JSON

Hereda: Resource < RefCounted < Object

Clase auxiliar para crear y analizar datos JSON.

Descripción

The JSON class enables all data types to be converted to and from a JSON string. This is useful for serializing data, e.g. to save to a file or send over the network.

stringify() is used to convert any data type into a JSON string.

parse() is used to convert any existing JSON data into a Variant that can be used within Godot. If successfully parsed, use data to retrieve the Variant, and use @GlobalScope.typeof() to check if the Variant's type is what you expect. JSON Objects are converted into a Dictionary, but JSON data can be used to store Arrays, numbers, Strings and even just a boolean.

var data_to_send = ["a", "b", "c"]
var json_string = JSON.stringify(data_to_send)
# Save data
# ...
# Retrieve data
var json = JSON.new()
var error = json.parse(json_string)
if error == OK:
    var data_received = json.data
    if typeof(data_received) == TYPE_ARRAY:
        print(data_received) # Prints the array.
    else:
        print("Unexpected data")
else:
    print("JSON Parse Error: ", json.get_error_message(), " in ", json_string, " at line ", json.get_error_line())

Alternatively, you can parse strings using the static parse_string() method, but it doesn't handle errors.

var data = JSON.parse_string(json_string) # Returns null if parsing failed.

Note: Both parse methods do not fully comply with the JSON specification:

• Trailing commas in arrays or objects are ignored, instead of causing a parser error.

• New line and tab characters are accepted in string literals, and are treated like their corresponding escape sequences \n and \t.

• Numbers are parsed using String.to_float() which is generally more lax than the JSON specification.

• Certain errors, such as invalid Unicode sequences, do not cause a parser error. Instead, the string is cleaned up and an error is logged to the console.

Propiedades

Variant

data

null

Métodos

Variant	from_native(variant: Variant, full_objects: bool = false) static
int	get_error_line() const
String	get_error_message() const
String	get_parsed_text() const
Error	parse(json_text: String, keep_text: bool = false)
Variant	parse_string(json_string: String) static
String	stringify(data: Variant, indent: String = "", sort_keys: bool = true, full_precision: bool = false) static
Variant	to_native(json: Variant, allow_objects: bool = false) static

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Descripciones de Propiedades

Variant data = null 🔗

• void set_data(value: Variant)

• Variant get_data()

Contiene los datos JSON analizados en formato Variant.

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Descripciones de Métodos

Variant from_native(variant: Variant, full_objects: bool = false) static 🔗

Converts a native engine type to a JSON-compliant value.

By default, objects are ignored for security reasons, unless full_objects is true.

You can convert a native value to a JSON string like this:

func encode_data(value, full_objects = false):
    return JSON.stringify(JSON.from_native(value, full_objects))

---

int get_error_line() const 🔗

Devuelve 0 si la última llamada a parse() fue exitosa, o el número de línea donde falló el análisis.

---

String get_error_message() const 🔗

Devuelve una string vacía si la última llamada a parse() fue exitosa, o el mensaje de error si falló.

---

String get_parsed_text() const 🔗

Devuelve el texto analizado por parse() (requiere pasar keep_text a parse()).

---

Error parse(json_text: String, keep_text: bool = false) 🔗

Attempts to parse the json_text provided.

Returns an Error. If the parse was successful, it returns @GlobalScope.OK and the result can be retrieved using data. If unsuccessful, use get_error_line() and get_error_message() to identify the source of the failure.

Non-static variant of parse_string(), if you want custom error handling.

The optional keep_text argument instructs the parser to keep a copy of the original text. This text can be obtained later by using the get_parsed_text() function and is used when saving the resource (instead of generating new text from data).

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Variant parse_string(json_string: String) static 🔗

Intenta analizar la json_string proporcionada y devuelve los datos analizados. Devuelve null si el análisis falla.

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String stringify(data: Variant, indent: String = "", sort_keys: bool = true, full_precision: bool = false) static 🔗

Converts a Variant var to JSON text and returns the result. Useful for serializing data to store or send over the network.

Note: The JSON specification does not define integer or float types, but only a number type. Therefore, converting a Variant to JSON text will convert all numerical values to float types.

Note: If full_precision is true, when stringifying floats, the unreliable digits are stringified in addition to the reliable digits to guarantee exact decoding.

The indent parameter controls if and how something is indented; its contents will be used where there should be an indent in the output. Even spaces like "   " will work. \t and \n can also be used for a tab indent, or to make a newline for each indent respectively.

Example output:

## JSON.stringify(my_dictionary)
{"name":"my_dictionary","version":"1.0.0","entities":[{"name":"entity_0","value":"value_0"},{"name":"entity_1","value":"value_1"}]}

## JSON.stringify(my_dictionary, "\t")
{
    "name": "my_dictionary",
    "version": "1.0.0",
    "entities": [
        {
            "name": "entity_0",
            "value": "value_0"
        },
        {
            "name": "entity_1",
            "value": "value_1"
        }
    ]
}

## JSON.stringify(my_dictionary, "...")
{
..."name": "my_dictionary",
..."version": "1.0.0",
..."entities": [
......{
........."name": "entity_0",
........."value": "value_0"
......},
......{
........."name": "entity_1",
........."value": "value_1"
......}
...]
}

---

Variant to_native(json: Variant, allow_objects: bool = false) static 🔗

Convierte un valor compatible con JSON que se creó con from_native() de nuevo a los tipos de motor nativos.

Por defecto, los objetos se ignoran por razones de seguridad, a menos que allow_objects sea true.

Puedes convertir un string JSON de nuevo a un valor nativo así:

func decode_data(string, allow_objects = false):
    return JSON.to_native(JSON.parse_string(string), allow_objects)