api: send User-Agent on network requests (#22965)

* api: set User-Agent on network requests

The format of the User-Agent header matches the format in `common/api/__init__.py`.

Closes #22954.

* Update selfdrive/ui/qt/util.cc

* fix parentheses

* refactor into function

Co-authored-by: Willem Melching <willem.melching@gmail.com>

selfdrive/ui/qt/api.cc

@@ -90,6 +90,7 @@ void HttpRequest::sendRequest(const QString &requestURL, const HttpRequest::Meth
 
   QNetworkRequest request;
   request.setUrl(QUrl(requestURL));
+  request.setRawHeader("User-Agent", getUserAgent().toUtf8());
 
   if (!token.isEmpty()) {
     request.setRawHeader(QByteArray("Authorization"), ("JWT " + token).toUtf8());

selfdrive/ui/qt/util.cc

@@ -8,12 +8,21 @@
 #include "selfdrive/common/swaglog.h"
 #include "selfdrive/hardware/hw.h"
 
+QString getVersion() {
+  static QString version =  QString::fromStdString(Params().get("Version"));
+  return version;
+}
+
 QString getBrand() {
   return Params().getBool("Passive") ? "dashcam" : "openpilot";
 }
 
 QString getBrandVersion() {
-  return getBrand() + " v" + QString::fromStdString(Params().get("Version")).left(14).trimmed();
+  return getBrand() + " v" + getVersion().left(14).trimmed();
+}
+
+QString getUserAgent() {
+  return "openpilot-" + getVersion();
 }
 
 std::optional<QString> getDongleId() {

selfdrive/ui/qt/util.h

@@ -9,8 +9,10 @@
 #include <QSurfaceFormat>
 #include <QWidget>
 
+QString getVersion();
 QString getBrand();
 QString getBrandVersion();
+QString getUserAgent();
 std::optional<QString> getDongleId();
 void configFont(QPainter &p, const QString &family, int size, const QString &style);
 void clearLayout(QLayout* layout);