parson下載 - parson源代碼下載

parson

C#源碼

1.0.0

下載

關於

帕森是用C編寫的輕量級JSON庫。

特徵

輕量級（只有2個文件）
簡單的API
用點表示法（類似於大多數OO語言中的C結構或對象，例如“ Objecta.ObjectB.Value”））來解決JSON值（類似
C89兼容
測試套件

安裝

跑步：

 git clone https://github.com/kgabis/parson.git

並將Parson.H和Parson.C複製到您的源代碼樹。

運行make test以進行編譯和運行測試。

例子

解析JSON

這是一個函數，它從GitHub存儲庫中打印基本提交信息（日期，SHA和作者）。

 void print_commits_info ( const char * username , const char * repo ) {
    JSON_Value * root_value ;
    JSON_Array * commits ;
    JSON_Object * commit ;
    size_t i ;
    
    char curl_command [ 512 ];
    char cleanup_command [ 256 ];
    char output_filename [] = "commits.json" ;
    
    /* it ain't pretty, but it's not a libcurl tutorial */
    sprintf ( curl_command , 
        "curl -s "https://api.github.com/repos/%s/%s/commits" > %s" ,
        username , repo , output_filename );
    sprintf ( cleanup_command , "rm -f %s" , output_filename );
    system ( curl_command );
    
    /* parsing json and validating output */
    root_value = json_parse_file ( output_filename );
    if ( json_value_get_type ( root_value ) != JSONArray ) {
        system ( cleanup_command );
        return ;
    }
    
    /* getting array from root value and printing commit info */
    commits = json_value_get_array ( root_value );
    printf ( "%-10.10s %-10.10s %sn" , "Date" , "SHA" , "Author" );
    for ( i = 0 ; i < json_array_get_count ( commits ); i ++ ) {
        commit = json_array_get_object ( commits , i );
        printf ( "%.10s %.10s %sn" ,
               json_object_dotget_string ( commit , "commit.author.date" ),
               json_object_get_string ( commit , "sha" ),
               json_object_dotget_string ( commit , "commit.author.name" ));
    }
    
    /* cleanup code */
    json_value_free ( root_value );
    system ( cleanup_command );
}

調用print_commits_info("torvalds", "linux");印刷：

 Date       SHA        Author
2012-10-15 dd8e8c4a2c David Rientjes
2012-10-15 3ce9e53e78 Michal Marek
2012-10-14 29bb4cc5e0 Randy Dunlap
2012-10-15 325adeb55e Ralf Baechle
2012-10-14 68687c842c Russell King
2012-10-14 ddffeb8c4d Linus Torvalds
...

持久性

在此示例中，我使用Parson將用戶信息保存到文件，然後加載並稍後驗證。

 void persistence_example ( void ) {
    JSON_Value * schema = json_parse_string ( "{"name":""}" );
    JSON_Value * user_data = json_parse_file ( "user_data.json" );
    char buf [ 256 ];
    const char * name = NULL ;
    if ( user_data == NULL || json_validate ( schema , user_data ) != JSONSuccess ) {
        puts ( "Enter your name:" );
        scanf ( "%s" , buf );
        user_data = json_value_init_object ();
        json_object_set_string ( json_object ( user_data ), "name" , buf );
        json_serialize_to_file ( user_data , "user_data.json" );
    }
    name = json_object_get_string ( json_object ( user_data ), "name" );
    printf ( "Hello, %s." , name );
    json_value_free ( schema );
    json_value_free ( user_data );
    return ;
}

序列化

由於點表示法，創建JSON值非常簡單。對象層次結構是在解決特定字段時自動創建的。在下面的示例中，我創建一個簡單的JSON值，其中包含有關人的基本信息。

 void serialization_example ( void ) {
    JSON_Value * root_value = json_value_init_object ();
    JSON_Object * root_object = json_value_get_object ( root_value );
    char * serialized_string = NULL ;
    json_object_set_string ( root_object , "name" , "John Smith" );
    json_object_set_number ( root_object , "age" , 25 );
    json_object_dotset_string ( root_object , "address.city" , "Cupertino" );
    json_object_dotset_value ( root_object , "contact.emails" , json_parse_string ( "["[email protected]","[email protected]"]" ));
    serialized_string = json_serialize_to_string_pretty ( root_value );
    puts ( serialized_string );
    json_free_serialized_string ( serialized_string );
    json_value_free ( root_value );
}

輸出：

 {
    "name": "John Smith",
    "age": 25,
    "address": {
        "city": "Cupertino"
    },
    "contact": {
        "emails": [
            "[email protected]",
            "[email protected]"
        ]
    }
}