diff --git a/3rdparty/o2/src/o1requestor.h b/3rdparty/o2/src/o1requestor.h
new file mode 100644
index 0000000000000000000000000000000000000000..7a4c283d81b9c9a2e7fa7a0529fe93676d8d02f7
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+++ b/3rdparty/o2/src/o1requestor.h
@@ -0,0 +1,61 @@
+#ifndef O1REQUESTOR_H
+#define O1REQUESTOR_H
+
+#include <QObject>
+#include <QNetworkRequest>
+#include <QByteArray>
+
+#include "o1.h"
+
+class QNetworkAccessManager;
+class QNetworkReply;
+class O1;
+
+/// Makes authenticated requests using OAuth 1.0.
+class O1Requestor: public QObject {
+    Q_OBJECT
+
+public:
+    explicit O1Requestor(QNetworkAccessManager *manager, O1 *authenticator, QObject *parent = 0);
+
+public slots:
+    /// Make a GET request.
+    /// @param  req                 Network request.
+    /// @param  signingParameters   Extra (non-OAuth) parameters participating in signing.
+    /// @return Reply.
+    QNetworkReply *get(const QNetworkRequest &req, const QList<O1RequestParameter> &signingParameters);
+
+    /// Make a POST request.
+    /// @param  req                 Network request.
+    /// @param  signingParameters   Extra (non-OAuth) parameters participating in signing.
+    /// @param  data                Request payload.
+    /// @return Reply.
+    QNetworkReply *post(const QNetworkRequest &req, const QList<O1RequestParameter> &signingParameters, const QByteArray &data);
+
+    /// Make a POST request.
+    /// @param  req                 Network request.
+    /// @param  signingParameters   Extra (non-OAuth) parameters participating in signing.
+    /// @param  multiPart           HTTPMultiPart.
+    /// @return Reply.
+    QNetworkReply *post(const QNetworkRequest &req, const QList<O1RequestParameter> &signingParameters, QHttpMultiPart *multiPart);
+
+    /// Make a PUT request.
+    /// @param  req                 Network request.
+    /// @param  signingParameters   Extra (non-OAuth) parameters participating in signing.
+    /// @param  data                Request payload.
+    /// @return Reply.
+    QNetworkReply *put(const QNetworkRequest &req, const QList<O1RequestParameter> &signingParameters, const QByteArray &data);
+
+protected:
+    /// Return new request based on the original, with the "Authentication:" header added.
+    QNetworkRequest setup(const QNetworkRequest &request, const QList<O1RequestParameter> &signingParameters, QNetworkAccessManager::Operation operation);
+
+    /// Augment reply with a timer.
+    QNetworkReply *addTimer(QNetworkReply *reply);
+
+    QNetworkAccessManager *manager_;
+    O1 *authenticator_;
+};
+
+
+#endif // O1REQUESTOR_H