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 <cmath>
34 #include <limits>
35
36 #include <google/protobuf/stubs/casts.h>
37 #include <google/protobuf/stubs/logging.h>
38 #include <google/protobuf/stubs/common.h>
39 #include <google/protobuf/util/internal/utility.h>
40 #include <google/protobuf/util/internal/json_escaping.h>
41 #include <google/protobuf/stubs/strutil.h>
42
43 namespace google {
44 namespace protobuf {
45 namespace util {
46 namespace converter {
47
48
~JsonObjectWriter()49 JsonObjectWriter::~JsonObjectWriter() {
50 if (element_ && !element_->is_root()) {
51 GOOGLE_LOG(WARNING) << "JsonObjectWriter was not fully closed.";
52 }
53 }
54
StartObject(StringPiece name)55 JsonObjectWriter* JsonObjectWriter::StartObject(StringPiece name) {
56 WritePrefix(name);
57 WriteChar('{');
58 PushObject();
59 return this;
60 }
61
EndObject()62 JsonObjectWriter* JsonObjectWriter::EndObject() {
63 Pop();
64 WriteChar('}');
65 if (element() && element()->is_root()) NewLine();
66 return this;
67 }
68
StartList(StringPiece name)69 JsonObjectWriter* JsonObjectWriter::StartList(StringPiece name) {
70 WritePrefix(name);
71 WriteChar('[');
72 PushArray();
73 return this;
74 }
75
EndList()76 JsonObjectWriter* JsonObjectWriter::EndList() {
77 Pop();
78 WriteChar(']');
79 if (element()->is_root()) NewLine();
80 return this;
81 }
82
RenderBool(StringPiece name,bool value)83 JsonObjectWriter* JsonObjectWriter::RenderBool(StringPiece name,
84 bool value) {
85 return RenderSimple(name, value ? "true" : "false");
86 }
87
RenderInt32(StringPiece name,int32 value)88 JsonObjectWriter* JsonObjectWriter::RenderInt32(StringPiece name,
89 int32 value) {
90 return RenderSimple(name, StrCat(value));
91 }
92
RenderUint32(StringPiece name,uint32 value)93 JsonObjectWriter* JsonObjectWriter::RenderUint32(StringPiece name,
94 uint32 value) {
95 return RenderSimple(name, StrCat(value));
96 }
97
RenderInt64(StringPiece name,int64 value)98 JsonObjectWriter* JsonObjectWriter::RenderInt64(StringPiece name,
99 int64 value) {
100 WritePrefix(name);
101 WriteChar('"');
102 WriteRawString(StrCat(value));
103 WriteChar('"');
104 return this;
105 }
106
RenderUint64(StringPiece name,uint64 value)107 JsonObjectWriter* JsonObjectWriter::RenderUint64(StringPiece name,
108 uint64 value) {
109 WritePrefix(name);
110 WriteChar('"');
111 WriteRawString(StrCat(value));
112 WriteChar('"');
113 return this;
114 }
115
RenderDouble(StringPiece name,double value)116 JsonObjectWriter* JsonObjectWriter::RenderDouble(StringPiece name,
117 double value) {
118 if (std::isfinite(value)) {
119 return RenderSimple(name, SimpleDtoa(value));
120 }
121
122 // Render quoted with NaN/Infinity-aware DoubleAsString.
123 return RenderString(name, DoubleAsString(value));
124 }
125
RenderFloat(StringPiece name,float value)126 JsonObjectWriter* JsonObjectWriter::RenderFloat(StringPiece name,
127 float value) {
128 if (std::isfinite(value)) {
129 return RenderSimple(name, SimpleFtoa(value));
130 }
131
132 // Render quoted with NaN/Infinity-aware FloatAsString.
133 return RenderString(name, FloatAsString(value));
134 }
135
RenderString(StringPiece name,StringPiece value)136 JsonObjectWriter* JsonObjectWriter::RenderString(StringPiece name,
137 StringPiece value) {
138 WritePrefix(name);
139 WriteChar('"');
140 JsonEscaping::Escape(value, &sink_);
141 WriteChar('"');
142 return this;
143 }
144
RenderBytes(StringPiece name,StringPiece value)145 JsonObjectWriter* JsonObjectWriter::RenderBytes(StringPiece name,
146 StringPiece value) {
147 WritePrefix(name);
148 std::string base64;
149
150 if (use_websafe_base64_for_bytes_)
151 WebSafeBase64EscapeWithPadding(value.ToString(), &base64);
152 else
153 Base64Escape(value, &base64);
154
155 WriteChar('"');
156 // TODO(wpoon): Consider a ByteSink solution that writes the base64 bytes
157 // directly to the stream, rather than first putting them
158 // into a string and then writing them to the stream.
159 stream_->WriteRaw(base64.data(), base64.size());
160 WriteChar('"');
161 return this;
162 }
163
RenderNull(StringPiece name)164 JsonObjectWriter* JsonObjectWriter::RenderNull(StringPiece name) {
165 return RenderSimple(name, "null");
166 }
167
RenderNullAsEmpty(StringPiece name)168 JsonObjectWriter* JsonObjectWriter::RenderNullAsEmpty(StringPiece name) {
169 return RenderSimple(name, "");
170 }
171
WritePrefix(StringPiece name)172 void JsonObjectWriter::WritePrefix(StringPiece name) {
173 bool not_first = !element()->is_first();
174 if (not_first) WriteChar(',');
175 if (not_first || !element()->is_root()) NewLine();
176 if (!name.empty() || element()->is_json_object()) {
177 WriteChar('"');
178 if (!name.empty()) {
179 JsonEscaping::Escape(name, &sink_);
180 }
181 WriteRawString("\":");
182 if (!indent_string_.empty()) WriteChar(' ');
183 }
184 }
185
186 } // namespace converter
187 } // namespace util
188 } // namespace protobuf
189 } // namespace google
190