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