http_client.h

/**************************************************************************/
/*  http_client.h                                                         */
/**************************************************************************/
/*                         This file is part of:                          */
/*                             GODOT ENGINE                               */
/*                        https://godotengine.org                         */
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/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur.                  */
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#pragma once

#include "core/crypto/crypto.h"
#include "core/io/ip.h"
#include "core/io/stream_peer.h"
#include "core/io/stream_peer_tcp.h"
#include "core/object/ref_counted.h"

class HTTPClient : public RefCounted {
	GDCLASS(HTTPClient, RefCounted);

public:
	enum ResponseCode {
		// 1xx informational
		RESPONSE_CONTINUE = 100,
		RESPONSE_SWITCHING_PROTOCOLS = 101,
		RESPONSE_PROCESSING = 102,

		// 2xx successful
		RESPONSE_OK = 200,
		RESPONSE_CREATED = 201,
		RESPONSE_ACCEPTED = 202,
		RESPONSE_NON_AUTHORITATIVE_INFORMATION = 203,
		RESPONSE_NO_CONTENT = 204,
		RESPONSE_RESET_CONTENT = 205,
		RESPONSE_PARTIAL_CONTENT = 206,
		RESPONSE_MULTI_STATUS = 207,
		RESPONSE_ALREADY_REPORTED = 208,
		RESPONSE_IM_USED = 226,

		// 3xx redirection
		RESPONSE_MULTIPLE_CHOICES = 300,
		RESPONSE_MOVED_PERMANENTLY = 301,
		RESPONSE_FOUND = 302,
		RESPONSE_SEE_OTHER = 303,
		RESPONSE_NOT_MODIFIED = 304,
		RESPONSE_USE_PROXY = 305,
		RESPONSE_SWITCH_PROXY = 306,
		RESPONSE_TEMPORARY_REDIRECT = 307,
		RESPONSE_PERMANENT_REDIRECT = 308,

		// 4xx client error
		RESPONSE_BAD_REQUEST = 400,
		RESPONSE_UNAUTHORIZED = 401,
		RESPONSE_PAYMENT_REQUIRED = 402,
		RESPONSE_FORBIDDEN = 403,
		RESPONSE_NOT_FOUND = 404,
		RESPONSE_METHOD_NOT_ALLOWED = 405,
		RESPONSE_NOT_ACCEPTABLE = 406,
		RESPONSE_PROXY_AUTHENTICATION_REQUIRED = 407,
		RESPONSE_REQUEST_TIMEOUT = 408,
		RESPONSE_CONFLICT = 409,
		RESPONSE_GONE = 410,
		RESPONSE_LENGTH_REQUIRED = 411,
		RESPONSE_PRECONDITION_FAILED = 412,
		RESPONSE_REQUEST_ENTITY_TOO_LARGE = 413,
		RESPONSE_REQUEST_URI_TOO_LONG = 414,
		RESPONSE_UNSUPPORTED_MEDIA_TYPE = 415,
		RESPONSE_REQUESTED_RANGE_NOT_SATISFIABLE = 416,
		RESPONSE_EXPECTATION_FAILED = 417,
		RESPONSE_IM_A_TEAPOT = 418,
		RESPONSE_MISDIRECTED_REQUEST = 421,
		RESPONSE_UNPROCESSABLE_ENTITY = 422,
		RESPONSE_LOCKED = 423,
		RESPONSE_FAILED_DEPENDENCY = 424,
		RESPONSE_UPGRADE_REQUIRED = 426,
		RESPONSE_PRECONDITION_REQUIRED = 428,
		RESPONSE_TOO_MANY_REQUESTS = 429,
		RESPONSE_REQUEST_HEADER_FIELDS_TOO_LARGE = 431,
		RESPONSE_UNAVAILABLE_FOR_LEGAL_REASONS = 451,

		// 5xx server error
		RESPONSE_INTERNAL_SERVER_ERROR = 500,
		RESPONSE_NOT_IMPLEMENTED = 501,
		RESPONSE_BAD_GATEWAY = 502,
		RESPONSE_SERVICE_UNAVAILABLE = 503,
		RESPONSE_GATEWAY_TIMEOUT = 504,
		RESPONSE_HTTP_VERSION_NOT_SUPPORTED = 505,
		RESPONSE_VARIANT_ALSO_NEGOTIATES = 506,
		RESPONSE_INSUFFICIENT_STORAGE = 507,
		RESPONSE_LOOP_DETECTED = 508,
		RESPONSE_NOT_EXTENDED = 510,
		RESPONSE_NETWORK_AUTH_REQUIRED = 511,

	};

	enum Method {
		METHOD_GET,
		METHOD_HEAD,
		METHOD_POST,
		METHOD_PUT,
		METHOD_DELETE,
		METHOD_OPTIONS,
		METHOD_TRACE,
		METHOD_CONNECT,
		METHOD_PATCH,
		METHOD_MAX

	};

	enum Status {
		STATUS_DISCONNECTED,
		STATUS_RESOLVING, // Resolving hostname (if passed a hostname)
		STATUS_CANT_RESOLVE,
		STATUS_CONNECTING, // Connecting to IP
		STATUS_CANT_CONNECT,
		STATUS_CONNECTED, // Connected, requests can be made
		STATUS_REQUESTING, // Request in progress
		STATUS_BODY, // Request resulted in body, which must be read
		STATUS_CONNECTION_ERROR,
		STATUS_TLS_HANDSHAKE_ERROR,

	};

protected:
	static const char *_methods[METHOD_MAX];
	static const int HOST_MIN_LEN = 4;

	enum Port {
		PORT_HTTP = 80,
		PORT_HTTPS = 443,

	};

	PackedStringArray _get_response_headers();
	Dictionary _get_response_headers_as_dictionary();
	Error _request_raw(Method p_method, const String &p_url, const Vector<String> &p_headers, const Vector<uint8_t> &p_body);
	Error _request(Method p_method, const String &p_url, const Vector<String> &p_headers, const String &p_body = String());

	static HTTPClient *(*_create)(bool p_notify_postinitialize);

	static void _bind_methods();

public:
	static HTTPClient *create(bool p_notify_postinitialize = true);

	String query_string_from_dict(const Dictionary &p_dict);
	Error verify_headers(const Vector<String> &p_headers);

	virtual Error request(Method p_method, const String &p_url, const Vector<String> &p_headers, const uint8_t *p_body, int p_body_size) = 0;
	virtual Error connect_to_host(const String &p_host, int p_port = -1, Ref<TLSOptions> p_tls_options = Ref<TLSOptions>()) = 0;

	virtual void set_connection(const Ref<StreamPeer> &p_connection) = 0;
	virtual Ref<StreamPeer> get_connection() const = 0;

	virtual void close() = 0;

	virtual Status get_status() const = 0;

	virtual bool has_response() const = 0;
	virtual bool is_response_chunked() const = 0;
	virtual int get_response_code() const = 0;
	virtual Error get_response_headers(List<String> *r_response) = 0;
	virtual int64_t get_response_body_length() const = 0;

	virtual PackedByteArray read_response_body_chunk() = 0; // Can't get body as partial text because of most encodings UTF8, gzip, etc.

	virtual void set_blocking_mode(bool p_enable) = 0; // Useful mostly if running in a thread
	virtual bool is_blocking_mode_enabled() const = 0;

	virtual void set_read_chunk_size(int p_size) = 0;
	virtual int get_read_chunk_size() const = 0;

	virtual Error poll() = 0;

	// Use empty string or -1 to unset
	virtual void set_http_proxy(const String &p_host, int p_port);
	virtual void set_https_proxy(const String &p_host, int p_port);

	HTTPClient() {}
	virtual ~HTTPClient() {}
};

VARIANT_ENUM_CAST(HTTPClient::ResponseCode)
VARIANT_ENUM_CAST(HTTPClient::Method);
VARIANT_ENUM_CAST(HTTPClient::Status);