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29 lines
681 B
Plaintext
29 lines
681 B
Plaintext
"use strict";
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import stream from "stream";
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class ZlibHeaderTransformStream extends stream.Transform {
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__transform(chunk, encoding, callback) {
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this.push(chunk);
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callback();
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}
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_transform(chunk, encoding, callback) {
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if (chunk.length !== 0) {
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this._transform = this.__transform;
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// Add Default Compression headers if no zlib headers are present
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if (chunk[0] !== 120) { // Hex: 78
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const header = Buffer.alloc(2);
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header[0] = 120; // Hex: 78
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header[1] = 156; // Hex: 9C
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this.push(header, encoding);
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}
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}
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this.__transform(chunk, encoding, callback);
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}
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}
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export default ZlibHeaderTransformStream;
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