Fixed Z_BUF_ERROR when content-encoding is set but the response body is empty; (#5250)

Fixed download progress capturing for compressed responses;

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

lib/adapters/http.js

@@ -373,6 +373,23 @@ export default function httpAdapter(config) {
 
       const streams = [res];
 
+      const responseLength = +res.headers['content-length'];
+
+      if (onDownloadProgress) {
+        const transformStream = new AxiosTransformStream({
+          length: utils.toFiniteNumber(responseLength),
+          maxRate: utils.toFiniteNumber(maxDownloadRate)
+        });
+
+        onDownloadProgress && transformStream.on('progress', progress => {
+          onDownloadProgress(Object.assign(progress, {
+            download: true
+          }));
+        });
+
+        streams.push(transformStream);
+      }
+
       // uncompress the response body transparently if required
       let responseStream = res;
 
@@ -383,7 +400,7 @@ export default function httpAdapter(config) {
       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']) {
+        if ((!responseLength || res.statusCode === 204) && res.headers['content-encoding']) {
           delete res.headers['content-encoding'];
         }
 
@@ -406,23 +423,6 @@ export default function httpAdapter(config) {
         }
       }
 
-      if (onDownloadProgress) {
-        const responseLength = +res.headers['content-length'];
-
-        const transformStream = new AxiosTransformStream({
-          length: utils.toFiniteNumber(responseLength),
-          maxRate: utils.toFiniteNumber(maxDownloadRate)
-        });
-
-        onDownloadProgress && transformStream.on('progress', progress => {
-          onDownloadProgress(Object.assign(progress, {
-            download: true
-          }));
-        });
-
-        streams.push(transformStream);
-      }
-
       responseStream = streams.length > 1 ? stream.pipeline(streams, utils.noop) : streams[0];
 
       const offListeners = stream.finished(responseStream, () => {