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refactor: Let caller decide which error pipeStreamAndErrors should throw

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This commit is contained in:
Joachim Van Herwegen
2020-09-25 09:53:19 +02:00
parent fa935cc4c7
commit 006f7ea7aa
2 changed files with 6 additions and 4 deletions
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7
src/util/Util.ts
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@@ -2,7 +2,6 @@ import type { Readable, Writable } from 'stream';
import arrayifyStream from 'arrayify-stream';
import { DataFactory } from 'n3';
import type { Literal, NamedNode, Quad } from 'rdf-js';
import { UnsupportedHttpError } from './errors/UnsupportedHttpError';
/**
* Makes sure the input path has exactly 1 slash at the end.
@@ -60,12 +59,14 @@ export const matchingMediaType = (mediaA: string, mediaB: string): boolean => {
* Makes sure an error of the first stream gets passed to the second.
* @param readable - Initial readable stream.
* @param destination - The destination for writing data.
* @param mapError - Optional function that takes the error and converts it to a new error.
*
* @returns The destination stream.
*/
export const pipeStreamsAndErrors = <T extends Writable>(readable: Readable, destination: T): T => {
export const pipeStreamsAndErrors = <T extends Writable>(readable: Readable, destination: T,
mapError?: (error: Error) => Error): T => {
readable.pipe(destination);
readable.on('error', (error): boolean => destination.emit('error', new UnsupportedHttpError(error.message)));
readable.on('error', (error): boolean => destination.emit('error', mapError ? mapError(error) : error));
return destination;
};