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23 lines
613 B
23 lines
613 B
const { Transform } = require('stream'); |
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class HeaderHostTransformer extends Transform { |
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constructor(opts = {}) { |
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super(opts); |
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this.host = opts.host || 'localhost'; |
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this.replaced = false; |
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} |
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_transform(data, encoding, callback) { |
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callback( |
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null, |
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this.replaced // after replacing the first instance of the Host header we just become a regular passthrough |
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? data |
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: data.toString().replace(/(\r\n[Hh]ost: )\S+/, (match, $1) => { |
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this.replaced = true; |
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return $1 + this.host; |
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}) |
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); |
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} |
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} |
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module.exports = HeaderHostTransformer;
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