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
  30 // Download a file
  31 char* PML_Download (const char* name, const char* local_name = "packmgr.txt", const char* server = tree_server, BOOL totemp = TRUE)
  32 {
  33         char url [MAX_PATH];
  34         static char path [MAX_PATH];
  35
  36         // get temp dir
  37         if(totemp)
  38                 GetTempPathA (200, path);
  39
  40         // create the local file name
  41         if(local_name)
  42                 strcat(path, local_name);
  43         else
  44                 strcat(path, "tmp.tmp");
  45
  46         // get the url
  47         if(server) strcpy(url, server);
  48         strcat(url, name);
  49
  50         // make sure there is no old file
  51         DeleteFileA (path);
  52
  53         // download the file
  54         if(URLDownloadToFileA (NULL, url, path, 0, NULL) != S_OK)
  55         {
  56                 Log("!  ERROR: Unable to download ");
  57                 LogAdd(url);
  58
  59                 return NULL;
  60         }
  61
  62         return path;
  63 }
  64
  65 // Download and prozess a xml file
  66 int PML_XmlDownload (const char* url, void* usrdata, XML_StartElementHandler start,
  67                                                  XML_EndElementHandler end, XML_CharacterDataHandler text)
  68 {
  69         char buffer[255];
  70         int done = 0;
  71
  72         // logging
  73         Log("*  prozess the xml file: ");
  74         LogAdd(url);
  75
  76         // download the file
  77         char* filename = PML_Download(url);
  78
  79         if(!filename)
  80         {
  81                 Log("!  ERROR: Could not download the xml file");
  82                 return ERR_DOWNL;
  83         }
  84
  85         // open the file
  86         FILE* file = fopen(filename, "r");
  87         if(!file)
  88         {
  89                 Log("!  ERROR: Could not open the xml file");
  90                 return ERR_GENERIC;
  91         }
  92
  93         // parse the xml file
  94         XML_Parser parser = XML_ParserCreate(NULL);
  95         XML_SetUserData (parser, usrdata);
  96         XML_SetElementHandler(parser, start, end);
  97         XML_SetCharacterDataHandler(parser, text);
  98
  99         while (!done)
 100         {
 101                 size_t len = fread (buffer, 1, sizeof(buffer), file);
 102                 done = len < sizeof(buffer);
 103
 104                 buffer[len] = 0;
 105                 if(!XML_Parse(parser, buffer, len, done))
 106                 {
 107                         Log("!  ERROR: Could not parse the xml file");
 108                         return ERR_GENERIC;
 109                 }
 110         }
 111
 112         XML_ParserFree(parser);
 113         fclose(file);
 114
 115         return ERR_OK;
 116 }
 117