2 Commits

3 changed files with 30 additions and 8 deletions
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@@ -1,4 +1,4 @@
# stream-to-push-stream # @push-stream-std/stream-to-push-stream
Convert native Node.js streams to push-stream source, sink, and duplex interfaces. Convert native Node.js streams to push-stream source, sink, and duplex interfaces.
@@ -41,8 +41,7 @@ npm config set -- //hub.kl1.tenere.ai/api/packages/push-stream-std/npm/:_authTok
npm install @push-stream-std/stream-to-push-stream npm install @push-stream-std/stream-to-push-stream
``` ```
## Description ## Why
Utilities for bridging between the Node.js `stream` module (Readable, Writable, Duplex) and the push-stream protocol. PushSource wraps a Readable, listening to `data`/`end`/`error` events and implementing `pipe()`, `resume()`, and `abort()`. PushSink wraps a Writable, translating `write()` calls to `writable.write()` with `drain`-based backpressure and `end()` to `writable.end()`. PushDuplex wraps a Duplex stream as a combined source/sink for bidirectional push-stream pipelines. Utilities for bridging between the Node.js `stream` module (Readable, Writable, Duplex) and the push-stream protocol. PushSource wraps a Readable, listening to `data`/`end`/`error` events and implementing `pipe()`, `resume()`, and `abort()`. PushSink wraps a Writable, translating `write()` calls to `writable.write()` with `drain`-based backpressure and `end()` to `writable.end()`. PushDuplex wraps a Duplex stream as a combined source/sink for bidirectional push-stream pipelines.
## API ## API
@@ -78,8 +77,5 @@ Tests cover readable-to-source data flow and end handling, writable-to-sink writ
## Requirements ## Requirements
Node.js 18 or later. ESM only. Node.js 22 or later. ESM only.
## License
MIT
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@@ -1,5 +1,12 @@
import { Readable, Writable, Duplex } from 'stream'; import { Readable, Writable, Duplex } from 'stream';
/**
* stream-to-push-stream - Convert Node.js streams to push-streams
*
* Bridges Node.js Readable/Writable/Duplex streams into the push-stream protocol
* so they can be composed with `@push-stream-std/*` operators.
*/
class PushSource { class PushSource {
constructor(readable) { constructor(readable) {
this.readable = readable; this.readable = readable;
@@ -223,6 +230,11 @@ class PushDuplex {
} }
} }
/**
* Wrap a Node.js Readable stream as a push-stream source.
* @param {import('stream').Readable} readableStream
* @returns {object} A push-stream source
*/
export function source(readableStream) { export function source(readableStream) {
if (!(readableStream instanceof Readable)) { if (!(readableStream instanceof Readable)) {
throw new Error('Expected a Node.js Readable stream'); throw new Error('Expected a Node.js Readable stream');
@@ -230,6 +242,11 @@ export function source(readableStream) {
return new PushSource(readableStream); return new PushSource(readableStream);
} }
/**
* Wrap a Node.js Writable stream as a push-stream sink.
* @param {import('stream').Writable} writableStream
* @returns {object} A push-stream sink
*/
export function sink(writableStream) { export function sink(writableStream) {
if (!(writableStream instanceof Writable)) { if (!(writableStream instanceof Writable)) {
throw new Error('Expected a Node.js Writable stream'); throw new Error('Expected a Node.js Writable stream');
@@ -237,6 +254,11 @@ export function sink(writableStream) {
return new PushSink(writableStream); return new PushSink(writableStream);
} }
/**
* Wrap a Node.js Duplex stream as a push-stream duplex (`{ source, sink }`).
* @param {import('stream').Duplex} duplexStream
* @returns {{source: object, sink: object}} Push-stream duplex
*/
export function duplex(duplexStream) { export function duplex(duplexStream) {
if (!(duplexStream instanceof Duplex)) { if (!(duplexStream instanceof Duplex)) {
throw new Error('Expected a Node.js Duplex stream'); throw new Error('Expected a Node.js Duplex stream');
+5 -1
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@@ -1,6 +1,6 @@
{ {
"name": "@push-stream-std/stream-to-push-stream", "name": "@push-stream-std/stream-to-push-stream",
"version": "1.0.1", "version": "1.0.3",
"description": "Convert Node.js streams to push-streams", "description": "Convert Node.js streams to push-streams",
"type": "module", "type": "module",
"main": "index.js", "main": "index.js",
@@ -29,5 +29,9 @@
], ],
"publishConfig": { "publishConfig": {
"registry": "https://hub.kl1.tenere.ai/api/packages/push-stream-std/npm/" "registry": "https://hub.kl1.tenere.ai/api/packages/push-stream-std/npm/"
},
"repository": {
"type": "git",
"url": "https://hub.kl1.tenere.ai/push-stream-std/stream-to-push-stream.git"
} }
} }