@libp2p/mplex/dist/src/stream.js

JavaScript implementation of https://github.com/libp2p/mplex

import { AbstractStream } from '@libp2p/utils/abstract-stream';
import { Uint8ArrayList } from 'uint8arraylist';
import { fromString as uint8ArrayFromString } from 'uint8arrays/from-string';
import { MAX_MSG_SIZE } from './decode.js';
import { InitiatorMessageTypes, ReceiverMessageTypes } from './message-types.js';
export class MplexStream extends AbstractStream {
    name;
    streamId;
    send;
    types;
    maxDataSize;
    constructor(init) {
        super(init);
        this.types = init.direction === 'outbound' ? InitiatorMessageTypes : ReceiverMessageTypes;
        this.send = init.send;
        this.name = init.name;
        this.streamId = init.streamId;
        this.maxDataSize = init.maxDataSize;
    }
    async sendNewStream() {
        await this.send({ id: this.streamId, type: InitiatorMessageTypes.NEW_STREAM, data: new Uint8ArrayList(uint8ArrayFromString(this.name)) });
    }
    async sendData(data) {
        data = data.sublist();
        while (data.byteLength > 0) {
            const toSend = Math.min(data.byteLength, this.maxDataSize);
            await this.send({
                id: this.streamId,
                type: this.types.MESSAGE,
                data: data.sublist(0, toSend)
            });
            data.consume(toSend);
        }
    }
    async sendReset() {
        await this.send({ id: this.streamId, type: this.types.RESET });
    }
    async sendCloseWrite() {
        await this.send({ id: this.streamId, type: this.types.CLOSE });
    }
    async sendCloseRead() {
        // mplex does not support close read, only close write
    }
}
export function createStream(options) {
    const { id, name, send, onEnd, type = 'initiator', maxMsgSize = MAX_MSG_SIZE } = options;
    return new MplexStream({
        id: type === 'initiator' ? (`i${id}`) : `r${id}`,
        streamId: id,
        name: `${name ?? id}`,
        direction: type === 'initiator' ? 'outbound' : 'inbound',
        maxDataSize: maxMsgSize,
        onEnd,
        send,
        log: options.logger.forComponent(`libp2p:mplex:stream:${type}:${id}`)
    });
}
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