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1 // Protocol Buffers - Google's data interchange format
2 // Copyright 2008 Google Inc.  All rights reserved.
3 // https://developers.google.com/protocol-buffers/
4 //
5 // Redistribution and use in source and binary forms, with or without
6 // modification, are permitted provided that the following conditions are
7 // met:
8 //
9 //     * Redistributions of source code must retain the above copyright
10 // notice, this list of conditions and the following disclaimer.
11 //     * Redistributions in binary form must reproduce the above
12 // copyright notice, this list of conditions and the following disclaimer
13 // in the documentation and/or other materials provided with the
14 // distribution.
15 //     * Neither the name of Google Inc. nor the names of its
16 // contributors may be used to endorse or promote products derived from
17 // this software without specific prior written permission.
18 //
19 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
20 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
21 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
23 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
25 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
29 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 
31 #include <google/protobuf/util/internal/json_objectwriter.h>
32 
33 #include <math.h>
34 
35 #include <google/protobuf/stubs/casts.h>
36 #include <google/protobuf/stubs/logging.h>
37 #include <google/protobuf/stubs/common.h>
38 #include <google/protobuf/util/internal/utility.h>
39 #include <google/protobuf/util/internal/json_escaping.h>
40 #include <google/protobuf/stubs/strutil.h>
41 #include <google/protobuf/stubs/mathlimits.h>
42 
43 namespace google {
44 namespace protobuf {
45 namespace util {
46 namespace converter {
47 
48 using strings::ArrayByteSource;
49 ;
50 
~JsonObjectWriter()51 JsonObjectWriter::~JsonObjectWriter() {
52   if (!element_->is_root()) {
53     GOOGLE_LOG(WARNING) << "JsonObjectWriter was not fully closed.";
54   }
55 }
56 
StartObject(StringPiece name)57 JsonObjectWriter* JsonObjectWriter::StartObject(StringPiece name) {
58   WritePrefix(name);
59   WriteChar('{');
60   Push();
61   return this;
62 }
63 
EndObject()64 JsonObjectWriter* JsonObjectWriter::EndObject() {
65   Pop();
66   WriteChar('}');
67   if (element()->is_root()) NewLine();
68   return this;
69 }
70 
StartList(StringPiece name)71 JsonObjectWriter* JsonObjectWriter::StartList(StringPiece name) {
72   WritePrefix(name);
73   WriteChar('[');
74   Push();
75   return this;
76 }
77 
EndList()78 JsonObjectWriter* JsonObjectWriter::EndList() {
79   Pop();
80   WriteChar(']');
81   if (element()->is_root()) NewLine();
82   return this;
83 }
84 
RenderBool(StringPiece name,bool value)85 JsonObjectWriter* JsonObjectWriter::RenderBool(StringPiece name, bool value) {
86   return RenderSimple(name, value ? "true" : "false");
87 }
88 
RenderInt32(StringPiece name,int32 value)89 JsonObjectWriter* JsonObjectWriter::RenderInt32(StringPiece name, int32 value) {
90   return RenderSimple(name, SimpleItoa(value));
91 }
92 
RenderUint32(StringPiece name,uint32 value)93 JsonObjectWriter* JsonObjectWriter::RenderUint32(StringPiece name,
94                                                  uint32 value) {
95   return RenderSimple(name, SimpleItoa(value));
96 }
97 
RenderInt64(StringPiece name,int64 value)98 JsonObjectWriter* JsonObjectWriter::RenderInt64(StringPiece name, int64 value) {
99   WritePrefix(name);
100   WriteChar('"');
101   stream_->WriteString(SimpleItoa(value));
102   WriteChar('"');
103   return this;
104 }
105 
RenderUint64(StringPiece name,uint64 value)106 JsonObjectWriter* JsonObjectWriter::RenderUint64(StringPiece name,
107                                                  uint64 value) {
108   WritePrefix(name);
109   WriteChar('"');
110   stream_->WriteString(SimpleItoa(value));
111   WriteChar('"');
112   return this;
113 }
114 
RenderDouble(StringPiece name,double value)115 JsonObjectWriter* JsonObjectWriter::RenderDouble(StringPiece name,
116                                                  double value) {
117   if (MathLimits<double>::IsFinite(value)) {
118     return RenderSimple(name, SimpleDtoa(value));
119   }
120 
121   // Render quoted with NaN/Infinity-aware DoubleAsString.
122   return RenderString(name, DoubleAsString(value));
123 }
124 
RenderFloat(StringPiece name,float value)125 JsonObjectWriter* JsonObjectWriter::RenderFloat(StringPiece name, float value) {
126   if (MathLimits<float>::IsFinite(value)) {
127     return RenderSimple(name, SimpleFtoa(value));
128   }
129 
130   // Render quoted with NaN/Infinity-aware FloatAsString.
131   return RenderString(name, FloatAsString(value));
132 }
133 
RenderString(StringPiece name,StringPiece value)134 JsonObjectWriter* JsonObjectWriter::RenderString(StringPiece name,
135                                                  StringPiece value) {
136   WritePrefix(name);
137   WriteChar('"');
138   ArrayByteSource source(value);
139   JsonEscaping::Escape(&source, &sink_);
140   WriteChar('"');
141   return this;
142 }
143 
RenderBytes(StringPiece name,StringPiece value)144 JsonObjectWriter* JsonObjectWriter::RenderBytes(StringPiece name,
145                                                 StringPiece value) {
146   WritePrefix(name);
147   string base64;
148 
149   if (use_websafe_base64_for_bytes_)
150     WebSafeBase64Escape(value.ToString(), &base64);
151   else
152     Base64Escape(value, &base64);
153 
154   WriteChar('"');
155   // TODO(wpoon): Consider a ByteSink solution that writes the base64 bytes
156   //              directly to the stream, rather than first putting them
157   //              into a string and then writing them to the stream.
158   stream_->WriteRaw(base64.data(), base64.size());
159   WriteChar('"');
160   return this;
161 }
162 
RenderNull(StringPiece name)163 JsonObjectWriter* JsonObjectWriter::RenderNull(StringPiece name) {
164   return RenderSimple(name, "null");
165 }
166 
WritePrefix(StringPiece name)167 void JsonObjectWriter::WritePrefix(StringPiece name) {
168   bool not_first = !element()->is_first();
169   if (not_first) WriteChar(',');
170   if (not_first || !element()->is_root()) NewLine();
171   if (!name.empty()) {
172     WriteChar('"');
173     ArrayByteSource source(name);
174     JsonEscaping::Escape(&source, &sink_);
175     stream_->WriteString("\":");
176     if (!indent_string_.empty()) WriteChar(' ');
177   }
178 }
179 
180 }  // namespace converter
181 }  // namespace util
182 }  // namespace protobuf
183 }  // namespace google
184