src/game/g_res_downloader.pas

   1 (* Copyright (C)  Doom 2D: Forever Developers
   2  *
   3  * This program is free software: you can redistribute it and/or modify
   4  * it under the terms of the GNU General Public License as published by
   5  * the Free Software Foundation, version 3 of the License ONLY.
   6  *
   7  * This program is distributed in the hope that it will be useful,
   8  * but WITHOUT ANY WARRANTY; without even the implied warranty of
   9  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  10  * GNU General Public License for more details.
  11  *
  12  * You should have received a copy of the GNU General Public License
  13  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  14  *)
  15 {$INCLUDE ../shared/a_modes.inc}
  16 unit g_res_downloader;
  17
  18 interface
  19
  20 uses sysutils, Classes, md5, g_net, g_netmsg, g_console, g_main, e_log;
  21
  22 function g_Res_SearchSameWAD(const path, filename: AnsiString; const resMd5: TMD5Digest): AnsiString;
  23
  24 // download map wad from server (if necessary)
  25 // download all required map resource wads too
  26 // returns name of the map wad (relative to mapdir), or empty string on error
  27 function g_Res_DownloadMapWAD (FileName: AnsiString; const mapHash: TMD5Digest): AnsiString;
  28
  29 // call this before downloading a new map from a server
  30 procedure g_Res_ClearReplacementWads ();
  31 // returns original name, or replacement name
  32 function g_Res_FindReplacementWad (oldname: AnsiString): AnsiString;
  33 procedure g_Res_PutReplacementWad (oldname: AnsiString; newDiskName: AnsiString);
  34
  35
  36 implementation
  37
  38 uses g_language, sfs, utils, wadreader, g_game, hashtable;
  39
  40 //const DOWNLOAD_DIR = 'downloads';
  41
  42 var
  43   replacements: THashStrStr = nil;
  44
  45
  46 // call this before downloading a new map from a server
  47 procedure g_Res_ClearReplacementWads ();
  48 begin
  49   if assigned(replacements) then replacements.clear();
  50   e_LogWriteln('cleared replacement wads');
  51 end;
  52
  53
  54 // returns original name, or replacement name
  55 function g_Res_FindReplacementWad (oldname: AnsiString): AnsiString;
  56 var
  57   fn: AnsiString;
  58 begin
  59   result := oldname;
  60   if not assigned(replacements) then exit;
  61   if (replacements.get(toLowerCase1251(ExtractFileName(oldname)), fn)) then result := fn;
  62 end;
  63
  64
  65 procedure g_Res_PutReplacementWad (oldname: AnsiString; newDiskName: AnsiString);
  66 begin
  67   e_LogWritefln('adding replacement wad: oldname=%s; newname=%s', [oldname, newDiskName]);
  68   if not assigned(replacements) then replacements := THashStrStr.Create();
  69   replacements.put(toLowerCase1251(oldname), newDiskName);
  70 end;
  71
  72
  73 function scanDir (dirName: AnsiString; baseName: AnsiString; const resMd5: TMD5Digest): AnsiString;
  74 var
  75   searchResult: TSearchRec;
  76   dfn: AnsiString;
  77   md5: TMD5Digest;
  78   dirs: array of AnsiString;
  79   f: Integer;
  80 begin
  81   result := '';
  82   SetLength(dirs, 0);
  83   if (length(baseName) = 0) then exit;
  84   dirName := IncludeTrailingPathDelimiter(dirName);
  85   e_LogWritefln('scanning dir `%s` for file `%s`...', [dirName, baseName]);
  86
  87   // scan files
  88   if (FindFirst(dirName+'*', faAnyFile, searchResult) <> 0) then exit;
  89   try
  90     repeat
  91       if ((searchResult.Attr and faDirectory) = 0) then
  92       begin
  93         if (isWadNamesEqu(searchResult.Name, baseName)) then
  94         begin
  95           dfn := dirName+searchResult.Name;
  96           if FileExists(dfn) then
  97           begin
  98             e_LogWritefln('  found `%s`...', [dfn]);
  99             md5 := MD5File(dfn);
 100             if MD5Match(md5, resMd5) then
 101             begin
 102               e_LogWritefln('    MATCH `%s`...', [dfn]);
 103               SetLength(dirs, 0);
 104               result := dfn;
 105               exit;
 106             end;
 107           end;
 108         end;
 109       end
 110       else
 111       begin
 112         if (searchResult.Name <> '.') and (searchResult.Name <> '..') then
 113         begin
 114           dfn := dirName+searchResult.Name;
 115           SetLength(dirs, Length(dirs)+1);
 116           dirs[length(dirs)-1] := dfn;
 117         end;
 118       end;
 119     until (FindNext(searchResult) <> 0);
 120   finally
 121     FindClose(searchResult);
 122   end;
 123
 124   // scan subdirs
 125   for f := 0 to High(dirs) do
 126   begin
 127     dfn := dirs[f];
 128     result := scanDir(dfn, baseName, resMd5);
 129     if (length(result) <> 0) then begin SetLength(dirs, 0); exit; end;
 130   end;
 131   SetLength(dirs, 0);
 132 end;
 133
 134
 135 function g_Res_SearchResWad (asMap: Boolean; fname: AnsiString; const resMd5: TMD5Digest): AnsiString;
 136 begin
 137   result := '';
 138   //if not assigned(scannedDirs) then scannedDirs := THashStrInt.Create();
 139   if (asMap) then
 140   begin
 141     result := scanDir(GameDir+'/maps', ExtractFileName(fname), resMd5);
 142   end
 143   else
 144   begin
 145     result := scanDir(GameDir+'/wads', ExtractFileName(fname), resMd5);
 146   end;
 147 end;
 148
 149
 150 function g_Res_SearchSameWAD (const path, filename: AnsiString; const resMd5: TMD5Digest): AnsiString;
 151 begin
 152   result := scanDir(path, filename, resMd5);
 153 end;
 154
 155
 156 function g_Res_DownloadMapWAD (FileName: AnsiString; const mapHash: TMD5Digest): AnsiString;
 157 var
 158   tf: TNetFileTransfer;
 159   resList: TStringList;
 160   f, res: Integer;
 161   strm: TStream;
 162   fname: AnsiString;
 163   wadname: AnsiString;
 164 begin
 165   //SetLength(mapData.ExternalResources, 0);
 166   result := '';
 167   g_Res_ClearReplacementWads();
 168   g_Res_received_map_start := false;
 169
 170   resList := TStringList.Create();
 171
 172   try
 173     g_Console_Add(Format(_lc[I_NET_MAP_DL], [FileName]));
 174     e_WriteLog('Downloading map `' + FileName + '` from server', TMsgType.Notify);
 175     g_Game_SetLoadingText(FileName + '...', 0, False);
 176     //MC_SEND_MapRequest();
 177     if (not g_Net_SendMapRequest()) then exit;
 178
 179     FileName := ExtractFileName(FileName);
 180     if (length(FileName) = 0) then FileName := 'fucked_map_wad.wad';
 181     res := g_Net_Wait_MapInfo(tf, resList);
 182     if (res <> 0) then exit;
 183
 184     // find or download a map
 185     result := g_Res_SearchResWad(true{asMap}, tf.diskName, mapHash);
 186     if (length(result) = 0) then
 187     begin
 188       // download map
 189       res := g_Net_RequestResFileInfo(-1{map}, tf);
 190       if (res <> 0) then
 191       begin
 192         e_LogWriteln('error requesting map wad');
 193         result := '';
 194         exit;
 195       end;
 196       try
 197         CreateDir(GameDir+'/maps/downloads');
 198       except
 199       end;
 200       fname := GameDir+'/maps/downloads/'+FileName;
 201       try
 202         strm := createDiskFile(fname);
 203       except
 204         e_WriteLog('cannot create map file `'+FileName+'`', TMsgType.Fatal);
 205         result := '';
 206         exit;
 207       end;
 208       tf.diskName := fname;
 209       try
 210         res := g_Net_ReceiveResourceFile(-1{map}, tf, strm);
 211       except
 212         e_WriteLog('error downloading map file `'+FileName+'`', TMsgType.Fatal);
 213         strm.Free;
 214         result := '';
 215         exit;
 216       end;
 217       strm.Free;
 218       if (res <> 0) then
 219       begin
 220         e_WriteLog('error downloading map file `'+FileName+'`', TMsgType.Fatal);
 221         result := '';
 222         exit;
 223       end;
 224       result := fname;
 225     end;
 226
 227     // download resources
 228     for f := 0 to resList.Count-1 do
 229     begin
 230       res := g_Net_RequestResFileInfo(f, tf);
 231       if (res <> 0) then begin result := ''; exit; end;
 232       wadname := g_Res_SearchResWad(false{asMap}, tf.diskName, tf.hash);
 233       if (length(wadname) <> 0) then
 234       begin
 235         // already here
 236         g_Net_AbortResTransfer(tf);
 237         g_Res_PutReplacementWad(tf.diskName, wadname);
 238       end
 239       else
 240       begin
 241         try
 242           CreateDir(GameDir+'/wads/downloads');
 243         except
 244         end;
 245         fname := GameDir+'/wads/downloads/'+tf.diskName;
 246         e_LogWritefln('downloading resource `%s` to `%s`...', [tf.diskName, fname]);
 247         try
 248           strm := createDiskFile(fname);
 249         except
 250           e_WriteLog('cannot create resource file `'+fname+'`', TMsgType.Fatal);
 251           result := '';
 252           exit;
 253         end;
 254         try
 255           res := g_Net_ReceiveResourceFile(f, tf, strm);
 256         except
 257           e_WriteLog('error downloading map file `'+FileName+'`', TMsgType.Fatal);
 258           strm.Free;
 259           result := '';
 260           exit;
 261         end;
 262         strm.Free;
 263         if (res <> 0) then
 264         begin
 265           e_WriteLog('error downloading map file `'+FileName+'`', TMsgType.Fatal);
 266           result := '';
 267           exit;
 268         end;
 269         g_Res_PutReplacementWad(tf.diskName, fname);
 270       end;
 271     end;
 272   finally
 273     resList.Free;
 274   end;
 275 end;
 276
 277
 278 end.