Gracefully handle requests with no content type

CHANGELOG.md

@@ -7,6 +7,7 @@
 - Update fiber scheduler to support Ruby 4.1 (#397).
 - Improve blocking mechanism for fibers (#401).
 - Support `unsubscribe` commands in Action Cable.
+- Gracefully handle requests with no content type.
 
 ## [1.28.0] - 2026-09-15
 

lib/rage/params_parser.rb

@@ -13,11 +13,11 @@ def self.prepare(env, url_params)
       end
     end
 
-    request_params = if content_type.start_with?("application/json")
+    request_params = if content_type&.start_with?("application/json")
       json_parse(env["rack.input"].tap { |io| io.rewind }.read)
-    elsif content_type.start_with?("application/x-www-form-urlencoded")
+    elsif content_type&.start_with?("application/x-www-form-urlencoded") || content_type.nil?
       Iodine::Rack::Utils.parse_urlencoded_nested_query(env["rack.input"].tap { |io| io.rewind }.read)
-    elsif content_type.start_with?("multipart/form-data")
+    elsif content_type&.start_with?("multipart/form-data")
       Iodine::Rack::Utils.parse_multipart(env["rack.input"], content_type)
     end
 

lib/rage/request.rb

@@ -223,6 +223,14 @@ def route_uri_pattern
     end
   end
 
+  # Get the request body stream.
+  # @return [IO] the request body stream
+  # @example
+  #   request.body.read # => '{"name":"Rage"}'
+  def body
+    @env["rack.input"].tap(&:rewind)
+  end
+
   private
 
   def rack_request

spec/params_parser_spec.rb

@@ -124,6 +124,15 @@
     end
   end
 
+  context "with no content type" do
+    let(:content_type) { nil }
+    let(:urlencoded_params) { { slug: "SQjG", parent_ids: %w(4 5), valid: "" } }
+
+    it "parses the body as urlencoded params" do
+      expect(subject).to equal(urlencoded_params)
+    end
+  end
+
   context "with malformed urlencoded body" do
     let(:urlencoded_params) { { test: true } }
 

spec/rage/request_spec.rb

@@ -1,3 +1,7 @@
+# frozen_string_literal: true
+
+require "stringio"
+
 RSpec.describe Rage::Request do
   let(:env) do
     {
@@ -270,6 +274,24 @@
     expect(request.format).to eq("application/json")
   end
 
+  describe "#body" do
+    let(:rack_input) { StringIO.new('{"name":"Rage"}') }
+
+    before do
+      env["rack.input"] = rack_input
+    end
+
+    it "returns the Rack request body stream" do
+      expect(request.body).to equal(rack_input)
+    end
+
+    it "rewinds the body before returning it" do
+      rack_input.read
+
+      expect(request.body.read).to eq('{"name":"Rage"}')
+    end
+  end
+
   it "returns the correct request ID" do
     expect(request.request_id).to eq("5zfcwiy09bary01l")
   end