louloulibs/xmpp/xmpp_stanza.cpp


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
226
227
228
229

#include <xmpp/xmpp_stanza.hpp>

#include <utils/encoding.hpp>
#include <utils/split.hpp>

#include <stdexcept>
#include <iostream>
#include <sstream>

#include <string.h>

std::string xml_escape(const std::string& data)
{
  std::string res;
  res.reserve(data.size());
  for (size_t pos = 0; pos != data.size(); ++pos)
    {
      switch(data[pos])
        {
        case '&':
          res += "&amp;";
          break;
        case '<':
          res += "&lt;";
          break;
        case '>':
          res += "&gt;";
          break;
        case '\"':
          res += "&quot;";
          break;
        case '\'':
          res += "&apos;";
          break;
        default:
          res += data[pos];
          break;
        }
    }
  return res;
}

std::string sanitize(const std::string& data, const std::string& encoding)
{
  if (utils::is_valid_utf8(data.data()))
    return xml_escape(utils::remove_invalid_xml_chars(data));
  else
    return xml_escape(utils::remove_invalid_xml_chars(utils::convert_to_utf8(data, encoding.data())));
}

XmlNode::XmlNode(const std::string& name, XmlNode* parent):
  parent(parent)
{
  // split the namespace and the name
  auto n = name.rfind(":");
  if (n == std::string::npos)
    this->name = name;
  else
    {
      this->name = name.substr(n+1);
      this->attributes["xmlns"] = name.substr(0, n);
    }
}

XmlNode::XmlNode(const std::string& name):
  XmlNode(name, nullptr)
{
}

void XmlNode::delete_all_children()
{
  this->children.clear();
}

void XmlNode::set_attribute(const std::string& name, const std::string& value)
{
  this->attributes[name] = value;
}

void XmlNode::set_tail(const std::string& data)
{
  this->tail = data;
}

void XmlNode::add_to_tail(const std::string& data)
{
  this->tail += data;
}

void XmlNode::set_inner(const std::string& data)
{
  this->inner = data;
}

void XmlNode::add_to_inner(const std::string& data)
{
  this->inner += data;
}

std::string XmlNode::get_inner() const
{
  return this->inner;
}

std::string XmlNode::get_tail() const
{
  return this->tail;
}

const XmlNode* XmlNode::get_child(const std::string& name, const std::string& xmlns) const
{
  for (const auto& child: this->children)
    {
      if (child->name == name && child->get_tag("xmlns") == xmlns)
        return child.get();
    }
  return nullptr;
}

std::vector<const XmlNode*> XmlNode::get_children(const std::string& name, const std::string& xmlns) const
{
  std::vector<const XmlNode*> res;
  for (const auto& child: this->children)
    {
      if (child->name == name && child->get_tag("xmlns") == xmlns)
        res.push_back(child.get());
    }
  return res;
}

XmlNode* XmlNode::add_child(std::unique_ptr<XmlNode> child)
{
  child->parent = this;
  auto ret = child.get();
  this->children.push_back(std::move(child));
  return ret;
}

XmlNode* XmlNode::add_child(XmlNode&& child)
{
  auto new_node = std::make_unique<XmlNode>(std::move(child));
  return this->add_child(std::move(new_node));
}

XmlNode* XmlNode::add_child(const XmlNode& child)
{
  auto new_node = std::make_unique<XmlNode>(child);
  return this->add_child(std::move(new_node));
}

XmlNode* XmlNode::get_last_child() const
{
  return this->children.back().get();
}

XmlNode* XmlNode::get_parent() const
{
  return this->parent;
}

void XmlNode::set_name(const std::string& name)
{
  this->name = name;
}

void XmlNode::set_name(std::string&& name)
{
  this->name = std::move(name);
}

const std::string XmlNode::get_name() const
{
  return this->name;
}

std::string XmlNode::to_string() const
{
  std::ostringstream res;
  res << "<" << this->name;
  for (const auto& it: this->attributes)
    res << " " << it.first << "='" << sanitize(it.second) + "'";
  if (!this->has_children() && this->inner.empty())
    res << "/>";
  else
    {
      res << ">" + sanitize(this->inner);
      for (const auto& child: this->children)
        res << child->to_string();
      res << "</" << this->get_name() << ">";
    }
  res << sanitize(this->tail);
  return res.str();
}

bool XmlNode::has_children() const
{
  return !this->children.empty();
}

const std::string& XmlNode::get_tag(const std::string& name) const
{
  try
    {
      const auto& value = this->attributes.at(name);
      return value;
    }
  catch (const std::out_of_range& e)
    {
      static const std::string def{};
      return def;
    }
}

bool XmlNode::del_tag(const std::string& name)
{
  if (this->attributes.erase(name) != 0)
    return true;
  return false;
}

std::string& XmlNode::operator[](const std::string& name)
{
  return this->attributes[name];
}

std::ostream& operator<<(std::ostream& os, const XmlNode& node)
{
  return os << node.to_string();
}