replay/route: adds retry on network failures (#31948)

tools/replay/route.cc

@@ -59,18 +59,27 @@ bool Route::load() {
   return !segments_.empty();
 }
 
-bool Route::loadFromServer() {
+bool Route::loadFromServer(int retries) {
+  for (int i = 1; i <= retries; ++i) {
+    QString result;
     QEventLoop loop;
     HttpRequest http(nullptr, !Hardware::PC());
-  QObject::connect(&http, &HttpRequest::requestDone, [&](const QString &json, bool success, QNetworkReply::NetworkError error) {
-    if (error == QNetworkReply::ContentAccessDenied || error == QNetworkReply::AuthenticationRequiredError) {
-      qWarning() << ">>  Unauthorized. Authenticate with tools/lib/auth.py  <<";
-    }
-
-    loop.exit(success ? loadFromJson(json) : 0);
+    QObject::connect(&http, &HttpRequest::requestDone, [&loop, &result](const QString &json, bool success, QNetworkReply::NetworkError err) {
+      result = json;
+      loop.exit((int)err);
     });
     http.sendRequest(CommaApi::BASE_URL + "/v1/route/" + route_.str + "/files");
-  return loop.exec();
+    auto err = (QNetworkReply::NetworkError)loop.exec();
+    if (err == QNetworkReply::NoError) {
+      return loadFromJson(result);
+    } else if (err == QNetworkReply::ContentAccessDenied || err == QNetworkReply::AuthenticationRequiredError) {
+      rWarning(">>  Unauthorized. Authenticate with tools/lib/auth.py  <<");
+      return false;
+    }
+    rWarning("Retrying %d/%d", i, retries);
+    util::sleep_for(500);
+  }
+  return false;
 }
 
 bool Route::loadFromJson(const QString &json) {

tools/replay/route.h

@@ -42,7 +42,7 @@ public:
 
 protected:
   bool loadFromLocal();
-  bool loadFromServer();
+  bool loadFromServer(int retries = 3);
   bool loadFromJson(const QString &json);
   void addFileToSegment(int seg_num, const QString &file);
   RouteIdentifier route_ = {};