add: add download_report_export request support

gvm/protocols/gmp/_gmpnext.py

@@ -1844,3 +1844,21 @@ def get_report_export(
                 report_export_id=report_export_id,
             )
         )
+
+    def download_report_export(
+        self,
+        report_export_id: EntityID,
+    ) -> T:
+        """Request a download report export.
+
+        Args:
+            report_export_id: UUID of the report export.
+
+        Returns:
+            A request for the download_report_export GMP command.
+        """
+        return self._send_request_and_transform_response(
+            ReportExports.download_report_export(
+                report_export_id=report_export_id,
+            )
+        )

gvm/protocols/gmp/requests/next/_report_exports.py

@@ -53,3 +53,33 @@ def get_report_export(
         )
 
         return cmd
+
+    @classmethod
+    def download_report_export(
+        cls,
+        report_export_id: EntityID,
+    ) -> Request:
+        """Request a download report export.
+
+        Args:
+            report_export_id: UUID of the report export.
+
+        Returns:
+            A request for the download_report_export GMP command.
+
+        Raises:
+            RequiredArgument: If report_export_id is not provided.
+        """
+        if not report_export_id:
+            raise RequiredArgument(
+                function=cls.get_report_export.__name__,
+                argument="report_export_id",
+            )
+
+        cmd = XmlCommand("download_report_export")
+        cmd.set_attribute(
+            "report_export_id",
+            str(report_export_id),
+        )
+
+        return cmd

tests/protocols/gmpnext/entities/report_exports/__init__.py

@@ -2,10 +2,12 @@
 #
 # SPDX-License-Identifier: GPL-3.0-or-later
 
+from .test_download_report_export import GmpDownloadReportExportTestMixin
 from .test_get_report_export import GmpGetReportExportTestMixin
 from .test_get_report_exports import GmpGetReportExportsTestMixin
 
 __all__ = [
+    "GmpDownloadReportExportTestMixin",
     "GmpGetReportExportTestMixin",
     "GmpGetReportExportsTestMixin",
 ]

tests/protocols/gmpnext/entities/report_exports/test_download_report_export.py

@@ -0,0 +1,21 @@
+# SPDX-FileCopyrightText: 2026 Greenbone AG
+#
+# SPDX-License-Identifier: GPL-3.0-or-later
+#
+from gvm.errors import RequiredArgument
+
+
+class GmpDownloadReportExportTestMixin:
+    def test_download_report_export_without_id(self):
+        with self.assertRaises(RequiredArgument):
+            self.gmp.download_report_export(None)
+
+        with self.assertRaises(RequiredArgument):
+            self.gmp.download_report_export("")
+
+    def test_download_report_export_with_id(self):
+        self.gmp.download_report_export(report_export_id="e1")
+
+        self.connection.send.has_been_called_with(
+            b'<download_report_export report_export_id="e1"/>'
+        )

tests/protocols/gmpnext/entities/test_report_exports.py

@@ -5,6 +5,7 @@
 
 from ...gmpnext import GMPTestCase
 from .report_exports import (
+    GmpDownloadReportExportTestMixin,
     GmpGetReportExportsTestMixin,
     GmpGetReportExportTestMixin,
 )
@@ -16,3 +17,9 @@ class GmpGmpGetReportExportsTestCase(GmpGetReportExportsTestMixin, GMPTestCase):
 
 class GmpGmpGetReportExportTestCase(GmpGetReportExportTestMixin, GMPTestCase):
     pass
+
+
+class GmpGmpDownloadReportExportTestCase(
+    GmpDownloadReportExportTestMixin, GMPTestCase
+):
+    pass