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'use strict'; const { AbortError, codes, } = require('internal/errors'); const { ERR_INVALID_ARG_TYPE, ERR_STREAM_PREMATURE_CLOSE } = codes; const { kEmptyObject, once, } = require('internal/util'); const { validateAbortSignal, validateFunction, validateObject, } = require('internal/validators'); const { Promise } = primordials; const { isClosed, isReadable, isReadableNodeStream, isReadableFinished, isReadableErrored, isWritable, isWritableNodeStream, isWritableFinished, isWritableErrored, isNodeStream, willEmitClose: _willEmitClose, } = require('internal/streams/utils'); function isRequest(stream) { return stream.setHeader && typeof stream.abort === 'function'; } const nop = () => {}; function eos(stream, options, callback) { if (arguments.length === 2) { callback = options; options = kEmptyObject; } else if (options == null) { options = kEmptyObject; } else { validateObject(options, 'options'); } validateFunction(callback, 'callback'); validateAbortSignal(options.signal, 'options.signal'); callback = once(callback); const readable = options.readable ?? isReadableNodeStream(stream); const writable = options.writable ?? isWritableNodeStream(stream); if (!isNodeStream(stream)) { // TODO: Webstreams. throw new ERR_INVALID_ARG_TYPE('stream', 'Stream', stream); } const wState = stream._writableState; const rState = stream._readableState; const onlegacyfinish = () => { if (!stream.writable) { onfinish(); } }; // TODO (ronag): Improve soft detection to include core modules and // common ecosystem modules that do properly emit 'close' but fail // this generic check. let willEmitClose = ( _willEmitClose(stream) && isReadableNodeStream(stream) === readable && isWritableNodeStream(stream) === writable ); let writableFinished = isWritableFinished(stream, false); const onfinish = () => { writableFinished = true; // Stream should not be destroyed here. If it is that // means that user space is doing something differently and // we cannot trust willEmitClose. if (stream.destroyed) { willEmitClose = false; } if (willEmitClose && (!stream.readable || readable)) { return; } if (!readable || readableFinished) { callback.call(stream); } }; let readableFinished = isReadableFinished(stream, false); const onend = () => { readableFinished = true; // Stream should not be destroyed here. If it is that // means that user space is doing something differently and // we cannot trust willEmitClose. if (stream.destroyed) { willEmitClose = false; } if (willEmitClose && (!stream.writable || writable)) { return; } if (!writable || writableFinished) { callback.call(stream); } }; const onerror = (err) => { callback.call(stream, err); }; let closed = isClosed(stream); const onclose = () => { closed = true; const errored = isWritableErrored(stream) || isReadableErrored(stream); if (errored && typeof errored !== 'boolean') { return callback.call(stream, errored); } if (readable && !readableFinished && isReadableNodeStream(stream, true)) { if (!isReadableFinished(stream, false)) return callback.call(stream, new ERR_STREAM_PREMATURE_CLOSE()); } if (writable && !writableFinished) { if (!isWritableFinished(stream, false)) return callback.call(stream, new ERR_STREAM_PREMATURE_CLOSE()); } callback.call(stream); }; const onrequest = () => { stream.req.on('finish', onfinish); }; if (isRequest(stream)) { stream.on('complete', onfinish); if (!willEmitClose) { stream.on('abort', onclose); } if (stream.req) { onrequest(); } else { stream.on('request', onrequest); } } else if (writable && !wState) { // legacy streams stream.on('end', onlegacyfinish); stream.on('close', onlegacyfinish); } // Not all streams will emit 'close' after 'aborted'. if (!willEmitClose && typeof stream.aborted === 'boolean') { stream.on('aborted', onclose); } stream.on('end', onend); stream.on('finish', onfinish); if (options.error !== false) { stream.on('error', onerror); } stream.on('close', onclose); if (closed) { process.nextTick(onclose); } else if (wState?.errorEmitted || rState?.errorEmitted) { if (!willEmitClose) { process.nextTick(onclose); } } else if ( !readable && (!willEmitClose || isReadable(stream)) && (writableFinished || isWritable(stream) === false) ) { process.nextTick(onclose); } else if ( !writable && (!willEmitClose || isWritable(stream)) && (readableFinished || isReadable(stream) === false) ) { process.nextTick(onclose); } else if ((rState && stream.req && stream.aborted)) { process.nextTick(onclose); } const cleanup = () => { callback = nop; stream.removeListener('aborted', onclose); stream.removeListener('complete', onfinish); stream.removeListener('abort', onclose); stream.removeListener('request', onrequest); if (stream.req) stream.req.removeListener('finish', onfinish); stream.removeListener('end', onlegacyfinish); stream.removeListener('close', onlegacyfinish); stream.removeListener('finish', onfinish); stream.removeListener('end', onend); stream.removeListener('error', onerror); stream.removeListener('close', onclose); }; if (options.signal && !closed) { const abort = () => { // Keep it because cleanup removes it. const endCallback = callback; cleanup(); endCallback.call( stream, new AbortError(undefined, { cause: options.signal.reason })); }; if (options.signal.aborted) { process.nextTick(abort); } else { const originalCallback = callback; callback = once((...args) => { options.signal.removeEventListener('abort', abort); originalCallback.apply(stream, args); }); options.signal.addEventListener('abort', abort); } } return cleanup; } function finished(stream, opts) { return new Promise((resolve, reject) => { eos(stream, opts, (err) => { if (err) { reject(err); } else { resolve(); } }); }); } module.exports = eos; module.exports.finished = finished; |