1 | /**********************************************************************
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2 | *
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3 | * mod_gsdl.cpp -- front end for apache 1.3 or 2.x module
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4 | * Copyright (C) 2003 DL Consulting Ltd
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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 <iostream>
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27 | using namespace std;
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28 |
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29 | #include "httpd.h"
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30 | #include "http_core.h"
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31 | #include "http_config.h"
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32 | #include "http_protocol.h"
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33 | #include "http_main.h"
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34 | #include "util_script.h"
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35 | #include "ap_config.h"
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36 | #include "http_log.h"
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37 |
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38 |
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39 | #if _APACHE_MOD >= 2
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40 |
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41 | #include "ap_compat.h"
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42 |
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43 | // In addition to the backward compatible features defined in
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44 | // ap_compat.h, define
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45 |
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46 | typedef apr_pool_t ap_pool; // map old type to new apr_* version
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47 |
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48 | // In Apache 2.x, ap_log_error takes extra parameter -- status code
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49 | // from the previous command; define macro to automatically add in
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50 | // surrogate value of 0 for this
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51 | #define ap_log_error(file,line,level,server,fmt) \
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52 | ap_log_error(file,line,level,0,server,fmt)
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53 |
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54 | #endif
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55 |
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56 | #if defined(USE_MYSQL)
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57 | #include "mysqlclass.h"
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58 | #endif
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59 | #if defined(USE_ACCESS)
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60 | #include "accessclass.h"
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61 | #endif
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62 |
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63 | #include "maincfg.h"
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64 | #include "string_pool.h"
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65 |
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66 | #include "receptionist.h"
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67 | #include "cgiwrapper.h"
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68 | #include "cgiutils.h"
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69 | #include "fileutil.h"
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70 | #include "nullproto.h"
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71 | #include "collectserver.h"
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72 | #include "filter.h"
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73 | #include "browsefilter.h"
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74 |
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75 | //#ifdef ENABLE_MG
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76 | //#include "mgqueryfilter.h"
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77 | //#include "mgsearch.h"
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78 | //#endif
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79 |
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80 | #include "infodbclass.h"
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81 | #include "collectset.h"
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82 |
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83 | #include "gdbmclass.h"
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84 |
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85 | #include "action.h"
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86 | #include "ispersistentaction.h"
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87 | #include "browserclass.h"
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88 |
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89 | #define GSDL_USE_OSTRINGSTREAM 1
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90 | // ostrstream is deprecated => switch to using ostringstream
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91 | // Doing this with the above define so it is easy to switch
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92 | // back to ostrstream this backwards compatability is needed
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93 | // for some reason.
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94 |
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95 | #if defined(GSDL_USE_OSTRINGSTREAM)
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96 | # include <sstream>
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97 | #else
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98 | # if defined(GSDL_USE_IOS_H)
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99 | # if defined(__WIN32__)
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100 | # include <strstrea.h> // vc4
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101 | # else
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102 | # include <strstream.h>
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103 | # endif
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104 | # else
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105 | # include <strstream>
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106 | # endif
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107 | #endif
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108 |
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109 | receptionist recpt;
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110 | nullproto nproto;
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111 |
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112 | extern "C" module MODULE_VAR_EXPORT gsdl_module;
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113 |
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114 | typedef struct {
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115 | char *config_gsdlhome;
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116 | char *config_collecthome;
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117 | char *config_httpprefix;
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118 | char *config_httpweb;
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119 | } gsdl_config;
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120 |
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121 | static void *gsdl_create_config(ap_pool *p, server_rec *s) {
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122 |
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123 | #if _APACHE_MOD >= 2
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124 | gsdl_config *cfg = (gsdl_config *)apr_pcalloc(p, sizeof(gsdl_config));
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125 | #else
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126 | gsdl_config *cfg = (gsdl_config *)ap_pcalloc(p, sizeof(gsdl_config));
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127 | #endif
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128 |
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129 | return (void *)cfg;
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130 | }
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131 |
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132 | static void *gsdl_create_dir_config(ap_pool *p, char *path) {
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133 |
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134 | return (gsdl_config *) gsdl_create_config(p, NULL);
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135 | }
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136 |
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137 | static const char *gsdl_cmd(cmd_parms *cmd, void *mconfig,
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138 | char *val) {
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139 |
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140 | server_rec *s = cmd->server;
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141 | gsdl_config *cfg = (gsdl_config *) ap_get_module_config(s->module_config, &gsdl_module);
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142 |
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143 | if (strcmp(cmd->cmd->name, "gsdlhome") == 0) {
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144 | cfg->config_gsdlhome = val;
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145 | } else if (strcmp(cmd->cmd->name, "collecthome") == 0) {
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146 | cfg->config_collecthome = val;
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147 | } else if (strcmp(cmd->cmd->name, "httpprefix") == 0) {
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148 | cfg->config_httpprefix = val;
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149 | } else if (strcmp(cmd->cmd->name, "httpweb") == 0) {
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150 | cfg->config_httpweb = val;
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151 | }
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152 |
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153 | return NULL;
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154 | }
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155 |
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156 | #if _APACHE_MOD < 2
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157 | static void gsdl_exit(void* d) {
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158 | #else
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159 | static apr_status_t gsdl_exit(void* d) {
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160 | #endif
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161 |
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162 | #if defined(USE_ACCESS)
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163 | // shut down com
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164 | CoUninitialize();
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165 | #endif
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166 |
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167 | #if _APACHE_MOD >= 2
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168 | return APR_SUCCESS;
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169 | #endif
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170 | }
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171 |
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172 | #if _APACHE_MOD < 2
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173 | static void gsdl_init(server_rec *s, ap_pool *p) {
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174 | #else
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175 | static void gsdl_init(ap_pool *p, server_rec *s) {
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176 | #endif
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177 |
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178 | // Register gsdl_exit has cleanup operation for when pchild (process id
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179 | // of child) exits
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180 | #if _APACHE_MOD >= 2
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181 | apr_pool_cleanup_register(p,s, apr_pool_cleanup_null, gsdl_exit);
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182 | #else
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183 | ap_register_cleanup(p,s, ap_null_cleanup, gsdl_exit);
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184 | #endif
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185 |
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186 | recpt.loaded = false;
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187 |
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188 | gsdl_config *cfg = (gsdl_config *) ap_get_module_config(s->module_config, &gsdl_module);
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189 |
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190 | if (!cfg->config_gsdlhome) {
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191 | ap_log_error("", 0, APLOG_ERR, s, "gsdlhome not set\n");
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192 | return;
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193 | }
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194 | text_t gsdlhome = cfg->config_gsdlhome;
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195 |
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196 | if (!directory_exists(gsdlhome)) {
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197 | ap_log_error("", 0, APLOG_ERR, s, "gsdlhome directory does not exist\n");
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198 | return;
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199 | }
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200 |
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201 | if (!cfg->config_collecthome) {
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202 | ap_log_error("", 0, APLOG_ERR, s, "collecthome not set\n");
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203 | return;
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204 | }
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205 | text_t collecthome = cfg->config_collecthome;
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206 |
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207 | if (!directory_exists(collecthome)) {
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208 | ap_log_error("", 0, APLOG_ERR, s, "collecthome directory does not exist\n");
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209 | return;
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210 | }
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211 |
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212 |
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213 | if (!cfg->config_httpprefix) {
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214 | ap_log_error("", 0, APLOG_ERR, s, "httpprefix not set\n");
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215 | return;
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216 | }
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217 |
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218 | if (!cfg->config_httpweb) {
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219 | ap_log_error("", 0, APLOG_ERR, s, "httpweb not set\n");
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220 | return;
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221 | }
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222 |
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223 | text_t httpprefix = cfg->config_httpprefix;
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224 | text_t httpweb = cfg->config_httpweb;
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225 |
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226 | text_t collection = "";
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227 |
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228 | collectset *cservers = new collectset();
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229 |
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230 | cservers->add_all_collections(gsdlhome,collecthome);
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231 |
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232 | // set up the null protocol
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233 | nproto.set_collectset(cservers);
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234 |
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235 | // add the protocol to the receptionist
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236 | recpt.add_protocol(&nproto);
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237 |
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238 | // add database object to receptionist
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239 | #if defined(USE_MYSQL)
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240 | mysqlclass *db = new mysqlclass();
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241 | #elif defined(USE_ACCESS)
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242 | // start up com
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243 | if(FAILED(CoInitialize(NULL))) {
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244 | cout << "CoInitialize failed\n";
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245 | exit(-1);
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246 | }
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247 | accessclass *db = new accessclass();
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248 | #else
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249 |
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250 | // not using either mysql or access database - we'll use the gdbmclass
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251 | // class as a filler (but most likely won't work) - only useful
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252 | // if creating a binary that doesn't require access to the database
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253 | dbclass *db = new gdbmclass(gsdlhome);
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254 |
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255 | #endif
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256 |
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257 | #if defined(USE_MYSQL) || defined(USE_ACCESS)
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258 | recpt.add_dbclass(db);
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259 | #endif
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260 |
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261 | userdbclass *udb = new userdbclass(gsdlhome);
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262 | keydbclass *kdb = new keydbclass(gsdlhome);
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263 | // do these two database classes ever get deleted in the module version
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264 | // of Greenstone?
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265 |
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266 | // librarymain.cpp deletes these when its finished its function
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267 | // does comparable code need to be put into "gsdl_deinit()" routine
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268 | // whatever that might be called in reality?
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269 |
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270 | add_all_actions(recpt,udb,kdb,isPersistent); // apache is a persistent server with mod_gsdl
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271 | add_all_browsers(recpt);
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272 |
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273 |
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274 | // configure everything
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275 | recpt.configure("gsdlhome", gsdlhome);
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276 | recpt.configure("collecthome", collecthome);
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277 | recpt.configure("collection", collection);
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278 | recpt.configure("httpweb", httpweb);
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279 | recpt.configure("httpprefix", httpprefix);
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280 | // set httpprefixfull - if httpprefix is a relative path we need to get
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281 | // the server name and port from the web server environment (note that
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282 | // gwcgi and gwcgifull will be configured for each page request (in gsdl_handler)
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283 | // as we need to know that directory info etc.)
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284 | text_t httpprefixfull = httpprefix;
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285 | if ((httpprefixfull.size() < 7) ||
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286 | (substr(httpprefixfull.begin(), httpprefixfull.begin()+7) != "http://")) {
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287 | if (s->server_hostname && s->port) {
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288 | httpprefixfull = "http://" + text_t(s->server_hostname) + ":" + text_t(s->port) + httpprefixfull;
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289 | }
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290 | }
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291 | recpt.configure("httpprefixfull", httpprefixfull);
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292 |
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293 | // read in main.cfg file
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294 | if (!main_cfg_read(recpt, gsdlhome, collecthome, collection)) {
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295 | ap_log_error("", 0, APLOG_ERR, s, "failed to read main.cfg file\n");
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296 | return;
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297 | }
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298 |
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299 | text_t error_file = filename_cat (gsdlhome, "etc", "error.txt");
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300 | char *eout = error_file.getcstr();
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301 | ofstream errout (eout, ios::app);
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302 | delete eout;
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303 |
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304 | // initialise the library software
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305 | if (!recpt.init(errout)) {
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306 | ap_log_error("", 0, APLOG_ERR, s, "Greenstone failed to initialize\n");
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307 | errout.close();
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308 | return;
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309 | }
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310 |
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311 | errout.close();
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312 |
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313 | // set flag so gsdl_handler can check that everything initialized
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314 | // successfully
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315 | recpt.loaded = true;
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316 | }
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317 |
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318 |
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319 | #if _APACHE_MOD < 2
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320 |
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321 | typedef const char *(*CMD_HAND_TYPE) ();
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322 | static command_rec gsdl_cmds[] = {
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323 | {"gsdlhome", (CMD_HAND_TYPE)gsdl_cmd,
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324 | (void *)XtOffsetOf(gsdl_config, config_gsdlhome),
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325 | OR_ALL, TAKE1, "GSDLHOME directory."},
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326 | {"collecthome", (CMD_HAND_TYPE)gsdl_cmd,
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327 | (void *)XtOffsetOf(gsdl_config, config_collecthome),
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328 | OR_ALL, TAKE1, "COLLECTHOME directory."},
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329 | {"httpprefix", (CMD_HAND_TYPE)gsdl_cmd,
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330 | (void *)XtOffsetOf(gsdl_config, config_httpprefix),
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331 | OR_ALL, TAKE1, "GSDLHOME http path."},
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332 | {"httpweb", (CMD_HAND_TYPE)gsdl_cmd,
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333 | (void *)XtOffsetOf(gsdl_config, config_httpweb),
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334 | OR_ALL, TAKE1, "GSDLHOME http web path."},
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335 | {NULL, NULL, NULL, 0, cmd_how(0), NULL}
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336 | };
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337 | #else
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338 |
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339 | /*
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340 | static const char
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341 | *set_max_cache_size(cmd_parms *parms, void *in_struct_ptr, const char *arg)
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342 | {
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343 | apr_size_t val;
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344 |
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345 | return NULL;
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346 | }
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347 |
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348 | AP_INIT_TAKE1("MCacheSize", set_max_cache_size, NULL, RSRC_CONF,
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349 | "The maximum amount of memory used by the cache in KBytes"),
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350 |
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351 | */
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352 |
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353 | // const char *(*cmd_func)();
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354 |
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355 | static const command_rec gsdl_cmds[] = {
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356 | AP_INIT_TAKE1("gsdlhome", (cmd_func)gsdl_cmd, NULL, OR_ALL,"GSDLHOME directory."),
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357 | AP_INIT_TAKE1("collecthome", (cmd_func)gsdl_cmd, NULL, OR_ALL,"COLLECTHOME directory."),
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358 | AP_INIT_TAKE1("httpprefix", (cmd_func)gsdl_cmd, NULL, OR_ALL,"GSDLHOME http path."),
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359 | AP_INIT_TAKE1("httpweb", (cmd_func)gsdl_cmd, NULL, OR_ALL,"GSDLHOME http web path."),
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360 | {NULL}
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361 | };
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362 |
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363 |
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364 | #endif
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365 |
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366 | static int gsdl_handler(request_rec *r) {
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367 |
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368 | if (strcmp(r->handler, "gsdl")) {
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369 | return DECLINED;
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370 | }
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371 |
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372 | // check that everything has been initialized
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373 | if (!recpt.loaded) {
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374 | ap_log_error("", 0, APLOG_ERR, r->server, "gsdl_handler: attempt to use uninitialized receptionist - aborting\n");
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375 | return 500;
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376 | }
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377 |
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378 | gsdl_config *cfg = (gsdl_config *) ap_get_module_config(r->server->module_config, &gsdl_module);
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379 |
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380 | if (!cfg->config_gsdlhome) {
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381 | ap_log_error("", 0, APLOG_ERR, r->server, "gsdl_handler: gsdlhome not set\n");
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382 | return 500;
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383 | }
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384 |
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385 | if (!cfg->config_collecthome) {
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386 | ap_log_error("", 0, APLOG_ERR, r->server, "gsdl_handler: collecthome not set\n");
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387 | return 500;
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388 | }
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389 |
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390 | // configure gwcgi and gwcgifull
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391 | recpt.configure("gwcgi", r->uri);
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392 | recpt.configure("gwcgifull", "http://" + text_t(r->server->server_hostname) +
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393 | ":" + text_t(r->server->port) + r->uri);
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394 |
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395 | string_pool str_pool;
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396 |
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397 | text_t gsdlhome = cfg->config_gsdlhome;
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398 |
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399 | text_t error_file = filename_cat (gsdlhome, "etc", "error.txt");
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400 | char *eout = str_pool.get_cstr_from_pool(error_file);
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401 | ofstream errout (eout, ios::app);
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402 |
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403 | text_t argstr;
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404 | fileupload_tmap fileuploads;
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405 |
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406 | char *request_method_str = getenv("REQUEST_METHOD");
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407 | char *content_length_str = getenv("CONTENT_LENGTH");
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408 | if (request_method_str != NULL && strcmp(request_method_str, "POST") == 0 &&
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409 | content_length_str != NULL) {
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410 | // POST form data
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411 | long content_length = (content_length_str ? atoi(content_length_str) : 0);
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412 | if (content_length > 0) {
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413 | #ifdef __WIN32__
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414 | // On Windows it is important that standard input be read in binary
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415 | // mode, otherwise end of line "<CR><LF>" is turned into <LF> only
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416 | // which breaks the MIME standard (and our parsing code!)
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417 |
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418 | int result = _setmode( _fileno( stdin ), _O_BINARY );
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419 | if( result == -1 ) {
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420 | cerr << "Warning: Failed to set standard input to binary mode." << endl;
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421 | cerr << " Parsing of multi-part MIME will most likely fail" << endl;
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422 | }
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423 | #endif
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424 |
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425 | long length = content_length;
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426 | unsigned char * buffer = new unsigned char[content_length];
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427 |
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428 | int chars_read = fread(buffer,1,content_length,stdin);
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429 |
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430 | if (chars_read != content_length) {
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431 | cerr << "Warning: mismatch between CONTENT_LENGTH and data read from standard in" << endl;
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432 | }
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433 |
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434 | argstr.setcarr((char *)buffer, content_length);
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435 |
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436 | text_t content_type;
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437 | char *content_type_str = getenv("CONTENT_TYPE");
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438 | if (content_type_str) content_type = content_type_str;
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439 | argstr = parse_post_data(content_type, argstr, fileuploads, gsdlhome);
|
---|
440 | }
|
---|
441 | } else {
|
---|
442 |
|
---|
443 | if (r->args) argstr = r->args;
|
---|
444 | }
|
---|
445 |
|
---|
446 | // parse the cgi arguments and produce the resulting page if there
|
---|
447 | // have been no errors so far
|
---|
448 | cgiargsclass args;
|
---|
449 | text_tmap fastcgienv; // Not being used in this case
|
---|
450 | if (!recpt.parse_cgi_args (argstr, fileuploads, args, errout, fastcgienv)) {
|
---|
451 | errout.close();
|
---|
452 | ap_log_error("", 0, APLOG_ERR, r->server, "parse_cgi_args failed\n");
|
---|
453 | return 500;
|
---|
454 | }
|
---|
455 |
|
---|
456 | #ifdef GSDL_USE_OSTRINGSTREAM
|
---|
457 | ostringstream pageout;
|
---|
458 | #else
|
---|
459 | ostrstream pageout;
|
---|
460 | #endif
|
---|
461 |
|
---|
462 | // get http headers
|
---|
463 | text_tmap headers;
|
---|
464 | recpt.get_cgihead_info(args, headers, errout, fastcgienv);
|
---|
465 |
|
---|
466 | if (headers.find("Location") != headers.end()) {
|
---|
467 | // redirect
|
---|
468 | char *val = str_pool.get_cstr_from_pool(headers.find("Location")->second);
|
---|
469 | #if _APACHE_MOD >= 2
|
---|
470 | apr_table_set(r->headers_out, "location", val);
|
---|
471 | #else
|
---|
472 | ap_table_set(r->headers_out, "location", val);
|
---|
473 | #endif
|
---|
474 | return HTTP_MOVED_TEMPORARILY;
|
---|
475 | }
|
---|
476 |
|
---|
477 | text_tmap::iterator here = headers.begin();
|
---|
478 | text_tmap::iterator end = headers.end();
|
---|
479 | while (here != end) {
|
---|
480 | text_t namet = (*here).first;
|
---|
481 | lc(namet);
|
---|
482 | char *name = str_pool.get_cstr_from_pool(namet);
|
---|
483 | char *val = str_pool.get_cstr_from_pool((*here).second);
|
---|
484 |
|
---|
485 | if ((*here).first == "content-type") {
|
---|
486 | #if _APACHE_MOD < 2
|
---|
487 | r->content_type = val;
|
---|
488 | #else
|
---|
489 |
|
---|
490 | char* val_copy = strdup(val); // if note freed by r->content_type => Memory leak!
|
---|
491 | ap_set_content_type(r, val_copy);
|
---|
492 | #endif
|
---|
493 | } else if ((*here).first == "content-encoding") {
|
---|
494 | r->content_encoding = val;
|
---|
495 | } else {
|
---|
496 | #if _APACHE_MOD >= 2
|
---|
497 | apr_table_set(r->headers_out, name, val);
|
---|
498 | #else
|
---|
499 | ap_table_set(r->headers_out, name, val);
|
---|
500 | #endif
|
---|
501 | }
|
---|
502 |
|
---|
503 | here++;
|
---|
504 | }
|
---|
505 | ap_send_http_header(r);
|
---|
506 |
|
---|
507 | if (!r->header_only) {
|
---|
508 | if (!recpt.produce_content(args, pageout, errout)) {
|
---|
509 | ap_log_error("", 0, APLOG_ERR, r->server, "produce_content failed\n");
|
---|
510 | return 500;
|
---|
511 | }
|
---|
512 | #ifdef GSDL_USE_OSTRINGSTREAM
|
---|
513 | string out = pageout.str();
|
---|
514 | ap_rwrite(out.c_str(), out.size(), r);
|
---|
515 | #else
|
---|
516 | char *out = pageout.str();
|
---|
517 | ap_rwrite(out, pageout.pcount(), r);
|
---|
518 | pageout.rdbuf()->freeze(0);
|
---|
519 | #endif
|
---|
520 | }
|
---|
521 |
|
---|
522 | errout.close();
|
---|
523 |
|
---|
524 | return OK;
|
---|
525 | }
|
---|
526 |
|
---|
527 | #if _APACHE_MOD < 2
|
---|
528 |
|
---|
529 | static const handler_rec gsdl_handlers[] = {
|
---|
530 | { "gsdl", gsdl_handler },
|
---|
531 | { NULL, NULL }
|
---|
532 | };
|
---|
533 |
|
---|
534 |
|
---|
535 | extern "C" {
|
---|
536 | module MODULE_VAR_EXPORT gsdl_module = {
|
---|
537 | STANDARD_MODULE_STUFF,
|
---|
538 | NULL, /* module \initializer */
|
---|
539 | gsdl_create_dir_config, /* create per-dir config structures */
|
---|
540 | NULL, /* merge per-dir config structures */
|
---|
541 | gsdl_create_config, /* create per-server config structures */
|
---|
542 | NULL, /* merge per-server config structures */
|
---|
543 | gsdl_cmds, /* table of config file commands */
|
---|
544 | gsdl_handlers, /* [#8] MIME-typed-dispatched handlers */
|
---|
545 | NULL, /* [#1] URI to filename translation */
|
---|
546 | NULL, /* [#4] validate user id from request */
|
---|
547 | NULL, /* [#5] check if the user is ok _here_ */
|
---|
548 | NULL, /* [#3] check access by host address */
|
---|
549 | NULL, /* [#6] determine MIME type */
|
---|
550 | NULL, /* [#7] pre-run fixups */
|
---|
551 | NULL, /* [#9] log a transaction */
|
---|
552 | NULL, /* [#2] header parser */
|
---|
553 | gsdl_init, /* child_init */
|
---|
554 | NULL, /* child_exit */
|
---|
555 | NULL /* [#0] post read-request */
|
---|
556 | #ifdef EAPI
|
---|
557 | ,NULL, /* EAPI: add_module */
|
---|
558 | NULL, /* EAPI: remove_module */
|
---|
559 | NULL, /* EAPI: rewrite_command */
|
---|
560 | NULL, /* EAPI: new_connection */
|
---|
561 | NULL /* EAPI: close_connection */
|
---|
562 | #endif
|
---|
563 | };
|
---|
564 | };
|
---|
565 |
|
---|
566 | #else
|
---|
567 |
|
---|
568 | static void gsdl_register_hooks(ap_pool *p)
|
---|
569 | {
|
---|
570 | ap_hook_child_init(gsdl_init,NULL,NULL,APR_HOOK_MIDDLE);
|
---|
571 | ap_hook_handler(gsdl_handler, NULL, NULL, APR_HOOK_MIDDLE);
|
---|
572 |
|
---|
573 | }
|
---|
574 |
|
---|
575 | extern "C" {
|
---|
576 | module AP_MODULE_DECLARE_DATA gsdl_module = {
|
---|
577 | STANDARD20_MODULE_STUFF,
|
---|
578 | gsdl_create_dir_config, /* create per-dir config structures */
|
---|
579 | NULL, /* merge per-dir config structures */
|
---|
580 | gsdl_create_config, /* create per-server config structures */
|
---|
581 | NULL, /* merge per-server config structures */
|
---|
582 | gsdl_cmds, /* command handlers */
|
---|
583 | gsdl_register_hooks, /* set up other request processing hooks */
|
---|
584 | };
|
---|
585 | };
|
---|
586 | #endif
|
---|