public void ProcessRequest(HttpContextBase context)
{
context.Response.ContentType = "application/json";
context.Response.ContentEncoding = Encoding.UTF8;
// Great article on verbs to use in API design http://stackoverflow.com/questions/2001773/understanding-rest-verbs-error-codes-and-authentication/2022938#2022938
ApiRequest apiRequest;
using (var apiRequestBuilder = new ApiRequestBuilder())
{
apiRequest = apiRequestBuilder.Build(context.Request);
}
var apiResponse = new ApiResponse();
if (!string.IsNullOrEmpty(apiRequest.ErrorMessage))
{
using (var apiResponseBuilder = new ApiResponseBuilder())
{
apiResponse = apiResponseBuilder.WithBody(
string.Format(apiRequest.ErrorMessage))
.WithHttpStatusCode(apiRequest.ErrorMessageHttpStatusCode);
}
}
else
{
switch (apiRequest.HttpMethod)
{
case "GET":
apiResponse = ProcessApiRequest.ProcessGetRequest(apiRequest);
break;
case "PUT":
apiResponse = ProcessApiRequest.ProcessPutRequest(apiRequest);
break;
}
if (apiResponse == null)
{
using (var apiResponseBuilder = new ApiResponseBuilder())
{
apiResponse = apiResponseBuilder.WithBody(
string.Format("Error: API GET request returned NULL"))
.WithHttpStatusCode(HttpStatusCode.InternalServerError);
}
}
}
context.Response.StatusCode = apiResponse.HttpStatusCode;
context.Response.Write(apiResponse.Body);
}
public void ApiRequestBuilderSetsErrorMessageHttpStatusCodeTo500AndProvidesAccurateErrorMessageIfRequestUrlIsInvalidAndContainsTooManySegments()
{
//Arrange
var testable = new ApiRequestBuilder();
var httpContextMock = new Mock<HttpContextBase>();
httpContextMock.Setup(x => x.Request.Url)
.Returns(new Uri("http://example.com/femah.axd/api/invalid/url/structure"));
httpContextMock.SetupGet(x => x.Request.HttpMethod).Returns("GET");
const string expectedJsonBody = "Error: The requested Url 'http://example.com/femah.axd/api/invalid/url/structure' does not match the expected format /femah.axd/api/[service]/[parameter].";
//Act
ApiRequest apiRequest = testable.Build(httpContextMock.Object.Request);
//Asert
Assert.AreEqual(HttpStatusCode.InternalServerError, apiRequest.ErrorMessageHttpStatusCode);
Assert.AreEqual(expectedJsonBody, apiRequest.ErrorMessage);
}
public void ApiRequestBuilderSetsErrorMessageHttpStatusCodeTo415AndProvidesAccurateErrorMessageIfContentTypeIsNotSetToApplicationJsonAndRequestIsAPut()
{
//Arrange
var testable = new ApiRequestBuilder();
var httpContextMock = new Mock<HttpContextBase>();
httpContextMock.Setup(x => x.Request.Url)
.Returns(new Uri("http://example.com/femah.axd/api/featureswitches/TestFeatureSwitch1"));
httpContextMock.SetupGet(x => x.Request.HttpMethod).Returns("PUT");
httpContextMock.SetupGet(x => x.Request.ContentType).Returns("incorrect/contenttype");
const string expectedJsonBody = "Error: Content-Type 'incorrect/contenttype' of request is not supported, expecting 'application/json'.";
//Act
ApiRequest apiRequest = testable.Build(httpContextMock.Object.Request);
//Asert
Assert.AreEqual(HttpStatusCode.UnsupportedMediaType, apiRequest.ErrorMessageHttpStatusCode);
Assert.AreEqual(expectedJsonBody, apiRequest.ErrorMessage);
}
public void ApiRequestBuilderSetsApiRequestBodyIfHttpContextInputStreamIsNotNull()
{
//Arrange
var testable = new ApiRequestBuilder();
var httpContextMock = new Mock<HttpContextBase>();
httpContextMock.Setup(x => x.Request.Url)
.Returns(new Uri("http://example.com/femah.axd/api/featureswitches"));
httpContextMock.SetupGet(x => x.Request.HttpMethod).Returns("GET");
//Build the request Body in JSON
const string expectedJsonBody = "{\"IsEnabled\":true,\"Name\":\"TestFeatureSwitch1\",\"FeatureType\":\"SimpleFeatureSwitch\",\"Description\":\"Define a short description of the feature switch type here.\",\"ConfigurationInstructions\":\"Add configuration context and instructions to be displayed in the admin UI\"}";
var inputStream = new MemoryStream();
var streamWriter = new StreamWriter(inputStream);
streamWriter.Write(expectedJsonBody);
streamWriter.Flush();
httpContextMock.SetupGet(x => x.Request.InputStream).Returns(inputStream);
//Act
ApiRequest apiRequest = testable.Build(httpContextMock.Object.Request);
//Assert
Assert.AreEqual(expectedJsonBody, apiRequest.Body);
}