Fixing Z_BUF_ERROR when no content (#4701)

* Fix Z_BUF_ERROR when no content

* Refactored code

* Fix undefined check

Co-authored-by: Jay <jasonsaayman@gmail.com>

lib/adapters/http.js

@@ -236,9 +236,14 @@ module.exports = function httpAdapter(config) {
       // return the last request in case of redirects
       var lastRequest = res.req || req;
 
+      // if decompress disabled we should not decompress
+      if (config.decompress !== false) {
+        // if no content, but headers still say that it is encoded,
+        // remove the header not confuse downstream operations
+        if (data && data.length === 0 && res.headers['content-encoding']) {
+          delete res.headers['content-encoding'];
+        }
 
-      // if no content, is HEAD request or decompress disabled we should not decompress
-      if (res.statusCode !== 204 && lastRequest.method !== 'HEAD' && config.decompress !== false) {
         switch (res.headers['content-encoding']) {
         /*eslint default-case:0*/
         case 'gzip':