godot-docs/classes/class_httprequest.rst

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.. Generated automatically by doc/tools/makerst.py in Godot's source tree.
.. DO NOT EDIT THIS FILE, but the HTTPRequest.xml source instead.
.. The source is found in doc/classes or modules/<name>/doc_classes.

.. _class_HTTPRequest:

HTTPRequest
===========

**Inherits:** :ref:`Node<class_Node>` **<** :ref:`Object<class_Object>`

A node with the ability to send HTTP(S) requests.

Description
-----------

A node with the ability to send HTTP requests. Uses :ref:`HTTPClient<class_HTTPClient>` internally.

Can be used to make HTTP requests, i.e. download or upload files or web content via HTTP.

**Example of contacting a REST API and printing one of its returned fields:**

::

    func _ready():
        # Create an HTTP request node and connect its completion signal.
        var http_request = HTTPRequest.new()
        add_child(http_request)
        http_request.connect("request_completed", self, "_http_request_completed")
    
        # Perform a GET request. The URL below returns JSON as of writing.
        var error = http_request.request("https://httpbin.org/get")
        if error != OK:
            push_error("An error occurred in the HTTP request.")
    
        # Perform a POST request. The URL below returns JSON as of writing.
        # Note: Don't make simultaneous requests using a single HTTPRequest node.
        # The snippet below is provided for reference only.
        var body = {"name": "Godette"}
        error = http_request.request("https://httpbin.org/post", [], true, HTTPClient.METHOD_POST, body)
        if error != OK:
            push_error("An error occurred in the HTTP request.")
    
    
    # Called when the HTTP request is completed.
    func _http_request_completed(result, response_code, headers, body):
        var response = parse_json(body.get_string_from_utf8())
    
        # Will print the user agent string used by the HTTPRequest node (as recognized by httpbin.org).
        print(response.headers["User-Agent"])

**Example of loading and displaying an image using HTTPRequest:**

::

    func _ready():
        # Create an HTTP request node and connect its completion signal.
        var http_request = HTTPRequest.new()
        add_child(http_request)
        http_request.connect("request_completed", self, "_http_request_completed")
    
        # Perform the HTTP request. The URL below returns a PNG image as of writing.
        var error = http_request.request("https://via.placeholder.com/512")
        if error != OK:
            push_error("An error occurred in the HTTP request.")
    
    
    # Called when the HTTP request is completed.
    func _http_request_completed(result, response_code, headers, body):
        var image = Image.new()
        var error = image.load_png_from_buffer(body)
        if error != OK:
            push_error("Couldn't load the image.")
    
        var texture = ImageTexture.new()
        texture.create_from_image(image)
    
        # Display the image in a TextureRect node.
        var texture_rect = TextureRect.new()
        add_child(texture_rect)
        texture_rect.texture = texture

**Note:** When performing HTTP requests from a project exported to HTML5, keep in mind the remote server may not allow requests from foreign origins due to `CORS <https://developer.mozilla.org/en-US/docs/Web/HTTP/CORS>`_. If you host the server in question, you should modify its backend to allow requests from foreign origins by adding the ``Access-Control-Allow-Origin: *`` HTTP header.

**Note:** SSL/TLS support is currently limited to TLS 1.0, TLS 1.1, and TLS 1.2. Attempting to connect to a TLS 1.3-only server will return an error.

Tutorials
---------

- :doc:`../tutorials/networking/http_request_class`

- :doc:`../tutorials/networking/ssl_certificates`

Properties
----------

+-----------------------------+----------------------------------------------------------------------------+-----------+
| :ref:`int<class_int>`       | :ref:`body_size_limit<class_HTTPRequest_property_body_size_limit>`         | ``-1``    |
+-----------------------------+----------------------------------------------------------------------------+-----------+
| :ref:`int<class_int>`       | :ref:`download_chunk_size<class_HTTPRequest_property_download_chunk_size>` | ``65536`` |
+-----------------------------+----------------------------------------------------------------------------+-----------+
| :ref:`String<class_String>` | :ref:`download_file<class_HTTPRequest_property_download_file>`             | ``""``    |
+-----------------------------+----------------------------------------------------------------------------+-----------+
| :ref:`int<class_int>`       | :ref:`max_redirects<class_HTTPRequest_property_max_redirects>`             | ``8``     |
+-----------------------------+----------------------------------------------------------------------------+-----------+
| :ref:`int<class_int>`       | :ref:`timeout<class_HTTPRequest_property_timeout>`                         | ``0``     |
+-----------------------------+----------------------------------------------------------------------------+-----------+
| :ref:`bool<class_bool>`     | :ref:`use_threads<class_HTTPRequest_property_use_threads>`                 | ``false`` |
+-----------------------------+----------------------------------------------------------------------------+-----------+

Methods
-------

+---------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| void                                  | :ref:`cancel_request<class_HTTPRequest_method_cancel_request>` **(** **)**                                                                                                                                                                                                                                                    |
+---------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`int<class_int>`                 | :ref:`get_body_size<class_HTTPRequest_method_get_body_size>` **(** **)** |const|                                                                                                                                                                                                                                              |
+---------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`int<class_int>`                 | :ref:`get_downloaded_bytes<class_HTTPRequest_method_get_downloaded_bytes>` **(** **)** |const|                                                                                                                                                                                                                                |
+---------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`Status<enum_HTTPClient_Status>` | :ref:`get_http_client_status<class_HTTPRequest_method_get_http_client_status>` **(** **)** |const|                                                                                                                                                                                                                            |
+---------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`Error<enum_@GlobalScope_Error>` | :ref:`request<class_HTTPRequest_method_request>` **(** :ref:`String<class_String>` url, :ref:`PoolStringArray<class_PoolStringArray>` custom_headers=PoolStringArray(  ), :ref:`bool<class_bool>` ssl_validate_domain=true, :ref:`Method<enum_HTTPClient_Method>` method=0, :ref:`String<class_String>` request_data="" **)** |
+---------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+

Signals
-------

.. _class_HTTPRequest_signal_request_completed:

- **request_completed** **(** :ref:`int<class_int>` result, :ref:`int<class_int>` response_code, :ref:`PoolStringArray<class_PoolStringArray>` headers, :ref:`PoolByteArray<class_PoolByteArray>` body **)**

Emitted when a request is completed.

Enumerations
------------

.. _enum_HTTPRequest_Result:

.. _class_HTTPRequest_constant_RESULT_SUCCESS:

.. _class_HTTPRequest_constant_RESULT_CHUNKED_BODY_SIZE_MISMATCH:

.. _class_HTTPRequest_constant_RESULT_CANT_CONNECT:

.. _class_HTTPRequest_constant_RESULT_CANT_RESOLVE:

.. _class_HTTPRequest_constant_RESULT_CONNECTION_ERROR:

.. _class_HTTPRequest_constant_RESULT_SSL_HANDSHAKE_ERROR:

.. _class_HTTPRequest_constant_RESULT_NO_RESPONSE:

.. _class_HTTPRequest_constant_RESULT_BODY_SIZE_LIMIT_EXCEEDED:

.. _class_HTTPRequest_constant_RESULT_REQUEST_FAILED:

.. _class_HTTPRequest_constant_RESULT_DOWNLOAD_FILE_CANT_OPEN:

.. _class_HTTPRequest_constant_RESULT_DOWNLOAD_FILE_WRITE_ERROR:

.. _class_HTTPRequest_constant_RESULT_REDIRECT_LIMIT_REACHED:

.. _class_HTTPRequest_constant_RESULT_TIMEOUT:

enum **Result**:

- **RESULT_SUCCESS** = **0** --- Request successful.

- **RESULT_CHUNKED_BODY_SIZE_MISMATCH** = **1**

- **RESULT_CANT_CONNECT** = **2** --- Request failed while connecting.

- **RESULT_CANT_RESOLVE** = **3** --- Request failed while resolving.

- **RESULT_CONNECTION_ERROR** = **4** --- Request failed due to connection (read/write) error.

- **RESULT_SSL_HANDSHAKE_ERROR** = **5** --- Request failed on SSL handshake.

- **RESULT_NO_RESPONSE** = **6** --- Request does not have a response (yet).

- **RESULT_BODY_SIZE_LIMIT_EXCEEDED** = **7** --- Request exceeded its maximum size limit, see :ref:`body_size_limit<class_HTTPRequest_property_body_size_limit>`.

- **RESULT_REQUEST_FAILED** = **8** --- Request failed (currently unused).

- **RESULT_DOWNLOAD_FILE_CANT_OPEN** = **9** --- HTTPRequest couldn't open the download file.

- **RESULT_DOWNLOAD_FILE_WRITE_ERROR** = **10** --- HTTPRequest couldn't write to the download file.

- **RESULT_REDIRECT_LIMIT_REACHED** = **11** --- Request reached its maximum redirect limit, see :ref:`max_redirects<class_HTTPRequest_property_max_redirects>`.

- **RESULT_TIMEOUT** = **12**

Property Descriptions
---------------------

.. _class_HTTPRequest_property_body_size_limit:

- :ref:`int<class_int>` **body_size_limit**

+-----------+----------------------------+
| *Default* | ``-1``                     |
+-----------+----------------------------+
| *Setter*  | set_body_size_limit(value) |
+-----------+----------------------------+
| *Getter*  | get_body_size_limit()      |
+-----------+----------------------------+

Maximum allowed size for response bodies.

----

.. _class_HTTPRequest_property_download_chunk_size:

- :ref:`int<class_int>` **download_chunk_size**

+-----------+--------------------------------+
| *Default* | ``65536``                      |
+-----------+--------------------------------+
| *Setter*  | set_download_chunk_size(value) |
+-----------+--------------------------------+
| *Getter*  | get_download_chunk_size()      |
+-----------+--------------------------------+

The size of the buffer used and maximum bytes to read per iteration. See :ref:`HTTPClient.read_chunk_size<class_HTTPClient_property_read_chunk_size>`.

Set this to a lower value (e.g. 4096 for 4 KiB) when downloading small files to decrease memory usage at the cost of download speeds.

----

.. _class_HTTPRequest_property_download_file:

- :ref:`String<class_String>` **download_file**

+-----------+--------------------------+
| *Default* | ``""``                   |
+-----------+--------------------------+
| *Setter*  | set_download_file(value) |
+-----------+--------------------------+
| *Getter*  | get_download_file()      |
+-----------+--------------------------+

The file to download into. Will output any received file into it.

----

.. _class_HTTPRequest_property_max_redirects:

- :ref:`int<class_int>` **max_redirects**

+-----------+--------------------------+
| *Default* | ``8``                    |
+-----------+--------------------------+
| *Setter*  | set_max_redirects(value) |
+-----------+--------------------------+
| *Getter*  | get_max_redirects()      |
+-----------+--------------------------+

Maximum number of allowed redirects.

----

.. _class_HTTPRequest_property_timeout:

- :ref:`int<class_int>` **timeout**

+-----------+--------------------+
| *Default* | ``0``              |
+-----------+--------------------+
| *Setter*  | set_timeout(value) |
+-----------+--------------------+
| *Getter*  | get_timeout()      |
+-----------+--------------------+

----

.. _class_HTTPRequest_property_use_threads:

- :ref:`bool<class_bool>` **use_threads**

+-----------+------------------------+
| *Default* | ``false``              |
+-----------+------------------------+
| *Setter*  | set_use_threads(value) |
+-----------+------------------------+
| *Getter*  | is_using_threads()     |
+-----------+------------------------+

If ``true``, multithreading is used to improve performance.

Method Descriptions
-------------------

.. _class_HTTPRequest_method_cancel_request:

- void **cancel_request** **(** **)**

Cancels the current request.

----

.. _class_HTTPRequest_method_get_body_size:

- :ref:`int<class_int>` **get_body_size** **(** **)** |const|

Returns the response body length.

**Note:** Some Web servers may not send a body length. In this case, the value returned will be ``-1``. If using chunked transfer encoding, the body length will also be ``-1``.

----

.. _class_HTTPRequest_method_get_downloaded_bytes:

- :ref:`int<class_int>` **get_downloaded_bytes** **(** **)** |const|

Returns the amount of bytes this HTTPRequest downloaded.

----

.. _class_HTTPRequest_method_get_http_client_status:

- :ref:`Status<enum_HTTPClient_Status>` **get_http_client_status** **(** **)** |const|

Returns the current status of the underlying :ref:`HTTPClient<class_HTTPClient>`. See :ref:`Status<enum_HTTPClient_Status>`.

----

.. _class_HTTPRequest_method_request:

- :ref:`Error<enum_@GlobalScope_Error>` **request** **(** :ref:`String<class_String>` url, :ref:`PoolStringArray<class_PoolStringArray>` custom_headers=PoolStringArray(  ), :ref:`bool<class_bool>` ssl_validate_domain=true, :ref:`Method<enum_HTTPClient_Method>` method=0, :ref:`String<class_String>` request_data="" **)**

Creates request on the underlying :ref:`HTTPClient<class_HTTPClient>`. If there is no configuration errors, it tries to connect using :ref:`HTTPClient.connect_to_host<class_HTTPClient_method_connect_to_host>` and passes parameters onto :ref:`HTTPClient.request<class_HTTPClient_method_request>`.

Returns :ref:`@GlobalScope.OK<class_@GlobalScope_constant_OK>` if request is successfully created. (Does not imply that the server has responded), :ref:`@GlobalScope.ERR_UNCONFIGURED<class_@GlobalScope_constant_ERR_UNCONFIGURED>` if not in the tree, :ref:`@GlobalScope.ERR_BUSY<class_@GlobalScope_constant_ERR_BUSY>` if still processing previous request, :ref:`@GlobalScope.ERR_INVALID_PARAMETER<class_@GlobalScope_constant_ERR_INVALID_PARAMETER>` if given string is not a valid URL format, or :ref:`@GlobalScope.ERR_CANT_CONNECT<class_@GlobalScope_constant_ERR_CANT_CONNECT>` if not using thread and the :ref:`HTTPClient<class_HTTPClient>` cannot connect to host.

**Note:** The ``request_data`` parameter is ignored if ``method`` is :ref:`HTTPClient.METHOD_GET<class_HTTPClient_constant_METHOD_GET>`. This is because GET methods can't contain request data. As a workaround, you can pass request data as a query string in the URL. See :ref:`String.http_escape<class_String_method_http_escape>` for an example.

.. |virtual| replace:: :abbr:`virtual (This method should typically be overridden by the user to have any effect.)`
.. |const| replace:: :abbr:`const (This method has no side effects. It doesn't modify any of the instance's member variables.)`
.. |vararg| replace:: :abbr:`vararg (This method accepts any number of arguments after the ones described here.)`