Integrate NextCloud for Apache Airavata's Data Transfer Use Cases

The goal of this project is to design and implement a Nextcloud module and replace the existing transfer of the files from the client applications via Hypertext Transfer Protocol (HTTP) and Secure File Transfer Protocol (SFTP) with the APIs of this module. The existing protocols to transfer the uploaded files via client application window differ from each other and run in different ways to establish the connection and transfer the files. The existing mechanisms involve the HTTP and SFTP in order to transfer the files from the client window. To effectively enable the unified mechanism and collaboration of the files with the quick and reliable way we plan to implement the file upload using Nextcloud API. The APIs of the Nextcloud will be targeted in order to transfer the files from the client window and save the files to the Nextcloud. The Nextcloud enables the developers to reliably establish and support an unified mechanism to transfer the files from different clients running on the different platforms.