[108] | 1 | /**********************************************************************
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| 2 | *
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| 3 | * cgiutils.cpp -- general cgi utilities
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| 4 | * Copyright (C) 1999 The New Zealand Digital Library Project
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| 5 | *
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[533] | 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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[108] | 9 | *
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[533] | 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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[108] | 24 | *********************************************************************/
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| 25 |
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| 26 | #include "cgiutils.h"
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[12513] | 27 | #include "fileutil.h"
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[3151] | 28 | #include "gsdlunicode.h"
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[11998] | 29 | #include "fileutil.h"
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[3217] | 30 | #include "unitool.h" // in mg, for output_utf8_char
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[18882] | 31 | #include <cstdlib>
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[22796] | 32 | #include <time.h>
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[108] | 33 |
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[12513] | 34 | #if defined(GSDL_USE_OBJECTSPACE)
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| 35 | # include <ospace\std\iostream>
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| 36 | # include <ospace\std\fstream>
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| 37 | #elif defined(GSDL_USE_IOS_H)
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| 38 | # include <iostream.h>
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| 39 | # include <fstream.h>
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| 40 | #else
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| 41 | # include <iostream>
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| 42 | # include <fstream>
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| 43 | #endif
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[11998] | 44 |
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[28841] | 45 | // set to false to undo security changes (url-encoding arguments)
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[28888] | 46 | static bool do_safe_cgi_args = false;
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[12513] | 47 |
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[108] | 48 | static unsigned short hexdigit (unsigned short c) {
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| 49 | if (c >= '0' && c <= '9') return (c-'0');
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| 50 | if (c >= 'a' && c <= 'f') return (c-'a'+10);
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| 51 | if (c >= 'A' && c <= 'F') return (c-'A'+10);
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| 52 | return c;
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| 53 | }
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| 54 |
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| 55 |
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| 56 | static void c2hex (unsigned short c, text_t &t) {
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| 57 | t.clear();
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| 58 |
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| 59 | if (c >= 256) {
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| 60 | t = "20"; // ' '
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| 61 | return;
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| 62 | }
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| 63 |
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| 64 | unsigned short o1, o2;
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| 65 |
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| 66 | o1 = (c/16) % 16;
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| 67 | o2 = c % 16;
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| 68 | if (o1 >= 10) o1 += 'a' - 10;
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| 69 | else o1 += '0';
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| 70 | if (o2 >= 10) o2 += 'a' - 10;
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| 71 | else o2 += '0';
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| 72 |
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| 73 | t.push_back(o1);
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| 74 | t.push_back(o2);
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| 75 | }
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| 76 |
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[12513] | 77 | static text_t::iterator getline (text_t::iterator first,
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| 78 | text_t::iterator last,
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| 79 | bool include_crlf) {
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| 80 | while (first != last) {
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| 81 | if (((first+1) != last) && (*first == 13) && (*(first+1) == 10)) {
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| 82 | // found <CRLF>
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| 83 | if (include_crlf) first += 2;
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| 84 | break;
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| 85 | }
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[12794] | 86 |
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[12513] | 87 | first++;
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| 88 | }
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[12794] | 89 |
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[12513] | 90 | return first;
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| 91 | }
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| 92 |
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| 93 | static void process_post_section (text_t &argname, text_t &argdata, text_t &filename, text_t &filedata,
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| 94 | text_t &filetype, bool &isfile, text_t &argstr,
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| 95 | fileupload_tmap &fileuploads, const text_t &gsdlhome) {
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| 96 |
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| 97 | if (!argname.empty()) {
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| 98 |
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| 99 | if (!isfile) {
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| 100 | // argdata includes a trailing <CRLF> that we must remove
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| 101 | if ((argdata.size() > 1) && (*(argdata.end()-2) == 13) && (*(argdata.end()-1) == 10)) {
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| 102 | argdata.erase(argdata.end()-2, argdata.end());
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| 103 | }
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| 104 | if (!argstr.empty()) argstr += "&";
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| 105 | argstr += argname + "=" + argdata;
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| 106 |
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| 107 | } else if (!filename.empty()) {
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| 108 | // filedata includes a trailing <CRLF> that we must remove
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| 109 | if ((filedata.size() > 1) && (*(filedata.end()-2) == 13) && (*(filedata.end()-1) == 10)) {
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| 110 | filedata.erase(filedata.end()-2, filedata.end());
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| 111 | }
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| 112 |
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[22791] | 113 | // create tmp_name for storing the file on disk, using the current timestamp
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| 114 | text_t tmp_name(time(NULL));
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[12513] | 115 | tmp_name = filename_cat(gsdlhome, "tmp", tmp_name);
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[12794] | 116 |
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[12513] | 117 | char *tmp_name_c = tmp_name.getcstr();
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| 118 |
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| 119 | // write the file data to disk
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| 120 | outconvertclass out;
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| 121 | ofstream filestream(tmp_name_c, ios::out | ios::binary);
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| 122 | filestream << out << filedata;
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| 123 | filestream.close();
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| 124 | delete tmp_name_c;
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| 125 |
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| 126 | // populate the fields of a fileupload_t and put it in the
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| 127 | // fileuploads map
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| 128 | fileupload_t fu;
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| 129 | // note that filename currently may or may not include the path since
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| 130 | // some browsers (e.g. IE) include the path while others
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| 131 | // (e.g. mozilla) do not. we should probably remove the path from
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| 132 | // this field here to get a consistent value across all browsers.
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| 133 | text_t::iterator slash = findlastchar(filename.begin(), filename.end(), '\\');
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| 134 | if (slash != filename.end()) {
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| 135 | filename = substr(slash+1, filename.end());
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| 136 | }
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| 137 | fu.name = filename;
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| 138 | fu.type = filetype;
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| 139 | // size has yet to be implemented
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[12579] | 140 | fu.size = filedata.size();
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[12794] | 141 |
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[12513] | 142 | fu.tmp_name = tmp_name;
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| 143 | fileuploads[argname] = fu;
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| 144 | }
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| 145 | }
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| 146 | isfile = false;
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| 147 | argname.clear();
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| 148 | argdata.clear();
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| 149 | filename.clear();
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| 150 | filedata.clear();
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| 151 | filetype.clear();
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| 152 | }
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| 153 |
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| 154 | // parse data obtained through a CGI POST request
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| 155 | text_t parse_post_data (text_t &content_type, text_t &raw_post_data,
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| 156 | fileupload_tmap &fileuploads, const text_t &gsdlhome) {
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| 157 |
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| 158 | text_t argstr;
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| 159 |
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| 160 | text_t::iterator content_type_begin = content_type.begin();
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| 161 | text_t::iterator content_type_end = content_type.end();
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| 162 | if (findword(content_type_begin, content_type_end, "multipart/form-data") == content_type_end) {
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| 163 | // a simple post request
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[12794] | 164 |
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[12513] | 165 | return raw_post_data;
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| 166 |
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| 167 | } else {
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| 168 | // multipart/form data - may contain one or more uploaded files
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| 169 |
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| 170 | /*
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| 171 | content_type should look something like the following
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| 172 | multipart/form-data; boundary=---------------------------7d411e1a50330
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| 173 |
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| 174 | while raw_post_data will be as follows
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| 175 | -----------------------------7d43e73450330CRLF
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| 176 | Content-Disposition: form-data; name="e"<CRLF>
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| 177 | <CRLF>
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| 178 | d-0testss--1-0-00---4----0--0-110--1en-Zz-1---10-about-0--00031-001utfZz-8-0<CRLF>
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| 179 | -----------------------------7d43e73450330<CRLF>
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| 180 | Content-Disposition: form-data; name="afile"; filename="C:\somedoc.doc"<CRLF>
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| 181 | Content-Type: application/msword<CRLF>
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| 182 | <CRLF>
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| 183 | <Content of file><CRLF>
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| 184 |
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| 185 | */
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| 186 |
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| 187 | // first get the boundary from content-type
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| 188 | text_t::iterator boundary_begin = findword(content_type_begin, content_type_end, "boundary=");
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[12794] | 189 | if (boundary_begin+9 < content_type_end)
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| 190 | {
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| 191 | // skip over "boundary=" part of string
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| 192 | boundary_begin += 9;
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| 193 | }
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[12513] | 194 | else {
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| 195 | // error
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[12796] | 196 | cerr << "Error: malformed boundary? '" << content_type << "'" << endl;
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[12513] | 197 | return "";
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| 198 | }
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| 199 | text_t boundary = substr(boundary_begin, getline(boundary_begin, content_type_end, false));
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| 200 | int boundary_len = boundary.size();
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| 201 |
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[12794] | 202 |
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[12513] | 203 | text_t argname, argdata, filename, filedata, filetype;
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| 204 | bool isfile = false;
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| 205 | text_t::iterator data_here = raw_post_data.begin();
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| 206 | text_t::iterator data_end = raw_post_data.end();
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| 207 | while (data_here != data_end) {
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| 208 |
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| 209 | // get the next available line (including the trailing <CRLF>
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| 210 | text_t line = substr(data_here, getline(data_here, data_end, true));
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[12794] | 211 |
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[12513] | 212 | data_here += line.size();
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| 213 | text_t::iterator line_begin = line.begin();
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| 214 | text_t::iterator line_end = line.end();
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| 215 | if (findword(line_begin, line_end, boundary) != line_end) {
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| 216 | // we've found a boundary
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| 217 | process_post_section(argname, argdata, filename, filedata, filetype,
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| 218 | isfile, argstr, fileuploads, gsdlhome);
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| 219 |
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| 220 | } else if (findword(line_begin, line_end, "Content-Disposition: form-data") != line_end) {
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| 221 | // we've found the the beginning of a new section
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| 222 | argname.clear();
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| 223 | argdata.clear();
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| 224 |
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| 225 | // get the name of this piece of form data
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| 226 | text_t::iterator it = findword(line_begin, line_end, "name=\"");
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| 227 | if (it == line_end) break; // error - this shouldn't happen
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| 228 | it = findchar(it, line_end, '"');
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| 229 | if ((it != line_end) && (it+1 != line_end)) {
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| 230 | argname = substr(it+1, findchar(it+1, line_end, '"'));
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| 231 | }
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| 232 |
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| 233 | // if this piece of form data contains filename="" it's a file
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| 234 | // upload and needs to be treated special
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| 235 | it = (findword(line_begin, line_end, "filename=\""));
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| 236 | if (it != line_end) {
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| 237 | // we've found a file upload
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| 238 | isfile = true;
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| 239 | it = findchar(it, line_end, '"');
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| 240 | if ((it != line_end) && (it+1 != line_end)) {
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| 241 | filename = substr(it+1, findchar(it+1, line_end, '"'));
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| 242 | }
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| 243 |
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| 244 | // the next line is the content-type of this section
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| 245 | line = substr(data_here, getline(data_here, data_end, true));
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| 246 | data_here += line.size();
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| 247 | line_begin = line.begin();
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| 248 | line_end = line.end();
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| 249 | it = (findword(line_begin, line_end, "Content-Type: "));
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| 250 | if (it != line_end) {
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| 251 | filetype = substr(it+14, getline(it, line_end, false));
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| 252 | }
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| 253 | }
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| 254 |
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| 255 | // eat up the next line as it's just a <CRLF> on it's own
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| 256 | data_here += 2;
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| 257 |
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| 258 | } else {
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| 259 | if (isfile) filedata += line;
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| 260 | else argdata += line;
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| 261 | }
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[12794] | 262 |
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[12513] | 263 | }
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| 264 |
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| 265 | // process last section
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| 266 | process_post_section(argname, argdata, filename, filedata, filetype,
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| 267 | isfile, argstr, fileuploads, gsdlhome);
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| 268 |
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| 269 | return argstr;
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| 270 | }
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| 271 | }
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| 272 |
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[108] | 273 | // convert %xx and + to their appropriate equivalents
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[3217] | 274 | // IE 6.0 and later use "%u" followed by 4 hex digits... MS IIS extension!
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[13461] | 275 | // NOTE: this method is crap. It assumes the input encoding is utf-8. If it
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| 276 | // actually was, then this returns utf-8, and needs to_uni on the
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| 277 | // result to get it back to unicode. If the encoding wasn't utf-8, then the
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| 278 | // output may be crap. Seems to work for 8 bit encodings.
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| 279 | // Really, this should be given the encoding, and should always return unicode.
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[108] | 280 | void decode_cgi_arg (text_t &argstr) {
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| 281 | text_t::iterator in = argstr.begin();
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| 282 | text_t::iterator out = in;
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| 283 | text_t::iterator end = argstr.end();
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| 284 |
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| 285 | while (in != end) {
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| 286 | if (*in == '+') *out = ' ';
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| 287 |
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| 288 | else if (*in == '%') {
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| 289 | unsigned short c = '%';
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[3151] | 290 | ++in;
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| 291 | if (in != end) { // this is an encoding...
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| 292 | if (*in == 'u') { // convert %uHHHH to unicode then current encoding
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| 293 | // this assumes a short int is at least 16 bits...
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| 294 | ++in;
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| 295 | if (in != end)
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| 296 | c=hexdigit(*in++) << 12;
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| 297 | if (in != end)
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| 298 | c+=hexdigit(*in++) << 8;
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| 299 | if (in != end)
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| 300 | c+=hexdigit(*in++) << 4;
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| 301 | if (in != end)
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| 302 | c+=hexdigit(*in);
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| 303 | /* BAD!! The following assumes the interface is using utf-8. But
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| 304 | at this point we don't know what encoding we are using, unless
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| 305 | we can parse it out of the string we are currently decoding... */
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| 306 | text_t uni=" ";
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| 307 | uni[0]=c;
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| 308 | text_t utf8=to_utf8(uni);
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| 309 | int last_byte=utf8.size()-1;
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[9620] | 310 | for (int i=0;i<last_byte;++i)
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[3151] | 311 | *out++ = utf8[i];
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| 312 | c=utf8[last_byte];
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| 313 | } else { // convert %HH to hex value
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| 314 | c = hexdigit (*in);
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| 315 | ++in;
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| 316 | if (in != end && c < 16) { // sanity check on the previous character
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| 317 | c = c*16 + hexdigit (*in);
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| 318 | }
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| 319 | }
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[108] | 320 | }
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| 321 | *out = c;
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| 322 | } else *out = *in;
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| 323 |
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[9620] | 324 | if (in != end) ++in;
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| 325 | ++out;
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[108] | 326 | }
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| 327 |
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| 328 | // remove the excess characters
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| 329 | argstr.erase (out, end);
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[13461] | 330 |
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[108] | 331 | }
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| 332 |
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[26539] | 333 | // Ensure dangerous tags and chars in cgi-args are URL encoded, to prevent obvious XSS attempts
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| 334 | // (e.g. c=<script>alert("hacked")</script>) and log poisoning (apache writes unrecognised URLs
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| 335 | // into log. If the user entered c=garbage <?php ...> in the URL, it gets written out into the
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| 336 | // apache log and that log file can be included in a local file inclusion (LFI) or
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| 337 | // remote file include (RFI) attack.
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| 338 | // This function encodes <>, &, ", ', / which are scripting chars or chars which can be used to
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| 339 | // break out of an html/XML/javascript context.
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[28841] | 340 | void safe_cgi_arg (const text_t &key, text_t &argstr) {
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| 341 | if(!do_safe_cgi_args) {
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| 342 | return;
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| 343 | }
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| 344 |
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[26539] | 345 | text_t::iterator in = argstr.begin();
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| 346 | text_t out = "";
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| 347 | text_t::iterator end = argstr.end();
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| 348 |
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| 349 | while (in != end) {
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| 350 | if (*in == '<') out += "%3C";
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| 351 | else if (*in == '>') out += "%3E";
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| 352 | else if (*in == '&') out += "%26";
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| 353 | else if (*in == '\"') out += "%22";
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| 354 | else if (*in == '\'') out += "%27";
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[26560] | 355 | //else if (*in == '/') out += "%2F"; //unfortunately URL-encoding / breaks subcollections, as this uses /
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[26539] | 356 | else { // append whatever char is in *in, but as a char, not int
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| 357 | //out += *in; // appends as int
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[28841] | 358 | out.push_back(*in);
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[26539] | 359 | }
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| 360 | ++in;
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| 361 | }
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| 362 |
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| 363 | argstr.erase (argstr.begin(), end);
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| 364 | argstr += out;
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| 365 | }
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[108] | 366 |
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[28841] | 367 |
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| 368 | // given a list of characters (or "all") to decode, and given the string, str, where those
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| 369 | // characters are to be decoded, this method replaces any occurrences of the url-encoded
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| 370 | // variants of those characters with their actual characters in the given string str.
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| 371 | void unsafe_cgi_arg(const text_t &chars, text_t &str) {
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| 372 | if(!do_safe_cgi_args) {
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| 373 | return;
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| 374 | }
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| 375 |
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| 376 | text_t allchars = "<>&\"\'/";
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| 377 |
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| 378 | text_t chars_to_decode = (chars == "all" || chars == "ALL") ? allchars : chars;
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| 379 |
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| 380 | text_t::iterator in = chars_to_decode.begin();
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| 381 | text_t::iterator end = chars_to_decode.end();
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| 382 |
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| 383 | char hex_char[4];
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| 384 |
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| 385 | // using sprint to urlencode a character. See http://www.programmingforums.org/thread15443.html
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| 386 |
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| 387 | while (in != end) {
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| 388 |
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| 389 | // *in is a character from the accepted list of chars_to_decode list
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| 390 |
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| 391 | // 1. create the url-encoded value of the char *in in variable hex_char
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| 392 | // sprintf adds in a null byte at the end
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| 393 | sprintf(hex_char,"%%%02X",*in);
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| 394 |
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| 395 | // 2. Need the actual char to be decoded as a text_t string, so we can do a string replace with it
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| 396 | text_t tmp = "";
|
---|
| 397 | tmp.push_back(*in);
|
---|
| 398 |
|
---|
| 399 | // 3. replaces occurrences of hex_char (the url_encoded version of the char *in) in str with its decoded version
|
---|
| 400 | str.replace(hex_char, tmp);
|
---|
| 401 |
|
---|
| 402 | ++in;
|
---|
| 403 | }
|
---|
| 404 | }
|
---|
| 405 |
|
---|
| 406 |
|
---|
[108] | 407 | // split up the cgi arguments
|
---|
[776] | 408 | void split_cgi_args (const cgiargsinfoclass &argsinfo, text_t argstr,
|
---|
| 409 | cgiargsclass &args) {
|
---|
[108] | 410 | args.clear();
|
---|
| 411 |
|
---|
[7432] | 412 | text_t::const_iterator here = argstr.begin();
|
---|
| 413 | text_t::const_iterator end = argstr.end();
|
---|
[30373] | 414 | // get seems to be not unicode, while post is, so don't want to just assume encoding is 1 (not unicode)
|
---|
| 415 | unsigned short args_encoding = argstr.getencoding();
|
---|
| 416 | cerr << "args enc = "<< args_encoding<<endl;
|
---|
[108] | 417 | text_t key, value;
|
---|
[11998] | 418 |
|
---|
[108] | 419 | // extract out the key=value pairs
|
---|
| 420 | while (here != end) {
|
---|
| 421 | // get the next key and value pair
|
---|
| 422 | here = getdelimitstr (here, end, '=', key);
|
---|
| 423 | here = getdelimitstr (here, end, '&', value);
|
---|
| 424 |
|
---|
| 425 | // convert %xx and + to their appropriate equivalents
|
---|
[614] | 426 | decode_cgi_arg (value);
|
---|
[26539] | 427 |
|
---|
[28841] | 428 | safe_cgi_arg(key, value); // mitigate obvious cross-site scripting hacks in URL cgi-params
|
---|
[26539] | 429 |
|
---|
[30373] | 430 | value.setencoding(args_encoding); //1 // other encoding
|
---|
[108] | 431 | // store this key=value pair
|
---|
[764] | 432 | if (!key.empty()) {
|
---|
[2426] | 433 |
|
---|
| 434 | // if arg occurs multiple times (as is the case with multiple
|
---|
| 435 | // checkboxes using the same name) we'll create a comma separated
|
---|
| 436 | // list of all the values (this uses a hack that encodes naturally
|
---|
| 437 | // occurring commas as %2C - values will therefore need to be decoded
|
---|
| 438 | // again before use) - it should use an array instead
|
---|
[2417] | 439 | const cgiarginfo *info = argsinfo.getarginfo (key);
|
---|
[12562] | 440 | if (info==NULL) {
|
---|
| 441 | // If info is NULL, we can't tell if the arg is multiple value or not
|
---|
| 442 | // Because we need to have dynamically named arguments multivalued, we
|
---|
| 443 | // will always assume multiplevalue = true
|
---|
| 444 | // If the arg is not multi valued, then you need to decode the commas.
|
---|
| 445 | if (args.getarg(key)==NULL) {
|
---|
[30373] | 446 | // encode_commas returns a text_t without encoding bit set
|
---|
| 447 | text_t newvalue = encode_commas(value);
|
---|
| 448 | newvalue.setencoding(args_encoding);
|
---|
| 449 | args.setarg (key, newvalue, cgiarg_t::cgi_arg);
|
---|
[12562] | 450 | }
|
---|
| 451 | else {
|
---|
| 452 | text_t newvalue = args[key];
|
---|
[2417] | 453 |
|
---|
[12562] | 454 | newvalue += "," + encode_commas(value);
|
---|
[30373] | 455 | newvalue.setencoding(args_encoding); // other encoding
|
---|
[12562] | 456 | args.setarg (key, newvalue, cgiarg_t::cgi_arg);
|
---|
| 457 | }
|
---|
[2417] | 458 | }
|
---|
[12562] | 459 | else {
|
---|
| 460 | if (info->multiplevalue) {
|
---|
| 461 |
|
---|
| 462 | text_t newvalue = args[key];
|
---|
| 463 | if (args.lookupcgiarg(key).source == cgiarg_t::cgi_arg) newvalue += ",";
|
---|
| 464 | newvalue += encode_commas(value);
|
---|
[30373] | 465 | newvalue.setencoding(args_encoding); // other encoding
|
---|
[12562] | 466 | args.setarg (key, newvalue, cgiarg_t::cgi_arg);
|
---|
| 467 |
|
---|
| 468 | } else {
|
---|
| 469 | args.setarg (key, value, cgiarg_t::cgi_arg);
|
---|
| 470 | }
|
---|
| 471 | }
|
---|
[764] | 472 | }
|
---|
[108] | 473 | }
|
---|
| 474 | }
|
---|
| 475 |
|
---|
[2426] | 476 | text_t encode_commas (const text_t &intext) {
|
---|
| 477 |
|
---|
| 478 | text_t outtext;
|
---|
| 479 |
|
---|
| 480 | text_t::const_iterator here = intext.begin ();
|
---|
| 481 | text_t::const_iterator end = intext.end ();
|
---|
| 482 |
|
---|
| 483 | while (here != end) {
|
---|
| 484 | if (*here == ',') outtext += "%2C";
|
---|
| 485 | else outtext.push_back (*here);
|
---|
[9620] | 486 | ++here;
|
---|
[2426] | 487 | }
|
---|
| 488 | return outtext;
|
---|
| 489 | }
|
---|
| 490 |
|
---|
| 491 | text_t decode_commas (const text_t &intext) {
|
---|
| 492 |
|
---|
| 493 | text_t outtext;
|
---|
| 494 |
|
---|
| 495 | text_t::const_iterator here = intext.begin ();
|
---|
| 496 | text_t::const_iterator end = intext.end ();
|
---|
| 497 |
|
---|
[22942] | 498 | // for loop
|
---|
| 499 | int intext_len = intext.size();
|
---|
| 500 | for(int i = 0; i < intext_len; i++) {
|
---|
| 501 | if ((i+2)<intext_len) {
|
---|
| 502 | if(intext[i] == '%' && intext[i+1] == '2'
|
---|
| 503 | && (intext[i+2] == 'C' || intext[i+2] == 'c')) {
|
---|
| 504 | i += 2;
|
---|
| 505 | outtext.push_back(',');
|
---|
| 506 | continue;
|
---|
| 507 | }
|
---|
| 508 | }
|
---|
| 509 | outtext.push_back (intext[i]);
|
---|
| 510 | }
|
---|
| 511 | return outtext;
|
---|
[2426] | 512 | }
|
---|
| 513 |
|
---|
[13456] | 514 | // set utf8 to true if input is in utf-8, otherwise expects input in unicode
|
---|
| 515 | text_t minus_safe (const text_t &intext, bool utf8) {
|
---|
[607] | 516 |
|
---|
| 517 | text_t outtext;
|
---|
| 518 |
|
---|
| 519 | text_t::const_iterator here = intext.begin ();
|
---|
| 520 | text_t::const_iterator end = intext.end ();
|
---|
| 521 |
|
---|
| 522 | while (here != end) {
|
---|
[1504] | 523 | if (*here == '-') outtext += "Zz-";
|
---|
[607] | 524 | else outtext.push_back (*here);
|
---|
[9620] | 525 | ++here;
|
---|
[607] | 526 | }
|
---|
[13456] | 527 | if (utf8) {
|
---|
| 528 | outtext = cgi_safe_utf8 (outtext);
|
---|
| 529 | } else {
|
---|
| 530 | outtext = cgi_safe_unicode (outtext);
|
---|
| 531 | }
|
---|
[607] | 532 | return outtext;
|
---|
| 533 | }
|
---|
| 534 |
|
---|
[13456] | 535 | // takes utf-8 input
|
---|
| 536 | text_t cgi_safe_utf8 (const text_t &intext) {
|
---|
[108] | 537 | text_t outtext;
|
---|
| 538 |
|
---|
| 539 | text_t::const_iterator here = intext.begin ();
|
---|
| 540 | text_t::const_iterator end = intext.end ();
|
---|
| 541 | unsigned short c;
|
---|
| 542 | text_t ttmp;
|
---|
| 543 |
|
---|
| 544 | while (here != end) {
|
---|
| 545 | c = *here;
|
---|
| 546 | if (((c >= 'a') && (c <= 'z')) ||
|
---|
| 547 | ((c >= 'A') && (c <= 'Z')) ||
|
---|
[474] | 548 | ((c >= '0') && (c <= '9')) ||
|
---|
[13456] | 549 | (c == '%') || (c == '-')) {
|
---|
[108] | 550 | // alphanumeric character
|
---|
| 551 | outtext.push_back(c);
|
---|
| 552 | } else if (c == ' ') {
|
---|
| 553 | // space
|
---|
[150] | 554 | outtext.push_back('+');
|
---|
[13456] | 555 | } else if (c > 255) { // not utf-8 character
|
---|
| 556 | cerr << "WARNING: expected utf-8 char, but got unicode!!\n";
|
---|
| 557 | } else {
|
---|
| 558 | // everything else
|
---|
| 559 | outtext.push_back('%');
|
---|
| 560 | c2hex(c, ttmp);
|
---|
| 561 | outtext += ttmp;
|
---|
| 562 | }
|
---|
| 563 |
|
---|
| 564 | ++here;
|
---|
| 565 | }
|
---|
| 566 |
|
---|
| 567 | return outtext;
|
---|
| 568 | }
|
---|
| 569 | // takes unicode input
|
---|
| 570 | text_t cgi_safe_unicode (const text_t &intext) {
|
---|
| 571 | text_t outtext;
|
---|
| 572 |
|
---|
| 573 | text_t::const_iterator here = intext.begin ();
|
---|
| 574 | text_t::const_iterator end = intext.end ();
|
---|
| 575 | unsigned short c;
|
---|
| 576 | text_t ttmp;
|
---|
| 577 |
|
---|
| 578 | while (here != end) {
|
---|
| 579 | c = *here;
|
---|
| 580 | if (((c >= 'a') && (c <= 'z')) ||
|
---|
| 581 | ((c >= 'A') && (c <= 'Z')) ||
|
---|
| 582 | ((c >= '0') && (c <= '9')) ||
|
---|
| 583 | (c == '%') || (c == '-')) {
|
---|
| 584 | // alphanumeric character
|
---|
| 585 | outtext.push_back(c);
|
---|
| 586 | } else if (c == ' ') {
|
---|
| 587 | // space
|
---|
| 588 | outtext.push_back('+');
|
---|
[13103] | 589 | } else if (c > 127) { // unicode character
|
---|
[3217] | 590 | unsigned char buf[3]; // up to 3 bytes
|
---|
| 591 | buf[0]='\0';buf[1]='\0';buf[2]='\0';
|
---|
| 592 | output_utf8_char(c,buf, buf+2);
|
---|
| 593 | outtext.push_back('%');
|
---|
| 594 | c2hex(buf[0], ttmp);
|
---|
| 595 | outtext += ttmp;
|
---|
| 596 | outtext.push_back('%');
|
---|
| 597 | c2hex(buf[1], ttmp);
|
---|
| 598 | outtext += ttmp;
|
---|
| 599 | if (buf[2]) {
|
---|
| 600 | outtext.push_back('%');
|
---|
| 601 | c2hex(buf[2], ttmp);
|
---|
| 602 | outtext += ttmp;
|
---|
| 603 | }
|
---|
[108] | 604 | } else {
|
---|
| 605 | // everything else
|
---|
| 606 | outtext.push_back('%');
|
---|
| 607 | c2hex(c, ttmp);
|
---|
| 608 | outtext += ttmp;
|
---|
| 609 | }
|
---|
| 610 |
|
---|
[9620] | 611 | ++here;
|
---|
[108] | 612 | }
|
---|
| 613 |
|
---|
| 614 | return outtext;
|
---|
| 615 | }
|
---|
[155] | 616 |
|
---|
| 617 |
|
---|
| 618 |
|
---|
| 619 |
|
---|
| 620 | static text_t::const_iterator get_next_save_arg (text_t::const_iterator first,
|
---|
| 621 | text_t::const_iterator last,
|
---|
| 622 | text_t &argname) {
|
---|
| 623 | first = getdelimitstr (first, last, '-', argname);
|
---|
| 624 | return first;
|
---|
| 625 | }
|
---|
| 626 |
|
---|
| 627 |
|
---|
| 628 | // check_save_conf_str checks the configuration string for
|
---|
| 629 | // the saved args and makes sure it does not conflict with
|
---|
| 630 | // the information about the arguments. If an error is encountered
|
---|
| 631 | // it will return false and the program should not produce any
|
---|
| 632 | // output.
|
---|
| 633 | bool check_save_conf_str (const text_t &saveconf,
|
---|
| 634 | const cgiargsinfoclass &argsinfo,
|
---|
| 635 | ostream &logout) {
|
---|
| 636 | outconvertclass text_t2ascii;
|
---|
| 637 |
|
---|
| 638 | text_tset argsset;
|
---|
| 639 | text_t::const_iterator saveconfhere = saveconf.begin ();
|
---|
| 640 | text_t::const_iterator saveconfend = saveconf.end ();
|
---|
| 641 | text_t argname;
|
---|
| 642 | const cgiarginfo *info;
|
---|
| 643 |
|
---|
| 644 | // first check to make sure all saved arguments can be saved
|
---|
| 645 |
|
---|
| 646 | while (saveconfhere != saveconfend) {
|
---|
| 647 | saveconfhere = get_next_save_arg (saveconfhere, saveconfend, argname);
|
---|
| 648 |
|
---|
| 649 | if (!argname.empty()) {
|
---|
| 650 | // save the argument name for later
|
---|
| 651 | argsset.insert (argname);
|
---|
| 652 |
|
---|
| 653 | // check the argument
|
---|
| 654 | info = argsinfo.getarginfo (argname);
|
---|
| 655 | if (info == NULL) {
|
---|
| 656 | logout << text_t2ascii << "Error: the cgi argument \"" << argname
|
---|
| 657 | << "\" is used in the configuration string for the\n"
|
---|
| 658 | << "saved arguments but does not exist as a valid argument.\n\n";
|
---|
| 659 | return false;
|
---|
| 660 | }
|
---|
| 661 | if (info->savedarginfo == cgiarginfo::mustnot) {
|
---|
| 662 | logout << text_t2ascii << "Error: the cgi argument \"" << argname
|
---|
| 663 | << "\" is used in the configuration string for the\n"
|
---|
| 664 | << "saved arguments but has been specified as an argument whose\n"
|
---|
| 665 | << "state must not be saved.\n\n";
|
---|
| 666 | return false;
|
---|
| 667 | }
|
---|
| 668 | }
|
---|
| 669 | }
|
---|
| 670 |
|
---|
| 671 |
|
---|
| 672 | // next check that all saved arguments that should be saved
|
---|
| 673 | // are saved
|
---|
| 674 | cgiargsinfoclass::const_iterator argsinfohere = argsinfo.begin ();
|
---|
| 675 | cgiargsinfoclass::const_iterator argsinfoend = argsinfo.end ();
|
---|
| 676 |
|
---|
| 677 | while (argsinfohere != argsinfoend) {
|
---|
| 678 | if (((*argsinfohere).second.savedarginfo == cgiarginfo::must) &&
|
---|
| 679 | (argsset.find((*argsinfohere).second.shortname) == argsset.end())) {
|
---|
| 680 | logout << text_t2ascii << "Error: the cgi argument \""
|
---|
| 681 | << (*argsinfohere).second.shortname << "\" was specified as needing to\n"
|
---|
| 682 | << "be save but was not listed in the saved arguments.\n\n";
|
---|
| 683 | return false;
|
---|
| 684 | }
|
---|
| 685 |
|
---|
[9620] | 686 | ++argsinfohere;
|
---|
[155] | 687 | }
|
---|
| 688 |
|
---|
| 689 | return true; // made it, no clashes
|
---|
| 690 | }
|
---|
| 691 |
|
---|
| 692 |
|
---|
| 693 | // create_save_conf_str will create a configuration string
|
---|
| 694 | // based on the information in argsinfo. This method of configuration
|
---|
| 695 | // is not recomended as small changes can produce large changes in
|
---|
| 696 | // the resulting configuration string (for instance a totally different
|
---|
| 697 | // ordering). Only arguments which "must" be saved are included in
|
---|
| 698 | // the resulting string.
|
---|
| 699 | text_t create_save_conf_str (const cgiargsinfoclass &argsinfo,
|
---|
| 700 | ostream &/*logout*/) {
|
---|
| 701 | cgiargsinfoclass::const_iterator argsinfohere = argsinfo.begin ();
|
---|
| 702 | cgiargsinfoclass::const_iterator argsinfoend = argsinfo.end ();
|
---|
| 703 | text_t saveconf;
|
---|
| 704 | bool first = true;
|
---|
| 705 |
|
---|
| 706 | while (argsinfohere != argsinfoend) {
|
---|
| 707 | // save this argument if it must be saved
|
---|
| 708 | if ((*argsinfohere).second.savedarginfo == cgiarginfo::must) {
|
---|
| 709 | if (!first) saveconf.push_back ('-');
|
---|
| 710 | else first = false;
|
---|
| 711 | saveconf += (*argsinfohere).second.shortname;
|
---|
| 712 | }
|
---|
| 713 |
|
---|
[9620] | 714 | ++argsinfohere;
|
---|
[155] | 715 | }
|
---|
| 716 |
|
---|
| 717 | return saveconf;
|
---|
| 718 | }
|
---|
| 719 |
|
---|
| 720 |
|
---|
| 721 | // expand_save_args will expand the saved arguments based
|
---|
| 722 | // on saveconf placing the results in args if they are not
|
---|
| 723 | // already defined. If it encounters an error it will return false
|
---|
| 724 | // and output more information to logout.
|
---|
| 725 | bool expand_save_args (const cgiargsinfoclass &argsinfo,
|
---|
| 726 | const text_t &saveconf,
|
---|
| 727 | cgiargsclass &args,
|
---|
| 728 | ostream &logout) {
|
---|
| 729 | outconvertclass text_t2ascii;
|
---|
| 730 |
|
---|
| 731 | text_t *arg_e = args.getarg("e");
|
---|
| 732 | if (arg_e == NULL) return true; // no compressed arguments
|
---|
| 733 | if (arg_e->empty()) return true; // no compressed arguments
|
---|
| 734 |
|
---|
| 735 | text_t argname, argvalue;
|
---|
| 736 | const cgiarginfo *argnameinfo;
|
---|
| 737 |
|
---|
| 738 | text_t::const_iterator saveconfhere = saveconf.begin();
|
---|
| 739 | text_t::const_iterator saveconfend = saveconf.end();
|
---|
| 740 |
|
---|
[11259] | 741 | text_t::iterator arg_ebegin = arg_e->begin();
|
---|
[155] | 742 | text_t::iterator arg_eend = arg_e->end();
|
---|
[11259] | 743 | text_t::iterator arg_ehere = arg_ebegin;
|
---|
[155] | 744 | while (saveconfhere != saveconfend && arg_ehere != arg_eend) {
|
---|
| 745 | saveconfhere = get_next_save_arg (saveconfhere, saveconfend, argname);
|
---|
| 746 |
|
---|
| 747 | if (!argname.empty()) {
|
---|
| 748 | // found another entry
|
---|
| 749 | argnameinfo = argsinfo.getarginfo (argname);
|
---|
| 750 |
|
---|
| 751 | if (argnameinfo == NULL) {
|
---|
| 752 | // no information about the argument could be found
|
---|
| 753 | // we can't keep going because we don't know whether
|
---|
| 754 | // this argument is a single or multiple character value
|
---|
| 755 | logout << text_t2ascii << "Error: the cgi argument \"" << argname
|
---|
| 756 | << "\" was specified as being a compressed argument\n"
|
---|
| 757 | << "but no information about it could be found within the "
|
---|
| 758 | << "cgiargsinfoclass.\n";
|
---|
| 759 | return false;
|
---|
| 760 |
|
---|
| 761 | } else {
|
---|
[294] | 762 |
|
---|
[155] | 763 | // found the argument information
|
---|
| 764 | if (argnameinfo->multiplechar) {
|
---|
[607] | 765 | text_t::const_iterator sav = arg_ehere;
|
---|
[155] | 766 | arg_ehere = getdelimitstr (arg_ehere, arg_eend, '-', argvalue);
|
---|
[11259] | 767 | if (distance(arg_ebegin, arg_ehere) > 2) {
|
---|
| 768 | // replace any '-' chars escaped with 'Zz'
|
---|
| 769 | bool first = true;
|
---|
| 770 | while ((*(arg_ehere-3) == 'Z') && (*(arg_ehere-2) == 'z')) {
|
---|
| 771 | if (first) argvalue.clear();
|
---|
[21997] | 772 |
|
---|
| 773 | // Hey, here's a wild idea. Why don't we check that there is
|
---|
| 774 | // another hyphen in the cgiarge before we get a pointer to it and
|
---|
| 775 | // add one. That way we are far less likely to wander off into
|
---|
| 776 | // random memory merrily parsing arguments that are then lovingly
|
---|
| 777 | // spewed all over the HTML page returned at the usage logs.
|
---|
| 778 | text_t::iterator minus_itr = findchar (arg_ehere, arg_eend, '-');
|
---|
| 779 | if (minus_itr == arg_eend)
|
---|
| 780 | {
|
---|
| 781 | logout << text_t2ascii << "Error: the cgi argument \"" << argname << "\" was specified as being a compressed argument but we have run out of cgiarge to decompress!\n";
|
---|
| 782 | return false;
|
---|
| 783 | }
|
---|
| 784 | arg_ehere = minus_itr + 1;
|
---|
| 785 |
|
---|
[11259] | 786 | while (sav != (arg_ehere-1)) {
|
---|
| 787 | if (!((*sav == 'Z') && (*(sav+1) == 'z') && (*(sav+2) == '-')) &&
|
---|
| 788 | !((*(sav-1) == 'Z') && (*sav == 'z') && (*(sav+1) == '-'))) argvalue.push_back (*sav);
|
---|
| 789 | ++sav;
|
---|
| 790 | }
|
---|
| 791 | first = false;
|
---|
[607] | 792 | }
|
---|
| 793 | }
|
---|
[294] | 794 | argvalue.setencoding(1); // other encoding
|
---|
[366] | 795 | if (!argvalue.empty()) args.setdefaultarg (argname, argvalue, cgiarg_t::compressed_arg);
|
---|
[155] | 796 | } else {
|
---|
[366] | 797 | args.setdefaultcarg (argname,*arg_ehere, cgiarg_t::compressed_arg);
|
---|
[9620] | 798 | ++arg_ehere;
|
---|
[155] | 799 | }
|
---|
| 800 | }
|
---|
| 801 | }
|
---|
| 802 | }
|
---|
| 803 |
|
---|
| 804 | return true;
|
---|
| 805 | }
|
---|
| 806 |
|
---|
| 807 |
|
---|
| 808 | // adds the default values for those arguments which have not
|
---|
| 809 | // been specified
|
---|
| 810 | void add_default_args (const cgiargsinfoclass &argsinfo,
|
---|
| 811 | cgiargsclass &args,
|
---|
| 812 | ostream &/*logout*/) {
|
---|
| 813 | cgiargsinfoclass::const_iterator argsinfohere = argsinfo.begin ();
|
---|
| 814 | cgiargsinfoclass::const_iterator argsinfoend = argsinfo.end ();
|
---|
| 815 |
|
---|
| 816 | while (argsinfohere != argsinfoend) {
|
---|
| 817 | if ((*argsinfohere).second.defaultstatus != cgiarginfo::none) {
|
---|
| 818 | args.setdefaultarg ((*argsinfohere).second.shortname,
|
---|
[366] | 819 | (*argsinfohere).second.argdefault, cgiarg_t::default_arg);
|
---|
[155] | 820 | }
|
---|
[9620] | 821 | ++argsinfohere;
|
---|
[155] | 822 | }
|
---|
| 823 | }
|
---|
| 824 |
|
---|
[12513] | 825 | void add_fileupload_args (const cgiargsinfoclass &argsinfo,
|
---|
| 826 | cgiargsclass &args,
|
---|
| 827 | fileupload_tmap &fileuploads,
|
---|
| 828 | ostream &logout) {
|
---|
| 829 |
|
---|
| 830 | const cgiarginfo *info = argsinfo.getarginfo("a");
|
---|
| 831 | fileupload_tmap::const_iterator this_file = fileuploads.begin();
|
---|
| 832 | fileupload_tmap::const_iterator end_file = fileuploads.end();
|
---|
| 833 | while (this_file != end_file) {
|
---|
| 834 | const cgiarginfo *info = argsinfo.getarginfo((*this_file).first);
|
---|
| 835 | if (info != NULL) {
|
---|
[12794] | 836 |
|
---|
[12513] | 837 | if ((*info).fileupload && (file_exists((*this_file).second.tmp_name))) {
|
---|
[12794] | 838 |
|
---|
[12513] | 839 | args.setargfile((*this_file).first, (*this_file).second);
|
---|
| 840 | }
|
---|
| 841 | }
|
---|
| 842 | this_file++;
|
---|
| 843 | }
|
---|
| 844 | }
|
---|
[155] | 845 |
|
---|
| 846 | // compress_save_args will compress the arguments and return
|
---|
| 847 | // them in compressed_args. If an error was encountered
|
---|
| 848 | // compressed_args will be set to to "", an error will be
|
---|
| 849 | // written to logout, and the function will return false.
|
---|
| 850 | bool compress_save_args (const cgiargsinfoclass &argsinfo,
|
---|
| 851 | const text_t &saveconf,
|
---|
| 852 | cgiargsclass &args,
|
---|
| 853 | text_t &compressed_args,
|
---|
[294] | 854 | outconvertclass &outconvert,
|
---|
[155] | 855 | ostream &logout) {
|
---|
| 856 | outconvertclass text_t2ascii;
|
---|
| 857 |
|
---|
| 858 | compressed_args.clear();
|
---|
| 859 |
|
---|
| 860 | text_t argname, argvalue;
|
---|
| 861 | const cgiarginfo *argnameinfo;
|
---|
| 862 |
|
---|
| 863 | text_t::const_iterator saveconfhere = saveconf.begin();
|
---|
| 864 | text_t::const_iterator saveconfend = saveconf.end();
|
---|
| 865 |
|
---|
| 866 | while (saveconfhere != saveconfend) {
|
---|
| 867 | saveconfhere = get_next_save_arg (saveconfhere, saveconfend, argname);
|
---|
| 868 |
|
---|
| 869 | if (!argname.empty()) {
|
---|
| 870 | // found another entry
|
---|
| 871 | argnameinfo = argsinfo.getarginfo (argname);
|
---|
| 872 |
|
---|
| 873 | if (argnameinfo == NULL) {
|
---|
| 874 | // no information about the argument could be found
|
---|
| 875 | // we can't keep going because we don't know whether
|
---|
| 876 | // this argument is a single or multiple character value
|
---|
| 877 | logout << text_t2ascii << "Error: the cgi argument \"" << argname
|
---|
| 878 | << "\" was specified as being a compressed argument\n"
|
---|
| 879 | << "but no information about it could be found within the "
|
---|
| 880 | << "cgiargsinfoclass.\n";
|
---|
| 881 | compressed_args.clear();
|
---|
| 882 | return false;
|
---|
| 883 |
|
---|
| 884 | } else {
|
---|
| 885 | // found the argument information
|
---|
| 886 | if (argnameinfo->multiplechar) {
|
---|
[607] | 887 | // multiple character argument -- sort out any '-' chars
|
---|
[9674] | 888 | if (args["w"]=="utf-16be") // browsers don't like \0 in urls...
|
---|
[13456] | 889 | compressed_args += minus_safe (args[argname], false);
|
---|
[3670] | 890 | else
|
---|
[13456] | 891 | compressed_args += minus_safe (outconvert.convert(args[argname]), true);
|
---|
| 892 |
|
---|
[155] | 893 | if (saveconfhere != saveconfend) compressed_args.push_back ('-');
|
---|
| 894 |
|
---|
| 895 | } else {
|
---|
| 896 | // single character argument
|
---|
| 897 | if (args[argname].size() == 0) {
|
---|
| 898 | logout << text_t2ascii << "Error: the cgi argument \"" << argname
|
---|
| 899 | << "\" was specified as being a compressed argument which\n"
|
---|
| 900 | << "should have a one character value but it was empty.\n\n";
|
---|
| 901 | compressed_args.clear ();
|
---|
| 902 | return false;
|
---|
| 903 |
|
---|
| 904 | } else if (args[argname].size() > 1) {
|
---|
| 905 | logout << text_t2ascii << "Error: the cgi argument \"" << argname
|
---|
| 906 | << "\" was specified as being a compressed argument which\n"
|
---|
| 907 | << "should have a one character value but it had multiple characters.\n\n";
|
---|
| 908 | compressed_args.clear ();
|
---|
| 909 | return false;
|
---|
| 910 | }
|
---|
| 911 |
|
---|
| 912 | // everything is ok
|
---|
| 913 | compressed_args += args[argname];
|
---|
| 914 | }
|
---|
| 915 | }
|
---|
| 916 | }
|
---|
| 917 | }
|
---|
| 918 |
|
---|
| 919 | return true;
|
---|
| 920 | }
|
---|
| 921 |
|
---|
| 922 |
|
---|
| 923 | // args_tounicode converts any arguments which are not in unicode
|
---|
| 924 | // to unicode using inconvert
|
---|
| 925 | void args_tounicode (cgiargsclass &args, inconvertclass &inconvert) {
|
---|
| 926 | cgiargsclass::iterator here = args.begin();
|
---|
| 927 | cgiargsclass::iterator end = args.end();
|
---|
| 928 |
|
---|
| 929 | while (here != end) {
|
---|
[366] | 930 | if ((*here).second.value.getencoding() > 0) {
|
---|
[21961] | 931 | // Call reset() before converting each argument, to prevent problems when converting the last
|
---|
| 932 | // argument left the converter in a bad state
|
---|
| 933 | inconvert.reset();
|
---|
[366] | 934 | (*here).second.value = inconvert.convert((*here).second.value);
|
---|
[155] | 935 | }
|
---|
| 936 |
|
---|
[9620] | 937 | ++here;
|
---|
[155] | 938 | }
|
---|
| 939 | }
|
---|
[873] | 940 |
|
---|
| 941 | // fcgienv will be loaded with environment name-value pairs
|
---|
| 942 | // if using fastcgi (had to do this as getenv doesn't work
|
---|
| 943 | // with our implementation of fastcgi). if fcgienv is empty
|
---|
| 944 | // we'll simply use getenv
|
---|
| 945 | text_t gsdl_getenv (const text_t &name, text_tmap &fcgienv) {
|
---|
| 946 | if (fcgienv.empty()) {
|
---|
| 947 | char *n = name.getcstr();
|
---|
| 948 | char *v = getenv(n);
|
---|
[7432] | 949 | delete []n;
|
---|
[873] | 950 | if (v != NULL) return v;
|
---|
[7432] | 951 | return g_EmptyText;
|
---|
[873] | 952 |
|
---|
| 953 | } else return fcgienv[name];
|
---|
| 954 | }
|
---|