52 lines
1.6 KiB
JavaScript
52 lines
1.6 KiB
JavaScript
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/* c8 ignore start */
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// 64 KiB (same size chrome slice theirs blob into Uint8array's)
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const POOL_SIZE = 65536
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if (!globalThis.ReadableStream) {
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// `node:stream/web` got introduced in v16.5.0 as experimental
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// and it's preferred over the polyfilled version. So we also
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// suppress the warning that gets emitted by NodeJS for using it.
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try {
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const process = require('node:process')
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const { emitWarning } = process
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try {
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process.emitWarning = () => {}
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Object.assign(globalThis, require('node:stream/web'))
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process.emitWarning = emitWarning
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} catch (error) {
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process.emitWarning = emitWarning
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throw error
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}
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} catch (error) {
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// fallback to polyfill implementation
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Object.assign(globalThis, require('web-streams-polyfill/dist/ponyfill.es2018.js'))
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}
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}
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try {
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// Don't use node: prefix for this, require+node: is not supported until node v14.14
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// Only `import()` can use prefix in 12.20 and later
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const { Blob } = require('buffer')
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if (Blob && !Blob.prototype.stream) {
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Blob.prototype.stream = function name (params) {
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let position = 0
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const blob = this
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return new ReadableStream({
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type: 'bytes',
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async pull (ctrl) {
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const chunk = blob.slice(position, Math.min(blob.size, position + POOL_SIZE))
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const buffer = await chunk.arrayBuffer()
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position += buffer.byteLength
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ctrl.enqueue(new Uint8Array(buffer))
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if (position === blob.size) {
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ctrl.close()
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}
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}
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})
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}
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}
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} catch (error) {}
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/* c8 ignore end */
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