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  * This function is for uploading an ENTIRE calendar, not just one
  15  * component.  This would be for webcal:// 'publish' operations, not
  16  * for GroupDAV.
  17  */
  18 void groupdav_put_bigics(StrBuf *dav_content, int offset)
  19 {
  20         char buf[1024];
  21
  22         /*
  23          * Tell the server that when we save a calendar event, we
  24          * do *not* want the server to generate invitations.
  25          */
  26         serv_puts("ICAL sgi|0");
  27         serv_getln(buf, sizeof buf);
  28
  29         serv_puts("ICAL putics");
  30         serv_getln(buf, sizeof buf);
  31         if (buf[0] != '4') {
  32                 hprintf("HTTP/1.1 502 Bad Gateway\r\n");
  33                 groupdav_common_headers();
  34                 hprintf("Content-type: text/plain\r\n");
  35                 wprintf("%s\r\n", &buf[4]);
  36                 end_burst();
  37                 return;
  38         }
  39
  40         serv_write(ChrPtr(dav_content) + offset, StrLength(dav_content) - offset);
  41         serv_printf("\n000");
  42
  43         /* Report success and not much else. */
  44         hprintf("HTTP/1.1 204 No Content\r\n");
  45         lprintf(9, "HTTP/1.1 204 No Content\r\n");
  46         groupdav_common_headers();
  47         begin_burst();
  48         end_burst();
  49 }
  50
  51
  52
  53 /*
  54  * The pathname is always going to take one of two formats:
  55  * /groupdav/room_name/euid     (GroupDAV)
  56  * /groupdav/room_name          (webcal)
  57  */
  58 void groupdav_put(StrBuf *dav_pathname, char *dav_ifmatch,
  59                   const char *dav_content_type, StrBuf *dav_content,
  60                   int offset)
  61 {
  62         StrBuf *dav_roomname;
  63         StrBuf *dav_uid;
  64         long new_msgnum = (-2L);
  65         long old_msgnum = (-1L);
  66         char buf[SIZ];
  67         int n = 0;
  68
  69         if (StrBufNum_tokens(dav_pathname, '/') < 3) {
  70                 hprintf("HTTP/1.1 404 not found\r\n");
  71                 groupdav_common_headers();
  72                 hprintf("Content-Type: text/plain\r\n");
  73                 wprintf("The object you requested was not found.\r\n");
  74                 end_burst();
  75                 return;
  76         }
  77
  78         dav_roomname = NewStrBuf();;
  79         dav_uid = NewStrBuf();;
  80         StrBufExtract_token(dav_roomname, dav_pathname, 2, '/');
  81         StrBufExtract_token(dav_uid, dav_pathname, 3, '/');
  82         if ((!strcasecmp(ChrPtr(dav_uid), "ics")) ||
  83             (!strcasecmp(ChrPtr(dav_uid), "calendar.ics"))) {
  84                 FlushStrBuf(dav_uid);
  85         }
  86
  87         /* Go to the correct room. */
  88         if (strcasecmp(ChrPtr(WC->wc_roomname), ChrPtr(dav_roomname))) {
  89                 gotoroom(dav_roomname);
  90         }
  91         if (strcasecmp(ChrPtr(WC->wc_roomname), ChrPtr(dav_roomname))) {
  92                 hprintf("HTTP/1.1 404 not found\r\n");
  93                 groupdav_common_headers();
  94                 hprintf("Content-Type: text/plain\r\n");
  95                 wprintf("There is no folder called \"%s\" on this server.\r\n",
  96                         ChrPtr(dav_roomname));
  97                 end_burst();
  98                 FreeStrBuf(&dav_roomname);
  99                 FreeStrBuf(&dav_uid);
 100                 return;
 101         }
 102
 103         /*
 104          * If an HTTP If-Match: header is present, the client is attempting
 105          * to replace an existing item.  We have to check to see if the
 106          * message number associated with the supplied uid matches what the
 107          * client is expecting.  If not, the server probably contains a newer
 108          * version, so we fail...
 109          */
 110         if (!IsEmptyStr(dav_ifmatch)) {
 111                 lprintf(9, "dav_ifmatch: %s\n", dav_ifmatch);
 112                 old_msgnum = locate_message_by_uid(ChrPtr(dav_uid));
 113                 lprintf(9, "old_msgnum:  %ld\n", old_msgnum);
 114                 if (atol(dav_ifmatch) != old_msgnum) {
 115                         hprintf("HTTP/1.1 412 Precondition Failed\r\n");
 116                         lprintf(9, "HTTP/1.1 412 Precondition Failed (ifmatch=%ld, old_msgnum=%ld)\r\n",
 117                                 atol(dav_ifmatch), old_msgnum);
 118                         groupdav_common_headers();
 119                         hprintf("Content-Length: 0\r\n");
 120                         end_burst();
 121                         FreeStrBuf(&dav_roomname);
 122                         FreeStrBuf(&dav_uid);
 123                         return;
 124                 }
 125         }
 126
 127         /** PUT on the collection itself uploads an ICS of the entire collection.
 128          */
 129         if (StrLength(dav_uid) == 0) {
 130                 groupdav_put_bigics(dav_content, offset);
 131                 FreeStrBuf(&dav_roomname);
 132                 FreeStrBuf(&dav_uid);
 133                 return;
 134         }
 135
 136         /*
 137          * We are cleared for upload!  We use the new calling syntax for ENT0
 138          * which allows a confirmation to be sent back to us.  That's how we
 139          * extract the message ID.
 140          */
 141         serv_puts("ENT0 1|||4|||1|");
 142         serv_getln(buf, sizeof buf);
 143         if (buf[0] != '8') {
 144                 hprintf("HTTP/1.1 502 Bad Gateway\r\n");
 145                 groupdav_common_headers();
 146                 hprintf("Content-type: text/plain\r\n");
 147
 148                 wprintf("%s\r\n", &buf[4]);
 149                 end_burst();
 150                 return;
 151         }
 152
 153         /* Send the content to the Citadel server */
 154         serv_printf("Content-type: %s\n\n", dav_content_type);
 155         serv_puts(ChrPtr(dav_content) + offset);
 156         serv_puts("\n000");
 157
 158         /* Fetch the reply from the Citadel server */
 159         n = 0;
 160         FlushStrBuf(dav_uid);
 161         while (serv_getln(buf, sizeof buf), strcmp(buf, "000")) {
 162                 switch(n++) {
 163                 case 0:
 164                         new_msgnum = atol(buf);
 165                         break;
 166                 case 1:
 167                         lprintf(9, "new_msgnum=%ld (%s)\n", new_msgnum, buf);
 168                         break;
 169                 case 2:
 170                         StrBufAppendBufPlain(dav_uid, buf, -1, 0);
 171                         break;
 172                 default:
 173                         break;
 174                 }
 175         }
 176
 177         /* Tell the client what happened. */
 178
 179         /* Citadel failed in some way? */
 180         if (new_msgnum < 0L) {
 181                 hprintf("HTTP/1.1 502 Bad Gateway\r\n");
 182                 groupdav_common_headers();
 183                 hprintf("Content-type: text/plain\r\n");
 184                 wprintf("new_msgnum is %ld\r\n"
 185                         "\r\n", new_msgnum);
 186                 end_burst();
 187                 FreeStrBuf(&dav_roomname);
 188                 FreeStrBuf(&dav_uid);
 189                 return;
 190         }
 191
 192         /* We created this item for the first time. */
 193         if (old_msgnum < 0L) {
 194                 char escaped_uid[1024];
 195                 hprintf("HTTP/1.1 201 Created\r\n");
 196                 lprintf(9, "HTTP/1.1 201 Created\r\n");
 197                 groupdav_common_headers();
 198                 hprintf("etag: \"%ld\"\r\n", new_msgnum);
 199                 hprintf("Location: ");
 200                 groupdav_identify_host();
 201                 hprintf("/groupdav/");/* TODO */
 202                 hurlescputs(ChrPtr(dav_roomname));
 203                 euid_escapize(escaped_uid, ChrPtr(dav_uid));
 204                 hprintf("/%s\r\n", escaped_uid);
 205                 end_burst();
 206                 FreeStrBuf(&dav_roomname);
 207                 FreeStrBuf(&dav_uid);
 208                 return;
 209         }
 210
 211         /* We modified an existing item. */
 212         hprintf("HTTP/1.1 204 No Content\r\n");
 213         lprintf(9, "HTTP/1.1 204 No Content\r\n");
 214         groupdav_common_headers();
 215         hprintf("Etag: \"%ld\"\r\n", new_msgnum);
 216         /* The item we replaced has probably already been deleted by
 217          * the Citadel server, but we'll do this anyway, just in case.
 218          */
 219         serv_printf("DELE %ld", old_msgnum);
 220         serv_getln(buf, sizeof buf);
 221         begin_burst();
 222         end_burst();
 223         FreeStrBuf(&dav_roomname);
 224         FreeStrBuf(&dav_uid);
 225         return;
 226 }