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 = "packmgr.xml")
  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         else
  48                 strcpy(path, "");
  49
  50
  51         // create the local file name
  52         if(filename)
  53         {
  54                 strcat(path, filename);
  55                 DeleteFileA (path);
  56         }
  57         else
  58                 GetTempFileNameA (path, "pml", 1, path);
  59
  60         // get the url
  61         if (!server)
  62                 strcpy(downl, "");
  63
  64         else if(!strcmp(server, "tree"))
  65         {
  66                 char* ret;
  67                 for (i=0; i<tree->sources.size(); i++)
  68                 {
  69                         ret = PML_Download(tree, url, tree->sources[i], filename);
  70                         if(ret)
  71                                 return ret;
  72                 }
  73                 return NULL;
  74         }
  75
  76         else
  77                 strcpy(downl, server);
  78
  79         strcat(downl, url);
  80
  81         // is this a file link ?
  82         if (strstr(downl, "file://") || strstr(downl, "File://"))
  83         {
  84                 if(!filename)
  85                 {
  86                         return &downl[7];
  87                 }
  88
  89                 else
  90                 {
  91                         CopyFileA(filename, &downl[7], FALSE);
  92                         return (char*)filename;
  93                 }
  94         }
  95
  96
  97         // download the file
  98         if(URLDownloadToFileA (NULL, downl, path, 0, NULL) != S_OK)
  99         {
 100                 Log("!  ERROR: Unable to download ");
 101                 LogAdd(downl);
 102
 103                 return NULL;
 104         }
 105
 106         return path;
 107 }
 108
 109 // Download and prozess a xml file
 110 int PML_XmlDownload (pTree tree, const char* url, void* usrdata,
 111                                                  XML_StartElementHandler start, XML_EndElementHandler end, XML_CharacterDataHandler text)
 112 {
 113         int done = 0;
 114         char buffer[255];
 115         char* filename = 0;
 116
 117         // logging
 118         Log("*  prozess the xml file: ");
 119         LogAdd(url);
 120
 121         // download the file
 122         if(strstr(url, "file://"))
 123                 filename = PML_Download(tree, url, NULL, NULL);
 124
 125         else
 126                 filename = PML_Download(tree, url);
 127
 128
 129         if(!filename)
 130         {
 131                 Log("!  ERROR: Could not download the xml file");
 132                 return ERR_DOWNL;
 133         }
 134
 135         // open the file
 136         FILE* file = fopen(filename, "r");
 137         if(!file)
 138         {
 139                 Log("!  ERROR: Could not open the xml file ");
 140                 LogAdd(filename);
 141                 return ERR_GENERIC;
 142         }
 143
 144         // parse the xml file
 145         XML_Parser parser = XML_ParserCreate(NULL);
 146         XML_SetUserData (parser, usrdata);
 147         XML_SetElementHandler(parser, start, end);
 148         XML_SetCharacterDataHandler(parser, text);
 149
 150         while (!done)
 151         {
 152                 size_t len = fread (buffer, 1, sizeof(buffer), file);
 153                 done = len < sizeof(buffer);
 154
 155                 buffer[len] = 0;
 156                 if(!XML_Parse(parser, buffer, len, done))
 157                 {
 158                         Log("!  ERROR: Could not parse the xml file");
 159                         return ERR_GENERIC;
 160                 }
 161         }
 162
 163         XML_ParserFree(parser);
 164         fclose(file);
 165
 166         return ERR_OK;
 167 }
 168