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'use strict';
const PassThrough = require('stream').PassThrough;
const zlib = require('zlib');
module.exports = res => {
// TODO: use Array#includes when targeting Node.js 6
if (['gzip', 'deflate'].indexOf(res.headers['content-encoding']) === -1) {
return res;
}
const unzip = zlib.createUnzip();
const stream = new PassThrough();
stream.httpVersion = res.httpVersion;
stream.headers = res.headers;
stream.rawHeaders = res.rawHeaders;
stream.trailers = res.trailers;
stream.rawTrailers = res.rawTrailers;
stream.setTimeout = res.setTimeout.bind(res);
stream.statusCode = res.statusCode;
stream.statusMessage = res.statusMessage;
stream.socket = res.socket;
unzip.on('error', err => {
if (err.code === 'Z_BUF_ERROR') {
stream.end();
return;
}
stream.emit('error', err);
});
res.pipe(unzip).pipe(stream);
return stream;
};
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