291 lines
15 KiB
XML
291 lines
15 KiB
XML
<?xml version="1.0" encoding="UTF-8" ?>
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<class name="HTTPRequest" inherits="Node" version="4.0">
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<brief_description>
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A node with the ability to send HTTP(S) requests.
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</brief_description>
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<description>
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A node with the ability to send HTTP requests. Uses [HTTPClient] internally.
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Can be used to make HTTP requests, i.e. download or upload files or web content via HTTP.
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[b]Warning:[/b] See the notes and warnings on [HTTPClient] for limitations, especially regarding SSL security.
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[b]Note:[/b] When exporting to Android, make sure to enable the [code]INTERNET[/code] permission in the Android export preset before exporting the project or using one-click deploy. Otherwise, network communication of any kind will be blocked by Android.
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[b]Example of contacting a REST API and printing one of its returned fields:[/b]
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[codeblocks]
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[gdscript]
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func _ready():
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# Create an HTTP request node and connect its completion signal.
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var http_request = HTTPRequest.new()
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add_child(http_request)
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http_request.connect("request_completed", self, "_http_request_completed")
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# Perform a GET request. The URL below returns JSON as of writing.
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var error = http_request.request("https://httpbin.org/get")
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if error != OK:
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push_error("An error occurred in the HTTP request.")
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# Perform a POST request. The URL below returns JSON as of writing.
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# Note: Don't make simultaneous requests using a single HTTPRequest node.
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# The snippet below is provided for reference only.
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var body = {"name": "Godette"}
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error = http_request.request("https://httpbin.org/post", [], true, HTTPClient.METHOD_POST, body)
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if error != OK:
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push_error("An error occurred in the HTTP request.")
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# Called when the HTTP request is completed.
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func _http_request_completed(result, response_code, headers, body):
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var response = parse_json(body.get_string_from_utf8())
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# Will print the user agent string used by the HTTPRequest node (as recognized by httpbin.org).
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print(response.headers["User-Agent"])
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[/gdscript]
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[csharp]
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public override void _Ready()
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{
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// Create an HTTP request node and connect its completion signal.
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var httpRequest = new HTTPRequest();
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AddChild(httpRequest);
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httpRequest.Connect("request_completed", this, nameof(HttpRequestCompleted));
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// Perform a GET request. The URL below returns JSON as of writing.
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Error error = httpRequest.Request("https://httpbin.org/get");
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if (error != Error.Ok)
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{
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GD.PushError("An error occurred in the HTTP request.");
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}
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// Perform a POST request. The URL below returns JSON as of writing.
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// Note: Don't make simultaneous requests using a single HTTPRequest node.
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// The snippet below is provided for reference only.
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string[] body = { "name", "Godette" };
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// GDScript to_json is non existent, so we use JSON.Print() here.
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error = httpRequest.Request("https://httpbin.org/post", null, true, HTTPClient.Method.Post, JSON.Print(body));
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if (error != Error.Ok)
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{
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GD.PushError("An error occurred in the HTTP request.");
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}
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}
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// Called when the HTTP request is completed.
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private void HttpRequestCompleted(int result, int response_code, string[] headers, byte[] body)
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{
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// GDScript parse_json is non existent so we have to use JSON.parse, which has a slightly different syntax.
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var response = JSON.Parse(body.GetStringFromUTF8()).Result as Godot.Collections.Dictionary;
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// Will print the user agent string used by the HTTPRequest node (as recognized by httpbin.org).
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GD.Print((response["headers"] as Godot.Collections.Dictionary)["User-Agent"]);
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}
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[/csharp]
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[/codeblocks]
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[b]Example of loading and displaying an image using HTTPRequest:[/b]
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[codeblocks]
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[gdscript]
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func _ready():
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# Create an HTTP request node and connect its completion signal.
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var http_request = HTTPRequest.new()
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add_child(http_request)
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http_request.connect("request_completed", self, "_http_request_completed")
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# Perform the HTTP request. The URL below returns a PNG image as of writing.
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var error = http_request.request("https://via.placeholder.com/512")
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if error != OK:
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push_error("An error occurred in the HTTP request.")
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# Called when the HTTP request is completed.
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func _http_request_completed(result, response_code, headers, body):
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if result != HTTPRequest.RESULT_SUCCESS:
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push_error("Image couldn't be downloaded. Try a different image.")
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var image = Image.new()
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var error = image.load_png_from_buffer(body)
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if error != OK:
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push_error("Couldn't load the image.")
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var texture = ImageTexture.new()
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texture.create_from_image(image)
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# Display the image in a TextureRect node.
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var texture_rect = TextureRect.new()
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add_child(texture_rect)
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texture_rect.texture = texture
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[/gdscript]
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[csharp]
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public override void _Ready()
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{
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// Create an HTTP request node and connect its completion signal.
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var httpRequest = new HTTPRequest();
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AddChild(httpRequest);
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httpRequest.Connect("request_completed", this, nameof(HttpRequestCompleted));
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// Perform the HTTP request. The URL below returns a PNG image as of writing.
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Error error = httpRequest.Request("https://via.placeholder.com/512");
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if (error != Error.Ok)
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{
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GD.PushError("An error occurred in the HTTP request.");
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}
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}
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// Called when the HTTP request is completed.
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private void HttpRequestCompleted(int result, int response_code, string[] headers, byte[] body)
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{
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if (result != (int)HTTPRequest.Result.Success)
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{
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GD.PushError("Image couldn't be downloaded. Try a different image.");
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}
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var image = new Image();
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Error error = image.LoadPngFromBuffer(body);
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if (error != Error.Ok)
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{
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GD.PushError("Couldn't load the image.");
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}
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var texture = new ImageTexture();
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texture.CreateFromImage(image);
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// Display the image in a TextureRect node.
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var textureRect = new TextureRect();
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AddChild(textureRect);
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textureRect.Texture = texture;
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}
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[/csharp]
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[/codeblocks]
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[b]Gzipped response bodies[/b]: HTTPRequest will automatically handle decompression of response bodies. A [code]Accept-Encoding[/code] header will be automatically added to each of your requests, unless one is already specified. Any response with a [code]Content-Encoding: gzip[/code] header will automatically be decompressed and delivered to you as uncompressed bytes.
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</description>
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<tutorials>
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<link title="Making HTTP requests">https://docs.godotengine.org/en/latest/tutorials/networking/http_request_class.html</link>
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<link title="SSL certificates">https://docs.godotengine.org/en/latest/tutorials/networking/ssl_certificates.html</link>
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</tutorials>
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<methods>
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<method name="cancel_request">
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<return type="void" />
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<description>
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Cancels the current request.
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</description>
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</method>
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<method name="get_body_size" qualifiers="const">
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<return type="int" />
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<description>
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Returns the response body length.
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[b]Note:[/b] Some Web servers may not send a body length. In this case, the value returned will be [code]-1[/code]. If using chunked transfer encoding, the body length will also be [code]-1[/code].
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</description>
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</method>
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<method name="get_downloaded_bytes" qualifiers="const">
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<return type="int" />
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<description>
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Returns the amount of bytes this HTTPRequest downloaded.
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</description>
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</method>
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<method name="get_http_client_status" qualifiers="const">
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<return type="int" enum="HTTPClient.Status" />
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<description>
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Returns the current status of the underlying [HTTPClient]. See [enum HTTPClient.Status].
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</description>
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</method>
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<method name="request">
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<return type="int" enum="Error" />
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<argument index="0" name="url" type="String" />
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<argument index="1" name="custom_headers" type="PackedStringArray" default="PackedStringArray()" />
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<argument index="2" name="ssl_validate_domain" type="bool" default="true" />
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<argument index="3" name="method" type="int" enum="HTTPClient.Method" default="0" />
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<argument index="4" name="request_data" type="String" default="""" />
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<description>
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Creates request on the underlying [HTTPClient]. If there is no configuration errors, it tries to connect using [method HTTPClient.connect_to_host] and passes parameters onto [method HTTPClient.request].
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Returns [constant OK] if request is successfully created. (Does not imply that the server has responded), [constant ERR_UNCONFIGURED] if not in the tree, [constant ERR_BUSY] if still processing previous request, [constant ERR_INVALID_PARAMETER] if given string is not a valid URL format, or [constant ERR_CANT_CONNECT] if not using thread and the [HTTPClient] cannot connect to host.
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[b]Note:[/b] When [code]method[/code] is [constant HTTPClient.METHOD_GET], the payload sent via [code]request_data[/code] might be ignored by the server or even cause the server to reject the request (check [url=https://datatracker.ietf.org/doc/html/rfc7231#section-4.3.1]RFC 7231 section 4.3.1[/url] for more details). As a workaround, you can send data as a query string in the URL (see [method String.uri_encode] for an example).
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[b]Note:[/b] It's recommended to use transport encryption (SSL/TLS) and to avoid sending sensitive information (such as login credentials) in HTTP GET URL parameters. Consider using HTTP POST requests or HTTP headers for such information instead.
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</description>
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</method>
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<method name="request_raw">
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<return type="int" enum="Error" />
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<argument index="0" name="url" type="String" />
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<argument index="1" name="custom_headers" type="PackedStringArray" default="PackedStringArray()" />
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<argument index="2" name="ssl_validate_domain" type="bool" default="true" />
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<argument index="3" name="method" type="int" enum="HTTPClient.Method" default="0" />
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<argument index="4" name="request_data_raw" type="PackedByteArray" default="PackedByteArray()" />
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<description>
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Creates request on the underlying [HTTPClient] using a raw array of bytes for the request body. If there is no configuration errors, it tries to connect using [method HTTPClient.connect_to_host] and passes parameters onto [method HTTPClient.request].
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Returns [constant OK] if request is successfully created. (Does not imply that the server has responded), [constant ERR_UNCONFIGURED] if not in the tree, [constant ERR_BUSY] if still processing previous request, [constant ERR_INVALID_PARAMETER] if given string is not a valid URL format, or [constant ERR_CANT_CONNECT] if not using thread and the [HTTPClient] cannot connect to host.
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</description>
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</method>
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</methods>
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<members>
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<member name="accept_gzip" type="bool" setter="set_accept_gzip" getter="is_accepting_gzip" default="true">
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If [code]true[/code], this header will be added to each request: [code]Accept-Encoding: gzip, deflate[/code] telling servers that it's okay to compress response bodies.
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Any Response body declaring a [code]Content-Encoding[/code] of either [code]gzip[/code] or [code]deflate[/code] will then be automatically decompressed, and the uncompressed bytes will be delivered via [code]request_completed[/code].
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If the user has specified their own [code]Accept-Encoding[/code] header, then no header will be added regardless of [code]accept_gzip[/code].
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If [code]false[/code] no header will be added, and no decompression will be performed on response bodies. The raw bytes of the response body will be returned via [code]request_completed[/code].
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</member>
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<member name="body_size_limit" type="int" setter="set_body_size_limit" getter="get_body_size_limit" default="-1">
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Maximum allowed size for response bodies. If the response body is compressed, this will be used as the maximum allowed size for the decompressed body.
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</member>
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<member name="download_chunk_size" type="int" setter="set_download_chunk_size" getter="get_download_chunk_size" default="65536">
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The size of the buffer used and maximum bytes to read per iteration. See [member HTTPClient.read_chunk_size].
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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.
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</member>
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<member name="download_file" type="String" setter="set_download_file" getter="get_download_file" default="""">
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The file to download into. Will output any received file into it.
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</member>
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<member name="max_redirects" type="int" setter="set_max_redirects" getter="get_max_redirects" default="8">
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Maximum number of allowed redirects.
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</member>
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<member name="timeout" type="int" setter="set_timeout" getter="get_timeout" default="0">
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</member>
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<member name="use_threads" type="bool" setter="set_use_threads" getter="is_using_threads" default="false">
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If [code]true[/code], multithreading is used to improve performance.
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</member>
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</members>
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<signals>
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<signal name="request_completed">
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<argument index="0" name="result" type="int" />
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<argument index="1" name="response_code" type="int" />
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<argument index="2" name="headers" type="PackedStringArray" />
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<argument index="3" name="body" type="PackedByteArray" />
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<description>
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Emitted when a request is completed.
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</description>
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</signal>
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</signals>
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<constants>
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<constant name="RESULT_SUCCESS" value="0" enum="Result">
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Request successful.
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</constant>
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<constant name="RESULT_CHUNKED_BODY_SIZE_MISMATCH" value="1" enum="Result">
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</constant>
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<constant name="RESULT_CANT_CONNECT" value="2" enum="Result">
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Request failed while connecting.
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</constant>
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<constant name="RESULT_CANT_RESOLVE" value="3" enum="Result">
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Request failed while resolving.
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</constant>
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<constant name="RESULT_CONNECTION_ERROR" value="4" enum="Result">
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Request failed due to connection (read/write) error.
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</constant>
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<constant name="RESULT_SSL_HANDSHAKE_ERROR" value="5" enum="Result">
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Request failed on SSL handshake.
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</constant>
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<constant name="RESULT_NO_RESPONSE" value="6" enum="Result">
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Request does not have a response (yet).
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</constant>
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<constant name="RESULT_BODY_SIZE_LIMIT_EXCEEDED" value="7" enum="Result">
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Request exceeded its maximum size limit, see [member body_size_limit].
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</constant>
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<constant name="RESULT_BODY_DECOMPRESS_FAILED" value="8" enum="Result">
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</constant>
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<constant name="RESULT_REQUEST_FAILED" value="9" enum="Result">
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Request failed (currently unused).
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</constant>
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<constant name="RESULT_DOWNLOAD_FILE_CANT_OPEN" value="10" enum="Result">
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HTTPRequest couldn't open the download file.
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</constant>
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<constant name="RESULT_DOWNLOAD_FILE_WRITE_ERROR" value="11" enum="Result">
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HTTPRequest couldn't write to the download file.
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</constant>
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<constant name="RESULT_REDIRECT_LIMIT_REACHED" value="12" enum="Result">
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Request reached its maximum redirect limit, see [member max_redirects].
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</constant>
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<constant name="RESULT_TIMEOUT" value="13" enum="Result">
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</constant>
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</constants>
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</class>
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