diff --git a/3rdparty/o2/src/o2requestor.h b/3rdparty/o2/src/o2requestor.h
new file mode 100644
index 0000000000000000000000000000000000000000..e356229c21728641302d1c656d063193bd65979b
--- /dev/null
+++ b/3rdparty/o2/src/o2requestor.h
@@ -0,0 +1,82 @@
+#ifndef O2REQUESTOR_H
+#define O2REQUESTOR_H
+
+#include <QObject>
+#include <QNetworkRequest>
+#include <QNetworkReply>
+#include <QNetworkAccessManager>
+#include <QUrl>
+#include <QByteArray>
+
+#include "o2reply.h"
+
+class O2;
+
+/// Makes authenticated requests.
+class O2Requestor: public QObject {
+    Q_OBJECT
+
+public:
+    explicit O2Requestor(QNetworkAccessManager *manager, O2 *authenticator, QObject *parent = 0);
+    ~O2Requestor();
+
+public slots:
+    /// Make a GET request.
+    /// @return Request ID or -1 if there are too many requests in the queue.
+    int get(const QNetworkRequest &req);
+
+    /// Make a POST request.
+    /// @return Request ID or -1 if there are too many requests in the queue.
+    int post(const QNetworkRequest &req, const QByteArray &data);
+
+    /// Make a PUT request.
+    /// @return Request ID or -1 if there are too many requests in the queue.
+    int put(const QNetworkRequest &req, const QByteArray &data);
+
+signals:
+    /// Emitted when a request has been completed or failed.
+    void finished(int id, QNetworkReply::NetworkError error, QByteArray data);
+
+    /// Emitted when an upload has progressed.
+    void uploadProgress(int id, qint64 bytesSent, qint64 bytesTotal);
+
+protected slots:
+    /// Handle refresh completion.
+    void onRefreshFinished(QNetworkReply::NetworkError error);
+
+    /// Handle request finished.
+    void onRequestFinished();
+
+    /// Handle request error.
+    void onRequestError(QNetworkReply::NetworkError error);
+
+    /// Re-try request (after successful token refresh).
+    void retry();
+
+    /// Finish the request, emit finished() signal.
+    void finish();
+
+    /// Handle upload progress.
+    void onUploadProgress(qint64 uploaded, qint64 total);
+
+protected:
+    int setup(const QNetworkRequest &request, QNetworkAccessManager::Operation operation);
+
+    enum Status {
+        Idle, Requesting, ReRequesting
+    };
+
+    QNetworkAccessManager *manager_;
+    O2 *authenticator_;
+    QNetworkRequest request_;
+    QByteArray data_;
+    QNetworkReply *reply_;
+    Status status_;
+    int id_;
+    QNetworkAccessManager::Operation operation_;
+    QUrl url_;
+    O2ReplyList timedReplies_;
+    QNetworkReply::NetworkError error_;
+};
+
+#endif // O2REQUESTOR_H