1 | /**********************************************************************
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2 | *
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3 | * cgiwrapper.cpp -- output pages using the cgi protocol
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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 | * $Id: cgiwrapper.cpp 872 2000-01-25 22:45:59Z sjboddie $
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25 | *
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26 | *********************************************************************/
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27 |
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28 | /*
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29 | $Log$
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30 | Revision 1.21 2000/01/25 22:45:59 sjboddie
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31 | few changes to get fastcgi to work properly
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32 |
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33 | Revision 1.20 1999/09/07 04:56:53 sjboddie
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34 | added GPL notice
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35 |
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36 | Revision 1.19 1999/09/02 00:24:36 rjmcnab
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37 | fixed bug in getting POST arguments
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38 |
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39 | Revision 1.18 1999/08/20 01:02:07 sjboddie
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40 | added some usage logging
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41 |
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42 | Revision 1.17 1999/07/15 06:03:15 rjmcnab
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43 | Moved the adding of the actions to librarymain so that they can be
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44 | overriden easily.
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45 |
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46 | Revision 1.16 1999/07/14 08:31:05 rjmcnab
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47 | Fixed a small bug in the POST implementation.
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48 |
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49 | Revision 1.15 1999/07/13 23:32:17 rjmcnab
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50 | Added authenaction and usersaction
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51 |
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52 | Revision 1.14 1999/07/11 01:03:37 rjmcnab
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53 | Added ability to receive POST cgi form data.
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54 |
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55 | Revision 1.13 1999/06/24 05:12:18 sjboddie
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56 | lots of small changes
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57 |
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58 | Revision 1.12 1999/04/30 01:59:40 sjboddie
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59 | lots of stuff - getting documentaction working (documentaction replaces
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60 | old browseaction)
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61 |
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62 | Revision 1.11 1999/03/25 03:12:01 sjboddie
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63 |
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64 | subjectbrowseaction was replaced with browseaction
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65 |
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66 | Revision 1.10 1999/03/05 03:53:54 sjboddie
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67 |
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68 | fixed some bugs
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69 |
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70 | Revision 1.9 1999/03/04 22:38:21 sjboddie
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71 |
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72 | Added subjectbrowseaction. - Doesn't do anything yet.
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73 |
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74 | Revision 1.8 1999/02/28 20:00:13 rjmcnab
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75 |
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76 |
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77 | Fixed a few things.
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78 |
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79 | Revision 1.7 1999/02/21 22:33:53 rjmcnab
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80 |
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81 | Lots of stuff :-)
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82 |
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83 | Revision 1.6 1999/02/12 02:40:17 sjboddie
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84 |
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85 | Added page action
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86 |
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87 | Revision 1.5 1999/02/11 01:24:04 rjmcnab
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88 |
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89 | Fixed a few compiler warnings.
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90 |
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91 | Revision 1.4 1999/02/08 01:28:01 rjmcnab
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92 |
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93 | Got the receptionist producing something using the statusaction.
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94 |
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95 | Revision 1.3 1999/02/05 10:42:44 rjmcnab
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96 |
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97 | Continued working on receptionist
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98 |
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99 | Revision 1.2 1999/02/04 10:00:56 rjmcnab
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100 |
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101 | Developed the idea of an "action" and having them define the cgi arguments
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102 | which they need and how those cgi arguments function.
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103 |
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104 | Revision 1.1 1999/02/04 01:16:17 rjmcnab
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105 |
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106 | Initial revision.
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107 |
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108 | Revision 1.5 1999/01/19 01:38:18 rjmcnab
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109 |
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110 | Made the source more portable.
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111 |
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112 | Revision 1.4 1999/01/12 01:51:04 rjmcnab
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113 |
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114 | Standard header.
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115 |
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116 | */
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117 |
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118 |
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119 | #include "gsdlconf.h"
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120 | #include "cgiwrapper.h"
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121 | #include "recptconfig.h"
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122 | #include <stdlib.h>
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123 | #include <assert.h>
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124 |
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125 |
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126 | // get GSDL_GSDLHOME
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127 | #include "gsdlhome.h"
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128 |
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129 |
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130 | #if defined(GSDL_USE_OBJECTSPACE)
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131 | # include <ospace/std/iostream>
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132 | # include <ospace/std/fstream>
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133 | #elif defined(GSDL_USE_IOS_H)
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134 | # include <iostream.h>
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135 | # include <fstream.h>
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136 | #else
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137 | # include <iostream>
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138 | # include <fstream>
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139 | #endif
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140 |
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141 | #ifdef USE_FASTCGI
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142 | #include "fcgiapp.h"
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143 | #endif
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144 |
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145 |
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146 | #ifdef USE_FASTCGI
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147 | // used to output the text from receptionist
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148 | class fcgistreambuf : public streambuf {
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149 | public:
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150 | fcgistreambuf ();
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151 | int sync ();
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152 | int overflow (int ch);
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153 | int underflow () {return EOF;}
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154 |
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155 | void fcgisbreset() {fcgx_stream = NULL; other_ostream = NULL;};
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156 | void set_fcgx_stream(FCGX_Stream *newone) {fcgx_stream=newone;};
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157 | void set_other_ostream(ostream *newone) {other_ostream=newone;};
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158 |
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159 | private:
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160 | FCGX_Stream *fcgx_stream;
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161 | ostream *other_ostream;
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162 | };
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163 |
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164 | fcgistreambuf::fcgistreambuf() {
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165 | fcgisbreset();
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166 | if (base() == ebuf()) allocate();
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167 | setp (base(), ebuf());
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168 | };
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169 |
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170 | int fcgistreambuf::sync () {
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171 | if ((fcgx_stream != NULL) &&
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172 | (FCGX_PutStr (pbase(), out_waiting(), fcgx_stream) < 0)) {
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173 | fcgx_stream = NULL;
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174 | }
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175 |
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176 | if (other_ostream != NULL) {
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177 | char *thepbase=pbase();
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178 | for (int i=0;i<out_waiting();i++) (*other_ostream).put(thepbase[i]);
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179 | }
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180 |
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181 | setp (pbase(), epptr());
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182 |
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183 | return 0;
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184 | }
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185 |
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186 | int fcgistreambuf::overflow (int ch) {
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187 | if (sync () == EOF) return EOF;
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188 | if (ch != EOF) sputc (ch);
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189 | return 0;
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190 | }
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191 |
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192 | #endif
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193 |
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194 |
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195 | static void page_errorsitecfg (const text_t &gsdlhome, const text_t &collection,
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196 | text_t &errorpage) {
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197 | errorpage += "Content-type: text/html\n\n";
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198 |
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199 | errorpage += "<html>\n";
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200 | errorpage += "<head>\n";
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201 | errorpage += "<title>Error</title>\n";
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202 | errorpage += "</head>\n";
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203 | errorpage += "<body>\n";
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204 | errorpage += "<h2>Oops!</h2>\n";
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205 | errorpage += "The site.cfg configuration file could not be found. This file\n";
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206 | errorpage += "should contain configuration information relating to this\n";
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207 | errorpage += "site's setup. ";
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208 | if (collection.empty()) {
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209 | errorpage += "As this cgi script is not being run in collection specific mode,\n";
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210 | errorpage += "the file should reside at ";
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211 | errorpage += gsdlhome;
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212 | errorpage += "/etc/site.cfg.\n";
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213 | } else {
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214 | errorpage += "As this cgi script is being run in collection specific mode,\n";
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215 | errorpage += "the file can reside in ";
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216 | errorpage += gsdlhome;
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217 | errorpage += "/collect/";
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218 | errorpage += collection;
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219 | errorpage += "/etc/site.cfg or ";
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220 | errorpage += gsdlhome;
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221 | errorpage += "/etc/site.cfg.\n";
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222 | }
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223 | errorpage += "</body>\n";
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224 | errorpage += "</html>\n";
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225 | }
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226 |
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227 |
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228 | static void page_errormaincfg (const text_t &gsdlhome, const text_t &collection,
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229 | text_t &errorpage) {
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230 | errorpage += "Content-type: text/html\n\n";
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231 |
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232 | errorpage += "<html>\n";
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233 | errorpage += "<head>\n";
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234 | errorpage += "<title>Error</title>\n";
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235 | errorpage += "</head>\n";
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236 | errorpage += "<body>\n";
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237 | errorpage += "<h2>Oops!</h2>\n";
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238 | if (collection.empty()) {
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239 | errorpage += "The main.cfg configuration file could not be found. This file\n";
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240 | errorpage += "should contain configuration information relating to the\n";
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241 | errorpage += "setup of the interface. As this cgi script is not being run\n";
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242 | errorpage += "in collection specific mode the file should reside at\n";
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243 | errorpage += gsdlhome;
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244 | errorpage += "/etc/main.cfg.\n";
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245 | } else {
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246 | errorpage += "Neither the collect.cfg or main.cfg configuration files could\n";
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247 | errorpage += "not be found. This file should contain configuration information\n";
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248 | errorpage += "relating to the setup of the interface. As this cgi script is\n";
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249 | errorpage += "being run in collection specific mode the file should reside\n";
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250 | errorpage += "at either ";
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251 | errorpage += gsdlhome;
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252 | errorpage += "/collect/";
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253 | errorpage += collection;
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254 | errorpage += "/etc/collect.cfg, ";
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255 | errorpage += gsdlhome;
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256 | errorpage += "/etc/collect.cfg or ";
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257 | errorpage += gsdlhome;
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258 | errorpage += "/etc/main.cfg.\n";
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259 | }
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260 | errorpage += "</body>\n";
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261 | errorpage += "</html>\n";
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262 | }
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263 |
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264 |
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265 | static void page_errorinit (const text_t &/*gsdlhome*/, text_t &errorpage) {
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266 | errorpage += "Content-type: text/html\n\n";
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267 |
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268 | errorpage += "<html>\n";
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269 | errorpage += "<head>\n";
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270 | errorpage += "<title>Error</title>\n";
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271 | errorpage += "</head>\n";
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272 | errorpage += "<body>\n";
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273 | errorpage += "<h2>Oops!</h2>\n";
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274 | errorpage += "An error occurred during the initialisation of the Greenstone Digital\n";
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275 | errorpage += "Library software. It is likely that the software has not been setup\n";
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276 | errorpage += "correctly.\n";
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277 |
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278 | ifstream initin (GSDL_GSDLHOME "/etc/initout.txt");
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279 | if (initin) {
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280 | errorpage += "The initialisation error log, " GSDL_GSDLHOME "/etc/initout.txt, contains the\n";
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281 | errorpage += "following information:\n\n";
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282 | errorpage += "<pre>\n";
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283 |
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284 | char c;
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285 | initin.get(c);
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286 | while (!initin.eof ()) {
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287 | errorpage.push_back(c);
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288 | initin.get(c);
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289 | }
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290 |
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291 | errorpage += "</pre>\n";
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292 |
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293 | initin.close();
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294 |
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295 | } else {
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296 | errorpage += "Please consult " GSDL_GSDLHOME "/etc/initout.txt for more information.\n";
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297 | }
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298 |
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299 | errorpage += "</body>\n";
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300 | errorpage += "</html>\n";
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301 | }
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302 |
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303 | static void page_errorparseargs (const text_t &/*gsdlhome*/, text_t &errorpage) {
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304 | errorpage += "Content-type: text/html\n\n";
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305 |
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306 | errorpage += "<html>\n";
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307 | errorpage += "<head>\n";
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308 | errorpage += "<title>Error</title>\n";
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309 | errorpage += "</head>\n";
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310 | errorpage += "<body>\n";
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311 | errorpage += "<h2>Oops!</h2>\n";
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312 | errorpage += "An error occurred during the parsing of the cgi arguments.\n";
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313 |
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314 | ifstream errin (GSDL_GSDLHOME "/etc/errout.txt");
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315 | if (errin) {
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316 | errorpage += "The error log, " GSDL_GSDLHOME "/etc/errout.txt, contains the\n";
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317 | errorpage += "following information:\n\n";
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318 | errorpage += "<pre>\n";
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319 |
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320 | char c;
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321 | errin.get(c);
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322 | while (!errin.eof ()) {
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323 | errorpage.push_back(c);
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324 | errin.get(c);
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325 | }
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326 | errorpage += "</pre>\n";
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327 | errin.close();
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328 |
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329 | } else {
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330 | errorpage += "Please consult " GSDL_GSDLHOME "/etc/errout.txt for more information.\n";
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331 | }
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332 |
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333 | errorpage += "</body>\n";
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334 | errorpage += "</html>\n";
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335 | }
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336 |
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337 | static void page_errorcgipage (const text_t &/*gsdlhome*/, text_t &errorpage) {
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338 | errorpage += "Content-type: text/html\n\n";
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339 |
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340 | errorpage += "<html>\n";
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341 | errorpage += "<head>\n";
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342 | errorpage += "<title>Error</title>\n";
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343 | errorpage += "</head>\n";
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344 | errorpage += "<body>\n";
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345 | errorpage += "<h2>Oops!</h2>\n";
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346 | errorpage += "An error occurred during the construction of the cgi page.\n";
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347 |
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348 | ifstream errin (GSDL_GSDLHOME "/etc/errout.txt");
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349 | if (errin) {
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350 | errorpage += "The error log, " GSDL_GSDLHOME "/etc/errout.txt, contains the\n";
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351 | errorpage += "following information:\n\n";
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352 | errorpage += "<pre>\n";
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353 |
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354 | char c;
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355 | errin.get(c);
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356 | while (!errin.eof ()) {
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357 | errorpage.push_back(c);
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358 | errin.get(c);
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359 | }
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360 | errorpage += "</pre>\n";
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361 | errin.close();
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362 |
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363 | } else {
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364 | errorpage += "Please consult " GSDL_GSDLHOME "/etc/errout.txt for more information.\n";
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365 | }
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366 |
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367 | errorpage += "</body>\n";
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368 | errorpage += "</html>\n";
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369 | }
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370 |
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371 |
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372 | // cgiwrapper does everything necessary to output a page
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373 | // using the cgi protocol. If this is being run for a particular
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374 | // collection then "collection" should be set, otherwise it
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375 | // should equal "".
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376 | void cgiwrapper (receptionist &recpt, text_t collection) {
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377 | #ifdef USE_FASTCGI
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378 | fcgistreambuf outbuf;
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379 | #endif
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380 |
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381 | // init stuff - we can't output error pages directly with
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382 | // fastcgi so the pages are stored until we can output them
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383 | text_t errorpage;
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384 | outconvertclass text_t2ascii;
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385 |
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386 | // set defaults
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387 | int maxrequests = 10000;
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388 | recpt.configure ("gsdlhome", GSDL_GSDLHOME);
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389 | recpt.configure ("collection", collection);
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390 | recpt.configure ("httpimg", "/gsdl/images");
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391 | char *script_name = getenv("SCRIPT_NAME");
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392 | if (script_name != NULL) recpt.configure("gwcgi", script_name);
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393 | else recpt.configure("gwcgi", "/cgi-bin/gw");
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394 |
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395 | // read in the configuration files.
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396 | if (!site_cfg_read (recpt, GSDL_GSDLHOME, collection, maxrequests)) {
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397 | // couldn't find the site configuration file
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398 | page_errorsitecfg (GSDL_GSDLHOME, collection, errorpage);
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399 | } else if (!main_cfg_read (recpt, GSDL_GSDLHOME, collection)) {
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400 | // couldn't find the main configuration file
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401 | page_errormaincfg (GSDL_GSDLHOME, collection, errorpage);
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402 | }
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403 |
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404 | // initialise the library software
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405 | if (errorpage.empty()) {
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406 | ofstream initout (GSDL_GSDLHOME "/etc/initout.txt");
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407 | if (!recpt.init(initout)) {
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408 | // an error occurred during the initialisation
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409 | initout.close();
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410 | page_errorinit(GSDL_GSDLHOME, errorpage);
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411 | }
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412 | initout.close();
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413 | }
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414 |
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415 | // find out whether this is being run as a cgi-script
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416 | // or a fastcgi script
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417 | int numrequests = 0;
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418 | #ifdef USE_FASTCGI
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419 | int isfastcgi = !FCGX_IsCGI();
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420 | FCGX_Stream *fcgiin, *fcgiout, *fcgierr;
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421 | FCGX_ParamArray fcgienvp;
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422 | #else
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423 | int isfastcgi = 0;
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424 | #endif
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425 |
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426 | // get the query string if it is not being run as a fastcgi
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427 | // script
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428 | text_t argstr = "";
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429 | cgiargsclass args;
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430 | char *aURIStr;
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431 | if (!isfastcgi) {
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432 | char *request_method_str = getenv("REQUEST_METHOD");
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433 | char *content_length_str = getenv("CONTENT_LENGTH");
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434 | if (request_method_str != NULL && strcmp(request_method_str, "POST") == 0 &&
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435 | content_length_str != NULL) {
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436 | // POST form data
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437 | int content_length = text_t(content_length_str).getint();
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438 | if (content_length > 0) {
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439 | char c;
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440 | do {
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441 | cin.get(c);
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442 | if (cin.eof()) break;
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443 | argstr.push_back (c);
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444 | content_length--;
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445 | } while (content_length > 0);
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446 | }
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447 |
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448 | } else {
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449 | aURIStr = getenv("QUERY_STRING");
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450 | if ((request_method_str != NULL && strcmp(request_method_str, "GET") == 0)
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451 | || aURIStr != NULL) {
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452 | // GET form data
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453 | if (aURIStr != NULL) argstr = aURIStr;
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454 | } else {
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455 | // debugging from command line
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456 | char cinURIStr[1024];
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457 | cin.get(cinURIStr, 1024);
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458 | argstr = cinURIStr;
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459 | }
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460 | }
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461 |
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462 | // cgi scripts only deal with one request
|
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463 | maxrequests = 1;
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464 | }
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465 |
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466 | // Page-request loop. If this is not being run as a fastcgi
|
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467 | // process then only one request will be processed and then
|
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468 | // the process will exit.
|
---|
469 | while (numrequests < maxrequests) {
|
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470 | #ifdef USE_FASTCGI
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471 | if (isfastcgi) {
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472 | if (FCGX_Accept(&fcgiin, &fcgiout, &fcgierr, &fcgienvp) < 0) break;
|
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473 | aURIStr = FCGX_GetParam("QUERY_STRING", fcgienvp);
|
---|
474 | if (aURIStr != NULL) argstr = aURIStr;
|
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475 | else argstr = "";
|
---|
476 | }
|
---|
477 | #endif
|
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478 |
|
---|
479 | // get output streams ready
|
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480 | #ifdef USE_FASTCGI
|
---|
481 | outbuf.fcgisbreset ();
|
---|
482 | if (isfastcgi) outbuf.set_fcgx_stream (fcgiout);
|
---|
483 | else outbuf.set_other_ostream (&cout);
|
---|
484 | ostream pageout (&outbuf);
|
---|
485 | #else
|
---|
486 | #define pageout cout
|
---|
487 | #endif
|
---|
488 |
|
---|
489 | // if using fastcgi we'll load environment into a map,
|
---|
490 | // otherwise simply pass empty map (can't get environment
|
---|
491 | // variables using getenv() while using FCGX versions
|
---|
492 | // of fastcgi - at least I can't ;-) - Stefan)
|
---|
493 | text_tmap fastcgienv;
|
---|
494 | #ifdef USE_FASTCGI
|
---|
495 | if (isfastcgi) {
|
---|
496 | for(; *fcgienvp != NULL; fcgienvp++) {
|
---|
497 | text_t fvalue = *fcgienvp;
|
---|
498 | text_t::const_iterator begin = fvalue.begin();
|
---|
499 | text_t::const_iterator end = fvalue.end();
|
---|
500 | text_t::const_iterator equals_sign = findchar (begin, end, '=');
|
---|
501 | if (equals_sign != end)
|
---|
502 | fastcgienv[substr(begin, equals_sign)] = substr(equals_sign+1, end);
|
---|
503 | }
|
---|
504 | }
|
---|
505 | #endif
|
---|
506 |
|
---|
507 | // temporarily need to configure gwcgi here when using fastcgi as I can't
|
---|
508 | // get it to pass the SCRIPT_NAME environment variable to the initial
|
---|
509 | // environment (if anyone can work out how to do this using the apache
|
---|
510 | // server, let me know). Note that this overrides the gwcgi field in
|
---|
511 | // site.cfg (which it shouldn't do) but I can't at present set gwcgi
|
---|
512 | // from site.cfg as I have old receptionists laying around that wouldn't
|
---|
513 | // appreciate it. The following 5 lines of code should be deleted once
|
---|
514 | // I either a: get the server to pass SCRIPT_NAME at initialization
|
---|
515 | // time or b: convert all the collections using old receptionists over
|
---|
516 | // to this version and uncomment gwcgi in the site.cfg file -- Stefan.
|
---|
517 | #ifdef USE_FASTCGI
|
---|
518 | if (isfastcgi) {
|
---|
519 | recpt.configure("gwcgi", fastcgienv["SCRIPT_NAME"]);
|
---|
520 | }
|
---|
521 | #endif
|
---|
522 |
|
---|
523 |
|
---|
524 | if (errorpage.empty()) {
|
---|
525 | ofstream errout (GSDL_GSDLHOME "/etc/errout.txt");
|
---|
526 | cerr = errout;
|
---|
527 |
|
---|
528 | // parse the cgi arguments and produce the resulting page if there
|
---|
529 | // has been no errors so far
|
---|
530 | if (!recpt.parse_cgi_args (argstr, args, errout, fastcgienv)) {
|
---|
531 | errout.close ();
|
---|
532 | page_errorparseargs(GSDL_GSDLHOME, errorpage);
|
---|
533 | } else {
|
---|
534 | if (!recpt.produce_cgi_page (args, pageout, errout, fastcgienv)) {
|
---|
535 | errout.close ();
|
---|
536 | page_errorcgipage(GSDL_GSDLHOME, errorpage);
|
---|
537 | } else {
|
---|
538 | errout.close ();
|
---|
539 | }
|
---|
540 | recpt.log_cgi_args (args, errout, fastcgienv);
|
---|
541 | }
|
---|
542 | }
|
---|
543 | // there was an error, output the error page
|
---|
544 | if (!errorpage.empty()) {
|
---|
545 | pageout << text_t2ascii << errorpage;
|
---|
546 | errorpage.clear();
|
---|
547 | numrequests = maxrequests; // make this the last page
|
---|
548 | }
|
---|
549 | pageout << flush;
|
---|
550 |
|
---|
551 | // finish with the output streams
|
---|
552 | #ifdef USE_FASTCGI
|
---|
553 | if (isfastcgi) FCGX_Finish();
|
---|
554 | #endif
|
---|
555 |
|
---|
556 | numrequests++;
|
---|
557 | }
|
---|
558 |
|
---|
559 | return;
|
---|
560 | }
|
---|
561 |
|
---|