Davrods - An Apache WebDAV interface to iRODS
Davrods provides access to iRODS servers using the WebDAV protocol. It is a bridge between the WebDAV protocol and the iRODS API, implemented as an Apache HTTPD module.
Davrods leverages the Apache server implementation of the WebDAV
mod_dav, for compliance with the WebDAV Class 2 standard.
Notable features include:
- Supports WebDAV Class 2. Locks are local to the Apache server.
- Supports PAM and Native (a.k.a. STANDARD) iRODS authentication.
- Supports SSL encryption for the entire iRODS connection.
- Easy to configure using Apache configuration directives.
- Supports an anonymous access mode for password-less public access.
- Supports themeable directory listings for read-only web browser access.
- Supports partial file up- and downloads and resumes (HTTP byte-ranges)
- Supports iRODS server versions 4+ and is backwards compatible with 3.3.1.
Themeable listings and anonymous access were inspired by Simon Tyrrell's work at Earlham Institute.
Please choose the right version for your platform:
- If you run Davrods on the same server as your iRODS service, you need a Davrods version built against the same version iRODS runtime.
- If you run Davrods separately, on its own server, then the iRODS runtime version does not matter - just pick the newest Davrods you can get. All Davrods packages below should be compatible with any iRODS 4.x server version.
|Davrods ver.||iRODS runtime ver.||Packages|
If you require a certain Davrods/iRODS runtime version combination that is not listed above, you can most likely still build it yourself (see "Building from source").
A log describing which features were added and which bugs were fixed in each version can be found in changelog.txt.
We currently distribute RPM packages for CentOS 7 & RHEL systems and DEB packages for Debian & Ubuntu systems. We test our packages on CentOS 7 and (as of Davrods 1.4.0) Ubuntu 16.04.
This section describes the installation steps for iRODS 4.2+ based Davrods releases.
To view instructions for iRODS 4.1-based Davrods releases, switch to the
Using the binary distribution
Davrods depends on certain iRODS packages, which as of iRODS 4.2 are distributed at https://packages.irods.org/
After following the instructions for adding the iRODS repository to your package manager at the link above, Davrods can be installed as a binary package using the RPM or DEB file from the releases page (use the table near the top of this README to select the right version).
Download the Davrods package for your platform and install it using your package manager, for example:
yum install davrods-4.2.4_1.4.2-1.rpm --or-- apt install davrods-4.2.4_1.4.2.deb
Now see the Configuration section for instructions on how to configure Davrods once it has been installed.
Davrods and SELinux
If the machine on which you install Davrods is protected by SELinux, you may need to make changes to your policies to allow Davrods to run:
- Apache HTTPD must be allowed to connect to TCP port 1247
For example, the following command can be used to resolve this requirement:
setsebool -P httpd_can_network_connect true
Davrods is configured in two locations: In a HTTPD vhost configuration file and in an iRODS environment file. The vhost config is the main configuration file, the iRODS environment file is used for iRODS client library configuration, similar to the configuration of icommands.
HTTPD vhost configuration
The Davrods RPM distribution installs two vhost template files:
(for Ubuntu, replace
These files are provided completely commented out. To enable either
configuration, simply remove the first column of
# signs, and then
tune the settings to your needs.
Note that on Ubuntu, you will additionally need to enable the Davrods module and vhosts, like so:
a2enmod davrods a2ensite davrods_vhost a2ensite davrods_anonymous_vhost
The normal vhost configuration (1) provides sane defaults for authenticated access.
The anonymous vhost configuration (2) allows password-less public
access using the
anonymous iRODS account.
You can enable both configurations simultaneously, as long as their
ServerName values are unique (for example, you might use
dav.example.com for authenticated access and
public.dav.example.com for anonymous access).
The iRODS environment file
The binary distribution installs the
irods_environment.json file in
/etc/httpd/irods. In most iRODS setups, this file can be used as
Importantly, the first seven options (from
irods_host up to and
irods_zone_name) are not read from this file. These
settings are taken from their equivalent Davrods configuration
directives in the vhost file instead.
The options in the provided environment file starting from
irods_client_server_negotiation do affect the behaviour of
Davrods. See the official documentation for help on these settings at:
For instance, if you want Davrods to connect to iRODS 3.3.1, the
irods_client_server_negotiation option must be set to
Building from source
To build from source, the following build-time dependencies must be installed (package names may differ on your platform):
httpd-devel >= 2.4
irods-devel >= 4.2.0
irods-runtime >= 4.2.0
rpmdevtools(if you are creating an RPM)
Additionally, the following runtime dependencies must be installed:
irods-runtime >= 4.2.0
httpd >= 2.4
Follow these instructions to build from source:
First, browse to the directory where you have unpacked the Davrods source distribution.
Check whether your umask is set to a sane value. If the output of
umask 0022to fix it. This is important for avoiding conflicts in created packages later on.
Create and generate a build directory.
mkdir build cd build cmake ..
- Compile the project
Now you can either build an RPM/DEB or install the project without a package manager.
To create a package:
That's it, you should now have an RPM or DEB in your build directory which you can install using yum or apt.
To install without a package manager on CentOS:
Run the following as user root:
make install chown apache:apache /var/lib/davrods chmod 700 /var/lib/davrods
To install without a package manager on Debian:
Run the following as user root:
make install chown www-data:www-data /var/lib/davrods chmod 700 /var/lib/davrods
To install without a package manager on other distros:
Linux distributions other than RHEL, Debian and their derivatives may have different HTTPD configuration and directory layouts, which are not currently supported by the build system. For this reason you will need to install the files manually on such Linux distributions:
mod_davrods.soto your Apache module directory.
davrods.confto your Apache module configuration/load directory.
davrods-anonymous-vhost.confto your Apache vhost configuration directory.
- Create an
irodsdirectory in a location where Apache HTTPD has read access.
- Create directory
/var/lib/davrods, and give apache exclusive access to it.
Bugs and ToDos
Please report any issues you encounter on the issues page.
For questions or support, contact Chris Smeele or Ton Smeele either directly or via the Utrecht University RDM page.
Copyright (c) 2016 - 2018, Utrecht University.
Davrods is licensed under the GNU Lesser General Public License version 3 or higher (LGPLv3+). See the COPYING.LESSER file for details.
byterange.c files were adapted from components
of Apache HTTPD, and are used with permission granted by the Apache
License. See the copyright and license notices in these files for