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 #include "win32.h"
  23 #include "commctrl.h"
  24
  25 #include <stdio.h>
  26 #include <stdlib.h>
  27 #include <errno.h>
  28
  29 #include "dialog.h"
  30 #include "geturl.h"
  31 #include "resource.h"
  32 #include "netio.h"
  33 #include "msg.h"
  34 #include "io_stream.h"
  35 #include "io_stream_memory.h"
  36 #include "state.h"
  37 #include "diskfull.h"
  38 #include "mount.h"
  39 #include "filemanip.h"
  40
  41 #include "threebar.h"
  42
  43 #include "Exception.h"
  44
  45 #include "LogSingleton.h"
  46
  47 extern ThreeBarProgressPage Progress;
  48
  49 static int max_bytes = 0;
  50 static int is_local_install = 0;
  51
  52 long long int total_download_bytes = 0;
  53 long long int total_download_bytes_sofar = 0;
  54
  55 static DWORD start_tics;
  56
  57 static void
  58 init_dialog (const std::string &url, int length)
  59 {
  60   if (is_local_install)
  61     return;
  62
  63   std::string::size_type divide = url.find_last_of('/');
  64   max_bytes = length;
  65   Progress.SetText1(IDS_PROGRESS_DOWNLOADING);
  66   Progress.SetText2((url.substr(divide + 1) + " from "
  67                      + url.substr(0, divide)).c_str());
  68   Progress.SetText3(IDS_PROGRESS_CONNECTING);
  69   Progress.SetBar1(0);
  70   start_tics = GetTickCount ();
  71 }
  72
  73
  74 static void
  75 progress (int bytes)
  76 {
  77   if (is_local_install)
  78     return;
  79   static char buf[100];
  80   double kbps;
  81   static unsigned int last_tics = 0;
  82   DWORD tics = GetTickCount ();
  83   if (tics == start_tics)       // to prevent division by zero
  84     return;
  85   if (tics < last_tics + 200)   // to prevent flickering updates
  86     return;
  87   last_tics = tics;
  88
  89   kbps = ((double)bytes) / (double)(tics - start_tics);
  90   if (max_bytes > 0)
  91     {
  92       int perc = (int)(100.0 * ((double)bytes) / (double)max_bytes);
  93       Progress.SetBar1(bytes, max_bytes);
  94       sprintf (buf, "%d %%  (%dk/%dk)  %03.1f kB/s",
  95                perc, bytes / 1000, max_bytes / 1000, kbps);
  96       if (total_download_bytes > 0)
  97           Progress.SetBar2(total_download_bytes_sofar + bytes,
  98                            total_download_bytes);
  99     }
 100   else
 101     sprintf (buf, "%d  %2.1f kB/s", bytes, kbps);
 102
 103   Progress.SetText3(buf);
 104 }
 105
 106 static void
 107 getUrlToStream (const std::string &_url, io_stream *output)
 108 {
 109   is_local_install = (source == IDC_SOURCE_LOCALDIR);
 110   init_dialog (_url, 0);
 111   NetIO *n = NetIO::open (_url.c_str(), true);
 112   if (!n || !n->ok ())
 113     {
 114       delete n;
 115       throw new Exception (TOSTRING(__LINE__) " " __FILE__, "Error opening url",  APPERR_IO_ERROR);
 116     }
 117
 118   if (n->file_size)
 119     max_bytes = n->file_size;
 120
 121   int total_bytes = 0;
 122   progress (0);
 123   while (1)
 124     {
 125       char buf[2048];
 126       ssize_t rlen, wlen;
 127       rlen = n->read (buf, 2048);
 128       if (rlen > 0)
 129         {
 130           wlen = output->write (buf, rlen);
 131           if (wlen != rlen)
 132             /* FIXME: Show an error message */
 133             break;
 134           total_bytes += rlen;
 135           progress (total_bytes);
 136         }
 137       else
 138         break;
 139     }
 140   if (n)
 141     delete (n);
 142   /* reseeking is up to the recipient if desired */
 143
 144   Log (LOG_BABBLE) << "Fetched URL: " << _url << endLog;
 145 }
 146
 147 io_stream *
 148 get_url_to_membuf (const std::string &_url, HWND owner)
 149 {
 150   io_stream_memory *membuf = new io_stream_memory ();
 151   try
 152     {
 153       getUrlToStream (_url, membuf);
 154
 155       if (membuf->seek (0, IO_SEEK_SET))
 156         {
 157           if (membuf)
 158               delete membuf;
 159           Log (LOG_BABBLE) << "get_url_to_membuf(): seek (0) failed for membuf!" << endLog;
 160           return 0;
 161         }
 162       return membuf;
 163     }
 164   catch (Exception *e)
 165     {
 166       if (e->errNo() != APPERR_IO_ERROR)
 167         throw e;
 168       delete membuf;
 169       return 0;
 170     }
 171 }
 172
 173 // predicate: url has no '\0''s in it.
 174 std::string
 175 get_url_to_string (const std::string &_url, HWND owner)
 176 {
 177   io_stream *stream = get_url_to_membuf (_url, owner);
 178   if (!stream)
 179     return std::string();
 180   size_t bytes = stream->get_size ();
 181   if (!bytes)
 182     {
 183       /* zero length, or error retrieving length */
 184       delete stream;
 185       Log (LOG_BABBLE) << "get_url_to_string(): couldn't retrieve buffer size, or zero length buffer" << endLog;
 186       return std::string();
 187     }
 188   char temp [bytes + 1];
 189   /* membufs are quite safe */
 190   stream->read (temp, bytes);
 191   temp [bytes] = '\0';
 192   delete stream;
 193   return std::string(temp);
 194 }
 195
 196 int
 197 get_url_to_file (const std::string &_url,
 198                  const std::string &_filename,
 199                  int expected_length,
 200                  HWND owner)
 201 {
 202   Log (LOG_BABBLE) << "get_url_to_file " << _url << " " << _filename << endLog;
 203   if (total_download_bytes > 0)
 204     {
 205       int df = diskfull (get_root_dir ().c_str());
 206       Progress.SetBar3(df);
 207     }
 208   init_dialog (_url, expected_length);
 209
 210   remove (_filename.c_str());           /* but ignore errors */
 211
 212   NetIO *n = NetIO::open (_url.c_str(), false);
 213   if (!n || !n->ok ())
 214     {
 215       delete n;
 216       return 1;
 217     }
 218
 219   FILE *f = nt_fopen (_filename.c_str(), "wb");
 220   if (!f)
 221     {
 222       const char *err = strerror (errno);
 223       if (!err)
 224         err = "(unknown error)";
 225       fatal (owner, IDS_ERR_OPEN_WRITE, _filename.c_str(), err);
 226     }
 227
 228   if (n->file_size)
 229     max_bytes = n->file_size;
 230
 231   int total_bytes = 0;
 232   progress (0);
 233   while (1)
 234     {
 235       char buf[8192];
 236       int count;
 237       count = n->read (buf, sizeof (buf));
 238       if (count <= 0)
 239         break;
 240       fwrite (buf, 1, count, f);
 241       total_bytes += count;
 242       progress (total_bytes);
 243     }
 244
 245   total_download_bytes_sofar += total_bytes;
 246
 247   fclose (f);
 248   if (n)
 249     delete n;
 250
 251   if (total_download_bytes > 0)
 252     {
 253       int df = diskfull (get_root_dir ().c_str());
 254           Progress.SetBar3(df);
 255     }
 256
 257   return 0;
 258 }
 259