTTP/1.1 200 OK");
  94. 	sendf(&sClient, "Content-Type: text/html; Charset: UTF-8");
  95. 	sendrn(&sClient);
  96. 	sendf(&sClient, "<!DOCTYPE html>");
  97. 	sendf(&sClient, "<html>");
  98. 	sendf(&sClient, "<head>");
  99. 	sendf(&sClient, "<style>");
  100. 	sendf(&sClient, "body {");
  101. 	sendf(&sClient, "margin: 0px;");
  102. 	sendf(&sClient, "padding: 0px;");
  103. 	sendf(&sClient, "font-family: Dotum;");
  104. 	sendf(&sClient, "font-size: 12px;");
  105. 	sendf(&sClient, "}");
  106. 	sendf(&sClient, "#test_div {");
  107. 	sendf(&sClient, "margin: 10px;");
  108. 	sendf(&sClient, "width: 100px;");
  109. 	sendf(&sClient, "height: 100px;");
  110. 	sendf(&sClient, "background: #700;");
  111. 	sendf(&sClient, "border: 3px solid #000;");
  112. 	sendf(&sClient, "border-radius: 3px;");
  113. 	sendf(&sClient, "}");
  114. 	sendf(&sClient, "</style>");
  115. 	sendf(&sClient, "<title>title</title>");
  116. 	sendf(&sClient, "</head>");
  117. 	sendf(&sClient, "<body>");
  118. 	sendf(&sClient, "Hello");
  119. 	sendf(&sClient, "<div id='test_div'></div>");
  120. 	sendf(&sClient, "</body>");
  121. 	sendf(&sClient, "</html>");
  122.  
  123. 	closesocket(sClient);
  124.  
  125. 	closesocket(sServer);
  126.  
  127. 	WSACleanup();
  128.  
  129. 	exit(0);
  130. }
  131.  
  132. void sendf(SOCKET *socket, char *s) {
  133. 	send(*socket, s, strlen(s), 0);
  134. 	sendrn(socket);
  135. }
  136. void sendrn(SOCKET *socket) {
  137. 	send(*socket, "\r\n", 2, 0);
  138. }
  139. void error(char *s) {
  140. 	fprintf(stderr, "Error: \n", s);
  141. }
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https://ideone.com/UVU5RE
language:
C++ (gcc 8.3)
created:
12 years ago
visibility:
secret

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