nio-ie5.cc

   1 /*
   2  * Copyright (c) 2000, Red Hat, Inc.
   3  *
   4  *     This program is free software; you can redistribute it and/or modify
   5  *     it under the terms of the GNU General Public License as published by
   6  *     the Free Software Foundation; either version 2 of the License, or
   7  *     (at your option) any later version.
   8  *
   9  *     A copy of the GNU General Public License can be found at
  10  *     http://www.gnu.org/
  11  *
  12  * Written by DJ Delorie <dj@cygnus.com>
  13  *
  14  */
  15
  16 /* The purpose of this file is to manage internet downloads using the
  17    Internet Explorer version 5 DLLs.  To use this method, the user
  18    must already have installed and configured IE5.  This module is
  19    called from netio.cc, which is called from geturl.cc */
  20
  21 static char *cvsid = "\n%%% $Id$\n";
  22
  23 #include "win32.h"
  24
  25 #include "resource.h"
  26 #include "state.h"
  27 #include "dialog.h"
  28 #include "msg.h"
  29 #include "netio.h"
  30 #include "nio-ie5.h"
  31
  32 static HINTERNET internet = 0;
  33
  34 NetIO_IE5::NetIO_IE5 (char *_url)
  35   : NetIO (_url)
  36 {
  37   int resend = 0;
  38
  39   if (internet == 0)
  40     {
  41       HINSTANCE h = LoadLibrary ("wininet.dll");
  42       if (!h)
  43         {
  44           note (IDS_WININET);
  45           connection = 0;
  46           return;
  47         }
  48       InternetAttemptConnect (0);
  49       internet = InternetOpen ("Cygwin Setup", INTERNET_OPEN_TYPE_PRECONFIG,
  50                                NULL, NULL, 0);
  51     }
  52
  53   DWORD flags =
  54     INTERNET_FLAG_DONT_CACHE |
  55     INTERNET_FLAG_KEEP_CONNECTION |
  56     INTERNET_FLAG_PRAGMA_NOCACHE |
  57     INTERNET_FLAG_RELOAD |
  58     INTERNET_FLAG_EXISTING_CONNECT |
  59     INTERNET_FLAG_PASSIVE;
  60
  61   connection = InternetOpenUrl (internet, url, NULL, 0, flags, 0);
  62
  63  try_again:
  64
  65   if (net_user && net_passwd)
  66     {
  67       InternetSetOption (connection, INTERNET_OPTION_USERNAME,
  68                          net_user, strlen (net_user));
  69       InternetSetOption (connection, INTERNET_OPTION_PASSWORD,
  70                          net_passwd, strlen (net_passwd));
  71     }
  72
  73   if (net_proxy_user && net_proxy_passwd)
  74     {
  75       InternetSetOption (connection, INTERNET_OPTION_PROXY_USERNAME,
  76                          net_proxy_user, strlen (net_proxy_user));
  77       InternetSetOption (connection, INTERNET_OPTION_PROXY_PASSWORD,
  78                          net_proxy_passwd, strlen (net_proxy_passwd));
  79     }
  80
  81   if (resend)
  82     if (!HttpSendRequest (connection, 0, 0, 0, 0))
  83       connection = 0;
  84
  85   if (!connection)
  86     {
  87       if (GetLastError () == ERROR_INTERNET_EXTENDED_ERROR)
  88         {
  89           char buf[2000];
  90           DWORD e, l=sizeof (buf);
  91           InternetGetLastResponseInfo (&e, buf, &l);
  92           MessageBox (0, buf, "Internet Error", 0);
  93         }
  94     }
  95
  96   DWORD type, type_s;
  97   type_s = sizeof (type);
  98   InternetQueryOption (connection, INTERNET_OPTION_HANDLE_TYPE,
  99                        &type, &type_s);
 100
 101   switch (type)
 102     {
 103     case INTERNET_HANDLE_TYPE_HTTP_REQUEST:
 104     case INTERNET_HANDLE_TYPE_CONNECT_HTTP:
 105       type_s = sizeof (DWORD);
 106       if (HttpQueryInfo (connection,
 107                          HTTP_QUERY_STATUS_CODE | HTTP_QUERY_FLAG_NUMBER,
 108                          &type, &type_s, NULL))
 109         {
 110           if (type == 401) /* authorization required */
 111             {
 112               flush_io();
 113               get_auth ();
 114               resend = 1;
 115               goto try_again;
 116             }
 117           else if (type == 407) /* proxy authorization required */
 118             {
 119               flush_io();
 120               get_proxy_auth ();
 121               resend = 1;
 122               goto try_again;
 123             }
 124           else if (type >= 300)
 125             {
 126               connection = 0;
 127               return;
 128             }
 129         }
 130     }
 131 }
 132
 133 void
 134 NetIO_IE5::flush_io ()
 135 {
 136   DWORD actual = 0;
 137   char buf[1024];
 138   do {
 139     InternetReadFile (connection, buf, 1024, &actual);
 140   } while (actual > 0);
 141 }
 142
 143 NetIO_IE5::~NetIO_IE5 ()
 144 {
 145   if (connection)
 146     InternetCloseHandle (connection);
 147 }
 148
 149 int
 150 NetIO_IE5::ok ()
 151 {
 152   return (connection == NULL) ? 0 : 1;
 153 }
 154
 155 int
 156 NetIO_IE5::read (char *buf, int nbytes)
 157 {
 158   DWORD actual;
 159   if (InternetReadFile (connection, buf, nbytes, &actual))
 160     return actual;
 161   return -1;
 162 }