Fix webp support

Dockerfile

@@ -73,9 +73,13 @@ RUN cd /opt && \
     cat /root/ArcheResolver.py >> /opt/loris/loris/resolver.py && \
     mv /root/loris.conf /opt/loris/loris/data/loris.conf && \
     apt-get remove -y python3-chardet && \
+    # patch loris so it accepts all formats supported by the pillow package
+    sed -i -e 's/elif self.src_format in .*/elif self.src_format in Image.registered_extensions():/' loris/img_info.py &&\
     pip3 install . && \
     python3 /opt/loris/bin/setup_directories.py && \
-    mv /root/restrictedAccess.png /opt/loris/restrictedAccess.png
+    # ARCHE-specific stuff
+    mv /root/restrictedAccess.png /opt/loris/restrictedAccess.png && \
+    mkdir /tmp/static && chown www-data:www-data /tmp/static
 
 WORKDIR /opt/loris
 VOLUME  /var/log/loris /var/cache/loris

README.md

@@ -5,11 +5,19 @@ Important files
 * `root/loris.conf`, especially the section with the resolver settings
 * `root/loris-cron` - defines the cache pruning frequency and allowed cache size
 
+## Adjustments made
+
+* Own [resolver](https://github.com/loris-imageserver/loris/blob/development/doc/resolver.md) combining
+  `SimpleFSResolver` serving data from `/tmp/static` with `SimpleHTTPResolver` serving data from
+  ARCHE instances and capable of accessing data from a single selected ARCHE instance locally.
+* Loris configuration tuned to support WEBP and GIF as source formats and WEBP as an output format.
+
 ## Debugging
 
 * Apache/WSGI logs are in `/var/log/loris/`
 * After the deployment sources used by the WSGI module are in `/usr/local/lib/python3.8/dist-packages/loris`.
-  After editing the Apache should be restarted with `supervisorctl restart apache2`
+  * Especially the `loris.conf` is in `/usr/local/lib/python3.8/dist-packages/loris/data/loris.conf`
+  * After editing the Apache should be restarted with `supervisorctl restart apache2`
 * For experimenting with file formats support:
   * create `/tmp/static/` directory owned by the `www-data:www-data` user/group
   * upload images into it

root/loris.conf

@@ -81,7 +81,7 @@ cache_dp = '/var/cache/loris' # rwx
 
 [transforms]
 dither_bitonal_images = False
-target_formats = ['jpg','png','gif','webp', 'gif']
+target_formats = ['jpg','png','gif','webp']
 
     [[png]]
     impl = 'PNG_Transformer'