webcit/groupdav_main.c

   1 /*
   2  * $Id$
   3  *
   4  * Entry point for GroupDAV functions
   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  * Output HTTP headers which are common to all requests.
  31  */
  32 void groupdav_common_headers(void) {
  33         wprintf(
  34                 "Server: %s / %s\n"
  35                 "Connection: close\n",
  36                 SERVER, serv_info.serv_software
  37         );
  38 }
  39
  40
  41 /*
  42  * Main entry point for GroupDAV requests
  43  */
  44 void groupdav_main(struct httprequest *req,
  45                         char *dav_content_type,
  46                         int dav_content_length,
  47                         char *dav_content
  48 ) {
  49         struct httprequest *rptr;
  50         char dav_method[SIZ];
  51         char dav_pathname[SIZ];
  52         char dav_ifmatch[SIZ];
  53
  54         strcpy(dav_method, "");
  55         strcpy(dav_pathname, "");
  56         strcpy(dav_ifmatch, "");
  57
  58         for (rptr=req; rptr!=NULL; rptr=rptr->next) {
  59                 if (!strncasecmp(rptr->line, "Host: ", 6)) {
  60                         safestrncpy(WC->http_host, &rptr->line[6],
  61                                 sizeof WC->http_host);
  62                 }
  63                 if (!strncasecmp(rptr->line, "If-Match: ", 10)) {
  64                         safestrncpy(dav_ifmatch, &rptr->line[10],
  65                                 sizeof dav_ifmatch);
  66                 }
  67         }
  68
  69         if (!WC->logged_in) {
  70                 wprintf("HTTP/1.1 401 Unauthorized\n");
  71                 groupdav_common_headers();
  72                 wprintf("WWW-Authenticate: Basic realm=\"%s\"\n",
  73                         serv_info.serv_humannode);
  74                 wprintf("Content-Type: text/plain\n");
  75                 wprintf("\n");
  76                 wprintf("GroupDAV sessions require HTTP authentication.\n");
  77                 return;
  78         }
  79
  80         extract_token(dav_method, req->line, 0, ' ');
  81         extract_token(dav_pathname, req->line, 1, ' ');
  82         unescape_input(dav_pathname);
  83
  84         /*
  85          * If there's an If-Match: header, strip out the quotes if present, and
  86          * then if all that's left is an asterisk, make it go away entirely.
  87          */
  88         if (strlen(dav_ifmatch) > 0) {
  89                 if (dav_ifmatch[0] == '\"') {
  90                         strcpy(dav_ifmatch, &dav_ifmatch[1]);
  91                         if (strtok(dav_ifmatch, "\"") != NULL) {
  92                                 strcpy(strtok(dav_ifmatch, "\""), "");
  93                         }
  94                 }
  95                 if (!strcmp(dav_ifmatch, "*")) {
  96                         strcpy(dav_ifmatch, "");
  97                 }
  98         }
  99
 100         /*
 101          * The PROPFIND method is basically used to list all objects in a
 102          * room, or to list all relevant rooms on the server.
 103          */
 104         if (!strcasecmp(dav_method, "PROPFIND")) {
 105                 groupdav_propfind(dav_pathname);
 106                 return;
 107         }
 108
 109         /*
 110          * The GET method is used for fetching individual items.
 111          */
 112         if (!strcasecmp(dav_method, "GET")) {
 113                 groupdav_get(dav_pathname);
 114                 return;
 115         }
 116
 117         /*
 118          * The PUT method is used to add or modify items.
 119          */
 120         if (!strcasecmp(dav_method, "PUT")) {
 121                 groupdav_put(dav_pathname, dav_ifmatch,
 122                                 dav_content_type, dav_content);
 123                 return;
 124         }
 125
 126         /*
 127          * The DELETE method kills, maims, and destroys.
 128          */
 129         if (!strcasecmp(dav_method, "DELETE")) {
 130                 groupdav_delete(dav_pathname, dav_ifmatch);
 131                 return;
 132         }
 133
 134         /*
 135          * Couldn't find what we were looking for.  Die in a car fire.
 136          */
 137         wprintf("HTTP/1.1 501 Method not implemented\n");
 138         groupdav_common_headers();
 139         wprintf("Content-Type: text/plain\n"
 140                 "\n"
 141                 "GroupDAV method \"%s\" is not implemented.\n",
 142                 dav_method
 143         );
 144 }