webcit/groupdav_put.c

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