Add appropriate user-agent string to requests

zip_streamer/build_info.go

@@ -0,0 +1,20 @@
+package zip_streamer
+
+import (
+	"runtime/debug"
+)
+
+func getVcsRevision() string {
+	buildInfo, ok := debug.ReadBuildInfo()
+	if !ok {
+		return "dev"
+	}
+
+	for _, setting := range buildInfo.Settings {
+		if setting.Key == "vcs.revision" {
+			return setting.Value[:8]
+		}
+	}
+
+	return "dev"
+}

zip_streamer/server.go

@@ -124,6 +124,7 @@ func retrieveZipDescriptorFromUrl(listfileUrl string, listfileBasicAuth string)
 		return nil, err
 	}
 	req.SetBasicAuth("", listfileBasicAuth)
+	req.Header.Set("User-Agent", fmt.Sprintf("isic-zipstreamer/%s", getVcsRevision()))
 	listfileResp, err := http.DefaultClient.Do(req)
 	if err != nil {
 		return nil, err

zip_streamer/zip_streamer.go

@@ -53,7 +53,13 @@ func retryableGet(url string) (*http.Response, error) {
 	for i := 0; i < NUM_RETRIES; i++ {
 		sleepDuration = time.Duration(math.Min(math.Pow(float64(2), float64(i)), float64(30))) * time.Second
 
-		resp, err := http.Get(url)
+		req, err := http.NewRequest("GET", url, nil)
+		if err != nil {
+			return nil, err
+		}
+		req.Header.Set("User-Agent", fmt.Sprintf("isic-zipstreamer/%s", getVcsRevision()))
+		resp, err := http.DefaultClient.Do(req)
+
 		if err != nil {
 			time.Sleep(sleepDuration)
 		} else if slices.Contains(retryableStatusCodes, resp.StatusCode) {