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Tencent / RapidJSON C++

RapidJSON是一个C++的JSON解析器及生成器

腾讯 c++ json
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项目最近一次提交:7 个月 前 d88be8ef1

文件列表 提交日期 作者 提交信息 提交编号
CMakeModules / 2016-06-10 10:15:45 4_miloyip miloyip Change googletest search path for cmake ce3ca58f
bin / 2017-03-03 09:48:41 No_avatar Erik Froseth Remove executable bit d6e9cf5d
doc / 2017-03-20 11:20:04 4_miloyip miloyip Update schema.zh-cn.md 430e8d4c
docker / 2016-03-02 01:45:05 4_miloyip miloyip Add debian docker file for development 680c1112
example / 2017-03-13 07:53:37 No_avatar John Stiles Remove all switch f0c108b5
include / Ajax_loader_tree
test / Ajax_loader_tree
thirdparty / 2016-06-08 09:36:03 No_avatar Zhang Ye Update reference to gtest thirdparty ... 47d73200
.gitattributes 2016-03-04 11:52:18 4_miloyip miloyip Normalize line endings but not JSON f... a6277748
.gitignore 2016-06-15 11:56:20 No_avatar Andy Deng gitignore: ignore Doxyfile.zh-cn dabbd2b0
.gitmodules 2016-06-08 09:36:03 No_avatar Zhang Ye Update reference to gtest thirdparty ... 47d73200
.travis.yml 2016-06-10 15:21:29 No_avatar Eli Fidler use included clang on travis d1697f74
CHANGELOG.md 2016-08-25 14:35:17 4_miloyip miloyip Version 1.1.0 17254e09
CMakeLists.txt 2017-03-14 10:27:36 No_avatar Clemens Arth update to create config file which is... b91c515a
RapidJSON.pc.in 2015-02-24 22:35:12 No_avatar Christian Hitz RapidJSON.pc.in: include dir not set 46554603
RapidJSONConfig.cmake.in 2017-03-14 10:27:36 No_avatar Clemens Arth update to create config file which is... b91c515a
RapidJSONConfigVersion.cmake.in 2014-11-11 23:26:59 No_avatar Andriy Senkovych Add initial CMake support 8ae1c971
appveyor.yml 2016-08-25 14:35:17 4_miloyip miloyip Version 1.1.0 17254e09
include_dirs.js 2016-05-09 16:45:18 No_avatar Andrea Colaci include folder added f8df6377
library.json 2016-11-28 12:53:24 No_avatar Ivan Kravets Update version to 1.1.0 ba34c945

README.md

A fast JSON parser/generator for C++ with both SAX/DOM style API

Tencent is pleased to support the open source community by making RapidJSON available.

Copyright (C) 2015 THL A29 Limited, a Tencent company, and Milo Yip. All rights reserved.

Build status

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Introduction

RapidJSON is a JSON parser and generator for C++. It was inspired by RapidXml.

  • RapidJSON is small but complete. It supports both SAX and DOM style API. The SAX parser is only a half thousand lines of code.

  • RapidJSON is fast. Its performance can be comparable to strlen(). It also optionally supports SSE2/SSE4.2 for acceleration.

  • RapidJSON is self-contained and header-only. It does not depend on external libraries such as BOOST. It even does not depend on STL.

  • RapidJSON is memory-friendly. Each JSON value occupies exactly 16 bytes for most 32/64-bit machines (excluding text string). By default it uses a fast memory allocator, and the parser allocates memory compactly during parsing.

  • RapidJSON is Unicode-friendly. It supports UTF-8, UTF-16, UTF-32 (LE & BE), and their detection, validation and transcoding internally. For example, you can read a UTF-8 file and let RapidJSON transcode the JSON strings into UTF-16 in the DOM. It also supports surrogates and "\u0000" (null character).

More features can be read here.

JSON(JavaScript Object Notation) is a light-weight data exchange format. RapidJSON should be in fully compliance with RFC7159/ECMA-404, with optional support of relaxed syntax. More information about JSON can be obtained at

Highlights in v1.1 (2016-8-25)

For other changes please refer to change log.

Compatibility

RapidJSON is cross-platform. Some platform/compiler combinations which have been tested are shown as follows.

  • Visual C++ 2008/2010/2013 on Windows (32/64-bit)
  • GNU C++ 3.8.x on Cygwin
  • Clang 3.4 on Mac OS X (32/64-bit) and iOS
  • Clang 3.4 on Android NDK

Users can build and run the unit tests on their platform/compiler.

Installation

RapidJSON is a header-only C++ library. Just copy the include/rapidjson folder to system or project's include path.

RapidJSON uses following software as its dependencies:

  • CMake as a general build tool
  • (optional)Doxygen to build documentation
  • (optional)googletest for unit and performance testing

To generate user documentation and run tests please proceed with the steps below:

  1. Execute git submodule update --init to get the files of thirdparty submodules (google test).
  2. Create directory called build in rapidjson source directory.
  3. Change to build directory and run cmake .. command to configure your build. Windows users can do the same with cmake-gui application.
  4. On Windows, build the solution found in the build directory. On Linux, run make from the build directory.

On successfull build you will find compiled test and example binaries in bin directory. The generated documentation will be available in doc/html directory of the build tree. To run tests after finished build please run make test or ctest from your build tree. You can get detailed output using ctest -V command.

It is possible to install library system-wide by running make install command from the build tree with administrative privileges. This will install all files according to system preferences. Once RapidJSON is installed, it is possible to use it from other CMake projects by adding find_package(RapidJSON) line to your CMakeLists.txt.

Usage at a glance

This simple example parses a JSON string into a document (DOM), make a simple modification of the DOM, and finally stringify the DOM to a JSON string.

// rapidjson/example/simpledom/simpledom.cpp`
#include "rapidjson/document.h"
#include "rapidjson/writer.h"
#include "rapidjson/stringbuffer.h"
#include <iostream>

using namespace rapidjson;

int main() {
    // 1. Parse a JSON string into DOM.
    const char* json = "{\"project\":\"rapidjson\",\"stars\":10}";
    Document d;
    d.Parse(json);

    // 2. Modify it by DOM.
    Value& s = d["stars"];
    s.SetInt(s.GetInt() + 1);

    // 3. Stringify the DOM
    StringBuffer buffer;
    Writer<StringBuffer> writer(buffer);
    d.Accept(writer);

    // Output {"project":"rapidjson","stars":11}
    std::cout << buffer.GetString() << std::endl;
    return 0;
}

Note that this example did not handle potential errors.

The following diagram shows the process.

simpledom

More examples are available:

  • DOM API

  • SAX API

    • simplereader: Dumps all SAX events while parsing a JSON by Reader.
    • condense: A command line tool to rewrite a JSON, with all whitespaces removed.
    • pretty: A command line tool to rewrite a JSON with indents and newlines by PrettyWriter.
    • capitalize: A command line tool to capitalize strings in JSON.
    • messagereader: Parse a JSON message with SAX API.
    • serialize: Serialize a C++ object into JSON with SAX API.
    • jsonx: Implements a JsonxWriter which stringify SAX events into JSONx (a kind of XML) format. The example is a command line tool which converts input JSON into JSONx format.
  • Schema

    • schemavalidator : A command line tool to validate a JSON with a JSON schema.
  • Advanced

    • prettyauto: A modified version of pretty to automatically handle JSON with any UTF encodings.
    • parsebyparts: Implements an AsyncDocumentParser which can parse JSON in parts, using C++11 thread.
    • filterkey: A command line tool to remove all values with user-specified key.
    • filterkeydom: Same tool as above, but it demonstrates how to use a generator to populate a Document.