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
  46         struct httprequest *rptr;
  47         char dav_method[SIZ];
  48         char dav_pathname[SIZ];
  49         char dav_ifmatch[SIZ];
  50
  51         strcpy(dav_method, "");
  52         strcpy(dav_pathname, "");
  53         strcpy(dav_ifmatch, "");
  54
  55         for (rptr=req; rptr!=NULL; rptr=rptr->next) {
  56                 lprintf(9, "> %s\n", rptr->line);       /* FIXME we can eventually remove this trace */
  57                 if (!strncasecmp(rptr->line, "Host: ", 6)) {
  58                         safestrncpy(WC->http_host, &rptr->line[6], sizeof WC->http_host);
  59                 }
  60                 if (!strncasecmp(rptr->line, "If-Match: ", 10)) {
  61                         safestrncpy(dav_ifmatch, &rptr->line[10], sizeof dav_ifmatch);
  62                 }
  63
  64         }
  65
  66         if (!WC->logged_in) {
  67                 wprintf("HTTP/1.1 401 Unauthorized\n");
  68                 groupdav_common_headers();
  69                 wprintf("WWW-Authenticate: Basic realm=\"%s\"\n", serv_info.serv_humannode);
  70                 wprintf("Content-Type: text/plain\n");
  71                 wprintf("\n");
  72                 wprintf("GroupDAV sessions require HTTP authentication.\n");
  73                 return;
  74         }
  75
  76         extract_token(dav_method, req->line, 0, ' ');
  77         extract_token(dav_pathname, req->line, 1, ' ');
  78         unescape_input(dav_pathname);
  79
  80         /*
  81          * If there's an If-Match: header, strip out the quotes if present, and
  82          * then if all that's left is an asterisk, make it go away entirely.
  83          */
  84         if (strlen(dav_ifmatch) > 0) {
  85                 if (dav_ifmatch[0] == '\"') {
  86                         strcpy(dav_ifmatch, &dav_ifmatch[1]);
  87                         if (strtok(dav_ifmatch, "\"") != NULL) {
  88                                 strcpy(strtok(dav_ifmatch, "\""), "");
  89                         }
  90                 }
  91                 if (!strcmp(dav_ifmatch, "*")) {
  92                         strcpy(dav_ifmatch, "");
  93                 }
  94         }
  95
  96         /*
  97          * The PROPFIND method is basically used to list all objects in a room.
  98          */
  99         if (!strcasecmp(dav_method, "PROPFIND")) {
 100                 groupdav_propfind(dav_pathname);
 101                 return;
 102         }
 103
 104         /*
 105          * We like the GET method ... it's nice and simple.
 106          */
 107         if (!strcasecmp(dav_method, "GET")) {
 108                 groupdav_get(dav_pathname);
 109                 return;
 110         }
 111
 112         /*
 113          * The DELETE method kills, maims, and destroys.
 114          */
 115         if (!strcasecmp(dav_method, "DELETE")) {
 116                 groupdav_delete(dav_pathname, dav_ifmatch);
 117                 return;
 118         }
 119
 120         /*
 121          * Couldn't find what we were looking for.  Die in a car fire.
 122          */
 123         wprintf("HTTP/1.1 501 Method not implemented\n");
 124         groupdav_common_headers();
 125         wprintf("Content-Type: text/plain\n"
 126                 "\n"
 127                 "GroupDAV method \"%s\" is not implemented.\n",
 128                 dav_method
 129         );
 130 }