Remove uploaded data from multipart request body

See #39

features/step_definitions/image_steps.rb

@@ -0,0 +1,8 @@
+Given /^I move the sample image into the workspace$/ do
+  FileUtils.cp("features/fixtures/file.png", current_dir)
+end
+
+Then /^the generated documentation should be encoded correctly$/ do
+  file = File.read(File.join(current_dir, "doc", "api", "foobars", "uploading_a_file.html"))
+  file.should =~ /file\.png/
+end

features/upload_file.feature

@@ -0,0 +1,85 @@
+Feature: Uploading a file
+  Background:
+    Given a file named "app.rb" with:
+      """
+      require 'rack'
+
+      class App
+        def self.call(env)
+          request = Rack::Request.new(env)
+          [200, {}, [request.params["file"][:filename]]]
+        end
+      end
+      """
+
+  Scenario: Uploading a text file
+    Given a file named "file.txt" with:
+      """
+      a file to upload
+      """
+    And   a file named "app_spec.rb" with:
+      """
+      require "rspec_api_documentation"
+      require "rspec_api_documentation/dsl"
+      require "rack/test"
+
+      RspecApiDocumentation.configure do |config|
+        config.app = App
+      end
+
+      resource "FooBars" do
+        post "/foobar" do
+          parameter :name, "Name of file"
+          parameter :file, "File to upload"
+
+          let(:name) { "my-new-file.txt" }
+          let(:file) do
+            Rack::Test::UploadedFile.new("file.txt", "text/plain")
+          end
+
+          example_request "Uploading a file" do
+            response_body.should == "file.txt"
+          end
+        end
+      end
+      """
+
+    When  I run `rspec app_spec.rb --require ./app.rb --format RspecApiDocumentation::ApiFormatter`
+
+    Then  the output should contain "1 example, 0 failures"
+    And   the exit status should be 0
+
+  Scenario: Uploading an image file
+    Given I move the sample image into the workspace
+    And   a file named "app_spec.rb" with:
+      """
+      require "rspec_api_documentation"
+      require "rspec_api_documentation/dsl"
+      require "rack/test"
+
+      RspecApiDocumentation.configure do |config|
+        config.app = App
+      end
+
+      resource "FooBars" do
+        post "/foobar" do
+          parameter :name, "Name of file"
+          parameter :file, "File to upload"
+
+          let(:name) { "my-new-file.txt" }
+          let(:file) do
+            Rack::Test::UploadedFile.new("file.png", "image/png")
+          end
+
+          example_request "Uploading a file" do
+            response_body.should == "file.png"
+          end
+        end
+      end
+      """
+
+    When  I run `rspec app_spec.rb --require ./app.rb --format RspecApiDocumentation::ApiFormatter`
+
+    Then  the output should contain "1 example, 0 failures"
+    And   the exit status should be 0
+    And   the generated documentation should be encoded correctly

lib/rspec_api_documentation/client_base.rb

@@ -49,6 +49,10 @@ def document_example(method, path)
 
       request_metadata = {}
 
+      if request_content_type =~ /multipart\/form-data/ && respond_to?(:handle_multipart_body, true)
+        request_body = handle_multipart_body(request_headers, request_body)
+      end
+
       request_metadata[:request_method] = method
       request_metadata[:request_path] = path
       request_metadata[:request_body] = request_body.empty? ? nil : request_body

lib/rspec_api_documentation/rack_test_client.rb

@@ -42,6 +42,22 @@ def headers(*args)
       headers_to_env(super)
     end
 
+    def handle_multipart_body(request_headers, request_body)
+      parsed_parameters = Rack::Request.new({
+        "CONTENT_TYPE" => request_headers["Content-Type"],
+        "rack.input" => StringIO.new(request_body)
+      }).params
+
+      parsed_parameters.each do |_, value|
+        if value.is_a?(Hash) && value.has_key?(:tempfile)
+          data = value[:tempfile].read
+          request_body = request_body.gsub(data, "[uploaded data]")
+        end
+      end
+
+      request_body
+    end
+
     private
 
     def rack_test_session