[108] | 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 305 1999-06-28 02:18:01Z sjboddie $
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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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[145] | 16 | #include "gsdlconf.h"
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[108] | 17 | #include "text_t.h"
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| 18 | #include "cgiargs.h"
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[155] | 19 | #include "display.h"
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| 20 | #include "action.h"
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[165] | 21 | #include "recptproto.h"
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| 22 | #include "converter.h"
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[108] | 23 |
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| 24 | #ifndef MACROPRECEDENCE
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| 25 | #define MACROPRECEDENCE "style,collection,queryversion,version,language"
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| 26 | #endif
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| 27 |
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| 28 |
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[165] | 29 | struct recptconf {
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| 30 | text_t gsdlhome;
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| 31 | text_t collection; // will equal "" in 'general' mode
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| 32 | text_t collectdir; // will equal gsdlhome in 'general' mode
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[305] | 33 | text_t httpprefix;
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[165] | 34 | text_t httpimg;
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| 35 | text_t gwcgi;
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| 36 | text_tarray macrofiles;
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| 37 | text_t saveconf;
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| 38 | };
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| 39 |
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| 40 |
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[108] | 41 | class receptionist {
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[165] | 42 | protected:
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| 43 | recptconf configinfo;
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| 44 |
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| 45 | cgiargsinfoclass argsinfo;
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| 46 | actionmapclass actions;
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| 47 | recptprotolistclass protocols;
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| 48 | displayclass disp;
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| 49 | convertinfoclass converters;
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[296] | 50 |
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[173] | 51 | // prepare_page sets up page parameters, sets display macros
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| 52 | // and opens the page ready for output
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[296] | 53 | void prepare_page (action *a, cgiargsclass &args, recptproto *collectproto,
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| 54 | outconvertclass &outconvert, ostream &logout);
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| 55 | void define_general_macros (cgiargsclass &args, outconvertclass &outconvert,
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| 56 | ostream &logout);
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[165] | 57 |
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[108] | 58 | public:
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[145] | 59 | receptionist () {}
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[108] | 60 | virtual ~receptionist() {}
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| 61 |
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[165] | 62 | // add_action makes another action available to the receptionist
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| 63 | // the action remains the property of the calling code and that
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| 64 | // code should destroy the action after the recptionist has been
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| 65 | // destroyed.
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| 66 | void add_action (action *theaction) {actions.addaction(theaction);}
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| 67 | actionmapclass *get_actionmap_ptr () {return &actions;}
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[108] | 68 |
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[165] | 69 | // add_protocol makes another protocol available to the receptionist
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| 70 | // without any protocols, no collections will be available. The
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| 71 | // protocols remain the property of the calling code.
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| 72 | void add_protocol (recptproto *theprotocol) {protocols.addrecptproto(theprotocol);}
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| 73 | recptprotolistclass *get_recptprotolist_ptr () {return &protocols;}
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| 74 |
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| 75 | // add_converter makes another converter available to the receptionist.
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| 76 | // Converters are needed to display pages using different encodings.
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| 77 | // The converters remain the property of the calling code.
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| 78 | void add_converter (const text_t &name, inconvertclass *inconverter,
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| 79 | rzwsoutconvertclass *outconverter)
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| 80 | {converters.add_converter(name, inconverter, outconverter);}
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| 81 | convertinfoclass *get_convertinfo_ptr () {return &converters;}
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[108] | 82 |
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[145] | 83 |
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[165] | 84 | // configure should be called for each line in the
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| 85 | // configuration files to configure the receptionist and everything
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| 86 | // it contains. The configuration should take place after everything
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| 87 | // has been added but before the initialisation.
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| 88 | void configure (const text_t &key, const text_tarray &cfgline);
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| 89 | void configure (const text_t &key, const text_t &value);
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| 90 | const recptconf &get_configinfo () {return configinfo;}
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| 91 | cgiargsinfoclass *get_cgiargsinfo_ptr () {return &argsinfo;}
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| 92 |
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[108] | 93 |
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[165] | 94 | // init should be called after all the actions, protocols, and
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| 95 | // converters have been added to the receptionist and after everything
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| 96 | // has been configured but before any pages are created.
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[108] | 97 | // It returns true on success and false on failure. If false is
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| 98 | // returned getpage should not be called (without producing
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| 99 | // meaningless output), instead an error page should be
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| 100 | // produced by the calling code.
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[150] | 101 | bool init (ostream &logout);
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[108] | 102 |
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| 103 | // There are two ways to produce a page. You can either call parse_cgi_args,
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[155] | 104 | // get_cgihead_info, and produce_content or you can just call parse_cgi_args and
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| 105 | // produce_cgi_page (which will be satisfactory in most cases). You might want to call
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[108] | 106 | // parse_cgi_args, get_cgihead_info, and produce_content when you want to
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[155] | 107 | // interface directly with a web server for which the standard header is inappropriate.
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[108] | 108 |
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| 109 | // parse_cgi_args parses cgi arguments into an argument class.
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[155] | 110 | // This function should be called for each page request. It returns false
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| 111 | // if there was a major problem with the cgi arguments.
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| 112 | bool parse_cgi_args (const text_t &argstr, cgiargsclass &args, ostream &logout);
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[108] | 113 |
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[155] | 114 | // produce_cgi_page will call get_cgihead_info and
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| 115 | // produce_content in the appropriate way to output a cgi header and
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| 116 | // the page content (if needed). If a page could not be created it
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| 117 | // will return false
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| 118 | bool produce_cgi_page (cgiargsclass &args, ostream &contentout,
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| 119 | ostream &logout);
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[108] | 120 |
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| 121 | // get_cgihead_info determines the cgi header information for
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| 122 | // a set of cgi arguments. If response contains location then
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| 123 | // response_data contains the redirect address. If reponse
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| 124 | // contains content then reponse_data contains the content-type.
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| 125 | // Note that images can now be produced by the receptionist.
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[146] | 126 | void get_cgihead_info (cgiargsclass &args, response_t &response,
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[108] | 127 | text_t &response_data, ostream &logout);
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| 128 |
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| 129 | // produce the page content
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[155] | 130 | bool produce_content (cgiargsclass &args, ostream &contentout,
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[108] | 131 | ostream &logout);
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| 132 |
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| 133 | // returns the compressed argument ("e") corresponding to the argument
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| 134 | // list. This can be used to save preferences between sessions.
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[296] | 135 | text_t get_compressed_arg (cgiargsclass &args, outconvertclass &outconvert,
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| 136 | ostream &logout);
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[108] | 137 |
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| 138 | protected:
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[155] | 139 | // will read in all the macro files. If one is not found an
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| 140 | // error message will be written to logout and the method will
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| 141 | // return false.
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| 142 | bool read_macrofiles (ostream &logout);
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[108] | 143 |
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[155] | 144 | // Will define the main general arguments used by the receptionist.
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| 145 | // If an error occurs a message will be written to logout and the
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| 146 | // method will return false.
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| 147 | virtual bool define_mainargs (ostream &logout);
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| 148 |
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| 149 | // check_mainargs will check all the main arguments. If a major
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| 150 | // error is found it will return false and no cgi page should
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| 151 | // be created using the arguments.
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| 152 | virtual bool check_mainargs (cgiargsclass &args, ostream &logout);
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[108] | 153 | };
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| 154 |
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| 155 |
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| 156 | #endif
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