/// <summary>
/// Responsible for processing all HTTP GET requests in to the femah API. Receives an ApiRequest object, orchestrates and hands off to
/// the ApiResponseBuilder class to create the ApiResponse object.
/// </summary>
/// <param name="apiRequest" type="ApiRequest">A custom request object built predominantly from the http context request object, contains everything we need to route the API request appropriately.</param>
/// <returns type="ApiResponse">The complete response to the GET request from the API, including body and HTTP status code.</returns>
public static ApiResponse ProcessGetRequest(ApiRequest apiRequest)
{
using (var apiResponseBuilder = new ApiResponseBuilder())
{
//Example GET: http://example.com/femah.axd/api/featureswitches - Lists all Feature Switches FeatureSwitching.AllFeatures()
//Example GET: http://example.com/femah.axd/api/featureswitches/improvedcheckout - Retrieve the Feature Switch ImprovedCheckout
//Example GET: http://example.com/femah.axd/api/featureswitchtypes - Lists all Feature Switch Types FeatureSwitching.AllSwitchTypes()
ApiResponse response;
switch (apiRequest.Service)
{
case ApiRequest.ApiService.featureswitches:
if (string.IsNullOrEmpty(apiRequest.Parameter))
response = apiResponseBuilder.CreateWithFeatureSwitches(Femah.AllFeatures());
else
{
var featureSwitch = Femah.GetFeature(apiRequest.Parameter);
if (featureSwitch != null)
{
response = apiResponseBuilder.CreateWithFeatureSwitches(featureSwitch);
break;
}
response = apiResponseBuilder.WithBody(String.Empty).WithHttpStatusCode(HttpStatusCode.NotFound);
}
break;
case ApiRequest.ApiService.featureswitchtypes:
if (!string.IsNullOrEmpty(apiRequest.Parameter))
{
response = apiResponseBuilder.WithBody(
String.Format("Error: Service '{0}' does not support parameter querying.", apiRequest.Service))
.WithHttpStatusCode(HttpStatusCode.MethodNotAllowed);
break;
}
response = apiResponseBuilder.CreateWithFeatureSwitchTypes(Femah.AllSwitchTypes());
break;
default:
response = apiResponseBuilder.WithBody(
String.Format("Error: '{0}' is not a valid Femah API service.", apiRequest.Service))
.WithHttpStatusCode(HttpStatusCode.MethodNotAllowed);
break;
}
return response;
}
}
/// <summary>
/// Responsible for processing all HTTP PUT requests in to the femah API. Receives an ApiRequest object, orchestrates and hands off to
/// the ApiResponseBuilder class to create the ApiResponse object.
/// </summary>
/// <param name="apiRequest" type="ApiRequest">A custom request object built predominantly from the http context request object, contains everything we need to route the API request appropriately.</param>
/// <returns type="ApiResponse">The complete response to the PUT request from the API, including body and HTTP status code.</returns>
public static ApiResponse ProcessPutRequest(ApiRequest apiRequest)
{
using (var apiResponseBuilder = new ApiResponseBuilder())
{
ApiResponse response = null;
if (String.IsNullOrEmpty(apiRequest.Parameter))
{
response = apiResponseBuilder.WithBody(
String.Format("Error: Service '{0}' requires a parameter to be passed. Url must match the format /femah.axd/api/[service]/[parameter].", apiRequest.Service))
.WithHttpStatusCode(HttpStatusCode.MethodNotAllowed);
return response;
}
switch (apiRequest.Service)
{
//Example PUT: http://example.com/femah.axd/api/featureswitches/TestFeatureSwitch1 - Update a single Feature Switch (IsEnabled, SetCustomAttributes, FeatureType)
case ApiRequest.ApiService.featureswitches:
var featureSwitch = DeSerialiseJsonBodyToFeatureSwitch(apiRequest.Body);
if (featureSwitch != null)
response = apiResponseBuilder.CreateWithUpdatedFeatureSwitch(featureSwitch);
else
{
response = apiResponseBuilder.WithBody("Error: Unable to deserialise the request body. Either the JSON is invalid or the supplied 'FeatureType' value is incorrect, have you used the AssemblyQualifiedName as the 'FeatureType' in the request?")
.WithHttpStatusCode(HttpStatusCode.BadRequest);
}
break;
default:
response = apiResponseBuilder.WithBody(
String.Format("Error: Service '{0}' does not support parameter querying.", apiRequest.Service))
.WithHttpStatusCode(HttpStatusCode.MethodNotAllowed);
break;
}
return response;
}
}
public void ProcessPutRequestSetsHttpStatusCodeTo400AndReturnsGenericErrorMessageInResponseBodyIfPutRequestBodyContainsAJsonArrayOfFeatureSwitches()
{
//Arrange
const string validFeatureType = "Femah.Core.FeatureSwitchTypes.SimpleFeatureSwitch, Femah.Core, Version=0.1.0.0, Culture=neutral, PublicKeyToken=null";
var apiRequest = new ApiRequest
{
HttpMethod = "PUT",
Service = ApiRequest.ApiService.featureswitches,
Parameter = "TestFeatureSwitch",
Body = string.Format("{{\"IsEnabled\":true,\"Name\":\"TestFeatureSwitch1\",\"FeatureType\":\"{0}\",\"Description\":\"Define a short description of the feature switch type here.\",\"ConfigurationInstructions\":\"Add configuration context and instructions to be displayed in the admin UI\"}},{{\"IsEnabled\":true,\"Name\":\"TestFeatureSwitch2\",\"FeatureType\":\"{0}\",\"Description\":\"Define a short description of the feature switch type here.\",\"ConfigurationInstructions\":\"Add configuration context and instructions to be displayed in the admin UI\"}}", validFeatureType)
};
//TODO: I'd like this to be a more specific error with regards to formatting
const string expectedJsonBody = "\"Error: Unable to deserialise the request body. Either the JSON is invalid or the supplied 'FeatureType' value is incorrect, have you used the AssemblyQualifiedName as the 'FeatureType' in the request?\"";
//Act
ApiResponse apiResponse = ProcessApiRequest.ProcessPutRequest(apiRequest);
//Assert
Assert.AreEqual((int)HttpStatusCode.BadRequest, apiResponse.HttpStatusCode);
Assert.AreEqual(expectedJsonBody, apiResponse.Body);
}
public void ProcessPutRequestSetsHttpStatusCodeTo304IfPutRequestBodyIsValidJsonButFeatureSwitchHasNoChanges()
{
//Arrange
const string validFeatureType = "Femah.Core.FeatureSwitchTypes.SimpleFeatureSwitch, Femah.Core, Version=0.1.0.0, Culture=neutral, PublicKeyToken=null";
string jsonRequestAndResponse = string.Format(
"{{\"IsEnabled\":true,\"Name\":\"TestFeatureSwitch1\",\"FeatureType\":\"{0}\",\"Description\":\"Define a short description of the feature switch type here.\",\"ConfigurationInstructions\":\"Add configuration context and instructions to be displayed in the admin UI\"}}",
validFeatureType);
var apiRequest = new ApiRequest
{
HttpMethod = "PUT",
Service = ApiRequest.ApiService.featureswitches,
Parameter = "TestFeatureSwitch",
Body = jsonRequestAndResponse
};
var featureSwitch = new SimpleFeatureSwitch
{
Name = "TestFeatureSwitch1",
IsEnabled = true,
FeatureType = validFeatureType
};
var providerMock = new Mock<IFeatureSwitchProvider>();
providerMock.Setup(p => p.Get("TestFeatureSwitch1"))
.Returns(featureSwitch);
Femah.Configure()
.FeatureSwitchEnum(typeof(FeatureSwitches))
.Provider(providerMock.Object)
.Initialise();
//Act
ApiResponse apiResponse = ProcessApiRequest.ProcessPutRequest(apiRequest);
//Assert
Assert.AreEqual((int)HttpStatusCode.NotModified, apiResponse.HttpStatusCode);
Assert.AreEqual(string.Empty, apiResponse.Body);
}
public PutApiRequestFactory ForServiceType(ApiRequest.ApiService service)
{
_service = service;
return this;
}
public ApiRequest Build(HttpRequestBase request)
{
var apiRequest = new ApiRequest();
if (request.HttpMethod == "PUT" && request.ContentType != "application/json")
{
apiRequest.ErrorMessage = string.Format("Error: Content-Type '{0}' of request is not supported, expecting 'application/json'.", request.ContentType);
apiRequest.ErrorMessageHttpStatusCode = HttpStatusCode.UnsupportedMediaType;
return apiRequest;
}
if (request.Url == null)
{
apiRequest.ErrorMessage = string.Format("Error: The requested Url '{0}' is null.", request.Url);
apiRequest.ErrorMessageHttpStatusCode = HttpStatusCode.InternalServerError;
return apiRequest;
}
var uriSegments = request.Url.Segments;
try
{
apiRequest.HttpMethod = request.HttpMethod;
//If we have a request body then retrieve it from the InputStream.
if (request.InputStream != null)
{
string requestBody;
using (var stream = new MemoryStream())
{
request.InputStream.Seek(0, SeekOrigin.Begin);
request.InputStream.CopyTo(stream);
requestBody = Encoding.UTF8.GetString(stream.ToArray());
}
apiRequest.Body = requestBody;
}
if (uriSegments.Count() < 4 || uriSegments.Count()> 5)
{
apiRequest.ErrorMessage = string.Format("Error: The requested Url '{0}' does not match the expected format /femah.axd/api/[service]/[parameter].", request.Url);
apiRequest.ErrorMessageHttpStatusCode = HttpStatusCode.InternalServerError;
return apiRequest;
}
//Retrieve the service passed in on the Url, service is mandatory.
string service = uriSegments[3].ToLower().Replace("/", "");
ApiRequest.ApiService apiService;
if (EnumExtensions.TryParse(service, out apiService))
{
if (Enum.IsDefined(typeof (ApiRequest.ApiService), apiService))
apiRequest.Service = apiService;
}
else
{
apiRequest.Service = null;
}
if (uriSegments.Count() == 5)
{
//Retrieve the optional parameter of the service passed in on the Url, this is optional so handle this a little better.
string member = uriSegments[4].ToLower().Replace("/", "");
apiRequest.Parameter = member;
}
}
catch (IndexOutOfRangeException)
{
apiRequest.ErrorMessage = string.Format("Error: The requested Url '{0}' does not match the expected format /femah.axd/api/[service]/[parameter].", request.Url);
apiRequest.ErrorMessageHttpStatusCode = HttpStatusCode.InternalServerError;
}
return apiRequest;
}
