colyseus.js/build/esm/transport/H3Transport.mjs.map

Colyseus Multiplayer SDK for JavaScript/TypeScript

{"version":3,"file":"H3Transport.mjs","sources":["../../../src/transport/H3Transport.ts"],"sourcesContent":["import { ITransport, ITransportEventMap } from \"./ITransport\";\nimport { encode, decode, Iterator } from '@colyseus/schema';\n\nexport class H3TransportTransport implements ITransport {\n    wt: WebTransport;\n    isOpen: boolean = false;\n\n    reader: ReadableStreamDefaultReader;\n    writer: WritableStreamDefaultWriter;\n\n    unreliableReader: ReadableStreamDefaultReader<Uint8Array>;\n    unreliableWriter: WritableStreamDefaultWriter<Uint8Array>;\n\n    private lengthPrefixBuffer = new Uint8Array(9); // 9 bytes is the maximum length of a length prefix\n\n    constructor(public events: ITransportEventMap) { }\n\n    public connect(url: string, options: any = {}) {\n        const wtOpts: WebTransportOptions = options.fingerprint && ({\n            // requireUnreliable: true,\n            // congestionControl: \"default\", // \"low-latency\" || \"throughput\"\n\n            serverCertificateHashes: [{\n                algorithm: 'sha-256',\n                value: new Uint8Array(options.fingerprint).buffer\n            }]\n        }) || undefined;\n\n        this.wt = new WebTransport(url, wtOpts);\n\n        this.wt.ready.then((e) => {\n            console.log(\"WebTransport ready!\", e)\n            this.isOpen = true;\n\n            this.unreliableReader = this.wt.datagrams.readable.getReader();\n            this.unreliableWriter = this.wt.datagrams.writable.getWriter();\n\n            const incomingBidi = this.wt.incomingBidirectionalStreams.getReader();\n            incomingBidi.read().then((stream) => {\n                this.reader = stream.value.readable.getReader();\n                this.writer = stream.value.writable.getWriter();\n\n                // immediately write room/sessionId for establishing the room connection\n                this.sendSeatReservation(options.room.roomId, options.sessionId, options.reconnectionToken);\n\n                // start reading incoming data\n                this.readIncomingData();\n                this.readIncomingUnreliableData();\n\n            }).catch((e) => {\n                console.error(\"failed to read incoming stream\", e);\n                console.error(\"TODO: close the connection\");\n            });\n\n            // this.events.onopen(e);\n        }).catch((e: WebTransportCloseInfo) => {\n            // this.events.onerror(e);\n            // this.events.onclose({ code: e.closeCode, reason: e.reason });\n            console.log(\"WebTransport not ready!\", e)\n            this._close();\n        });\n\n        this.wt.closed.then((e: WebTransportCloseInfo) => {\n            console.log(\"WebTransport closed w/ success\", e)\n            this.events.onclose({ code: e.closeCode, reason: e.reason });\n\n        }).catch((e: WebTransportCloseInfo) => {\n            console.log(\"WebTransport closed w/ error\", e)\n            this.events.onerror(e);\n            this.events.onclose({ code: e.closeCode, reason: e.reason });\n        }).finally(() => {\n            this._close();\n        });\n    }\n\n    public send(data: Buffer | Uint8Array): void {\n        const prefixLength = encode.number(this.lengthPrefixBuffer as any, data.length, { offset: 0 });\n        const dataWithPrefixedLength = new Uint8Array(prefixLength + data.length);\n        dataWithPrefixedLength.set(this.lengthPrefixBuffer.subarray(0, prefixLength), 0);\n        dataWithPrefixedLength.set(data, prefixLength);\n        this.writer.write(dataWithPrefixedLength);\n    }\n\n    public sendUnreliable(data: Buffer | Uint8Array): void {\n        const prefixLength = encode.number(this.lengthPrefixBuffer as any, data.length, { offset: 0 });\n        const dataWithPrefixedLength = new Uint8Array(prefixLength + data.length);\n        dataWithPrefixedLength.set(this.lengthPrefixBuffer.subarray(0, prefixLength), 0);\n        dataWithPrefixedLength.set(data, prefixLength);\n        this.unreliableWriter.write(dataWithPrefixedLength);\n    }\n\n    public close(code?: number, reason?: string) {\n        try {\n            this.wt.close({ closeCode: code, reason: reason });\n        } catch (e) {\n            console.error(e);\n        }\n    }\n\n    protected async readIncomingData() {\n        let result: ReadableStreamReadResult<Uint8Array>;\n\n        while (this.isOpen) {\n            try {\n                result = await this.reader.read();\n\n                //\n                // a single read may contain multiple messages\n                // each message is prefixed with its length\n                //\n\n                const messages = result.value;\n                const it: Iterator = { offset: 0 };\n                do {\n                    //\n                    // QUESTION: should we buffer the message in case it's not fully read?\n                    //\n\n                    const length = decode.number(messages as any, it);\n                    this.events.onmessage({ data: messages.subarray(it.offset, it.offset + length) });\n                    it.offset += length;\n                } while (it.offset < messages.length);\n\n            } catch (e) {\n                if (e.message.indexOf(\"session is closed\") === -1) {\n                    console.error(\"H3Transport: failed to read incoming data\", e);\n                }\n                break;\n            }\n\n            if (result.done) {\n                break;\n            }\n        }\n    }\n\n    protected async readIncomingUnreliableData() {\n        let result: ReadableStreamReadResult<Uint8Array>;\n\n        while (this.isOpen) {\n            try {\n                result = await this.unreliableReader.read();\n\n                //\n                // a single read may contain multiple messages\n                // each message is prefixed with its length\n                //\n\n                const messages = result.value;\n                const it: Iterator = { offset: 0 };\n                do {\n                    //\n                    // QUESTION: should we buffer the message in case it's not fully read?\n                    //\n\n                    const length = decode.number(messages as any, it);\n                    this.events.onmessage({ data: messages.subarray(it.offset, it.offset + length) });\n                    it.offset += length;\n                } while (it.offset < messages.length);\n\n            } catch (e) {\n                if (e.message.indexOf(\"session is closed\") === -1) {\n                    console.error(\"H3Transport: failed to read incoming data\", e);\n                }\n                break;\n            }\n\n            if (result.done) {\n                break;\n            }\n        }\n    }\n\n    protected sendSeatReservation (roomId: string, sessionId: string, reconnectionToken?: string) {\n        const it: Iterator = { offset: 0 };\n        const bytes: number[] = [];\n\n        encode.string(bytes, roomId, it);\n        encode.string(bytes, sessionId, it);\n\n        if (reconnectionToken) {\n            encode.string(bytes, reconnectionToken, it);\n        }\n\n        this.writer.write(new Uint8Array(bytes).buffer);\n    }\n\n    protected _close() {\n        this.isOpen = false;\n    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