fork download 
  1. #include <stdio.h>
  2. #include <stdlib.h>
  3. #include <string.h>
  4. #include <time.h>
  5.  
  6. #include <netdb.h>
  7. #include <sys/socket.h>
  8. #include <sys/types.h>
  9. #include <unistd.h>
  10.  
  11. enum {
  12. 	NPOSTS = 2,
  13. 	TIMEOUT = 5
  14. };
  15.  
  16. FILE *dial(const char *host, const char *port);
  17.  
  18. char **tokenise(const char *s, const char *delim);
  19.  
  20. size_t count_tokens(const char *s, const char *delim);
  21.  
  22. char *nth_token(char *to, size_t n, const char *s, const char *delim, size_t i);
  23.  
  24. void free_tokens(char **a);
  25.  
  26. static char buffer[2000000];
  27.  
  28. void post(const char *thread, const char *name, const char *email,
  29. 	  const char *comment)
  30. {
  31. 	FILE *iop;
  32.  
  33. 	if (!(iop = dial("dis.4chan.org", "80"))) {
  34. 		fputs("error: unable to connect to server\n", stderr);
  35. 		return;
  36. 	}
  37. 	sprintf(buffer, "bbs=prog&id=%s&shiichan=proper2&"
  38. 		"kotehan=%s&meiru=%s&com=%s&email=%%27", thread, name, email,
  39. 		comment);
  40. 	fprintf(iop,
  41. 		"POST /post HTTP/1.1\r\n"
  42. 		"Host: dis.4chan.org\r\n"
  43. 		"Connection: close\r\n"
  44. 		"Content-Type: application/x-www-form-urlencoded\r\n"
  45. 		"Content-Length: %lu\r\n\r\n%s",
  46. 		(unsigned long int) strlen(buffer), buffer);
  47. 	fflush(iop);
  48. 	getc(iop);
  49. 	fclose(iop);
  50. 	puts(thread);
  51. }
  52.  
  53. char *get(const char *page)
  54. {
  55. 	FILE *iop;
  56. 	size_t n;
  57.  
  58. 	puts("Connecting to server ...");
  59. 	if (!(iop = dial("dis.4chan.org", "80"))) {
  60. 		fputs("error: unable to connect to server\n", stderr);
  61. 		exit(EXIT_FAILURE);
  62. 	}
  63. 	fprintf(iop,
  64. 		"GET %s HTTP/1.1\r\n"
  65. 		"Host: dis.4chan.org\r\n"
  66. 		"Connection: close\r\n\r\n", page);
  67. 	fflush(iop);
  68. 	puts("Downloading thread list ...");
  69. 	n = fread(buffer, 1, sizeof buffer, iop);
  70. 	buffer[n] = '\0';
  71. 	fclose(iop);
  72. 	return buffer;
  73. }
  74.  
  75. int main(int argc, char *argv[])
  76. {
  77. 	char buf[1024];
  78. 	size_t n, i;
  79. 	char **a;
  80.  
  81. 	srand(time(0));
  82. 	if (!(a = tokenise(get("/prog/subject.txt"), "\n"))) {
  83. 		fputs("memory error\n", stderr);
  84. 		return EXIT_FAILURE;
  85. 	}
  86. 	for (n = i = 0; (a[n] = a[i]); i++)
  87. 		if (count_tokens(a[i], "<>") == 7)
  88. 			n++;
  89. 	puts("Starting ...");
  90. 	for (i = 0;;) {
  91. 		post(nth_token(buf, sizeof buf, a[rand() % n],
  92. 			       "<>", 3), "James+Gosling", "",
  93. 		     "GAWWZMACS+FLABBERGASTS+MY+AUDIENCE");
  94. 		if (++i == NPOSTS)
  95. 			break;
  96. 		sleep(TIMEOUT);
  97. 	}
  98. 	free_tokens(a);
  99. 	return 0;
  100. }
  101.  
  102. /* -------------------------------------------------------------------------- */
  103.  
  104. char *nth_token(char *to, size_t n, const char *s, const char *delim, size_t i)
  105. {
  106. 	size_t dsize = strlen(delim);
  107. 	char *save = to;
  108.  
  109. 	while (i--) {
  110. 		if (!(s = strstr(s, delim)))
  111. 			return 0;
  112. 		s += dsize;
  113. 	}
  114. 	while (--n && (*to = *s) && strncmp(s++, delim, dsize))
  115. 		to++;
  116. 	*to = '\0';
  117. 	return save;
  118. }
  119.  
  120. size_t count_tokens(const char *s, const char *delim)
  121. {
  122. 	size_t dsize = strlen(delim), n = 0;
  123.  
  124. 	while (*s) { 
  125. 		n++;
  126. 		while (*s && strncmp(s, delim, dsize))
  127. 			s++;
  128. 		if (!*s)
  129. 			break;
  130. 		s += dsize;
  131. 	}
  132. 	return n;
  133. }
  134.  
  135. void free_tokens(char **a)
  136. {
  137. 	free(*--a);
  138. 	free(a);
  139. }
  140.  
  141. static char **make_tokens(char **to, size_t n, char *s, const char *delim)
  142. {
  143. 	char **save = to, **endp = to + n - 1;
  144. 	size_t dsize = strlen(delim);
  145.  
  146. 	while (*s) {
  147. 		if (to < endp)
  148. 			*to++ = s;
  149. 		while (*s && strncmp(s, delim, dsize))
  150. 			s++;
  151. 		if (!*s)
  152. 			break;
  153. 		*s = '\0';
  154. 		s += dsize;
  155. 	}
  156. 	*to = 0;
  157. 	return save;
  158. }
  159.  
  160. char **tokenise(const char *s, const char *delim)
  161. {
  162. 	size_t n = count_tokens(s, delim) + 1;
  163. 	char **r;
  164.  
  165. 	if (!(r = malloc((n + 1) * sizeof *r)))
  166. 		return 0;
  167. 	if (!(*r = malloc(strlen(s) + 1))) {
  168. 		free(r);
  169. 		return 0;
  170. 	}
  171. 	return make_tokens(r + 1, n, strcpy(*r, s), delim);
  172. }
  173.  
  174. FILE *dial(const char *host, const char *port)
  175. {
  176. 	struct addrinfo hints;
  177. 	struct addrinfo *info, *ip;
  178. 	int fd;
  179.  
  180. 	memset(&hints, 0, sizeof hints);
  181. 	hints.ai_socktype = SOCK_STREAM;
  182. 	hints.ai_family = AF_UNSPEC;
  183. 	if (getaddrinfo(host, port, &hints, &info))
  184. 		return 0;
  185. 	for (ip = info; ip; ip = ip->ai_next) {
  186. 		if ((fd = socket(ip->ai_family, ip->ai_socktype,
  187. 				 ip->ai_protocol)) == -1)
  188. 			continue;
  189. 		if (!connect(fd, ip->ai_addr, ip->ai_addrlen))
  190. 			break;
  191. 		close(fd);
  192. 	}
  193. 	freeaddrinfo(info);
  194. 	return !ip ? 0 : fdopen(fd, "r+");
  195. }
Runtime error #stdin #stdout 0s 4028KB
comments (?)
stdin 
Standard input is empty
stdout 
Connecting to server ...
https://ideone.com/FWNN7o
language:
C (gcc 8.3)
created:
12 years ago
visibility:
public

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