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   try
 171     CreateDir(GameDir+'/maps/downloads');
 172   except
 173   end;
 174
 175   try
 176     CreateDir(GameDir+'/wads/downloads');
 177   except
 178   end;
 179
 180   resList := TStringList.Create();
 181
 182   try
 183     g_Console_Add(Format(_lc[I_NET_MAP_DL], [FileName]));
 184     e_WriteLog('Downloading map `' + FileName + '` from server', TMsgType.Notify);
 185     g_Game_SetLoadingText(FileName + '...', 0, False);
 186     //MC_SEND_MapRequest();
 187     if (not g_Net_SendMapRequest()) then exit;
 188
 189     FileName := ExtractFileName(FileName);
 190     if (length(FileName) = 0) then FileName := 'fucked_map_wad.wad';
 191     res := g_Net_Wait_MapInfo(tf, resList);
 192     if (res <> 0) then exit;
 193
 194     // find or download a map
 195     result := g_Res_SearchResWad(true{asMap}, tf.diskName, mapHash);
 196     if (length(result) = 0) then
 197     begin
 198       // download map
 199       res := g_Net_RequestResFileInfo(-1{map}, tf);
 200       if (res <> 0) then
 201       begin
 202         e_LogWriteln('error requesting map wad');
 203         result := '';
 204         exit;
 205       end;
 206       fname := GameDir+'/maps/downloads/'+FileName;
 207       try
 208         strm := createDiskFile(fname);
 209       except
 210         e_WriteLog('cannot create map file `'+FileName+'`', TMsgType.Fatal);
 211         result := '';
 212         exit;
 213       end;
 214       tf.diskName := fname;
 215       try
 216         res := g_Net_ReceiveResourceFile(-1{map}, tf, strm);
 217       except
 218         e_WriteLog('error downloading map file `'+FileName+'`', TMsgType.Fatal);
 219         strm.Free;
 220         result := '';
 221         exit;
 222       end;
 223       strm.Free;
 224       if (res <> 0) then
 225       begin
 226         e_WriteLog('error downloading map file `'+FileName+'`', TMsgType.Fatal);
 227         result := '';
 228         exit;
 229       end;
 230       result := fname;
 231     end;
 232
 233     // download resources
 234     for f := 0 to resList.Count-1 do
 235     begin
 236       res := g_Net_RequestResFileInfo(f, tf);
 237       if (res <> 0) then begin result := ''; exit; end;
 238       wadname := g_Res_SearchResWad(false{asMap}, tf.diskName, tf.hash);
 239       if (length(wadname) <> 0) then
 240       begin
 241         // already here
 242         g_Net_AbortResTransfer(tf);
 243         g_Res_PutReplacementWad(tf.diskName, wadname);
 244       end
 245       else
 246       begin
 247         fname := GameDir+'/wads/downloads/'+tf.diskName;
 248         e_LogWritefln('downloading resource `%s` to `%s`...', [tf.diskName, fname]);
 249         try
 250           strm := createDiskFile(fname);
 251         except
 252           e_WriteLog('cannot create resource file `'+fname+'`', TMsgType.Fatal);
 253           result := '';
 254           exit;
 255         end;
 256         try
 257           res := g_Net_ReceiveResourceFile(f, tf, strm);
 258         except
 259           e_WriteLog('error downloading map file `'+FileName+'`', TMsgType.Fatal);
 260           strm.Free;
 261           result := '';
 262           exit;
 263         end;
 264         strm.Free;
 265         if (res <> 0) then
 266         begin
 267           e_WriteLog('error downloading map file `'+FileName+'`', TMsgType.Fatal);
 268           result := '';
 269           exit;
 270         end;
 271         g_Res_PutReplacementWad(tf.diskName, fname);
 272       end;
 273     end;
 274   finally
 275     resList.Free;
 276   end;
 277 end;
 278
 279
 280 end.