tools/win32-launcher/downloader.c

   1
   2 #include <stdio.h>
   3 #include <wininet.h>
   4 #include <commctrl.h>
   5
   6 unsigned long
   7 DownloadFile(const char *filename, const char *url, unsigned long size)
   8 {
   9     HINTERNET inet;
  10     HINTERNET connection;
  11     FILE *out;
  12     char buf[1024*10];
  13     char line[1024];
  14     long readBytes;
  15     unsigned long totalBytes = 0;
  16     int error = 0;
  17     HWND dlg;
  18     HWND progress;
  19     HWND label;
  20     MSG msg;
  21
  22 #if defined(GPODDER_GUI)
  23     dlg = CreateDialog(NULL, "PROGRESS", NULL, NULL);
  24
  25     progress = GetDlgItem(dlg, 1);
  26     SendMessage(progress, PBM_SETRANGE, 0, MAKELPARAM(0, 100));
  27
  28     label = GetDlgItem(dlg, 3);
  29     SendMessage(label, WM_SETTEXT, 0, (LPARAM)filename);
  30
  31     label = GetDlgItem(dlg, 4);
  32 #endif
  33
  34     inet = InternetOpen("gpodder-dependency-downloader",
  35             INTERNET_OPEN_TYPE_PRECONFIG,
  36             NULL,
  37             NULL,
  38             0);
  39
  40     connection = InternetOpenUrl(inet,
  41             url,
  42             NULL,
  43             0,
  44             INTERNET_FLAG_NO_AUTH | INTERNET_FLAG_NO_CACHE_WRITE |
  45             INTERNET_FLAG_NO_COOKIES | INTERNET_FLAG_NO_UI,
  46             0);
  47
  48     out = fopen(filename, "wb");
  49     if (out == NULL) {
  50         error = 1;
  51     }
  52
  53     while (out != NULL) {
  54         if (!InternetReadFile(connection,
  55                     buf,
  56                     sizeof(buf),
  57                     &readBytes)) {
  58             error = 1;
  59             break;
  60         }
  61
  62         if (readBytes == 0) {
  63             break;
  64         }
  65
  66         fwrite(buf, readBytes, 1, out);
  67
  68         totalBytes += readBytes;
  69
  70         snprintf(line, sizeof(line), "%.2f / %.2f MB",
  71                 (float)totalBytes / (float)(1024*1024),
  72                 (float)size / (float)(1024*1024));
  73
  74 #if defined(GPODDER_CLI)
  75         fprintf(stderr, "Downloading: %s\r", line);
  76 #endif
  77
  78 #if defined(GPODDER_GUI)
  79         SendMessage(label, WM_SETTEXT,
  80                 0, (LPARAM)TEXT(line));
  81
  82         SendMessage(progress, PBM_SETPOS,
  83                 (int)(100*(float)totalBytes/(float)size), 0);
  84
  85         while (PeekMessage(&msg, dlg, 0, 0, PM_NOREMOVE)) {
  86             if (GetMessage(&msg, NULL, 0, 0) > 0) {
  87                 TranslateMessage(&msg);
  88                 DispatchMessage(&msg);
  89             }
  90         }
  91 #endif
  92     }
  93
  94 #if defined(GPODDER_GUI)
  95     DestroyWindow(dlg);
  96 #endif
  97
  98     fclose(out);
  99     InternetCloseHandle(connection);
 100     InternetCloseHandle(inet);
 101     if (error) {
 102         return 0;
 103     } else {
 104         return totalBytes;
 105     }
 106 }
 107