Image Inspector can extract docker images to a target directory and (optionally) serve the content through webdav.
$ ./image-inspector --image=fedora:22 --serve 0.0.0.0:8080
2015/12/10 19:24:44 Image fedora:22 is available, skipping image pull
2015/12/10 19:24:44 Extracting image fedora:22 to
/var/tmp/image-inspector-121627917
2015/12/10 19:24:46 Serving image content
/var/tmp/image-inspector-121627917 on
webdav://0.0.0.0:8080/api/v1/content/
$ cadaver http://localhost:8080/api/v1/content
dav:/api/v1/content/> ls
Listing collection `/api/v1/content/': succeeded.
Coll: boot 4096 Dec 10 20:24
Coll: dev 4096 Dec 10 20:24
Coll: etc 4096 Dec 10 20:24
Coll: home 4096 Dec 10 20:24
Coll: lost+found 4096 Dec 10 20:24
...
Image Inspector can inspect images using OpenSCAP and serve the scan result. The OpenSCAP scan report will be served on <serve_path>/api/v1/openscap and the status of the scan will be available on <serve_path>/api/v1/metadata in the OpenSCAP section.
$ sudo ./image-inspector --image=fedora:22 --path=/tmp/image-content --scan-type=openscap
--serve 0.0.0.0:8080 --chroot
2016/05/25 16:12:04 Image fedora:22 is available, skipping image pull
2016/05/25 16:12:04 Extracting image fedora:22 to /tmp/image-content
2016/05/25 16:12:14 OpenSCAP scanning /tmp/image-content. Placing results in /var/tmp/image-inspector-scan-results-845509636
2016/05/25 16:12:20 Serving image content /tmp/image-content on webdav://0.0.0.0:8080/api/v1/content/
To build image-inspector using godep:
$ godep go build
$ docker run -ti --rm --privileged -p 8080:8080 \
-v /var/run/docker.sock:/var/run/docker.sock \
openshift/image-inspector --image=fedora:20 \
--path=/tmp/image-content --serve 0.0.0.0:8080