[ADD] attachment_zipped_download: New addon.

TT33403

[UPD] Update attachment_zipped_download.pot

[UPD] README.rst

attachment_zipped_download/controllers/__init__.py

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+from . import main

attachment_zipped_download/controllers/main.py

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+# Copyright 2019 César Fernández Domínguez <cesfernandez@outlook.com>
+# Copyright 2022 Tecnativa - Víctor Martínez
+# License AGPL-3.0 or later (https://www.gnu.org/licenses/agpl)
+from odoo import _, http
+from odoo.http import request
+
+
+class AttachmentZippedDownloadController(http.Controller):
+    @http.route("/web/attachment/download_zip", type="http", auth="user")
+    def download_zip(self, ids=None, debug=0):
+        ids = [] if not ids else ids
+        if len(ids) == 0:
+            return
+        list_ids = map(int, ids.split(","))
+        out_file = request.env["ir.attachment"].browse(list_ids)._create_temp_zip()
+        return http.send_file(
+            filepath_or_fp=out_file,
+            mimetype="application/zip",
+            as_attachment=True,
+            filename=_("attachments.zip"),
+        )