webcit/groupdav_put.c

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