199 lines
9.2 KiB
XML
199 lines
9.2 KiB
XML
<?xml version="1.0" encoding="UTF-8" ?>
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<class name="HTTPRequest" inherits="Node" version="3.2">
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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]Example of contacting a REST API and printing one of its returned fields:[/b]
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[codeblock]
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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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[/codeblock]
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[b]Example of loading and displaying an image using HTTPRequest:[/b]
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[codeblock]
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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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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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[/codeblock]
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[b]Note:[/b] 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 [url=https://developer.mozilla.org/en-US/docs/Web/HTTP/CORS]CORS[/url]. If you host the server in question, you should modify its backend to allow requests from foreign origins by adding the [code]Access-Control-Allow-Origin: *[/code] HTTP header.
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[b]Note:[/b] 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.
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</description>
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<tutorials>
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<link>https://docs.godotengine.org/en/3.2/tutorials/networking/http_request_class.html</link>
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<link>https://docs.godotengine.org/en/3.2/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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</return>
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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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</return>
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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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</return>
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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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</return>
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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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</return>
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<argument index="0" name="url" type="String">
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</argument>
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<argument index="1" name="custom_headers" type="PoolStringArray" default="PoolStringArray( )">
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</argument>
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<argument index="2" name="ssl_validate_domain" type="bool" default="true">
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</argument>
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<argument index="3" name="method" type="int" enum="HTTPClient.Method" default="0">
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</argument>
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<argument index="4" name="request_data" type="String" default="""">
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</argument>
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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] The [code]request_data[/code] parameter is ignored if [code]method[/code] is [constant HTTPClient.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 [method String.http_escape] for an example.
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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="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.
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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>
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<argument index="1" name="response_code" type="int">
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</argument>
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<argument index="2" name="headers" type="PoolStringArray">
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</argument>
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<argument index="3" name="body" type="PoolByteArray">
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</argument>
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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_REQUEST_FAILED" value="8" 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="9" 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="10" 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="11" 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="12" enum="Result">
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</constant>
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</constants>
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</class>
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