1 | /**********************************************************************
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2 | *
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3 | * rssaction.cpp --
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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 | *********************************************************************/
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25 |
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26 | #include "gsdl_modules_cfg.h"
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27 | #ifdef USE_RSS
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28 |
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29 | #include "fileutil.h"
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30 |
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31 | #include "rssaction.h"
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32 |
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33 | rssaction::rssaction () {
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34 | // this action uses cgi variable "a"
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35 | cgiarginfo arg_ainfo;
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36 | arg_ainfo.shortname = "a";
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37 | arg_ainfo.longname = "action";
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38 | arg_ainfo.multiplechar = true;
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39 | arg_ainfo.multiplevalue = false;
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40 | arg_ainfo.defaultstatus = cgiarginfo::weak;
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41 | arg_ainfo.argdefault = "rss";
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42 | arg_ainfo.savedarginfo = cgiarginfo::must;
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43 |
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44 | argsinfo.addarginfo (NULL, arg_ainfo);
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45 |
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46 | }
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47 |
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48 | void rssaction::get_cgihead_info (cgiargsclass &/*args*/, recptprotolistclass * /*protos*/,
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49 | response_t &response, text_t &response_data,
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50 | ostream &/*logout*/) {
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51 | response = content;
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52 | response_data = "application/rdf+xml";
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53 | }
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54 |
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55 | void rssaction::generate_rss_header( displayclass &disp,
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56 | outconvertclass &outconvert, ostream &textout,
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57 | ostream &logout)
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58 | {
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59 | textout << outconvert << disp
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60 | << "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n"
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61 | << "<rss version=\"2.0\"\n"
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62 | << "xmlns:content=\"http://purl.org/rss/1.0/modules/content/\"\n"
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63 | << " xmlns:taxo=\"http://purl.org/rss/1.0/modules/taxonomy/\"\n"
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64 | << " xmlns:dc=\"http://purl.org/dc/elements/1.1/\"\n"
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65 | << " xmlns:syn=\"http://purl.org/rss/1.0/modules/syndication/\"\n"
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66 | << " xmlns:admin=\"http://webns.net/mvcb/\">\n"
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67 |
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68 | << "<channel>\n"
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69 | << " <title>_collectionname_</title>\n"
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70 | << " <link>_httpdomainHtmlsafe__httppageabout_</link>\n"
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71 | << " <description>_collectionextra_</description>\n"
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72 | << " <language>_cgiarglHtmlsafe_</language>\n"
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73 | << " <pubDate>Thu, 23 Aug 1999 07:00:00 GMT</pubDate>\n"
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74 | << " <lastBuildDate>Thu, 23 Aug 1999 16:20:26 GMT</lastBuildDate>\n"
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75 | << " <managingEditor>_creator_</managingEditor>\n"
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76 | << " <webMaster>_maintainer_</webMaster>\n"
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77 |
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78 | << "<image>\n"
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79 | << " <title>_collectionname_</title>\n"
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80 | << " <url>_iconcollection_</url>\n"
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81 | << " <link>_httpdomainHtmlsafe__httppageabout_</link>\n"
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82 | << " <description>_collectionextra_</description>\n"
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83 | << "</image>\n";
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84 | }
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85 |
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86 | void rssaction::generate_rss_content(text_t& rss_items, displayclass &disp,
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87 | outconvertclass &outconvert, ostream &textout,
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88 | ostream &logout)
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89 | {
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90 | textout << outconvert << disp << rss_items;
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91 | }
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92 |
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93 | void rssaction::generate_rss_footer( displayclass &disp,
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94 | outconvertclass &outconvert, ostream &textout,
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95 | ostream &logout)
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96 | {
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97 |
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98 | textout << outconvert << disp
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99 | << " </channel>\n"
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100 | << "</rss>\n";
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101 | }
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102 |
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103 |
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104 | bool rssaction::do_action (cgiargsclass &args, recptprotolistclass *protos,
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105 | browsermapclass * /*browsers*/, displayclass& disp,
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106 | outconvertclass &outconvert, ostream &textout,
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107 | ostream &logout) {
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108 | text_t rss_items;
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109 | bool success = false;
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110 | comerror_t err;
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111 |
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112 | text_t &arg_c = args["c"];
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113 |
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114 |
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115 | // Before resolving the _httpdomain_ macro
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116 | // 1. Check if _httpdomain_ was defined by user in macros (packages rssfeed of rss.dm and Global).
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117 | // E.g. user could have defined it in package Global of zextra.dm
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118 | // If none found, try to get it from the cgiargs hostname= (set using javascript),
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119 | // and set as macro for the desired package (e.g. package rss). Setting httpdomain in package Global.
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120 | // If the httpdomain macro needs to be in package rss, then need to mention this macro as
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121 | // "_rss:httpdomain_" not "_httpdomain_" throughout rss-items.
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122 | // If ever adding a custom macro file like rss.dm that mentions the package, need to list rss.dm in etc/main.cfg
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123 |
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124 | if(disp.havemacro("Global", "httpdomain") == 0) { // if using rss package, will check rss and Global packages in order. And if not found:
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125 |
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126 | if(!args["hostname"].empty()) {
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127 | disp.setmacro("httpdomain", "Global", "http://" + args["hostname"]);
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128 | disp.setmacro("httpdomainHtmlsafe", "Global", "http://" + encodeForHTML(args["hostname"]));
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129 | }
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130 | else { // we shouldn't have to get here
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131 | text_t default_domain = "http://localhost:8282";
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132 | disp.setmacro("httpdomain", "Global", default_domain); // the default used in zextra.dm. (Could perhaps default this to localhost too)
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133 | disp.setmacro("httpdomainHtmlsafe", "Global", encodeForHTML(default_domain));
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134 | }
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135 | }
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136 |
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137 |
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138 | if (!args["c"].empty()) {
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139 | recptproto* collectproto = protos->getrecptproto (arg_c, logout);
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140 | if (collectproto != NULL) {
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141 | collectproto->get_rss_items (arg_c, gsdlhome, rss_items, err, logout);
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142 | if (err == noError) success = true;
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143 | // else a communication error
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144 | }
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145 | }
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146 |
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147 | generate_rss_header(disp,outconvert,textout,logout);
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148 | if(success) {
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149 | generate_rss_content(rss_items,disp,outconvert,textout,logout);
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150 | }
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151 | generate_rss_footer(disp,outconvert,textout,logout);
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152 |
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153 | return success;
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154 | };
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155 |
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156 | #endif //USE_RSS
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