Add webp support

README.md

@@ -9,6 +9,8 @@ Prism is an image transformation proxy for AWS S3. The source image is determine
 ![Prism Flow Diagram](flow.png)
 
 ### Example request:
+http://prism-dev.tryprism.com -> This is the live server domain.
+
 URL: `https://prism-dev.tryprism.com/images/test-1.jpg?h=200`  
 Image file: `images/test-1.jpg`  
 Parameters: `h=200`
@@ -113,9 +115,17 @@ The TEST_IMAGE setting is used to provide an image to be used for the test and h
 
 ### uWSGI Configuration
 
-The Prism app runs under uWSGI. By default it runs with 2 processes and 2 threads per process. These settings can be overridden using the UWSGI_PROCESSES and UWSGI_THREADS environment variables. Similarly other options can be passed to uWSGI using UWSGI_* environment variables.
+The Prism app runs under uWSGI. By default, it runs with 2 processes and 2 threads per process. These settings can be overridden using the UWSGI_PROCESSES and UWSGI_THREADS environment variables. Similarly, other options can be passed to uWSGI using UWSGI_* environment variables.
 
 
 ## Deployment
 The Docker container runs a uwsgi process with a HTTP socket (port 8000) and a uwsgi socket (port 3001). For local development and testing connecting to the HTTP server is sufficient. For production use it is recommended to use Nginx in front of uwsgi. A sample Nginx configuration including caching setup is included here: [nginx-sample.conf](nginx-sample.conf)
 
+To run docker container use following command:
+
+`docker-compose -f docker-compose.yml -f docker-compose.development.yml up`
+
+The `8000` port of the container is mapped to the `8001` port of the host. Use `localhost:8001` to access the app.
+
+`http://localhost:8001/test`. This test url runs the same command both on your local and the live Prism server, and provides comparisons between local and live prism server image resizing operations. 
+

prism/app.py

@@ -64,7 +64,7 @@ def get_customer(self, request):
     def main(self, request):
         path = request.path[1:]
         _, extension = os.path.splitext(path.lower())
-        if extension not in ('.png', '.jpg', '.jpeg', '.gif'):
+        if extension not in ('.png', '.jpg', '.jpeg', '.gif', '.webp'):
             raise NotFound()
         try:
             args = parse_args(path, request)
@@ -152,19 +152,18 @@ def info(path, args, customer):
     return json_response(info)
 
 
-def fetch_image(args, original_url, exists):
-    if args['with_info'] or args['force'] or not exists:
-        try:
-            return core.fetch_image(original_url)
-        except HTTPError as e:
-            if e.response.status_code in (404, 403):
-                raise NotFound()
-            else:
-                raise
-        except core.EmptyOriginalFile as e:
-            raise BadRequest(e.message)
-        except core.InvalidImageError as e:
-            raise BadRequest(e.message)
+def fetch_image(original_url):
+    try:
+        return core.fetch_image(original_url)
+    except HTTPError as e:
+        if e.response.status_code in (404, 403):
+            raise NotFound()
+        else:
+            raise
+    except core.EmptyOriginalFile as e:
+        raise BadRequest(e.message)
+    except core.InvalidImageError as e:
+        raise BadRequest(e.message)
 
 
 def process(path, args, customer):
@@ -181,7 +180,7 @@ def process(path, args, customer):
     exists = core.check_s3_object_exists(result_url)
     if args['with_info'] or args['force'] or not exists:
         clear_old_tmp_files()
-        im = fetch_image(args=args, original_url=original_url, exists=exists)
+        im = fetch_image(original_url=original_url)
         f = core.resize(im.clone(), cmd, options)
         bucket = dict(
             id=customer.write_bucket_name,

prism/core.py

@@ -161,7 +161,7 @@ def check_s3_object_exists(url):
 
 def upload_file(bucket_dict, file, new_filename):
     """
-    uploads file to s3 bucket under prism-thumbnails folder
+    uploads file to s3 bucket under prism-images folder
     """
 
     logger.info("bucket_key_id: %s", bucket_dict['key_id'])

prism/static/test.html

@@ -24,7 +24,7 @@
         'cmd=resize&w=100',
         'cmd=resize&h=100',
         'cmd=resize&w=100&h=100',
-        
+
         'cmd=resize&w=100&h=100&preserve_ratio=1',
         'cmd=resize&w=100&h=100&preserve_ratio=0',
 
@@ -56,6 +56,7 @@
     var images = [
         '/images/test-1.jpg',
         '/images/test-bs.png',
+        '/images/hippo.webp',
     ]
 
     var urls = [];