webcit-ng/server/user_functions.c

   1 // User functions
   2 //
   3 // Copyright (c) 1996-2023 by the citadel.org team
   4 //
   5 // This program is open source software.  Use, duplication, or
   6 // disclosure are subject to the GNU General Public License v3.
   7
   8 #include "webcit.h"
   9
  10
  11 // Fetch a user photo (avatar)
  12 void fetch_user_photo(struct http_transaction *h, struct ctdlsession *c, char *username) {
  13         char buf[1024];
  14         int content_length = 0;
  15         char content_type[1024];
  16         char *image = NULL;
  17         int actual_length = 0;
  18
  19         ctdl_printf(c, "DLUI %s", username);
  20         ctdl_readline(c, buf, sizeof(buf));
  21         if (buf[0] == '6') {
  22                 content_length = extract_int(&buf[4], 0);
  23                 extract_token(content_type, &buf[4], 3, '|', sizeof content_type);
  24
  25                 image = malloc(content_length);
  26                 if (image == NULL) {
  27                         do_502(h);
  28                         return;
  29                 }
  30                 actual_length = ctdl_read_binary(c, image, content_length);
  31
  32                 add_response_header(h, strdup("Content-type"), strdup(content_type));
  33                 h->response_code = 200;
  34                 h->response_string = strdup("OK");
  35                 h->response_body_length = actual_length;
  36                 h->response_body = image;
  37                 return;
  38         }
  39
  40         // The user has no avatar on file.  Redirect to a generic avatar.
  41         http_redirect(h, "/ctdl/s/images/generic-user-icon-32px.png");
  42
  43         // Sending a 404 makes the browser request the same thing over and over again.
  44         // do_404(h);
  45 }
  46
  47
  48 // Fetch a user bio (profile)
  49 void fetch_user_bio(struct http_transaction *h, struct ctdlsession *c, char *username) {
  50         do_404(h);      // FIXME finish this
  51 }
  52
  53
  54 // Client requested an object related to a user.
  55 void object_in_user(struct http_transaction *h, struct ctdlsession *c, char *requested_username) {
  56         char object_name[1024];
  57
  58         extract_token(object_name, h->url, 4, '/', sizeof object_name);
  59
  60         if (!strcasecmp(object_name, "userpic")) {              // user photo (avatar)
  61                 fetch_user_photo(h, c, requested_username);
  62                 return;
  63         }
  64
  65         if (!strcasecmp(object_name, "bio")) {                  // user bio (profile)
  66                 fetch_user_bio(h, c, requested_username);
  67                 return;
  68         }
  69
  70         do_404(h);                                              // unknown object
  71         return;
  72 }
  73
  74
  75 // Handle REST/DAV requests for the user itself (such as /ctdl/u/username
  76 // or /ctdl/i/username/ but *not* specific properties of the user)
  77 void the_user_itself(struct http_transaction *h, struct ctdlsession *c, char *username) {
  78         do_404(h);
  79 }
  80
  81
  82 // Dispatcher for "/ctdl/u" and "/ctdl/u/" for the user list
  83 void user_list(struct http_transaction *h, struct ctdlsession *c) {
  84         do_404(h);
  85 }
  86
  87
  88 // Dispatcher for paths starting with /ctdl/u/
  89 void ctdl_u(struct http_transaction *h, struct ctdlsession *c) {
  90         char requested_username[128];
  91         char buf[1024];
  92
  93         // All user-related functions require accessing the user in question.
  94         extract_token(requested_username, h->url, 3, '/', sizeof requested_username);
  95         unescape_input(requested_username);
  96
  97         if (IsEmptyStr(requested_username)) {                           //      /ctdl/u/
  98                 user_list(h, c);
  99                 return;
 100         }
 101
 102         // At this point we have extracted the name of the user we're interested in.
 103         // FIXME should we validate it?
 104
 105         if (num_tokens(h->url, '/') == 4) {                             //      /ctdl/u/username
 106                 the_user_itself(h, c, requested_username);
 107                 return;
 108         }
 109
 110         extract_token(buf, h->url, 4, '/', sizeof buf);
 111         if (num_tokens(h->url, '/') == 5) {
 112                 if (IsEmptyStr(buf)) {
 113                         the_user_itself(h, c, requested_username);      //      /ctdl/u/username/ (same as /ctdl/u/username)
 114                 }
 115                 else {
 116                         object_in_user(h, c, requested_username);       //      /ctdl/u/username/object
 117                 }
 118                 return;
 119         }
 120
 121         if (num_tokens(h->url, '/') == 6) {
 122                 object_in_user(h, c, requested_username);               //      /ctdl/u/username/object/ or possibly /ctdl/u/username/object/component
 123                 return;
 124         }
 125
 126         // If we get to this point, the client requested an action we don't know how to perform.
 127         do_404(h);
 128 }