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 // Server there all the files lie
  19 const char* tree_server = "http://svn.reactos.com/viewcvs/*checkout*/trunk/rosapps/packmgr/tree/";
  20
  21 HRESULT WINAPI URLDownloadToFileA(
  22     LPUNKNOWN pCaller,
  23     LPCSTR szURL,
  24     LPCSTR szFileName,
  25     DWORD dwReserved,
  26     LPBINDSTATUSCALLBACK lpfnCB
  27 );
  28
  29 int FindCount (string What, string Where, int start = 0, int end = -1);
  30
  31
  32 // Download a file
  33 char* PML_Download (const char* url, const char* server = "tree", const char* filename = NULL)
  34 {
  35         char downl [MAX_PATH];
  36         static char path [MAX_PATH];
  37
  38         // get temp dir
  39         if(!filename)
  40                 GetTempPathA (200, path);
  41
  42         else if(!strstr(filename, "\\"))
  43                 GetTempPathA (200, path);
  44
  45         // create the local file name
  46         if(filename)
  47         {
  48                 strcat(path, filename);
  49                 DeleteFileA (path);
  50         }
  51         else
  52                 GetTempFileNameA (path, "pml", 0, path);
  53
  54         // get the url
  55
  56         if (!server)
  57                 strcpy(downl, "");
  58
  59         else if(!strcmp(server, "tree"))
  60                 strcpy(downl, tree_server);
  61
  62         else
  63                 strcpy(downl, server);
  64
  65         strcat(downl, url);
  66
  67         // download the file
  68         if(URLDownloadToFileA (NULL, downl, path, 0, NULL) != S_OK)
  69         {
  70                 Log("!  ERROR: Unable to download ");
  71                 LogAdd(downl);
  72
  73                 return NULL;
  74         }
  75
  76         return path;
  77 }
  78
  79 // Download and prozess a xml file
  80 int PML_XmlDownload (const char* url, void* usrdata, XML_StartElementHandler start,
  81                                                  XML_EndElementHandler end, XML_CharacterDataHandler text)
  82 {
  83         char buffer[255];
  84         int done = 0;
  85
  86         // logging
  87         Log("*  prozess the xml file: ");
  88         LogAdd(url);
  89
  90         // download the file
  91         char* filename = PML_Download(url);
  92
  93         if(!filename)
  94         {
  95                 Log("!  ERROR: Could not download the xml file");
  96                 return ERR_DOWNL;
  97         }
  98
  99         // open the file
 100         FILE* file = fopen(filename, "r");
 101         if(!file)
 102         {
 103                 Log("!  ERROR: Could not open the xml file");
 104                 return ERR_GENERIC;
 105         }
 106
 107         // parse the xml file
 108         XML_Parser parser = XML_ParserCreate(NULL);
 109         XML_SetUserData (parser, usrdata);
 110         XML_SetElementHandler(parser, start, end);
 111         XML_SetCharacterDataHandler(parser, text);
 112
 113         while (!done)
 114         {
 115                 size_t len = fread (buffer, 1, sizeof(buffer), file);
 116                 done = len < sizeof(buffer);
 117
 118                 buffer[len] = 0;
 119                 if(!XML_Parse(parser, buffer, len, done))
 120                 {
 121                         Log("!  ERROR: Could not parse the xml file");
 122                         return ERR_GENERIC;
 123                 }
 124         }
 125
 126         XML_ParserFree(parser);
 127         fclose(file);
 128
 129         return ERR_OK;
 130 }
 131