webcit/groupdav_get.c

   1 /*
   2  * $Id$
   3  *
   4  * Handles GroupDAV GET requests.
   5  *
   6  */
   7
   8 #include "webcit.h"
   9 #include "webserver.h"
  10 #include "groupdav.h"
  11
  12
  13 /*
  14  * Fetch the entire contents of the room as one big ics file.
  15  * This is for "webcal://" type access.
  16  */
  17 void groupdav_get_big_ics(void) {
  18         char buf[1024];
  19
  20         serv_puts("ICAL getics");
  21         serv_getln(buf, sizeof buf);
  22         if (buf[0] != '1') {
  23                 hprintf("HTTP/1.1 404 not found\r\n");
  24                 groupdav_common_headers();
  25                 hprintf("Content-Type: text/plain\r\n");
  26                 wprintf("%s\r\n",
  27                         &buf[4]
  28                         );/* TODO: do we need to end-burst here? */
  29                 return;
  30         }
  31
  32         hprintf("HTTP/1.1 200 OK\r\n");
  33         groupdav_common_headers();
  34         hprintf("Content-type: text/calendar; charset=UTF-8\r\n");
  35         begin_burst();
  36         while (serv_getln(buf, sizeof buf), strcmp(buf, "000")) {
  37                 wprintf("%s\r\n", buf);
  38         }
  39         end_burst();
  40 }
  41
  42
  43 /*
  44  * MIME parser callback function for groupdav_get()
  45  * Helps identify the relevant section of a multipart message
  46  */
  47 void extract_preferred(char *name, char *filename, char *partnum, char *disp,
  48                         void *content, char *cbtype, char *cbcharset,
  49                         size_t length, char *encoding, char *cbid, void *userdata)
  50 {
  51         struct epdata *epdata = (struct epdata *)userdata;
  52         int hit = 0;
  53
  54         /* We only want the first one that we found */
  55         if (!IsEmptyStr(epdata->found_section)) return;
  56
  57         /* Check for a content type match */
  58         if (strlen(epdata->desired_content_type_1) > 0) {
  59                 if (!strcasecmp(epdata->desired_content_type_1, cbtype)) {
  60                         hit = 1;
  61                 }
  62         }
  63         if (!IsEmptyStr(epdata->desired_content_type_2)) {
  64                 if (!strcasecmp(epdata->desired_content_type_2, cbtype)) {
  65                         hit = 1;
  66                 }
  67         }
  68
  69         /* Is this the one?  If so, output it. */
  70         if (hit) {
  71                 safestrncpy(epdata->found_section, partnum, sizeof epdata->found_section);
  72                 if (!IsEmptyStr(cbcharset)) {
  73                         safestrncpy(epdata->charset, cbcharset, sizeof epdata->charset);
  74                 }
  75                 hprintf("Content-type: %s; charset=%s\r\n", cbtype, epdata->charset);
  76                 begin_burst();
  77                 StrBufAppendBufPlain(WC->WBuf, content, length, 0);
  78                 end_burst();
  79         }
  80 }
  81
  82
  83
  84 /*
  85  * The pathname is always going to take one of two formats:
  86  * /groupdav/room_name/euid     (GroupDAV)
  87  * /groupdav/room_name          (webcal)
  88  */
  89 void groupdav_get(StrBuf *dav_pathname) {
  90         StrBuf *dav_roomname;
  91         StrBuf *dav_uid;
  92         long dav_msgnum = (-1);
  93         char buf[1024];
  94         int in_body = 0;
  95         int found_content_type = 0;
  96         char *ptr;
  97         char *endptr;
  98         char *msgtext = NULL;
  99         size_t msglen = 0;
 100         size_t msgalloc = 0;
 101         int linelen;
 102         char content_type[128];
 103         char charset[128];
 104         char date[128];
 105         struct epdata epdata;
 106
 107         if (StrBufNum_tokens(dav_pathname, '/') < 3) {
 108                 hprintf("HTTP/1.1 404 not found\r\n");
 109                 groupdav_common_headers();
 110                 hprintf("Content-Type: text/plain\r\n");
 111                 wprintf("The object you requested was not found.\r\n");
 112                 end_burst();
 113                 return;
 114         }
 115
 116         dav_roomname = NewStrBuf();;
 117         dav_uid = NewStrBuf();;
 118         StrBufExtract_token(dav_roomname, dav_pathname, 2, '/');
 119         StrBufExtract_token(dav_uid, dav_pathname, 3, '/');
 120         if ((!strcasecmp(ChrPtr(dav_uid), "ics")) ||
 121             (!strcasecmp(ChrPtr(dav_uid), "calendar.ics"))) {
 122                 FlushStrBuf(dav_uid);
 123         }
 124
 125         /* Go to the correct room. */
 126         if (strcasecmp(ChrPtr(WC->wc_roomname), ChrPtr(dav_roomname))) {
 127                 gotoroom(dav_roomname);
 128         }
 129         if (strcasecmp(ChrPtr(WC->wc_roomname), ChrPtr(dav_roomname))) {
 130                 hprintf("HTTP/1.1 404 not found\r\n");
 131                 groupdav_common_headers();
 132                 hprintf("Content-Type: text/plain\r\n");
 133                 wprintf("There is no folder called \"%s\" on this server.\r\n",
 134                         ChrPtr(dav_roomname));
 135                 end_burst();
 136                 FreeStrBuf(&dav_roomname);
 137                 FreeStrBuf(&dav_uid);
 138                 return;
 139         }
 140
 141         /** GET on the collection itself returns an ICS of the entire collection.
 142          */
 143         if (StrLength(dav_uid) > 0) {
 144                 groupdav_get_big_ics();
 145                 FreeStrBuf(&dav_roomname);
 146                 FreeStrBuf(&dav_uid);
 147                 return;
 148         }
 149
 150         dav_msgnum = locate_message_by_uid(ChrPtr(dav_uid));
 151         serv_printf("MSG2 %ld", dav_msgnum);
 152         serv_getln(buf, sizeof buf);
 153         if (buf[0] != '1') {
 154                 hprintf("HTTP/1.1 404 not found\r\n");
 155                 groupdav_common_headers();
 156                 hprintf("Content-Type: text/plain\r\n");
 157                 wprintf("Object \"%s\" was not found in the \"%s\" folder.\r\n",
 158                         ChrPtr(dav_uid),
 159                         ChrPtr(dav_roomname));
 160                 end_burst();
 161                 FreeStrBuf(&dav_roomname);
 162                 FreeStrBuf(&dav_uid);
 163                 return;
 164         }
 165         FreeStrBuf(&dav_roomname);
 166         FreeStrBuf(&dav_uid);
 167
 168         /* We got it; a message is now arriving from the server.  Read it in. */
 169
 170         in_body = 0;
 171         found_content_type = 0;
 172         strcpy(charset, "UTF-8");
 173         strcpy(content_type, "text/plain");
 174         strcpy(date, "");
 175         while (serv_getln(buf, sizeof buf), strcmp(buf, "000")) {
 176                 linelen = strlen(buf);
 177
 178                 /* Append it to the buffer */
 179                 if ((msglen + linelen + 3) > msgalloc) {
 180                         msgalloc = ( (msgalloc > 0) ? (msgalloc * 2) : 1024 );
 181                         msgtext = realloc(msgtext, msgalloc);
 182                 }
 183                 strcpy(&msgtext[msglen], buf);
 184                 msglen += linelen;
 185                 strcpy(&msgtext[msglen], "\n");
 186                 msglen += 1;
 187
 188                 /* Also learn some things about the message */
 189                 if (linelen == 0) {
 190                         in_body = 1;
 191                 }
 192                 if (!in_body) {
 193                         if (!strncasecmp(buf, "Date:", 5)) {
 194                                 safestrncpy(date, &buf[5], sizeof date);
 195                                 striplt(date);
 196                         }
 197                         if (!strncasecmp(buf, "Content-type:", 13)) {
 198                                 safestrncpy(content_type, &buf[13], sizeof content_type);
 199                                 striplt(content_type);
 200                                 ptr = bmstrcasestr(&buf[13], "charset=");
 201                                 if (ptr) {
 202                                         safestrncpy(charset, ptr+8, sizeof charset);
 203                                         striplt(charset);
 204                                         endptr = strchr(charset, ';');
 205                                         if (endptr != NULL) strcpy(endptr, "");
 206                                 }
 207                                 endptr = strchr(content_type, ';');
 208                                 if (endptr != NULL) strcpy(endptr, "");
 209                         }
 210                 }
 211         }
 212         msgtext[msglen] = 0;
 213
 214         /* Output headers common to single or multi part messages */
 215
 216         hprintf("HTTP/1.1 200 OK\r\n");
 217         groupdav_common_headers();
 218         hprintf("etag: \"%ld\"\r\n", dav_msgnum);
 219         hprintf("Date: %s\r\n", date);
 220
 221         memset(&epdata, 0, sizeof(struct epdata));
 222         safestrncpy(epdata.charset, charset, sizeof epdata.charset);
 223
 224         /* If we have a multipart message on our hands, and we are in a groupware room,
 225          * strip it down to only the relevant part.
 226          */
 227         if (!strncasecmp(content_type, "multipart/", 10)) {
 228
 229                 if ( (WC->wc_default_view == VIEW_CALENDAR) || (WC->wc_default_view == VIEW_TASKS) ) {
 230                         strcpy(epdata.desired_content_type_1, "text/calendar");
 231                 }
 232
 233                 else if (WC->wc_default_view == VIEW_ADDRESSBOOK) {
 234                         strcpy(epdata.desired_content_type_1, "text/vcard");
 235                         strcpy(epdata.desired_content_type_2, "text/x-vcard");
 236                 }
 237
 238                 mime_parser(msgtext, &msgtext[msglen], extract_preferred, NULL, NULL, (void *)&epdata, 0);
 239         }
 240
 241         /* If epdata.found_section is empty, we haven't output anything yet, so output the whole thing */
 242
 243         if (IsEmptyStr(epdata.found_section)) {
 244                 ptr = msgtext;
 245                 endptr = &msgtext[msglen];
 246
 247                 hprintf("Content-type: %s; charset=%s\r\n", content_type, charset);
 248
 249                 in_body = 0;
 250                 do {
 251                         ptr = memreadline(ptr, buf, sizeof buf);
 252
 253                         if (in_body) {
 254                                 wprintf("%s\r\n", buf);
 255                         }
 256                         else if ((buf[0] == 0) && (in_body == 0)) {
 257                                 in_body = 1;
 258                                 begin_burst();
 259                         }
 260                 } while (ptr < endptr);
 261
 262                 end_burst();
 263         }
 264
 265         free(msgtext);
 266 }