Fix HTTP not handling relative reidrects correctly

lib/frenzy/http.ex

@@ -2,7 +2,6 @@ defmodule Frenzy.HTTP do
   require Logger
   @redirect_codes [301, 302]
 
-  # @spec get(url :: String.t()) :: {:ok, HTTPoison.Response.t()} | {:error, String.()}
   def get(url) do
     case HTTPoison.get(url) do
       {:ok, %HTTPoison.Response{status_code: 200} = response} ->
@@ -14,6 +13,16 @@ defmodule Frenzy.HTTP do
         |> Enum.find(fn {name, _value} -> name == "Location" end)
         |> case do
           {"Location", new_url} ->
+            new_url =
+              case URI.parse(new_url) do
+                %URI{host: nil, path: path} ->
+                  # relative path
+                  %URI{URI.parse(url) | path: path} |> URI.to_string()
+
+                uri ->
+                  uri
+              end
+
             Logger.debug("Got 301 redirect from #{url} to #{new_url}")
             get(new_url)
 

lib/frenzy/task/fetch_favicon.ex

@@ -19,6 +19,8 @@ defmodule Frenzy.Task.FetchFavicon do
           %URI{URI.parse(feed.feed_url) | path: nil, query: nil, fragment: nil} |> URI.to_string()
       end
 
+    Logger.debug("Fetching favicon for #{site_url}")
+
     case fetch_favicon_from_webpage(site_url) do
       {:ok, favicon_data} ->
         changeset = Feed.changeset(feed, %{favicon: favicon_data})