webcit/serv_func.c

   1 /*
   2  * serv_func.c
   3  *
   4  * Handles various types of data transfer operations with the Citadel service.
   5  *
   6  * $Id$
   7  */
   8
   9 #include <ctype.h>
  10 #include <stdlib.h>
  11 #include <unistd.h>
  12 #include <stdio.h>
  13 #include <fcntl.h>
  14 #include <signal.h>
  15 #include <sys/types.h>
  16 #include <sys/wait.h>
  17 #include <sys/socket.h>
  18 #include <sys/time.h>
  19 #include <limits.h>
  20 #include <netinet/in.h>
  21 #include <netdb.h>
  22 #include <string.h>
  23 #include <pwd.h>
  24 #include <errno.h>
  25 #include <stdarg.h>
  26 #include <pthread.h>
  27 #include <signal.h>
  28 #include "webcit.h"
  29 #include "webserver.h"
  30
  31 struct serv_info serv_info;
  32
  33 /*
  34  * get info about the server we've connected to
  35  */
  36 void get_serv_info(char *browser_host, char *user_agent)
  37 {
  38         char buf[SIZ];
  39         int a;
  40
  41         /* Tell the server what kind of client is connecting */
  42         serv_printf("IDEN %d|%d|%d|%s|%s",
  43                 DEVELOPER_ID,
  44                 CLIENT_ID,
  45                 CLIENT_VERSION,
  46                 user_agent,
  47                 browser_host
  48         );
  49         serv_gets(buf);
  50
  51         /* Tell the server what kind of richtext we prefer */
  52         serv_puts("MSGP text/html|text/plain");
  53         serv_gets(buf);
  54
  55         /* Now ask the server to tell us a little bit about itself... */
  56         serv_puts("INFO");
  57         serv_gets(buf);
  58         if (buf[0] != '1')
  59                 return;
  60
  61         a = 0;
  62         while (serv_gets(buf), strcmp(buf, "000")) {
  63                 switch (a) {
  64                 case 0:
  65                         serv_info.serv_pid = atoi(buf);
  66                         break;
  67                 case 1:
  68                         strcpy(serv_info.serv_nodename, buf);
  69                         break;
  70                 case 2:
  71                         strcpy(serv_info.serv_humannode, buf);
  72                         break;
  73                 case 3:
  74                         strcpy(serv_info.serv_fqdn, buf);
  75                         break;
  76                 case 4:
  77                         strcpy(serv_info.serv_software, buf);
  78                         break;
  79                 case 5:
  80                         serv_info.serv_rev_level = atoi(buf);
  81                         break;
  82                 case 6:
  83                         strcpy(serv_info.serv_bbs_city, buf);
  84                         break;
  85                 case 7:
  86                         strcpy(serv_info.serv_sysadm, buf);
  87                         break;
  88                 case 9:
  89                         strcpy(serv_info.serv_moreprompt, buf);
  90                         break;
  91                 }
  92                 ++a;
  93         }
  94 }
  95
  96
  97
  98 /*
  99  * Function to spit out Citadel variformat text in HTML
 100  * If fp is non-null, it is considered to be the file handle to read the
 101  * text from.  Otherwise, text is read from the server.
 102  */
 103 void fmout(FILE *fp, char *align)
 104 {
 105
 106         int intext = 0;
 107         int bq = 0;
 108         char buf[SIZ];
 109
 110         wprintf("<DIV ALIGN=%s>\n", align);
 111         while (1) {
 112                 if (fp == NULL)
 113                         serv_gets(buf);
 114                 if (fp != NULL) {
 115                         if (fgets(buf, SIZ, fp) == NULL)
 116                                 strcpy(buf, "000");
 117                         buf[strlen(buf) - 1] = 0;
 118                 }
 119                 if (!strcmp(buf, "000")) {
 120                         if (bq == 1)
 121                                 wprintf("</I>");
 122                         wprintf("</DIV><BR>\n");
 123                         return;
 124                 }
 125                 if ((intext == 1) && (isspace(buf[0]))) {
 126                         wprintf("<BR>");
 127                 }
 128                 intext = 1;
 129
 130                 /* Quoted text should be displayed in italics and in a
 131                  * different colour.  This code understands both Citadel/UX
 132                  * style " >" quotes and FordBoard-style " :-)" quotes.
 133                  */
 134                 if ((bq == 0) &&
 135                     ((!strncmp(buf, " >", 2)) || (!strncmp(buf, " :-)", 4)))) {
 136                         wprintf("<SPAN CLASS=\"pull_quote\">");
 137                         bq = 1;
 138                 } else if ((bq == 1) &&
 139                   (strncmp(buf, " >", 2)) && (strncmp(buf, " :-)", 4))) {
 140                         wprintf("</SPAN>");
 141                         bq = 0;
 142                 }
 143                 /* Activate embedded URL's */
 144                 url(buf);
 145
 146                 escputs(buf);
 147                 wprintf("\n");
 148         }
 149 }
 150
 151
 152
 153
 154 /*
 155  * Transmit message text (in memory) to the server.
 156  * If convert_to_html is set to 1, the message is converted into something
 157  * which kind of resembles HTML.
 158  */
 159 void text_to_server(char *ptr, int convert_to_html)
 160 {
 161         char buf[SIZ];
 162         int ch, a, pos;
 163
 164         if (convert_to_html) {
 165                 serv_puts("<HTML><BODY>");
 166         }
 167
 168         pos = 0;
 169         strcpy(buf, "");
 170
 171         while (ptr[pos] != 0) {
 172                 ch = ptr[pos++];
 173                 if (ch == 10) {
 174                         while ( (isspace(buf[strlen(buf) - 1]))
 175                           && (strlen(buf) > 1) )
 176                                 buf[strlen(buf) - 1] = 0;
 177                         serv_puts(buf);
 178                         strcpy(buf, "");
 179                         if (convert_to_html) {
 180                                 strcat(buf, "<BR>");
 181                         }
 182                         else {
 183                                 if (ptr[pos] != 0) strcat(buf, " ");
 184                         }
 185                 } else {
 186                         a = strlen(buf);
 187                         buf[a + 1] = 0;
 188                         buf[a] = ch;
 189                         if ((ch == 32) && (strlen(buf) > 200)) {
 190                                 buf[a] = 0;
 191                                 serv_puts(buf);
 192                                 strcpy(buf, "");
 193                         }
 194                         if (strlen(buf) > 250) {
 195                                 serv_puts(buf);
 196                                 strcpy(buf, "");
 197                         }
 198                 }
 199         }
 200         serv_puts(buf);
 201
 202         if (convert_to_html) {
 203                 serv_puts("</BODY></HTML>\n");
 204         }
 205
 206 }
 207
 208
 209
 210 /*
 211  * translate server message output to text
 212  * (used for editing room info files and such)
 213  */
 214 void server_to_text()
 215 {
 216         char buf[SIZ];
 217
 218         int count = 0;
 219
 220         while (serv_gets(buf), strcmp(buf, "000")) {
 221                 if ((buf[0] == 32) && (count > 0)) {
 222                         wprintf("\n");
 223                 }
 224                 wprintf("%s", buf);
 225                 ++count;
 226         }
 227 }
 228
 229
 230
 231 /*
 232  * Read binary data from server into memory using a series of
 233  * server READ commands.
 234  */
 235 void read_server_binary(char *buffer, size_t total_len) {
 236         char buf[SIZ];
 237         size_t bytes = 0;
 238         size_t thisblock = 0;
 239
 240         memset(buffer, 0, total_len);
 241         while (bytes < total_len) {
 242                 thisblock = 4095;
 243                 if ((total_len - bytes) < thisblock) {
 244                         thisblock = total_len - bytes;
 245                         if (thisblock == 0) return;
 246                 }
 247                 serv_printf("READ %d|%d", (int)bytes, (int)thisblock);
 248                 serv_gets(buf);
 249                 if (buf[0] == '6') {
 250                         thisblock = (size_t)atoi(&buf[4]);
 251                         if (!WC->connected) return;
 252                         serv_read(&buffer[bytes], thisblock);
 253                         bytes += thisblock;
 254                 }
 255                 else {
 256                         lprintf(3, "Error: %s\n", &buf[4]);
 257                         return;
 258                 }
 259         }
 260 }
 261
 262
 263 /*
 264  * Read text from server, appending to a string buffer until the
 265  * usual 000 terminator is found.  Caller is responsible for freeing
 266  * the returned pointer.
 267  */
 268 char *read_server_text(void) {
 269         char *text = NULL;
 270         size_t bytes_allocated = 0;
 271         size_t bytes_read = 0;
 272         int linelen;
 273         char buf[SIZ];
 274
 275         text = malloc(SIZ);
 276         if (text == NULL) {
 277                 return(NULL);
 278         }
 279         strcpy(text, "");
 280         bytes_allocated = SIZ;
 281
 282         while (serv_gets(buf), strcmp(buf, "000")) {
 283                 linelen = strlen(buf);
 284                 buf[linelen] = '\n';
 285                 buf[linelen+1] = 0;
 286                 ++linelen;
 287
 288                 if ((bytes_read + linelen) >= (bytes_allocated - 2)) {
 289                         bytes_allocated = 2 * bytes_allocated;
 290                         text = realloc(text, bytes_allocated);
 291                 }
 292
 293                 strcpy(&text[bytes_read], buf);
 294                 bytes_read += linelen;
 295         }
 296
 297         return(text);
 298 }