added handling for different compression types

reddit/compression.go

@@ -0,0 +1,26 @@
+package reddit
+
+import (
+	"compress/gzip"
+	"compress/zlib"
+	"io"
+	"net/http"
+	"strings"
+
+	"github.com/andybalholm/brotli"
+)
+
+func ResponseReader(resp *http.Response) (io.ReadCloser, error) {
+	encoding := resp.Header.Get("Content-Encoding")
+	switch strings.ToLower(encoding) {
+	case "deflate":
+		return zlib.NewReader(resp.Body)
+	case "gzip":
+		return gzip.NewReader(resp.Body)
+	case "br":
+		return io.NopCloser(brotli.NewReader(resp.Body)), nil
+	case "zstd":
+		return zlib.NewReader(resp.Body)
+	}
+	return resp.Body, nil
+}