Add getUserAgent function that includes plugin information

interface/src/Application.cpp

@@ -1057,6 +1057,40 @@ Application::Application(int& argc, char** argv, QElapsedTimer& startupTimer) :
     firstRun.set(false);
 }
 
+QString Application::getUserAgent() {
+    if (QThread::currentThread() != thread()) {
+        QString userAgent;
+
+        QMetaObject::invokeMethod(this, "getUserAgent", Qt::BlockingQueuedConnection, Q_RETURN_ARG(QString, userAgent));
+
+        return userAgent;
+    }
+
+    QString userAgent = "Mozilla/5.0 (HighFidelityInterface/" + BuildInfo::VERSION + "; "
+        + QSysInfo::productType() + " " + QSysInfo::productVersion() + ")";
+
+    auto formatPluginName = [](QString name) -> QString { return name.trimmed().replace(" ", "-");  };
+
+    // For each plugin, add to userAgent
+    auto displayPlugins = PluginManager::getInstance()->getDisplayPlugins();
+    foreach(auto dp, displayPlugins) {
+        if (dp->isActive() && dp->isHmd()) {
+            userAgent += " " + formatPluginName(dp->getName());
+        }
+    }
+
+    // For each plugin, add to userAgent
+    auto inputPlugins= PluginManager::getInstance()->getInputPlugins();
+    foreach(auto ip, inputPlugins) {
+        if (ip->isActive()) {
+            userAgent += " " + formatPluginName(ip->getName());
+        }
+    }
+
+    return userAgent;
+}
+
+
 
 void Application::checkChangeCursor() {
     QMutexLocker locker(&_changeCursorLock);

interface/src/Application.h

@@ -112,6 +112,9 @@ public:
     QString getPreviousScriptLocation();
     void setPreviousScriptLocation(const QString& previousScriptLocation);
 
+    // Return an HTTP User-Agent string with OS and device information.
+    Q_INVOKABLE QString getUserAgent();
+
     void initializeGL();
     void initializeUi();
     void paintGL();