deno.land / std@0.177.1 / node / _stream.mjs
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d=c.read();if(d===null){o=u._read;return}if(!u.push(d))return}}),u._destroy=function(d,h){!d&&l!==null&&(d=new Df),o=null,r=null,i=null,l===null?h(d):(l=h,Mf(c,d))},u}});var vt=g((_u,ti)=>{"use strict";var{ArrayPrototypePop:qf,Promise:xf}=m(),{isIterable:Lf,isNodeStream:Pf}=V(),{pipelineImpl:kf}=Ye(),{finished:Wf}=Y();function Cf(...e){return new xf((t,n)=>{let r,i,o=e[e.length-1];if(o&&typeof o=="object"&&!Pf(o)&&!Lf(o)){let l=qf(e);r=l.signal,i=l.end}kf(e,(l,u)=>{l?n(l):t(u)},{signal:r,end:i})})}ti.exports={finished:Wf,pipeline:Cf}});var di=g((pu,si)=>{var{Buffer:jf}=__buffer$,{ObjectDefineProperty:H,ObjectKeys:ii,ReflectApply:oi}=m(),{promisify:{custom:li}}=j(),{streamReturningOperators:ni,promiseReturningOperators:ri}=xn(),{codes:{ERR_ILLEGAL_CONSTRUCTOR:ai}}=O(),$f=ei(),{pipeline:fi}=Ye(),{destroyer:vf}=Z(),ui=Y(),Ft=vt(),Ut=V(),R=si.exports=Le().Stream;R.isDisturbed=Ut.isDisturbed;R.isErrored=Ut.isErrored;R.isReadable=Ut.isReadable;R.Readable=we();for(let e of ii(ni)){let n=function(...r){if(new.target)throw ai();return R.Readable.from(oi(t,this,r))};Uf=n;let t=ni[e];H(n,"name",{__proto__:null,value:t.name}),H(n,"length",{__proto__:null,value:t.length}),H(R.Readable.prototype,e,{__proto__:null,value:n,enumerable:!1,configurable:!0,writable:!0})}var Uf;for(let e of ii(ri)){let n=function(...i){if(new.target)throw ai();return oi(t,this,i)};Uf=n;let t=ri[e];H(n,"name",{__proto__:null,value:t.name}),H(n,"length",{__proto__:null,value:t.length}),H(R.Readable.prototype,e,{__proto__:null,value:n,enumerable:!1,configurable:!0,writable:!0})}var Uf;R.Writable=Tt();R.Duplex=v();R.Transform=xt();R.PassThrough=Pt();R.pipeline=fi;var{addAbortSignal:Ff}=ke();R.addAbortSignal=Ff;R.finished=ui;R.destroy=vf;R.compose=$f;H(R,"promises",{__proto__:null,configurable:!0,enumerable:!0,get(){return Ft}});H(fi,li,{__proto__:null,enumerable:!0,get(){return Ft.pipeline}});H(ui,li,{__proto__:null,enumerable:!0,get(){return Ft.finished}});R.Stream=R;R._isUint8Array=function(t){return t instanceof Uint8Array};R._uint8ArrayToBuffer=function(t){return jf.from(t.buffer,t.byteOffset,t.byteLength)}});var ci=g((wu,A)=>{"use strict";var T=di(),Bf=vt(),Gf=T.Readable.destroy;A.exports=T.Readable;A.exports._uint8ArrayToBuffer=T._uint8ArrayToBuffer;A.exports._isUint8Array=T._isUint8Array;A.exports.isDisturbed=T.isDisturbed;A.exports.isErrored=T.isErrored;A.exports.isReadable=T.isReadable;A.exports.Readable=T.Readable;A.exports.Writable=T.Writable;A.exports.Duplex=T.Duplex;A.exports.Transform=T.Transform;A.exports.PassThrough=T.PassThrough;A.exports.addAbortSignal=T.addAbortSignal;A.exports.finished=T.finished;A.exports.destroy=T.destroy;A.exports.destroy=Gf;A.exports.pipeline=T.pipeline;A.exports.compose=T.compose;Object.defineProperty(T,"promises",{configurable:!0,enumerable:!0,get(){return Bf}});A.exports.Stream=T.Stream;A.exports.default=A.exports});var bi=Ri(ci()),{_uint8ArrayToBuffer:yu,_isUint8Array:gu,isDisturbed:Su,isErrored:Eu,isReadable:Ru,Readable:Au,Writable:mu,Duplex:Tu,Transform:Iu,PassThrough:Mu,addAbortSignal:Nu,finished:Du,destroy:Ou,pipeline:qu,compose:xu,Stream:Lu}=bi,{default:hi,...Hf}=bi,Pu=hi!==void 0?hi:Hf;export{Tu as Duplex,Mu as PassThrough,Au as Readable,Lu as Stream,Iu as Transform,mu as Writable,gu as _isUint8Array,yu as _uint8ArrayToBuffer,Nu as addAbortSignal,xu as compose,Pu as default,Ou as destroy,Du as finished,Su as isDisturbed,Eu as isErrored,Ru as isReadable,qu as pipeline};/* End esm.sh bundle */
// The following code implements Readable.fromWeb(), Writable.fromWeb(), and// Duplex.fromWeb(). These functions are not properly implemented in the// readable-stream module yet. This can be removed once the following upstream// issue is resolved: https://github.com/nodejs/readable-stream/issues/482
import { AbortError, ERR_INVALID_ARG_TYPE, ERR_INVALID_ARG_VALUE, ERR_STREAM_PREMATURE_CLOSE,} from "./internal/errors.ts";import { destroy } from "./internal/streams/destroy.mjs";import finished from "./internal/streams/end-of-stream.mjs";import { isDestroyed, isReadable, isReadableEnded, isWritable, isWritableEnded,} from "./internal/streams/utils.mjs";import { createDeferredPromise, kEmptyObject } from "./internal/util.mjs";import { validateBoolean, validateObject } from "./internal/validators.mjs";
const process = __process$;const { Buffer } = __buffer$;const Readable = Au;const Writable = mu;const Duplex = Tu;
function isReadableStream(object) { return object instanceof ReadableStream;}
function isWritableStream(object) { return object instanceof WritableStream;}
Readable.fromWeb = function ( readableStream, options = kEmptyObject,) { if (!isReadableStream(readableStream)) { throw new ERR_INVALID_ARG_TYPE( "readableStream", "ReadableStream", readableStream, ); }
validateObject(options, "options"); const { highWaterMark, encoding, objectMode = false, signal, } = options;
if (encoding !== undefined && !Buffer.isEncoding(encoding)) { throw new ERR_INVALID_ARG_VALUE(encoding, "options.encoding"); } validateBoolean(objectMode, "options.objectMode");
const reader = readableStream.getReader(); let closed = false;
const readable = new Readable({ objectMode, highWaterMark, encoding, signal,
read() { reader.read().then( (chunk) => { if (chunk.done) { readable.push(null); } else { readable.push(chunk.value); } }, (error) => destroy.call(readable, error), ); },
destroy(error, callback) { function done() { try { callback(error); } catch (error) { // In a next tick because this is happening within // a promise context, and if there are any errors // thrown we don't want those to cause an unhandled // rejection. Let's just escape the promise and // handle it separately. process.nextTick(() => { throw error; }); } }
if (!closed) { reader.cancel(error).then(done, done); return; }
done(); }, });
reader.closed.then( () => { closed = true; if (!isReadableEnded(readable)) { readable.push(null); } }, (error) => { closed = true; destroy.call(readable, error); }, );
return readable;};
Writable.fromWeb = function ( writableStream, options = kEmptyObject,) { if (!isWritableStream(writableStream)) { throw new ERR_INVALID_ARG_TYPE( "writableStream", "WritableStream", writableStream, ); }
validateObject(options, "options"); const { highWaterMark, decodeStrings = true, objectMode = false, signal, } = options;
validateBoolean(objectMode, "options.objectMode"); validateBoolean(decodeStrings, "options.decodeStrings");
const writer = writableStream.getWriter(); let closed = false;
const writable = new Writable({ highWaterMark, objectMode, decodeStrings, signal,
writev(chunks, callback) { function done(error) { error = error.filter((e) => e); try { callback(error.length === 0 ? undefined : error); } catch (error) { // In a next tick because this is happening within // a promise context, and if there are any errors // thrown we don't want those to cause an unhandled // rejection. Let's just escape the promise and // handle it separately. process.nextTick(() => destroy.call(writable, error)); } }
writer.ready.then( () => Promise.all( chunks.map((data) => writer.write(data.chunk)), ).then(done, done), done, ); },
write(chunk, encoding, callback) { if (typeof chunk === "string" && decodeStrings && !objectMode) { chunk = Buffer.from(chunk, encoding); chunk = new Uint8Array( chunk.buffer, chunk.byteOffset, chunk.byteLength, ); }
function done(error) { try { callback(error); } catch (error) { destroy(this, duplex, error); } }
writer.ready.then( () => writer.write(chunk).then(done, done), done, ); },
destroy(error, callback) { function done() { try { callback(error); } catch (error) { // In a next tick because this is happening within // a promise context, and if there are any errors // thrown we don't want those to cause an unhandled // rejection. Let's just escape the promise and // handle it separately. process.nextTick(() => { throw error; }); } }
if (!closed) { if (error != null) { writer.abort(error).then(done, done); } else { writer.close().then(done, done); } return; }
done(); },
final(callback) { function done(error) { try { callback(error); } catch (error) { // In a next tick because this is happening within // a promise context, and if there are any errors // thrown we don't want those to cause an unhandled // rejection. Let's just escape the promise and // handle it separately. process.nextTick(() => destroy.call(writable, error)); } }
if (!closed) { writer.close().then(done, done); } }, });
writer.closed.then( () => { closed = true; if (!isWritableEnded(writable)) { destroy.call(writable, new ERR_STREAM_PREMATURE_CLOSE()); } }, (error) => { closed = true; destroy.call(writable, error); }, );
return writable;};
Duplex.fromWeb = function (pair, options = kEmptyObject) { validateObject(pair, "pair"); const { readable: readableStream, writable: writableStream, } = pair;
if (!isReadableStream(readableStream)) { throw new ERR_INVALID_ARG_TYPE( "pair.readable", "ReadableStream", readableStream, ); } if (!isWritableStream(writableStream)) { throw new ERR_INVALID_ARG_TYPE( "pair.writable", "WritableStream", writableStream, ); }
validateObject(options, "options"); const { allowHalfOpen = false, objectMode = false, encoding, decodeStrings = true, highWaterMark, signal, } = options;
validateBoolean(objectMode, "options.objectMode"); if (encoding !== undefined && !Buffer.isEncoding(encoding)) { throw new ERR_INVALID_ARG_VALUE(encoding, "options.encoding"); }
const writer = writableStream.getWriter(); const reader = readableStream.getReader(); let writableClosed = false; let readableClosed = false;
const duplex = new Duplex({ allowHalfOpen, highWaterMark, objectMode, encoding, decodeStrings, signal,
writev(chunks, callback) { function done(error) { error = error.filter((e) => e); try { callback(error.length === 0 ? undefined : error); } catch (error) { // In a next tick because this is happening within // a promise context, and if there are any errors // thrown we don't want those to cause an unhandled // rejection. Let's just escape the promise and // handle it separately. process.nextTick(() => destroy(duplex, error)); } }
writer.ready.then( () => Promise.all( chunks.map((data) => writer.write(data.chunk)), ).then(done, done), done, ); },
write(chunk, encoding, callback) { if (typeof chunk === "string" && decodeStrings && !objectMode) { chunk = Buffer.from(chunk, encoding); chunk = new Uint8Array( chunk.buffer, chunk.byteOffset, chunk.byteLength, ); }
function done(error) { try { callback(error); } catch (error) { destroy(duplex, error); } }
writer.ready.then( () => writer.write(chunk).then(done, done), done, ); },
final(callback) { function done(error) { try { callback(error); } catch (error) { // In a next tick because this is happening within // a promise context, and if there are any errors // thrown we don't want those to cause an unhandled // rejection. Let's just escape the promise and // handle it separately. process.nextTick(() => destroy(duplex, error)); } }
if (!writableClosed) { writer.close().then(done, done); } },
read() { reader.read().then( (chunk) => { if (chunk.done) { duplex.push(null); } else { duplex.push(chunk.value); } }, (error) => destroy(duplex, error), ); },
destroy(error, callback) { function done() { try { callback(error); } catch (error) { // In a next tick because this is happening within // a promise context, and if there are any errors // thrown we don't want those to cause an unhandled // rejection. Let's just escape the promise and // handle it separately. process.nextTick(() => { throw error; }); } }
async function closeWriter() { if (!writableClosed) { await writer.abort(error); } }
async function closeReader() { if (!readableClosed) { await reader.cancel(error); } }
if (!writableClosed || !readableClosed) { Promise.all([ closeWriter(), closeReader(), ]).then(done, done); return; }
done(); }, });
writer.closed.then( () => { writableClosed = true; if (!isWritableEnded(duplex)) { destroy(duplex, new ERR_STREAM_PREMATURE_CLOSE()); } }, (error) => { writableClosed = true; readableClosed = true; destroy(duplex, error); }, );
reader.closed.then( () => { readableClosed = true; if (!isReadableEnded(duplex)) { duplex.push(null); } }, (error) => { writableClosed = true; readableClosed = true; destroy(duplex, error); }, );
return duplex;};
// readable-stream attaches these to Readable, but Node.js core does not.// Delete them here to better match Node.js core. These can be removed once// https://github.com/nodejs/readable-stream/issues/485 is resolved.delete Readable.Duplex;delete Readable.PassThrough;delete Readable.Readable;delete Readable.Stream;delete Readable.Transform;delete Readable.Writable;delete Readable._isUint8Array;delete Readable._uint8ArrayToBuffer;delete Readable.addAbortSignal;delete Readable.compose;delete Readable.destroy;delete Readable.finished;delete Readable.isDisturbed;delete Readable.isErrored;delete Readable.isReadable;delete Readable.pipeline;
// The following code implements Readable.toWeb(), Writable.toWeb(), and// Duplex.toWeb(). These functions are not properly implemented in the// readable-stream module yet. This can be removed once the following upstream// issue is resolved: https://github.com/nodejs/readable-stream/issues/482function newReadableStreamFromStreamReadable( streamReadable, options = kEmptyObject,) { // Not using the internal/streams/utils isReadableNodeStream utility // here because it will return false if streamReadable is a Duplex // whose readable option is false. For a Duplex that is not readable, // we want it to pass this check but return a closed ReadableStream. if (typeof streamReadable?._readableState !== "object") { throw new ERR_INVALID_ARG_TYPE( "streamReadable", "stream.Readable", streamReadable, ); }
if (isDestroyed(streamReadable) || !isReadable(streamReadable)) { const readable = new ReadableStream(); readable.cancel(); return readable; }
const objectMode = streamReadable.readableObjectMode; const highWaterMark = streamReadable.readableHighWaterMark;
const evaluateStrategyOrFallback = (strategy) => { // If there is a strategy available, use it if (strategy) { return strategy; }
if (objectMode) { // When running in objectMode explicitly but no strategy, we just fall // back to CountQueuingStrategy return new CountQueuingStrategy({ highWaterMark }); }
// When not running in objectMode explicitly, we just fall // back to a minimal strategy that just specifies the highWaterMark // and no size algorithm. Using a ByteLengthQueuingStrategy here // is unnecessary. return { highWaterMark }; };
const strategy = evaluateStrategyOrFallback(options?.strategy);
let controller;
function onData(chunk) { // Copy the Buffer to detach it from the pool. if (Buffer.isBuffer(chunk) && !objectMode) { chunk = new Uint8Array(chunk); } controller.enqueue(chunk); if (controller.desiredSize <= 0) { streamReadable.pause(); } }
streamReadable.pause();
const cleanup = finished(streamReadable, (error) => { if (error?.code === "ERR_STREAM_PREMATURE_CLOSE") { const err = new AbortError(undefined, { cause: error }); error = err; }
cleanup(); // This is a protection against non-standard, legacy streams // that happen to emit an error event again after finished is called. streamReadable.on("error", () => {}); if (error) { return controller.error(error); } controller.close(); });
streamReadable.on("data", onData);
return new ReadableStream({ start(c) { controller = c; },
pull() { streamReadable.resume(); },
cancel(reason) { destroy(streamReadable, reason); }, }, strategy);}
function newWritableStreamFromStreamWritable(streamWritable) { // Not using the internal/streams/utils isWritableNodeStream utility // here because it will return false if streamWritable is a Duplex // whose writable option is false. For a Duplex that is not writable, // we want it to pass this check but return a closed WritableStream. if (typeof streamWritable?._writableState !== "object") { throw new ERR_INVALID_ARG_TYPE( "streamWritable", "stream.Writable", streamWritable, ); }
if (isDestroyed(streamWritable) || !isWritable(streamWritable)) { const writable = new WritableStream(); writable.close(); return writable; }
const highWaterMark = streamWritable.writableHighWaterMark; const strategy = streamWritable.writableObjectMode ? new CountQueuingStrategy({ highWaterMark }) : { highWaterMark };
let controller; let backpressurePromise; let closed;
function onDrain() { if (backpressurePromise !== undefined) { backpressurePromise.resolve(); } }
const cleanup = finished(streamWritable, (error) => { if (error?.code === "ERR_STREAM_PREMATURE_CLOSE") { const err = new AbortError(undefined, { cause: error }); error = err; }
cleanup(); // This is a protection against non-standard, legacy streams // that happen to emit an error event again after finished is called. streamWritable.on("error", () => {}); if (error != null) { if (backpressurePromise !== undefined) { backpressurePromise.reject(error); } // If closed is not undefined, the error is happening // after the WritableStream close has already started. // We need to reject it here. if (closed !== undefined) { closed.reject(error); closed = undefined; } controller.error(error); controller = undefined; return; }
if (closed !== undefined) { closed.resolve(); closed = undefined; return; } controller.error(new AbortError()); controller = undefined; });
streamWritable.on("drain", onDrain);
return new WritableStream({ start(c) { controller = c; },
async write(chunk) { if (streamWritable.writableNeedDrain || !streamWritable.write(chunk)) { backpressurePromise = createDeferredPromise(); return backpressurePromise.promise.finally(() => { backpressurePromise = undefined; }); } },
abort(reason) { destroy(streamWritable, reason); },
close() { if (closed === undefined && !isWritableEnded(streamWritable)) { closed = createDeferredPromise(); streamWritable.end(); return closed.promise; }
controller = undefined; return Promise.resolve(); }, }, strategy);}
function newReadableWritablePairFromDuplex(duplex) { // Not using the internal/streams/utils isWritableNodeStream and // isReadableNodestream utilities here because they will return false // if the duplex was created with writable or readable options set to // false. Instead, we'll check the readable and writable state after // and return closed WritableStream or closed ReadableStream as // necessary. if ( typeof duplex?._writableState !== "object" || typeof duplex?._readableState !== "object" ) { throw new ERR_INVALID_ARG_TYPE("duplex", "stream.Duplex", duplex); }
if (isDestroyed(duplex)) { const writable = new WritableStream(); const readable = new ReadableStream(); writable.close(); readable.cancel(); return { readable, writable }; }
const writable = isWritable(duplex) ? newWritableStreamFromStreamWritable(duplex) : new WritableStream();
if (!isWritable(duplex)) { writable.close(); }
const readable = isReadable(duplex) ? newReadableStreamFromStreamReadable(duplex) : new ReadableStream();
if (!isReadable(duplex)) { readable.cancel(); }
return { writable, readable };}
Readable.toWeb = newReadableStreamFromStreamReadable;Writable.toWeb = newWritableStreamFromStreamWritable;Duplex.toWeb = newReadableWritablePairFromDuplex;
std
Version Info
11 months ago
