davfs2 software package provides mount a WebDAV resource as a regular file system, you can install in your Debian 9 (Stretch) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install davfs2
davfs2 is installed in your system.
Make ensure the davfs2 package were installed using the commands given below,
$ sudo dpkg-query -l | grep davfs2 *
You will get with davfs2 package name, version, architecture and description in a table
| Distro | Debian 9 stretch |
| Section | Utilities |
| Package | davfs2 |
| Version | 1.5.4-2 |
| Description | mount a WebDAV resource as a regular file system |
| Sub Section | Utils |