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denoland-deno/ext/node/polyfills/stream/consumers.mjs
Bartek Iwańczuk ce75e31625 refactor(core): include_js_files! 'dir' option doesn't change specifiers (#18019)
This commit changes "include_js_files!" macro from "deno_core"
in a way that "dir" option doesn't cause specifiers to be rewritten 
to include it.

Example:
```
include_js_files! {
  dir "js",
  "hello.js",
}
```

The above definition required embedders to use:
`import ... from "internal:<ext_name>/js/hello.js"`. 
But with this change, the "js" directory in which the files are stored
is an implementation detail, which for embedders results in: 
`import ... from "internal:<ext_name>/hello.js"`.

The directory the files are stored in, is an implementation detail and 
in some cases might result in a significant size difference for the 
snapshot. As an example, in "deno_node" extension, we store the 
source code in "polyfills" directory; which resulted in each specifier 
to look like "internal:deno_node/polyfills/<module_name>", but with 
this change it's "internal:deno_node/<module_name>". 

Given that "deno_node" has over 100 files, many of them having 
several import specifiers to the same extension, this change removes
10 characters from each import specifier.
2023-03-10 12:47:26 +09:00

78 lines
1.8 KiB
JavaScript

// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
// Copyright Joyent and Node contributors. All rights reserved. MIT license.
import { TextDecoder } from "internal:deno_web/08_text_encoding.js";
import { Buffer } from "internal:deno_node/buffer.ts";
/**
* @typedef {import('../_global.d.ts').ReadableStream
* } ReadableStream
* @typedef {import('../_stream.d.ts')} Readable
*/
/**
* @param {AsyncIterable|ReadableStream|Readable} stream
* @returns {Promise<Blob>}
*/
async function blob(stream) {
const chunks = [];
for await (const chunk of stream) {
chunks.push(chunk);
}
return new Blob(chunks);
}
/**
* @param {AsyncIterable|ReadableStream|Readable} stream
* @returns {Promise<ArrayBuffer>}
*/
async function arrayBuffer(stream) {
const ret = await blob(stream);
return ret.arrayBuffer();
}
/**
* @param {AsyncIterable|ReadableStream|Readable} stream
* @returns {Promise<Buffer>}
*/
async function buffer(stream) {
return Buffer.from(await arrayBuffer(stream));
}
/**
* @param {AsyncIterable|ReadableStream|Readable} stream
* @returns {Promise<string>}
*/
async function text(stream) {
const dec = new TextDecoder();
let str = "";
for await (const chunk of stream) {
if (typeof chunk === "string") {
str += chunk;
} else {
str += dec.decode(chunk, { stream: true });
}
}
// Flush the streaming TextDecoder so that any pending
// incomplete multibyte characters are handled.
str += dec.decode(undefined, { stream: false });
return str;
}
/**
* @param {AsyncIterable|ReadableStream|Readable} stream
* @returns {Promise<any>}
*/
async function json(stream) {
const str = await text(stream);
return JSON.parse(str);
}
export default {
arrayBuffer,
blob,
buffer,
json,
text,
};
export { arrayBuffer, blob, buffer, json, text };