1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
|
//
// libavg - Media Playback Engine.
// Copyright (C) 2003-2014 Ulrich von Zadow
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
//
// Current versions can be found at www.libavg.de
//
#include "XMLHelper.h"
#include "Exception.h"
#include "Logger.h"
#include <libxml/parserInternals.h>
#include <cstring>
#include <iostream>
using namespace std;
namespace avg {
string getXmlChildrenAsString(const xmlDocPtr xmlDoc, const xmlNodePtr& xmlNode)
{
string s;
xmlBufferPtr pBuffer = xmlBufferCreate();
xmlNodeDump(pBuffer, xmlDoc, xmlNode, 0, 0);
s = (const char *)xmlBufferContent(pBuffer);
size_t StartPos = s.find('>')+1;
size_t EndPos = s.rfind('<')-1;
if (StartPos > EndPos) {
s = "";
} else {
s = s.substr(StartPos, EndPos-StartPos+1);
}
xmlBufferFree(pBuffer);
return s;
}
static xmlExternalEntityLoader DefaultLoaderProc = 0;
static std::map<string, string> g_DTDMap;
xmlParserInputPtr
DTDExternalEntityLoader(const char *pURL, const char *pID, xmlParserCtxtPtr ctxt)
{
xmlParserInputPtr ret;
/* lookup for the fileID depending on ID */
std::map<string, string>::iterator it = g_DTDMap.find(pURL);
if (it != g_DTDMap.end()) {
ret = xmlNewStringInputStream(ctxt, (const xmlChar *)(it->second.c_str()));
return(ret);
} else {
ret = DefaultLoaderProc(pURL, pID, ctxt);
return(ret);
}
}
void registerDTDEntityLoader(const string& sID, const string& sDTD)
{
g_DTDMap[sID] = sDTD;
if (!DefaultLoaderProc) {
DefaultLoaderProc = xmlGetExternalEntityLoader();
}
xmlSetExternalEntityLoader(DTDExternalEntityLoader);
}
XMLParser::XMLParser()
: m_SchemaParserCtxt(0),
m_Schema(0),
m_SchemaValidCtxt(0),
m_DTD(0),
m_DTDValidCtxt(0),
m_Doc(0)
{
xmlPedanticParserDefault(1);
xmlSetGenericErrorFunc(this, errorOutputFunc);
xmlDoValidityCheckingDefaultValue = 0;
}
XMLParser::~XMLParser()
{
if (m_Schema) {
xmlSchemaFree(m_Schema);
}
if (m_SchemaParserCtxt) {
xmlSchemaFreeParserCtxt(m_SchemaParserCtxt);
}
if (m_SchemaValidCtxt) {
xmlSchemaFreeValidCtxt(m_SchemaValidCtxt);
}
if (m_DTD) {
xmlFreeDtd(m_DTD);
}
if (m_DTDValidCtxt) {
xmlFreeValidCtxt(m_DTDValidCtxt);
}
if (m_Doc) {
xmlFreeDoc(m_Doc);
}
xmlSetGenericErrorFunc(0, 0);
}
void XMLParser::setSchema(const string& sSchema, const string& sSchemaName)
{
AVG_ASSERT(!m_SchemaParserCtxt);
AVG_ASSERT(!m_Schema);
AVG_ASSERT(!m_SchemaValidCtxt);
AVG_ASSERT(!m_DTD);
AVG_ASSERT(!m_DTDValidCtxt);
m_SchemaParserCtxt = xmlSchemaNewMemParserCtxt(sSchema.c_str(), sSchema.length());
checkError(!m_SchemaParserCtxt, sSchemaName);
m_Schema = xmlSchemaParse(m_SchemaParserCtxt);
checkError(!m_Schema, sSchemaName);
m_SchemaValidCtxt = xmlSchemaNewValidCtxt(m_Schema);
checkError(!m_SchemaValidCtxt, sSchemaName);
}
void XMLParser::setDTD(const std::string& sDTD, const std::string& sDTDName)
{
AVG_ASSERT(!m_SchemaParserCtxt);
AVG_ASSERT(!m_Schema);
AVG_ASSERT(!m_SchemaValidCtxt);
AVG_ASSERT(!m_DTD);
AVG_ASSERT(!m_DTDValidCtxt);
registerDTDEntityLoader("memory.dtd", sDTD.c_str());
string sDTDFName = "memory.dtd";
m_DTD = xmlParseDTD(NULL, (const xmlChar*) sDTDFName.c_str());
checkError(!m_DTD, sDTDName);
m_DTDValidCtxt = xmlNewValidCtxt();
checkError(!m_DTDValidCtxt, sDTDName);
m_DTDValidCtxt->error = xmlParserValidityError;
m_DTDValidCtxt->warning = xmlParserValidityWarning;
}
void XMLParser::parse(const string& sXML, const string& sXMLName)
{
if (m_Doc) {
xmlFreeDoc(m_Doc);
}
m_Doc = xmlParseMemory(sXML.c_str(), int(sXML.length()));
checkError(!m_Doc, sXMLName);
bool bOK = true;
if (m_SchemaValidCtxt) {
int err = xmlSchemaValidateDoc(m_SchemaValidCtxt, m_Doc);
AVG_ASSERT(err != -1);
bOK = (err == 0);
}
if (m_DTD) {
int err = xmlValidateDtd(m_DTDValidCtxt, m_Doc, m_DTD);
bOK = (err != 0);
}
if (!bOK) {
xmlFreeDoc(m_Doc);
m_Doc = 0;
checkError(true, sXMLName);
}
}
xmlDocPtr XMLParser::getDoc()
{
AVG_ASSERT(m_Doc);
return m_Doc;
}
xmlNodePtr XMLParser::getRootNode()
{
AVG_ASSERT(m_Doc);
return xmlDocGetRootElement(m_Doc);
}
void XMLParser::errorOutputFunc(void * ctx, const char * msg, ...)
{
va_list args;
va_start(args, msg);
((XMLParser*)ctx)->internalErrorHandler(msg, args);
va_end(args);
}
void XMLParser::internalErrorHandler(const char * msg, va_list args)
{
char psz[1024];
vsnprintf(psz, 1024, msg, args);
m_sError += psz;
}
void XMLParser::checkError(bool bError, const string& sXMLName)
{
if (bError) {
string sError = "Error parsing "+sXMLName+".\n";
sError += m_sError;
m_sError = "";
throw (Exception(AVG_ERR_XML_PARSE, sError));
}
}
void validateXml(const string& sXML, const string& sSchema, const string& sXMLName,
const string& sSchemaName)
{
XMLParser parser;
parser.setSchema(sSchema, sSchemaName);
parser.parse(sXML, sXMLName);
}
}
|
