rosapps/packmgr/lib/download.cpp

   1 ////////////////////////////////////////////////////////
   2 //
   3 // download.cpp
   4 //
   5 // Stuff related to downloading
   6 //
   7 //
   8 // Maarten Bosma, 09.01.2004
   9 // maarten.paul@bosma.de
  10 //
  11 ////////////////////////////////////////////////////////
  12
  13 #include "package.hpp"
  14 #include "expat.h"
  15 #include "log.h"
  16 #include <wine/urlmon.h>
  17
  18 HRESULT WINAPI URLDownloadToFileA(
  19     LPUNKNOWN pCaller,
  20     LPCSTR szURL,
  21     LPCSTR szFileName,
  22     DWORD dwReserved,
  23     LPBINDSTATUSCALLBACK lpfnCB
  24 );
  25
  26 int FindCount (string What, string Where, int start = 0, int end = -1);
  27
  28
  29 // Download a file
  30 char* PML_Download (pTree tree, const char* url, const char* server = "tree", const char* filename = NULL)
  31 {
  32         UINT i;
  33         static char downl [MAX_PATH]; // the full url
  34         static char path [MAX_PATH]; // the full resulting Path
  35
  36         // It goes to the temp folder when no other path is entered (or even compleatly no filename)
  37         // If server == "tree" it will be downloaded from the server speficied in option.xml
  38         // File:// links are possible too
  39
  40         // get temp dir
  41         if(!filename)
  42                 GetTempPathA (200, path);
  43
  44         else if(!strstr(filename, "\\"))
  45                 GetTempPathA (200, path);
  46
  47         // create the local file name
  48         if(filename)
  49         {
  50                 strcat(path, filename);
  51                 DeleteFileA (path);
  52         }
  53         else
  54                 GetTempFileNameA (path, "pml", 0, path);
  55
  56         // get the url
  57         if (!server)
  58                 strcpy(downl, "");
  59
  60         else if(!strcmp(server, "tree"))
  61         {
  62                 char* ret;
  63                 for (i=0; i<tree->sources.size(); i++)
  64                 {
  65                         ret = PML_Download(tree, url, tree->sources[i], filename);
  66                         if(ret)
  67                                 return ret;
  68                 }
  69                 return NULL;
  70         }
  71
  72         else
  73                 strcpy(downl, server);
  74
  75         strcat(downl, url);
  76
  77         // is this a file link ?
  78         if (strstr(downl, "file://") || strstr(downl, "File://"))
  79         {/*
  80                 if(downl[strlen(downl)] == '\')
  81                         downl[strlen(downl)] = '\0';
  82         */
  83                 if(!filename)
  84                         return &downl[7];
  85
  86                 else
  87                 {
  88                         CopyFileA(filename, &downl[7], FALSE);
  89                         return (char*)filename;
  90                 }
  91         }
  92
  93         // download the file
  94         if(URLDownloadToFileA (NULL, downl, path, 0, NULL) != S_OK)
  95         {
  96                 Log("!  ERROR: Unable to download ");
  97                 LogAdd(downl);
  98
  99                 return NULL;
 100         }
 101
 102         return path;
 103 }
 104
 105 // Download and prozess a xml file
 106 int PML_XmlDownload (pTree tree, const char* url, void* usrdata,
 107                                                  XML_StartElementHandler start, XML_EndElementHandler end, XML_CharacterDataHandler text)
 108 {
 109         int done = 0;
 110         char buffer[255];
 111         char* filename = 0;
 112
 113         // logging
 114         Log("*  prozess the xml file: ");
 115         LogAdd(url);
 116
 117         // download the file
 118         if(strstr(url, "file://"))
 119                 filename = PML_Download(tree, url, NULL);
 120
 121         else
 122                 filename = PML_Download(tree, url);
 123
 124
 125         if(!filename)
 126         {
 127                 Log("!  ERROR: Could not download the xml file");
 128                 return ERR_DOWNL;
 129         }
 130
 131         // open the file
 132         FILE* file = fopen(filename, "r");
 133         if(!file)
 134         {
 135         MessageBoxA(0,filename,0,0);
 136                 Log("!  ERROR: Could not open the xml file \"");
 137                 LogAdd(filename);
 138                 return ERR_GENERIC;
 139         }
 140
 141         // parse the xml file
 142         XML_Parser parser = XML_ParserCreate(NULL);
 143         XML_SetUserData (parser, usrdata);
 144         XML_SetElementHandler(parser, start, end);
 145         XML_SetCharacterDataHandler(parser, text);
 146
 147         while (!done)
 148         {
 149                 size_t len = fread (buffer, 1, sizeof(buffer), file);
 150                 done = len < sizeof(buffer);
 151
 152                 buffer[len] = 0;
 153                 if(!XML_Parse(parser, buffer, len, done))
 154                 {
 155                         Log("!  ERROR: Could not parse the xml file");
 156                         return ERR_GENERIC;
 157                 }
 158         }
 159
 160         XML_ParserFree(parser);
 161         fclose(file);
 162
 163         return ERR_OK;
 164 }
 165