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 | * PUT COPYRIGHT NOTICE HERE
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7 | *
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8 | * $Id: receptionist.h 155 1999-02-08 01:28:04Z rjmcnab $
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9 | *
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10 | *********************************************************************/
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11 |
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12 |
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13 | #ifndef RECEPTIONIST_H
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14 | #define RECEPTIONIST_H
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15 |
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16 | #include "gsdlconf.h"
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17 | #include "text_t.h"
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18 | #include "cgiargs.h"
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19 | #include "display.h"
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20 | #include "action.h"
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21 |
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22 | #ifndef MACROPRECEDENCE
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23 | #define MACROPRECEDENCE "style,collection,queryversion,version,language"
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24 | #endif
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25 |
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26 |
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27 | class receptionist {
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28 | public:
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29 | receptionist () {}
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30 | virtual ~receptionist() {}
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31 |
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32 | // this version of set_gsdlhome should be used if the receptionist
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33 | // is being run for multiple collections ("general" mode).
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34 | void set_gsdlhome (const text_t &thegsdlhome);
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35 | text_t get_gsdlhome () {return gsdlhome;}
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36 |
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37 | // this version of set_gsdlhome should be used if the receptionist
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38 | // is being run for a single collection ("collection specific" mode).
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39 | void set_gsdlhome (const text_t &thegsdlhome, const text_t &thecollection);
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40 | text_t get_collection () {return collection;}
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41 |
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42 | // sets the http address of the images directory. This is used to
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43 | // speed up the access to the images which are a part of the general
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44 | // interface. If this is not set the interface will have to get the
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45 | // images via gwcgi which will be a lot slower (especially if the
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46 | // browser does not cache the images).
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47 | void set_httpimg (const text_t &thehttpimg) {httpimg=thehttpimg;}
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48 | text_t get_httpimg () {return httpimg;}
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49 |
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50 | // sets the http address of the gateway cgi program (ie. the program
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51 | // that contains this receptionist).
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52 | void set_gwcgi (const text_t &thegwcgi) {gwcgi=thegwcgi;}
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53 | text_t get_gwcgi () {return gwcgi;}
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54 |
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55 | // set_macrofiles defines the macro files which will be read when
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56 | // the init function is called.
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57 | void set_macrofiles (const text_tarray &themacrofiles) {macrofiles=themacrofiles;}
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58 | text_tarray get_macrofiles () {return macrofiles;}
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59 |
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60 | // set_saveconf defines what should be included in the compressed
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61 | // arguments. This string should consist of cgi argument names
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62 | // seperated by "-".
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63 | void set_saveconf (const text_t &thesaveconf) {saveconf=thesaveconf;}
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64 | text_t get_saveconf () {return saveconf;}
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65 |
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66 | // add_action makes another action available to the receptionist
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67 | // the action becomes the property of the receptionist
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68 | void add_action (action *theaction) {actions.addaction(theaction);}
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69 |
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70 | // configure_actions should be called for each line in the
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71 | // configuration files to configure the actions. The configuration
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72 | // should take place after all the actions have been added.
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73 | void configure_actions (const text_t &key, const text_tarray &cfgline);
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74 |
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75 | // init should be called after setgsdhome has been called.
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76 | // It returns true on success and false on failure. If false is
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77 | // returned getpage should not be called (without producing
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78 | // meaningless output), instead an error page should be
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79 | // produced by the calling code.
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80 | bool init (ostream &logout);
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81 |
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82 | // There are two ways to produce a page. You can either call parse_cgi_args,
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83 | // get_cgihead_info, and produce_content or you can just call parse_cgi_args and
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84 | // produce_cgi_page (which will be satisfactory in most cases). You might want to call
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85 | // parse_cgi_args, get_cgihead_info, and produce_content when you want to
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86 | // interface directly with a web server for which the standard header is inappropriate.
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87 |
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88 | // parse_cgi_args parses cgi arguments into an argument class.
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89 | // This function should be called for each page request. It returns false
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90 | // if there was a major problem with the cgi arguments.
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91 | bool parse_cgi_args (const text_t &argstr, cgiargsclass &args, ostream &logout);
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92 |
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93 | // produce_cgi_page will call get_cgihead_info and
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94 | // produce_content in the appropriate way to output a cgi header and
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95 | // the page content (if needed). If a page could not be created it
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96 | // will return false
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97 | bool produce_cgi_page (cgiargsclass &args, ostream &contentout,
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98 | ostream &logout);
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99 |
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100 | // get_cgihead_info determines the cgi header information for
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101 | // a set of cgi arguments. If response contains location then
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102 | // response_data contains the redirect address. If reponse
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103 | // contains content then reponse_data contains the content-type.
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104 | // Note that images can now be produced by the receptionist.
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105 | void get_cgihead_info (cgiargsclass &args, response_t &response,
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106 | text_t &response_data, ostream &logout);
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107 |
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108 | // produce the page content
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109 | bool produce_content (cgiargsclass &args, ostream &contentout,
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110 | ostream &logout);
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111 |
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112 | // returns the compressed argument ("e") corresponding to the argument
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113 | // list. This can be used to save preferences between sessions.
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114 | text_t get_compressed_arg (const cgiargsclass &args);
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115 |
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116 | protected:
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117 | text_t gsdlhome;
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118 | text_t collectdir; // will equal gsdlhome in 'general' mode
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119 | text_t collection; // will equal "" in 'general' mode
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120 | text_t httpimg;
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121 | text_t gwcgi;
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122 |
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123 | displayclass disp;
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124 | text_tarray macrofiles;
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125 |
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126 | text_t saveconf;
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127 | cgiargsinfoclass argsinfo;
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128 | actionmapclass actions;
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129 |
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130 | // will read in all the macro files. If one is not found an
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131 | // error message will be written to logout and the method will
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132 | // return false.
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133 | bool read_macrofiles (ostream &logout);
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134 |
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135 | // Will define the main general arguments used by the receptionist.
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136 | // If an error occurs a message will be written to logout and the
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137 | // method will return false.
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138 | virtual bool define_mainargs (ostream &logout);
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139 |
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140 | // check_mainargs will check all the main arguments. If a major
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141 | // error is found it will return false and no cgi page should
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142 | // be created using the arguments.
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143 | virtual bool check_mainargs (cgiargsclass &args, ostream &logout);
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144 | };
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145 |
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146 |
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147 | #endif
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