1 | /**********************************************************************
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2 | *
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3 | * receptionist.h -- a web interface for the gsdl
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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: receptionist.h 864 2000-01-24 22:53:09Z 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 | #ifndef RECEPTIONIST_H
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30 | #define RECEPTIONIST_H
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31 |
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32 | #include "gsdlconf.h"
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33 | #include "text_t.h"
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34 | #include "cgiargs.h"
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35 | #include "display.h"
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36 | #include "action.h"
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37 | #include "browserclass.h"
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38 | #include "recptproto.h"
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39 | #include "converter.h"
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40 | #include "cfgread.h"
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41 |
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42 | // the MACROPRECEDENCE macro is used as a default. override
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43 | // it using something like:
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44 | //
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45 | // macroprecedence c,l
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46 | //
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47 | // in your configuration file
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48 | #ifndef MACROPRECEDENCE
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49 | #define MACROPRECEDENCE "c,l"
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50 | #endif
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51 |
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52 |
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53 | struct recptconf {
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54 | text_t gsdlhome;
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55 | text_t gdbmhome; // will equal gsdlhome if not set
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56 | text_t collection; // will equal "" in 'general' mode
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57 | text_t collectdir; // will equal gsdlhome in 'general' mode
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58 | colinfo_tmap collectinfo;
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59 | text_t httpprefix;
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60 | text_t httpimg;
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61 | text_t gwcgi;
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62 | text_tset macrofiles;
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63 | text_t saveconf;
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64 | bool usecookies; // true if we want cookies set
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65 | bool logcgiargs; // true if we want to log cgi arguments
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66 |
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67 | text_tmap pageparams;
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68 | text_t macroprecedence;
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69 |
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70 | void clear ();
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71 | recptconf () {clear();}
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72 | };
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73 |
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74 |
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75 | class receptionist {
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76 | protected:
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77 | recptconf configinfo;
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78 |
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79 | cgiargsinfoclass argsinfo;
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80 | actionmapclass actions;
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81 | browsermapclass browsers;
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82 | recptprotolistclass protocols;
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83 | displayclass disp;
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84 | convertinfoclass converters;
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85 | ColInfoResponse_t collectinfo;
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86 |
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87 | // prepare_page sets up page parameters, sets display macros
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88 | // and opens the page ready for output
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89 | virtual void prepare_page (action *a, cgiargsclass &args,
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90 | outconvertclass &outconvert,
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91 | ostream &logout);
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92 |
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93 | virtual void translate_OIDs (cgiargsclass &args, recptproto *collectproto,
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94 | ostream &logout);
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95 |
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96 | bool get_cookie (text_t &cookie, text_tmap &fcgienv);
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97 | bool get_cookie (text_tmap &fcgienv);
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98 |
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99 | virtual void define_general_macros (cgiargsclass &args, outconvertclass &outconvert,
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100 | ostream &logout);
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101 |
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102 | bool append_logstr (const text_t &filename, const text_t &logstr,
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103 | ostream &logout);
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104 |
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105 | public:
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106 | receptionist ();
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107 | virtual ~receptionist() {}
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108 |
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109 | // add_action makes another action available to the receptionist
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110 | // the action remains the property of the calling code and that
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111 | // code should destroy the action after the recptionist has been
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112 | // destroyed.
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113 | void add_action (action *theaction);
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114 | actionmapclass *get_actionmap_ptr () {return &actions;}
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115 |
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116 | // add_browser makes another browser available to the receptionist
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117 | // the browser remains the property of the calling code and that
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118 | // code should destroy it after the recptionist has been
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119 | // destroyed.
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120 | void add_browser (browserclass *thebrowser);
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121 | browsermapclass *get_browsermap_ptr () {return &browsers;}
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122 | void setdefaultbrowser (const text_t &browsername);
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123 |
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124 | // add_protocol makes another protocol available to the receptionist
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125 | // without any protocols, no collections will be available. The
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126 | // protocols remain the property of the calling code.
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127 | void add_protocol (recptproto *theprotocol) {protocols.addrecptproto(theprotocol);}
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128 | recptprotolistclass *get_recptprotolist_ptr () {return &protocols;}
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129 |
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130 | // add_converter makes another converter available to the receptionist.
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131 | // Converters are needed to display pages using different encodings.
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132 | // The converters remain the property of the calling code.
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133 | void add_converter (const text_t &name, inconvertclass *inconverter,
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134 | rzwsoutconvertclass *outconverter) {
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135 | converters.add_converter(name, inconverter, outconverter);}
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136 | convertinfoclass *get_convertinfo_ptr () {return &converters;}
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137 |
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138 |
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139 | // configure should be called for each line in the
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140 | // configuration files to configure the receptionist and everything
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141 | // it contains. The configuration should take place after everything
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142 | // has been added but before the initialisation.
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143 | virtual void configure (const text_t &key, const text_tarray &cfgline);
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144 | virtual void configure (const text_t &key, const text_t &value);
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145 | const recptconf &get_configinfo () {return configinfo;}
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146 | cgiargsinfoclass *get_cgiargsinfo_ptr () {return &argsinfo;}
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147 |
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148 |
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149 | // init should be called after all the actions, protocols, and
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150 | // converters have been added to the receptionist and after everything
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151 | // has been configured but before any pages are created.
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152 | // It returns true on success and false on failure. If false is
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153 | // returned getpage should not be called (without producing
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154 | // meaningless output), instead an error page should be
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155 | // produced by the calling code.
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156 | virtual bool init (ostream &logout);
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157 |
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158 | // There are two ways to produce a page. You can either call parse_cgi_args,
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159 | // get_cgihead_info, and produce_content or you can just call parse_cgi_args and
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160 | // produce_cgi_page (which will be satisfactory in most cases). You might want to call
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161 | // parse_cgi_args, get_cgihead_info, and produce_content when you want to
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162 | // interface directly with a web server for which the standard header is inappropriate.
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163 |
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164 | // parse_cgi_args parses cgi arguments into an argument class.
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165 | // This function should be called for each page request. It returns false
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166 | // if there was a major problem with the cgi arguments.
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167 | virtual bool parse_cgi_args (const text_t &argstr, cgiargsclass &args,
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168 | ostream &logout, text_tmap &fcgienv);
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169 |
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170 | virtual bool log_cgi_args (cgiargsclass &args, ostream &logout, text_tmap &fcgienv);
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171 |
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172 | text_t expandmacros (const text_t &astring, cgiargsclass &args,
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173 | ostream &logout);
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174 |
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175 | // produce_cgi_page will call get_cgihead_info and
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176 | // produce_content in the appropriate way to output a cgi header and
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177 | // the page content (if needed). If a page could not be created it
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178 | // will return false
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179 | virtual bool produce_cgi_page (cgiargsclass &args, ostream &contentout,
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180 | ostream &logout, text_tmap &fcgienv);
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181 |
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182 | // get_cgihead_info determines the cgi header information for
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183 | // a set of cgi arguments. If response contains location then
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184 | // response_data contains the redirect address. If reponse
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185 | // contains content then reponse_data contains the content-type.
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186 | // Note that images can now be produced by the receptionist.
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187 | virtual void get_cgihead_info (cgiargsclass &args, response_t &response,
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188 | text_t &response_data, ostream &logout,
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189 | text_tmap &fcgienv);
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190 |
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191 | // produce the page content
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192 | virtual bool produce_content (cgiargsclass &args, ostream &contentout,
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193 | ostream &logout);
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194 |
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195 | // returns the compressed argument ("e") corresponding to the argument
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196 | // list. This can be used to save preferences between sessions.
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197 | text_t get_compressed_arg (cgiargsclass &args, ostream &logout);
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198 |
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199 | protected:
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200 | // will read in all the macro files. If one is not found an
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201 | // error message will be written to logout and the method will
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202 | // return false.
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203 | virtual bool read_macrofiles (ostream &logout);
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204 |
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205 | // check_mainargs will check all the main arguments. If a major
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206 | // error is found it will return false and no cgi page should
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207 | // be created using the arguments.
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208 | virtual bool check_mainargs (cgiargsclass &args, ostream &logout);
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209 | };
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210 |
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211 |
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212 | #endif
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