refactor: return full HTTP response for binary response bodies (#112)

api/gunzip.go

@@ -0,0 +1,34 @@
+package api
+
+import (
+	"compress/gzip"
+	"io"
+	"net/http"
+)
+
+func GunzipIfNeeded(resp *http.Response) (io.ReadCloser, error) {
+	if resp.Header.Get("Content-Encoding") == "gzip" {
+		gzr, err := gzip.NewReader(resp.Body)
+		if err != nil {
+			return resp.Body, err
+		}
+		return &gunzipReadCloser{underlying: resp.Body, gunzip: gzr}, nil
+	}
+	return resp.Body, nil
+}
+
+type gunzipReadCloser struct {
+	underlying io.ReadCloser
+	gunzip     io.ReadCloser
+}
+
+func (gzrc *gunzipReadCloser) Read(p []byte) (int, error) {
+	return gzrc.gunzip.Read(p)
+}
+
+func (gzrc *gunzipReadCloser) Close() error {
+	if err := gzrc.gunzip.Close(); err != nil {
+		return err
+	}
+	return gzrc.underlying.Close()
+}