1 | /**********************************************************************
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2 | *
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3 | * startbrowser.cpp
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4 | * Copyright (C) 1999 The New Zealand Digital Library Project
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5 | *
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6 | * A component of the Greenstone digital library software
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7 | * from the New Zealand Digital Library Project at the
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8 | * University of Waikato, New Zealand.
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9 | *
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10 | * This program is free software; you can redistribute it and/or modify
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11 | * it under the terms of the GNU General Public License as published by
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12 | * the Free Software Foundation; either version 2 of the License, or
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13 | * (at your option) any later version.
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14 | *
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15 | * This program is distributed in the hope that it will be useful,
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16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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18 | * GNU General Public License for more details.
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19 | *
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20 | * You should have received a copy of the GNU General Public License
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21 | * along with this program; if not, write to the Free Software
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22 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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23 | *
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24 | *********************************************************************/
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25 |
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26 | #include "startbrowser.h"
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27 | #include <windows.h>
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28 | #include <DDE.H>
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29 | #include <DDEML.H>
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30 | #include <string.h>
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31 | #include <direct.h>
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32 | #include "locate.h"
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33 |
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34 | #define SB_COMLEN 1024
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35 | #define SB_DDETIMEOUT 60000UL // One minute in milliseconds
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36 |
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37 | int numbrowserstarted = 0;
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38 |
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39 | static int inited = 0;
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40 |
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41 | static DWORD idInst = 0;
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42 | static HINSTANCE hinst = NULL;
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43 | static HSZ hszNetscapeName = NULL;
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44 | static HSZ hszIExploreName = NULL;
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45 | static HSZ hszOpenURLTopic = NULL;
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46 | static HSZ hszActivateTopic = NULL;
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47 |
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48 | // budget callback
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49 | HDDEDATA CALLBACK DdeCallback(UINT uType, /* transaction type */
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50 | UINT uFmt, /* clipboard data format */
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51 | HCONV hconv, /* handle of conversation */
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52 | HSZ hsz1, /* handle of string */
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53 | HSZ hsz2, /* handle of string */
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54 | HDDEDATA hdata, /* handle of global memory object */
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55 | DWORD dwData1, /* transaction-specific data */
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56 | DWORD dwData2) /* transaction-specific data */
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57 | {
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58 | return (HDDEDATA) NULL;
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59 | }
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60 |
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61 | // returns 0 on failure
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62 | static int talkdde (HSZ hszServName, HSZ hszSysTopic, char *requeststr) {
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63 | HSZ hszRequest;
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64 | HCONV hConv;
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65 | HDDEDATA result;
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66 |
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67 | // try to connect to the newly started browser
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68 | hConv = DdeConnect (idInst, hszServName, hszSysTopic, (PCONVCONTEXT) NULL);
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69 | if (hConv == NULL) return 0;
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70 |
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71 | hszRequest = DdeCreateStringHandle (idInst, requeststr, CP_WINANSI);
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72 | result = DdeClientTransaction (
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73 | NULL, // pointer to data to pass to server
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74 | 0, // length of data
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75 | hConv, // handle to conversation
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76 | hszRequest, // handle to item name string
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77 | CF_TEXT, // clipboard data format
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78 | XTYP_REQUEST, // transaction type
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79 | SB_DDETIMEOUT, // time-out duration
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80 | NULL // pointer to transaction result
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81 | );
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82 |
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83 | if (result != NULL) DdeFreeDataHandle (result);
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84 | DdeDisconnect(hConv);
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85 | DdeFreeStringHandle (idInst, hszRequest);
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86 |
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87 | return 1;
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88 | }
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89 |
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90 | // returns 0 on failure
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91 | static int openurl(HSZ hszServName, HSZ hszActivateTopic, HSZ hszOpenURLTopic, char *url) {
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92 | char requeststr[65600];
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93 |
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94 | // bring the browser to the front, don't worry if this fails
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95 | talkdde (hszServName, hszActivateTopic, "0xFFFFFFFF,0x0");
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96 |
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97 | // tell the browser to open a url
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98 | strcpy (requeststr, "\"");
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99 | strcat (requeststr, url);
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100 | strcat (requeststr, "\",,0xFFFFFFFF,0x0,,,");
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101 |
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102 | return talkdde (hszServName, hszOpenURLTopic, requeststr);
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103 | }
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104 |
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105 | // returns 0 on failure
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106 | static int tryconnect(HSZ hszServName, HSZ hszSysTopic) {
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107 | // try to connect to a running browser
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108 | HCONV hConv = DdeConnect (idInst, hszServName, hszSysTopic, (PCONVCONTEXT) NULL);
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109 | if (hConv == NULL) return 0;
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110 | DdeDisconnect(hConv);
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111 | return 1;
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112 | }
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113 |
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114 | static void freestrings () {
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115 | // free up any currently allocated strings
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116 | if (hszNetscapeName != NULL) DdeFreeStringHandle (idInst, hszNetscapeName);
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117 | hszNetscapeName = NULL;
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118 | if (hszIExploreName != NULL) DdeFreeStringHandle (idInst, hszIExploreName);
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119 | hszIExploreName = NULL;
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120 | if (hszOpenURLTopic != NULL) DdeFreeStringHandle (idInst, hszOpenURLTopic);
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121 | hszOpenURLTopic = NULL;
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122 | if (hszActivateTopic != NULL) DdeFreeStringHandle (idInst, hszActivateTopic);
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123 | hszActivateTopic = NULL;
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124 | }
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125 |
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126 | static void getbrowserinfo() {
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127 | freestrings();
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128 |
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129 | hszNetscapeName = DdeCreateStringHandle(idInst,"NETSCAPE",CP_WINANSI);
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130 | hszIExploreName = DdeCreateStringHandle(idInst,"IExplore",CP_WINANSI);
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131 |
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132 | hszOpenURLTopic = DdeCreateStringHandle(idInst,"WWW_OpenURL",CP_WINANSI);
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133 | hszActivateTopic = DdeCreateStringHandle(idInst,"WWW_Activate",CP_WINANSI);
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134 | }
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135 |
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136 | // returns SB_NOERROR on success,
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137 | // SB_ALREADYINIT or SB_DDE_FAILINIT on failure
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138 | int initstartbrowser () {
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139 | if (inited) return SB_ALREADYINIT;
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140 |
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141 | // from nstest if(DdeInitialize(&CDDEObject::m_dwidInst, NstestDdeCallBack, APPCLASS_STANDARD, 0ul))
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142 | if (DdeInitialize (&idInst, (PFNCALLBACK) DdeCallback,
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143 | APPCLASS_STANDARD, 0)
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144 | != DMLERR_NO_ERROR) {
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145 | freestrings();
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146 | inited = 0;
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147 | return SB_DDE_FAILINIT;
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148 | }
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149 |
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150 | getbrowserinfo();
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151 |
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152 | inited = 1;
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153 | return SB_NOERROR;
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154 | }
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155 |
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156 |
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157 | // returns SB_NOERROR on success,
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158 | // SB_DDE_FAILDEINIT of failure
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159 | int deinitstartbrowser () {
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160 | // make sure this has been inited
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161 | // not being inited here, however, is not
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162 | // important
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163 | if (!inited) return SB_NOERROR;
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164 | inited = 0;
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165 |
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166 | freestrings();
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167 |
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168 | if (DdeUninitialize(idInst)) return SB_NOERROR;
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169 |
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170 | return SB_DDE_FAILDEINIT;
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171 | }
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172 |
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173 |
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174 | // startbrowser will try to start a browser (or connect to a running browser).
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175 | //
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176 | // Returns SB_NOERROR on success,
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177 | // SB_NOTINITED, SB_FAIL_BADFORMAT, SB_FAIL_NOTFOUND, SB_FAIL_NORESOURCES, or
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178 | // SB_FAILCONNECTBROWSER on failure
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179 | int startbrowser (char *url, char *browser_exe, char *startdir) {
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180 | char newcommand[SB_COMLEN];
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181 | int usingnetscape = 0;
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182 | int usingiexplore = 0;
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183 |
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184 | if (!inited) return SB_NOTINITED; // has to be inited first
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185 |
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186 | // find out which browser we are dealing with
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187 | strcpy (newcommand, browser_exe);
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188 | _strlwr (newcommand);
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189 | if (strstr (newcommand, "netscape.exe") != NULL) {
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190 | // netscape
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191 | usingnetscape = 1;
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192 | } else if (strstr (newcommand, "iexplore.exe") != NULL) {
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193 | // internet explorer
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194 | usingiexplore = 1;
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195 | }
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196 |
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197 | // only try to communicate with a running browser if a startdir
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198 | // is not specified
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199 | if (startdir == NULL) {
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200 | if (usingnetscape && hszNetscapeName != NULL &&
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201 | openurl(hszNetscapeName, hszActivateTopic, hszOpenURLTopic, url)) {
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202 | return SB_NOERROR;
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203 | }
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204 | if (usingiexplore && hszIExploreName != NULL &&
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205 | openurl(hszIExploreName, hszActivateTopic, hszOpenURLTopic, url)) {
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206 | return SB_NOERROR;
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207 | }
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208 | }
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209 |
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210 | strcpy (newcommand, browser_exe);
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211 |
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212 | // don't put the url on the command line for internet explorer
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213 | if (usingiexplore) {
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214 | strcat (newcommand, " -nohome");
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215 |
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216 | } else {
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217 | // will have to put the url on the command line
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218 | strcat (newcommand, " \"");
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219 | strcat (newcommand, url);
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220 | strcat (newcommand, "\"");
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221 | }
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222 |
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223 | // change the working directory (if needed)
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224 | char cwd[1024];
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225 | cwd[0] = '\0';
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226 | if (startdir != NULL) {
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227 | _getcwd(cwd, 1024);
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228 | _chdir(startdir);
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229 | }
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230 |
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231 | // attempt to start the browser
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232 | int res = WinExec(newcommand, SW_SHOW);
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233 |
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234 | // change the working directory back (if needed)
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235 | if (startdir != NULL) _chdir(cwd);
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236 |
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237 | if (res == ERROR_BAD_FORMAT) return SB_FAIL_BADFORMAT;
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238 | if ((res == ERROR_FILE_NOT_FOUND) || (res == ERROR_PATH_NOT_FOUND))
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239 | return SB_FAIL_NOTFOUND;
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240 | if (res <= 31) return SB_FAIL_NORESOURCES;
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241 |
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242 | ++numbrowserstarted;
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243 |
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244 | // if we aren't using iexplore then the url was
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245 | // put on the command line and there is nothing left to do
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246 | if (!usingiexplore) return SB_NOERROR;
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247 |
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248 | // connect to the browser and get it to open a page,
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249 | // time out after 1 minute
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250 | DWORD lastcheck = GetTickCount ();
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251 | while (DiffTickCounts (lastcheck, GetTickCount()) <= 60000) {
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252 | if (usingnetscape && hszNetscapeName != NULL &&
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253 | openurl(hszNetscapeName, hszActivateTopic, hszOpenURLTopic, url)) {
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254 | return SB_NOERROR;
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255 | }
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256 | if (usingiexplore && hszIExploreName != NULL &&
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257 | openurl(hszIExploreName, hszActivateTopic, hszOpenURLTopic, url)) {
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258 | return SB_NOERROR;
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259 | }
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260 | }
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261 |
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262 | // timed out trying to connect to the browser
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263 | return SB_FAILCONNECTBROWSER;
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264 | }
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265 |
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266 | // returns SB_NOERROR on success,
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267 | // SB_NOTINITED, SB_FAILCONNECTBROWSER on failure
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268 | int browserrunning (char *browser_exe) {
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269 | char newcommand[SB_COMLEN];
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270 | if (!inited) return SB_NOTINITED; // has to be inited first
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271 |
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272 | strcpy (newcommand, browser_exe);
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273 | _strlwr (newcommand);
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274 |
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275 | if ((strstr (newcommand, "netscape.exe") != NULL) && (hszNetscapeName != NULL) &&
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276 | tryconnect(hszNetscapeName, hszOpenURLTopic)) {
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277 | // succeeded connecting to netscape
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278 | return SB_NOERROR;
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279 |
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280 | } else if ((strstr (newcommand, "iexplore.exe") != NULL) && (hszIExploreName != NULL) &&
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281 | tryconnect(hszIExploreName, hszOpenURLTopic)) {
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282 | // succeeded connecting to internet explorer
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283 | return SB_NOERROR;
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284 | }
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285 |
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286 | return SB_FAILCONNECTBROWSER;
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287 | }
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