webcit/groupdav_put.c

   1 /*
   2  * $Id$
   3  *
   4  * Handles GroupDAV PUT requests.
   5  *
   6  */
   7
   8 #include <ctype.h>
   9 #include <stdlib.h>
  10 #include <unistd.h>
  11 #include <stdio.h>
  12 #include <fcntl.h>
  13 #include <signal.h>
  14 #include <sys/types.h>
  15 #include <sys/wait.h>
  16 #include <sys/socket.h>
  17 #include <limits.h>
  18 #include <string.h>
  19 #include <pwd.h>
  20 #include <errno.h>
  21 #include <stdarg.h>
  22 #include <time.h>
  23 #include <pthread.h>
  24 #include "webcit.h"
  25 #include "webserver.h"
  26 #include "groupdav.h"
  27
  28
  29 /*
  30  * The pathname is always going to be /groupdav/room_name/euid
  31  */
  32 void groupdav_put(char *dav_pathname, char *dav_ifmatch,
  33                 char *supplied_content_type, char *dav_content
  34 ) {
  35         char dav_roomname[SIZ];
  36         char dav_uid[SIZ];
  37         char dav_content_type[SIZ];
  38         long new_msgnum = (-2L);
  39         long old_msgnum = (-1L);
  40         char buf[SIZ];
  41         int n = 0;
  42
  43         /* First, break off the "/groupdav/" prefix */
  44         remove_token(dav_pathname, 0, '/');
  45         remove_token(dav_pathname, 0, '/');
  46
  47         /* Now extract the message euid */
  48         n = num_tokens(dav_pathname, '/');
  49         extract_token(dav_uid, dav_pathname, n-1, '/');
  50         remove_token(dav_pathname, n-1, '/');
  51
  52         /* What's left is the room name.  Remove trailing slashes. */
  53         if (dav_pathname[strlen(dav_pathname)-1] == '/') {
  54                 dav_pathname[strlen(dav_pathname)-1] = 0;
  55         }
  56         strcpy(dav_roomname, dav_pathname);
  57
  58         /* Go to the correct room. */
  59         if (strcasecmp(WC->wc_roomname, dav_roomname)) {
  60                 gotoroom(dav_roomname);
  61         }
  62         if (strcasecmp(WC->wc_roomname, dav_roomname)) {
  63                 wprintf("HTTP/1.1 404 not found\r\n");
  64                 groupdav_common_headers();
  65                 wprintf(
  66                         "Content-Type: text/plain\r\n"
  67                         "\r\n"
  68                         "There is no folder called \"%s\" on this server.\r\n",
  69                         dav_roomname
  70                 );
  71                 return;
  72         }
  73
  74         /* Ugly hack to mess with the content type.  KOrganizer is either
  75          * not supplying one, or supplying the wrong one.
  76          * FIXME - remove this after KOrg gets fixed.
  77          */
  78         strcpy(dav_content_type, supplied_content_type);
  79         switch (WC->wc_view) {
  80                 case VIEW_ADDRESSBOOK:
  81                         strcpy(dav_content_type, "text/x-vcard");
  82                         break;
  83                 case VIEW_CALENDAR:
  84                         strcpy(dav_content_type, "text/calendar");
  85                         break;
  86                 case VIEW_TASKS:
  87                         strcpy(dav_content_type, "text/calendar");
  88                         break;
  89                 default:
  90                         break;
  91         }
  92
  93         /*
  94          * If an HTTP If-Match: header is present, the client is attempting
  95          * to replace an existing item.  We have to check to see if the
  96          * message number associated with the supplied uid matches what the
  97          * client is expecting.  If not, the server probably contains a newer
  98          * version, so we fail...
  99          */
 100         if (strlen(dav_ifmatch) > 0) {
 101                 lprintf(9, "dav_ifmatch: %s\n", dav_ifmatch);
 102                 old_msgnum = locate_message_by_uid(dav_uid);
 103                 lprintf(9, "old_msgnum:  %ld\n", old_msgnum);
 104                 if (atol(dav_ifmatch) != old_msgnum) {
 105                         wprintf("HTTP/1.1 412 Precondition Failed\r\n");
 106                         lprintf(9, "HTTP/1.1 412 Precondition Failed\r\n");
 107                         groupdav_common_headers();
 108                         wprintf("Content-Length: 0\r\n\r\n");
 109                         return;
 110                 }
 111         }
 112
 113         /*
 114          * We are cleared for upload!  We use the new calling syntax for ENT0
 115          * which allows a confirmation to be sent back to us.  That's how we
 116          * extract the message ID.
 117          */
 118         serv_puts("ENT0 1|||4|||1|");
 119         serv_gets(buf);
 120         if (buf[0] != '8') {
 121                 wprintf("HTTP/1.1 502 Bad Gateway\r\n");
 122                 groupdav_common_headers();
 123                 wprintf("Content-type: text/plain\r\n"
 124                         "\r\n"
 125                         "%s\r\n", &buf[4]
 126                 );
 127                 return;
 128         }
 129
 130         /* Send the content to the Citadel server */
 131         serv_printf("Content-type: %s\n\n", dav_content_type);
 132         serv_puts(dav_content);
 133         serv_puts("\n000");
 134
 135         /* Fetch the reply from the Citadel server */
 136         n = 0;
 137         strcpy(dav_uid, "");
 138         while (serv_gets(buf), strcmp(buf, "000")) {
 139                 switch(n++) {
 140                         case 0: new_msgnum = atol(buf);
 141                                 break;
 142                         case 1: lprintf(9, "new_msgnum=%ld (%s)\n", new_msgnum, buf);
 143                                 break;
 144                         case 2: strcpy(dav_uid, buf);
 145                                 break;
 146                         default:
 147                                 break;
 148                 }
 149         }
 150
 151         /* Tell the client what happened. */
 152
 153         /* Citadel failed in some way? */
 154         if (new_msgnum < 0L) {
 155                 wprintf("HTTP/1.1 502 Bad Gateway\r\n");
 156                 groupdav_common_headers();
 157                 wprintf("Content-type: text/plain\r\n"
 158                         "\r\n"
 159                         "new_msgnum is %ld\r\n"
 160                         "\r\n", new_msgnum
 161                 );
 162                 return;
 163         }
 164
 165         /* We created this item for the first time. */
 166         if (old_msgnum < 0L) {
 167                 wprintf("HTTP/1.1 201 Created\r\n");
 168                 lprintf(9, "HTTP/1.1 201 Created\r\n");
 169                 groupdav_common_headers();
 170                 wprintf("Content-Length: 0\r\n");
 171                 wprintf("Location: ");
 172                 if (strlen(WC->http_host) > 0) {
 173                         wprintf("%s://%s",
 174                                 (is_https ? "https" : "http"),
 175                                 WC->http_host);
 176                 }
 177                 wprintf("/groupdav/");
 178                 urlescputs(dav_roomname);
 179                 wprintf("/%s\r\n", dav_uid);
 180                 wprintf("\r\n");
 181                 return;
 182         }
 183
 184         /* We modified an existing item. */
 185         wprintf("HTTP/1.1 204 No Content\r\n");
 186         lprintf(9, "HTTP/1.1 204 No Content\r\n");
 187         groupdav_common_headers();
 188         wprintf("Content-Length: 0\r\n\r\n");
 189
 190         /* The item we replaced has probably already been deleted by
 191          * the Citadel server, but we'll do this anyway, just in case.
 192          */
 193         serv_printf("DELE %ld", old_msgnum);
 194         serv_gets(buf);
 195
 196         return;
 197 }