lib/feed_parser.ex

@@ -23,13 +23,7 @@ defmodule FeedParser do
   """
   @spec parse(data :: String.t(), content_type :: String.t(), parsers :: [module()]) ::
           {:ok, feed :: FeedParser.Feed.t()} | {:error, reason :: String.t()}
-  def parse(data, content_type, parsers \\ @default_parsers)
-
-  def parse(nil, _, _) do
-    {:error, "no data"}
-  end
-
-  def parse(data, content_type, parsers) when is_binary(data) do
+  def parse(data, content_type, parsers \\ @default_parsers) when is_binary(data) do
     parsers
     |> Enum.reduce_while(false, fn parser, acc ->
       case parser.accepts(data, content_type) do

lib/parser/atom.ex

@@ -12,22 +12,15 @@ defmodule FeedParser.Parser.Atom do
   def accepts(data, content_type) do
     case content_type do
       "application/atom+xml" ->
-        case XML.parse(data) do
-          {:error, _} -> false
-          {:ok, doc} -> {true, doc}
-        end
+        {true, XML.parse(data)}
 
       _ when content_type in ["text/xml", "application/xml"] ->
-        case XML.parse(data) do
-          {:error, _} ->
-            false
+        doc = XML.parse(data)
 
-          {:ok, doc} ->
-            if XML.xmlElement(doc, :name) == :feed do
-              {true, doc}
-            else
-              false
-            end
+        if XML.xmlElement(doc, :name) == :feed do
+          {true, doc}
+        else
+          false
         end
 
       _ ->

lib/parser/rss2.ex

@@ -12,22 +12,15 @@ defmodule FeedParser.Parser.RSS2 do
   def accepts(data, content_type) do
     cond do
       content_type in ["application/rss+xml", "text/rss+xml"] ->
-        case XML.parse(data) do
-          {:error, _} -> false
-          {:ok, doc} -> {true, doc}
-        end
+        {true, XML.parse(data)}
 
       content_type in ["text/xml", "application/xml"] ->
-        case XML.parse(data) do
-          {:error, _} ->
-            false
+        doc = XML.parse(data)
 
-          {:ok, doc} ->
-            if XML.xmlElement(doc, :name) == :rss do
-              {true, doc}
-            else
-              false
-            end
+        if XML.xmlElement(doc, :name) == :rss do
+          {true, doc}
+        else
+          false
         end
 
       true ->

lib/xml.ex

@@ -9,16 +9,12 @@ defmodule FeedParser.XML do
   defrecord :xmlAttribute, extract(:xmlAttribute, from_lib: "xmerl/include/xmerl.hrl")
   defrecord :xmlText, extract(:xmlText, from_lib: "xmerl/include/xmerl.hrl")
 
-  @spec parse(data :: String.t()) :: {:ok, tuple()} | {:error, String.t()}
+  @spec parse(data :: String.t()) :: tuple()
   def parse(data) do
     {doc, _} =
-      try do
-        data
-        |> :binary.bin_to_list()
-        |> :xmerl_scan.string()
-      catch
-        :exit, reason -> {:error, "parsing XML failed: #{inspect(reason)}"}
-      end
+      data
+      |> :binary.bin_to_list()
+      |> :xmerl_scan.string()
 
     doc
   end