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