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'use strict';
const Readable = require('stream').Readable;
const lowercaseKeys = require('lowercase-keys');
class Response extends Readable {
constructor(statusCode, headers, body, url) {
if (typeof statusCode !== 'number') {
throw new TypeError('Argument `statusCode` should be a number');
}
if (typeof headers !== 'object') {
throw new TypeError('Argument `headers` should be an object');
}
if (!(body instanceof Buffer)) {
throw new TypeError('Argument `body` should be a buffer');
}
if (typeof url !== 'string') {
throw new TypeError('Argument `url` should be a string');
}
super();
this.statusCode = statusCode;
this.headers = lowercaseKeys(headers);
this.body = body;
this.url = url;
}
_read() {
this.push(this.body);
this.push(null);
}
}
module.exports = Response;
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