fix lint warnings

classes/headers.js

@@ -0,0 +1,27 @@
+class Headers {
+  constructor(rawHeaders) {
+    this.rawHeaders = rawHeaders;
+  }
+
+  entries() {
+    return Object.entries(this.rawHeaders);
+  }
+
+  keys() {
+    return Object.keys(this.rawHeaders);
+  }
+
+  values() {
+    return Object.values(this.rawHeaders);
+  }
+
+  get(name) {
+    return this.rawHeaders[name.toLowerCase()] || null;
+  }
+
+  has(name) {
+    return !!this.get(name);
+  }
+}
+
+module.exports = Headers;

classes/response.js

@@ -0,0 +1,33 @@
+const fs = require('fs');
+const Headers = require('./headers.js');
+
+class Response {
+  constructor(raw, cacheFilePath, fromCache) {
+    Object.assign(this, raw);
+    this.cacheFilePath = cacheFilePath;
+    this.headers = new Headers(raw.headers);
+    this.fromCache = fromCache;
+
+    if (this.bodyBuffer.type === 'Buffer') {
+      this.bodyBuffer = Buffer.from(this.bodyBuffer);
+    }
+  }
+
+  text() {
+    return this.bodyBuffer.toString();
+  }
+
+  json() {
+    return JSON.parse(this.bodyBuffer.toString());
+  }
+
+  buffer() {
+    return this.bodyBuffer;
+  }
+
+  ejectFromCache() {
+    return fs.promises.unlink(this.cacheFilePath);
+  }
+}
+
+module.exports = Response;