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Improve bufferFromStream (#5826)

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Marcos Casagrande 2020-05-25 15:14:01 +02:00 committed by GitHub
parent fbbb9f1c36
commit c9f0e34e29
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1 changed files with 21 additions and 28 deletions
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49
cli/js/web/body.ts
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@ -59,36 +59,29 @@ function concatenate(...arrays: Uint8Array[]): ArrayBuffer {
return result.buffer as ArrayBuffer;
}
function bufferFromStream(stream: ReadableStreamReader): Promise<ArrayBuffer> {
return new Promise((resolve, reject): void => {
const parts: Uint8Array[] = [];
const encoder = new TextEncoder();
// recurse
(function pump(): void {
stream
.read()
.then(({ done, value }): void => {
if (done) {
return resolve(concatenate(...parts));
}
async function bufferFromStream(
stream: ReadableStreamReader
): Promise<ArrayBuffer> {
const parts: Uint8Array[] = [];
const encoder = new TextEncoder();
if (typeof value === "string") {
parts.push(encoder.encode(value));
} else if (value instanceof ArrayBuffer) {
parts.push(new Uint8Array(value));
} else if (!value) {
// noop for undefined
} else {
reject("unhandled type on stream read");
}
while (true) {
const { done, value } = await stream.read();
return pump();
})
.catch((err): void => {
reject(err);
});
})();
});
if (done) break;
if (typeof value === "string") {
parts.push(encoder.encode(value));
} else if (value instanceof ArrayBuffer) {
parts.push(new Uint8Array(value));
} else if (!value) {
// noop for undefined
} else {
throw new Error("unhandled type on stream read");
}
}
return concatenate(...parts);
}
export const BodyUsedError =