webcit/webcit.c

   1 /*
   2  * webcit.c
   3  *
   4  * This is the actual program called by the webserver.  It maintains a
   5  * persistent session to the Citadel server, handling HTTP WebCit requests as
   6  * they arrive and presenting a user interface.
   7  */
   8
   9 #include <stdlib.h>
  10 #include <unistd.h>
  11 #include <stdio.h>
  12 #include <ctype.h>
  13 #include <string.h>
  14 #include <errno.h>
  15
  16 int wc_session;
  17 char wc_host[256];
  18 int wc_port;
  19 char wc_username[256];
  20 char wc_password[256];
  21 char wc_roomname[256];
  22
  23 void getz(char *buf) {
  24         if (fgets(buf, 256, stdin) == NULL) strcpy(buf, "");
  25         else {
  26                 while ((strlen(buf)>0)&&(!isprint(buf[strlen(buf)-1])))
  27                         buf[strlen(buf)-1] = 0;
  28                 }
  29         }
  30
  31 void output_reconnect_cookies() {
  32         printf("Set-cookie: wc_session=%d\n", wc_session);
  33         if (strlen(wc_host)>0) printf("Set-cookie: wc_host=%s\n", wc_host);
  34         if (wc_port != 0) printf("Set-cookie: wc_port=%d\n", wc_port);
  35         if (strlen(wc_username)>0) printf("Set-cookie: wc_username=%s\n",
  36                 wc_username);
  37         if (strlen(wc_password)>0) printf("Set-cookie: wc_password=%s\n",
  38                 wc_password);
  39         if (strlen(wc_roomname)>0) printf("Set-cookie: wc_roomname=%s\n",
  40                 wc_roomname);
  41         }
  42
  43 void output_static(char *what) {
  44         char buf[256];
  45         FILE *fp;
  46
  47         sprintf(buf, "static/%s", what);
  48         fp = fopen(buf, "rb");
  49         if (fp == NULL) {
  50                 printf("HTTP/1.0 404 %s\n", strerror(errno));
  51                 printf("Server: WebCit v2 (Velma)\n");
  52                 printf("Connection: close\n");
  53                 output_reconnect_cookies();
  54                 printf("Content-Type: text/plain\n");
  55                 sprintf(buf, "%s: %s\n", what, strerror(errno));
  56                 printf("Content-length: %d\n", strlen(buf));
  57                 printf("\n");
  58                 fwrite(buf, strlen(buf), 1, stdout);
  59                 }
  60         else {
  61                 printf("HTTP/1.0 200 OK\n");
  62                 printf("Server: WebCit v2 (Velma)\n");
  63                 printf("Connection: close\n");
  64                 output_reconnect_cookies();
  65                 printf("Content-Type: text/plain\n");
  66                 printf("Content-length: 11\n");
  67                 printf("\n");
  68                 printf("Hi from IG\n");
  69                 fclose(fp);
  70                 }
  71         }
  72
  73
  74 void session_loop() {
  75         char cmd[256];
  76         char buf[256];
  77         char content[4096];
  78         static int TransactionCount = 0;
  79         int a;
  80
  81         getz(cmd);
  82         do {
  83                 getz(buf);
  84                 } while(strlen(buf)>0);
  85
  86         fprintf(stderr, "Command: %s\n", cmd);
  87         fflush(stderr);
  88
  89         if (!strncasecmp(cmd, "GET /static/", 12)) {
  90                 strcpy(buf, &cmd[12]);
  91                 for (a=0; a<strlen(buf); ++a) if (isspace(buf[a])) buf[a]=0;
  92                 output_static(buf);
  93                 }
  94
  95         else {
  96                 printf("HTTP/1.0 200 OK\n");
  97                 printf("Server: WebCit v2 (Velma)\n");
  98                 printf("Connection: close\n");
  99                 output_reconnect_cookies();
 100                 printf("Content-Type: text/html\n");
 101
 102                 strcpy(content, "");
 103
 104                 sprintf(&content[strlen(content)],
 105                         "<HTML><HEAD><TITLE>WebCit</TITLE></HEAD><BODY>\n");
 106                 sprintf(&content[strlen(content)],
 107                         "TransactionCount is %d<HR>\n", ++TransactionCount);
 108                 sprintf(&content[strlen(content)],
 109                         "You're in session %d<BR>\n", wc_session);
 110                 sprintf(&content[strlen(content)],
 111                         "</BODY></HTML>\n");
 112
 113                 printf("Content-length: %d\n", strlen(content));
 114                 printf("\n");
 115                 fwrite(content, strlen(content), 1, stdout);
 116                 }
 117
 118         fflush(stdout);
 119         }
 120
 121
 122
 123 int main(int argc, char *argv[]) {
 124
 125         if (argc != 2) {
 126                 printf("%s: usage: %s <session_id>\n", argv[0], argv[0]);
 127                 exit(1);
 128                 }
 129
 130         wc_session = atoi(argv[1]);
 131         strcpy(wc_host, "");
 132         wc_port = 0;
 133         strcpy(wc_username, "");
 134         strcpy(wc_password, "");
 135         strcpy(wc_roomname, "");
 136
 137         while (1) {
 138                 session_loop();
 139                 }
 140
 141         exit(0);
 142         }