geturl.cc

   1 /*
   2
   3
   4  * Copyright (c) 2000, 2001, Red Hat, Inc.
   5  *
   6  *     This program is free software; you can redistribute it and/or modify
   7  *     it under the terms of the GNU General Public License as published by
   8  *     the Free Software Foundation; either version 2 of the License, or
   9  *     (at your option) any later version.
  10  *
  11  *     A copy of the GNU General Public License can be found at
  12  *     http://www.gnu.org/
  13  *
  14  * Written by DJ Delorie <dj@cygnus.com>
  15  *
  16  */
  17
  18 /* The purpose of this file is to act as a pretty interface to
  19    netio.cc.  We add a progress dialog and some convenience functions
  20    (like collect to string or file */
  21
  22 #if 0
  23 static const char *cvsid =
  24   "\n%%% $Id$\n";
  25 #endif
  26
  27 #include "win32.h"
  28 #include "commctrl.h"
  29
  30 #include <stdio.h>
  31 #include <stdlib.h>
  32 #include <errno.h>
  33
  34 #include "dialog.h"
  35 #include "geturl.h"
  36 #include "resource.h"
  37 #include "netio.h"
  38 #include "msg.h"
  39 #include "log.h"
  40 #include "io_stream.h"
  41 #include "io_stream_memory.h"
  42 #include "state.h"
  43 #include "diskfull.h"
  44 #include "mount.h"
  45
  46 #include "threebar.h"
  47
  48 #include "String++.h"
  49
  50 extern ThreeBarProgressPage Progress;
  51
  52 static int max_bytes = 0;
  53 static int is_local_install = 0;
  54
  55 int total_download_bytes = 0;
  56 int total_download_bytes_sofar = 0;
  57
  58 static DWORD start_tics;
  59
  60 static void
  61 init_dialog (String const &url, int length, HWND owner)
  62 {
  63   if (is_local_install)
  64     return;
  65
  66   char const *temp = url.cstr();
  67   char const *sl = temp;
  68   char const *cp;
  69   for (cp = sl; *cp; cp++)
  70     if (*cp == '/' || *cp == '\\' || *cp == ':')
  71       sl = cp + 1;
  72   max_bytes = length;
  73   Progress.SetText1("Downloading...");
  74   Progress.SetText2(sl);
  75   Progress.SetText3("Connecting...");
  76   Progress.SetBar1(0);
  77   start_tics = GetTickCount ();
  78   delete[] temp;
  79 }
  80
  81
  82 static void
  83 progress (int bytes)
  84 {
  85   if (is_local_install)
  86     return;
  87   static char buf[100];
  88   double kbps;
  89   static unsigned int last_tics = 0;
  90   DWORD tics = GetTickCount ();
  91   if (tics == start_tics)       // to prevent division by zero
  92     return;
  93   if (tics < last_tics + 200)   // to prevent flickering updates
  94     return;
  95   last_tics = tics;
  96
  97   kbps = ((double)bytes) / (double)(tics - start_tics);
  98   if (max_bytes > 0)
  99     {
 100       int perc = (int)(100.0 * ((double)bytes) / (double)max_bytes);
 101       Progress.SetBar1(bytes, max_bytes);
 102       sprintf (buf, "%d %%  (%dk/%dk)  %03.1f kb/s\n",
 103                perc, bytes / 1000, max_bytes / 1000, kbps);
 104       if (total_download_bytes > 0)
 105         {
 106       Progress.SetBar2(total_download_bytes_sofar + bytes, total_download_bytes);
 107         }
 108     }
 109   else
 110     sprintf (buf, "%d  %2.1f kb/s\n", bytes, kbps);
 111
 112   Progress.SetText3(buf);
 113 }
 114
 115 io_stream *
 116 get_url_to_membuf (String const &_url, HWND owner)
 117 {
 118   log (LOG_BABBLE, String ("get_url_to_membuf ") + _url);
 119   is_local_install = (source == IDC_SOURCE_CWD);
 120   init_dialog (_url, 0, owner);
 121   NetIO *n = NetIO::open (_url.cstr_oneuse());
 122   if (!n || !n->ok ())
 123     {
 124       delete n;
 125       log (LOG_BABBLE, "get_url_to_membuf failed!");
 126       return 0;
 127     }
 128
 129   if (n->file_size)
 130     max_bytes = n->file_size;
 131
 132   io_stream_memory *membuf = new io_stream_memory ();
 133
 134   int total_bytes = 0;
 135   progress (0);
 136   while (1)
 137     {
 138       char buf[2048];
 139       ssize_t rlen, wlen;
 140       rlen = n->read (buf, 2048);
 141       if (rlen > 0)
 142         {
 143           wlen = membuf->write (buf, rlen);
 144           if (wlen != rlen)
 145             /* FIXME: Show an error message */
 146             break;
 147           total_bytes += rlen;
 148           progress (total_bytes);
 149         }
 150       else
 151         break;
 152     }
 153
 154   if (membuf->seek (0, IO_SEEK_SET))
 155     {
 156       if (n)
 157         delete n;
 158       if (membuf)
 159         delete membuf;
 160       log (LOG_BABBLE, "get_url_to_membuf(): seek (0) failed for membuf!");
 161       return 0;
 162     }
 163
 164   if (n)
 165     delete n;
 166   return membuf;
 167 }
 168
 169 // predicate: url has no '\0''s in it.
 170 String
 171 get_url_to_string (String const &_url, HWND owner)
 172 {
 173   io_stream *stream = get_url_to_membuf (_url, owner);
 174   if (!stream)
 175     return String();
 176   size_t bytes = stream->get_size ();
 177   if (!bytes)
 178     {
 179       /* zero length, or error retrieving length */
 180       delete stream;
 181       log (LOG_BABBLE, "get_url_to_string(): couldn't retrieve buffer size, or zero length buffer");
 182       return String();
 183     }
 184   char temp [bytes + 1];
 185   /* membufs are quite safe */
 186   stream->read (temp, bytes);
 187   temp [bytes] = '\0';
 188   delete stream;
 189   return String(temp);
 190 }
 191
 192 int
 193 get_url_to_file (String const &_url, String const &_filename, int expected_length,
 194                  HWND owner, BOOL allow_ftp_auth)
 195 {
 196   log (LOG_BABBLE, String ("get_url_to_file ") + _url + " " + _filename);
 197   if (total_download_bytes > 0)
 198     {
 199       int df = diskfull (get_root_dir ().cstr_oneuse());
 200       Progress.SetBar3(df);
 201     }
 202   init_dialog (_url, expected_length, owner);
 203
 204   remove (_filename.cstr_oneuse());             /* but ignore errors */
 205
 206   NetIO *n = NetIO::open (_url.cstr_oneuse(), allow_ftp_auth);
 207   if (!n || !n->ok ())
 208     {
 209       delete n;
 210       log (LOG_BABBLE, "get_url_to_file failed!");
 211       return 1;
 212     }
 213
 214   FILE *f = fopen (_filename.cstr_oneuse(), "wb");
 215   if (!f)
 216     {
 217       const char *err = strerror (errno);
 218       if (!err)
 219         err = "(unknown error)";
 220       fatal (owner, IDS_ERR_OPEN_WRITE, _filename.cstr_oneuse(), err);
 221     }
 222
 223   if (n->file_size)
 224     max_bytes = n->file_size;
 225
 226   int total_bytes = 0;
 227   progress (0);
 228   while (1)
 229     {
 230       char buf[8192];
 231       int count;
 232       count = n->read (buf, sizeof (buf));
 233       if (count <= 0)
 234         break;
 235       fwrite (buf, 1, count, f);
 236       total_bytes += count;
 237       progress (total_bytes);
 238     }
 239
 240   total_download_bytes_sofar += total_bytes;
 241
 242   fclose (f);
 243   if (n)
 244     delete n;
 245
 246   if (total_download_bytes > 0)
 247     {
 248       int df = diskfull (get_root_dir ().cstr_oneuse());
 249           Progress.SetBar3(df);
 250     }
 251
 252   return 0;
 253 }
 254