Adds a URL transform method for overridding

README.md

@@ -6,3 +6,8 @@ The following comics are nativly supported:
 * XKCD
 * Existential Comics
 * Bluesky
+
+# Installing
+This project requires the following dependencies:
+
+* `libraqm`

src/comic_download/comic_strip.py

@@ -330,6 +330,17 @@ class ImageRepo(ABC):
 
         self.download_data()
 
+    def transform_download_url(self, result):
+        """
+        If we need to run extra operations on a request (i.e. a redirect), we
+        can override this method to handle that before we attempt to extract
+        image data. If not overridden, this simply returns the original result.
+
+        :param result: The original request result.
+        :returns: The new request result to use.
+        """
+        return result
+
     def _download_data(self):
         """
         Downloads all images and saves them to temporary files in the #images field.
@@ -349,6 +360,8 @@ class ImageRepo(ABC):
                 image_path = NamedTemporaryFile(mode='wb', suffix=str(name), prefix=self.get_identifier_string(), delete = False)
                 result = requests.get(self.image_urls[name], headers=self.download_headers)
                 result.raise_for_status()
+                # Handles necessary transformations for a URL (i.e., redirections)
+                result = self.transform_download_url(result)
                 image_path.write(result.content)
                 image_path.close()
                 if type(self.images) == list: