CityBEM-CityLayers-SaeedRay.../node_modules/decompress-response/index.js

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'use strict';
const PassThrough = require('stream').PassThrough;
const zlib = require('zlib');
const mimicResponse = require('mimic-response');
module.exports = response => {
// TODO: Use Array#includes when targeting Node.js 6
if (['gzip', 'deflate'].indexOf(response.headers['content-encoding']) === -1) {
return response;
}
const unzip = zlib.createUnzip();
const stream = new PassThrough();
mimicResponse(response, stream);
unzip.on('error', err => {
if (err.code === 'Z_BUF_ERROR') {
stream.end();
return;
}
stream.emit('error', err);
});
response.pipe(unzip).pipe(stream);
return stream;
};