Fixed "Misused header name"

Author: jaaufauvre

Mastercard.Developer.ClientEncryption.RestSharp/Interceptors/RestSharpFieldLevelEncryptionInterceptor.cs

@@ -115,7 +115,6 @@ public void InterceptResponse(IRestResponse response)
                 // Update body and content length
                 var contentTypeInfo = response.GetType().GetTypeInfo().GetDeclaredField("_content");
                 contentTypeInfo.SetValue(response, new Lazy<string>(() => decryptedPayload));
-                UpdateResponseHeader(response, "Content-Length", decryptedPayload.Length.ToString());
             }
             catch (EncryptionException)
             {
@@ -138,18 +137,6 @@ private static void UpdateRequestHeader(IRestRequest request, string name, objec
             request.AddOrUpdateHeader(name, value);
         }
 
-        private static void UpdateResponseHeader(IRestResponse response, string name, string value)
-        {
-            if (string.IsNullOrEmpty(name))
-            {
-                // Do nothing
-                return;
-            }
-
-            response.Headers.Remove(name);
-            response.Headers.Add(name, value);
-        }
-
         private static string ReadAndRemoveHeader(IRestResponse response, string name)
         {
             if (string.IsNullOrEmpty(name) || !response.Headers.Contains(name))

Mastercard.Developer.ClientEncryption.Tests/Interceptors/RestSharpFieldLevelEncryptionInterceptorTest.cs

@@ -100,7 +100,7 @@ public void TestInterceptRequest_ShouldThrowEncryptionException_WhenEncryptionFa
         }
 
         [TestMethod]
-        public void TestInterceptResponse_ShouldDecryptResponsePayloadAndUpdateContentLengthHeader()
+        public void TestInterceptResponse_ShouldDecryptResponsePayload()
         {
             // GIVEN
             const string encryptedPayload = "{" +
@@ -127,7 +127,6 @@ public void TestInterceptResponse_ShouldDecryptResponsePayloadAndUpdateContentLe
             // THEN
             var payload = response.Content;
             TestUtils.AssertPayloadEquals("{\"data\":\"string\"}", payload);
-            Assert.AreEqual(payload.Length.ToString(), response.Headers.GetValue("Content-Length"));
         }
 
         [TestMethod]
@@ -258,7 +257,6 @@ public void TestInterceptRequest_ShouldDecryptResponsePayloadAndRemoveEncryption
             // THEN
             var payload = response.Content;
             TestUtils.AssertPayloadEquals("{\"data\":\"string\"}", payload);
-            Assert.AreEqual(payload.Length.ToString(), response.Headers.GetValue("Content-Length"));
             Assert.IsNull(response.Headers.GetValue("x-iv"));
             Assert.IsNull(response.Headers.GetValue("x-encrypted-key"));
             Assert.IsNull(response.Headers.GetValue("x-oaep-padding-digest-algorithm"));