citadel/modules/image/serv_image.c

   1 /*
   2  * Copyright (c) 1987-2016 by the citadel.org team
   3  *
   4  * This program is open source software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 3 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  */
  14
  15 #include "ctdl_module.h"
  16 #include "config.h"
  17
  18 #include <sys/types.h>
  19 #include <sys/stat.h>
  20 #include <dirent.h>
  21
  22
  23
  24 /*
  25  * DownLoad User Image (see their avatar or photo or whatever)
  26  * If this command succeeds, it follows the same protocol as the DLAT command.
  27  */
  28 void cmd_dlui(char *cmdbuf)
  29 {
  30         struct ctdluser ruser;
  31         char buf[SIZ];
  32
  33         extract_token(buf, cmdbuf, 0, '|', sizeof buf);
  34         if (CtdlGetUser(&ruser, buf) != 0) {
  35                 cprintf("%d No such user.\n", ERROR + NO_SUCH_USER);
  36                 return;
  37         }
  38         if (ruser.msgnum_pic < 1) {
  39                 cprintf("%d No image found.\n", ERROR + FILE_NOT_FOUND);
  40                 return;
  41         }
  42
  43         struct CtdlMessage *msg = CtdlFetchMessage(ruser.msgnum_pic, 1, 1);
  44         if (msg != NULL) {
  45                 // The call to CtdlOutputPreLoadedMsg() with MT_SPEW_SECTION will cause the DLUI command
  46                 // to have the same output format as the DLAT command, because it calls the same code.
  47                 // For example: 600 402132|-1||image/gif|
  48                 safestrncpy(CC->download_desired_section, "1", sizeof CC->download_desired_section);
  49                 CtdlOutputPreLoadedMsg(msg, MT_SPEW_SECTION, HEADERS_NONE, 1, 0, 0);
  50                 CM_Free(msg);
  51         }
  52         else {
  53                 cprintf("%d No image found.\n", ERROR + MESSAGE_NOT_FOUND);
  54                 return;
  55         }
  56 }
  57
  58
  59
  60
  61 /*
  62  * Import function called by import_old_userpic_files() for a single user
  63  */
  64 void import_one_userpic_file(char *username, long usernum, char *path)
  65 {
  66         syslog(LOG_DEBUG, "Import legacy userpic for %s, usernum=%ld, filename=%s", username, usernum, path);
  67
  68         FILE *fp = fopen(path, "r");
  69         if (!fp) return;
  70
  71         fseek(fp, 0, SEEK_END);
  72         long data_length = ftell(fp);
  73
  74         if (data_length >= 1) {
  75                 rewind(fp);
  76                 char *unencoded_data = malloc(data_length);
  77                 if (unencoded_data) {
  78                         fread(unencoded_data, data_length, 1, fp);
  79                         char *encoded_data = malloc((data_length * 2) + 100);
  80                         if (encoded_data) {
  81                                 // FIXME try to guess the content-type based on the filename, don't assume GIF
  82                                 sprintf(encoded_data, "Content-type: image/gif\nContent-transfer-encoding: base64\n\n");
  83                                 CtdlEncodeBase64(&encoded_data[strlen(encoded_data)], unencoded_data, data_length, 1);
  84
  85                                 char userconfigroomname[ROOMNAMELEN];
  86                                 struct ctdluser usbuf;
  87
  88                                 if (CtdlGetUser(&usbuf, username) == 0) {       // no need to lock it , we are still initializing
  89                                         long old_msgnum = usbuf.msgnum_pic;
  90                                         CtdlMailboxName(userconfigroomname, sizeof userconfigroomname, &usbuf, USERCONFIGROOM);
  91                                         long new_msgnum = quickie_message("Citadel", NULL, NULL, userconfigroomname, encoded_data, FMT_RFC822, "Photo imported from file");
  92                                         syslog(LOG_DEBUG, "Message %ld is now the profile for %s", new_msgnum, username);
  93                                         usbuf.msgnum_pic = new_msgnum;
  94                                         CtdlPutUser(&usbuf);
  95                                         unlink(path);                           // delete the old file , it's in the database now
  96                                         if (old_msgnum > 0) {
  97                                                 syslog(LOG_DEBUG, "Deleting old message %ld from %s", old_msgnum, userconfigroomname);
  98                                                 CtdlDeleteMessages(userconfigroomname, &old_msgnum, 1, "");
  99                                         }
 100                                 }
 101                                 free(encoded_data);
 102                         }
 103                         free(unencoded_data);
 104                 }
 105         }
 106         fclose(fp);
 107 }
 108
 109
 110 /*
 111  * Look for old-format "userpic" files and import them into the message base
 112  */
 113 void import_old_userpic_files(void)
 114 {
 115         DIR *filedir = NULL;
 116         struct dirent *filedir_entry;
 117         struct dirent *d;
 118         size_t d_namelen;
 119         struct ctdluser usbuf;
 120         long usernum = 0;
 121         int d_type = 0;
 122         struct stat s;
 123         char path[PATH_MAX];
 124
 125
 126         syslog(LOG_DEBUG, "Importing old style userpic files into the message base");
 127         d = (struct dirent *)malloc(offsetof(struct dirent, d_name) + PATH_MAX + 2);
 128         if (d == NULL) {
 129                 return;
 130         }
 131
 132         filedir = opendir (ctdl_usrpic_dir);
 133         if (filedir == NULL) {
 134                 free(d);
 135                 return;
 136         }
 137         while ((readdir_r(filedir, d, &filedir_entry) == 0) &&
 138                (filedir_entry != NULL))
 139         {
 140 #ifdef _DIRENT_HAVE_D_NAMLEN
 141                 d_namelen = filedir_entry->d_namlen;
 142
 143 #else
 144                 d_namelen = strlen(filedir_entry->d_name);
 145 #endif
 146
 147 #ifdef _DIRENT_HAVE_D_TYPE
 148                 d_type = filedir_entry->d_type;
 149 #else
 150
 151 #ifndef DT_UNKNOWN
 152 #define DT_UNKNOWN     0
 153 #define DT_DIR         4
 154 #define DT_REG         8
 155 #define DT_LNK         10
 156
 157 #define IFTODT(mode)   (((mode) & 0170000) >> 12)
 158 #define DTTOIF(dirtype)        ((dirtype) << 12)
 159 #endif
 160                 d_type = DT_UNKNOWN;
 161 #endif
 162                 if ((d_namelen == 1) &&
 163                     (filedir_entry->d_name[0] == '.'))
 164                         continue;
 165
 166                 if ((d_namelen == 2) &&
 167                     (filedir_entry->d_name[0] == '.') &&
 168                     (filedir_entry->d_name[1] == '.'))
 169                         continue;
 170
 171                 snprintf(path, PATH_MAX, "%s/%s", ctdl_usrpic_dir, filedir_entry->d_name);
 172                 if (d_type == DT_UNKNOWN) {
 173                         if (lstat(path, &s) == 0) {
 174                                 d_type = IFTODT(s.st_mode);
 175                         }
 176                 }
 177                 switch (d_type)
 178                 {
 179                 case DT_DIR:
 180                         break;
 181                 case DT_LNK:
 182                 case DT_REG:
 183                         usernum = atol(filedir_entry->d_name);
 184                         if (CtdlGetUserByNumber(&usbuf, usernum) == 0) {
 185                                 import_one_userpic_file(usbuf.fullname, usernum, path);
 186                         }
 187                 }
 188         }
 189         free(d);
 190         closedir(filedir);
 191         rmdir(ctdl_usrpic_dir);
 192 }
 193
 194
 195
 196 CTDL_MODULE_INIT(image)
 197 {
 198         if (!threading)
 199         {
 200                 import_old_userpic_files();
 201                 CtdlRegisterProtoHook(cmd_dlui, "DLUI", "DownLoad User Image");
 202         }
 203         /* return our module name for the log */
 204         return "image";
 205 }