Content-Length must be a String

2 files changed, 8 insertions, 8 deletions

diff --git a/lib/zero/response.rb b/lib/zero/response.rb
index 373a65b..24c1aaf 100644
--- a/lib/zero/response.rb
+++ b/lib/zero/response.rb
@@ -55,7 +55,7 @@ module Zero
     # Also creates one, if it does not exists
     #
     def content_length
-      self.header['Content-Length'] = body.join.bytesize
+      self.header['Content-Length'] = body.join.bytesize.to_s
     end
 
     # Sets the content type header to the given value
diff --git a/spec/unit/response/response_spec.rb b/spec/unit/response/response_spec.rb
index 59358c0..9d2097a 100644
--- a/spec/unit/response/response_spec.rb
+++ b/spec/unit/response/response_spec.rb
@@ -22,15 +22,15 @@ describe Zero::Response do
       subject.body = ['foobar']
       value = subject.to_a
 
-      value[1]['Content-Length'].should eq(6)  # Headers
+      value[1]['Content-Length'].should eq('6')  # Headers
     end
 
     it "does not fix the Content-Length, if it's already set" do
       subject.body = ['foobar']
-      subject.header = {'Content-Length' => 3}
+      subject.header = {'Content-Length' => '3'}
       value = subject.to_a
 
-      value[1]['Content-Length'].should eq(3)  # Headers
+      value[1]['Content-Length'].should eq('3')  # Headers
     end
 
     it "returns the Content-Type in the header" do
@@ -96,24 +96,24 @@ describe Zero::Response do
   end
 
   describe '#content_length' do
-    it "sets the Content-Length to 0, if there is no content" do
+    it "sets the Content-Length to '0', if there is no content" do
       subject.content_length
 
-      subject.header['Content-Length'].should eq(0)
+      subject.header['Content-Length'].should eq('0')
     end
 
     it "sets the Content-Length to the size of the message body" do
       subject.body = ['foo', 'bar']
       subject.content_length
 
-      subject.header['Content-Length'].should eq(6)
+      subject.header['Content-Length'].should eq('6')
     end
 
      it "sets the Content-Length to the bytesize of the message body" do
       subject.body = ['föö', 'bär']
       subject.content_length
 
-      subject.header['Content-Length'].should eq(9)
+      subject.header['Content-Length'].should eq('9')
     end
   end