/// <summary>
/// Generates the failure.
/// </summary>
/// <param name="request">The request.</param>
/// <param name="ex">The ex.</param>
/// <returns>The generated exception.</returns>
private HttpOutcomeException GenerateFailure(HttpRequestMessage request, Exception ex)
{
HttpResult result;
if (Page == null || Page.Result == null)
{
var outcome = new HttpOutcome(
request.RequestUri,
request.Method,
HttpStatusCode.BadGateway,
string.Empty,
TimeSpan.Zero);
result = new HttpResult(
new[]
{
outcome
});
}
else
{
result = Page.Result;
}
return(new HttpOutcomeException(result, ex));
}
/// <summary>
/// Executes the request internally.
/// </summary>
/// <typeparam name="T">
/// The type of page to return.
/// </typeparam>
/// <param name="request">
/// The request.
/// </param>
/// <param name="expectedStatusCode">
/// The expected status code.
/// </param>
/// <param name="pageFactory">
/// The page factory.
/// </param>
/// <returns>
/// A <typeparamref name="T" /> value.
/// </returns>
/// <exception cref="System.ArgumentNullException">
/// The <paramref name="request" /> parameter is <c>null</c>.
/// </exception>
/// <exception cref="System.ArgumentNullException">
/// The <paramref name="pageFactory" /> parameter is <c>null</c>.
/// </exception>
/// <exception cref="HttpOutcomeException">
/// </exception>
private T ExecuteInternal <T>(
HttpRequestMessage request,
HttpStatusCode expectedStatusCode,
IPageFactory pageFactory) where T : IPage, new()
{
var page = default(T);
if (request == null)
{
throw new ArgumentNullException("request");
}
if (pageFactory == null)
{
throw new ArgumentNullException("pageFactory");
}
request.Headers.Add("user-agent", UserAgent);
var currentResourceLocation = request.RequestUri;
var outcomes = new List <HttpOutcome>();
var stopwatch = Stopwatch.StartNew();
var task = _client.SendAsync(request);
Uri redirectLocation = null;
bool requiresRedirect;
using (var response = task.Result)
{
stopwatch.Stop();
var outcome = new HttpOutcome(
currentResourceLocation,
response.RequestMessage.Method,
response.StatusCode,
response.ReasonPhrase,
stopwatch.Elapsed);
outcomes.Add(outcome);
requiresRedirect = IsRedirect(response);
if (requiresRedirect)
{
redirectLocation = response.Headers.Location;
}
else
{
// This the final response
var result = new HttpResult(outcomes);
page = pageFactory.Create <T>(this, response, result);
}
}
while (requiresRedirect)
{
// Get the redirect address
Uri fullRedirectLocation;
if (redirectLocation.IsAbsoluteUri)
{
fullRedirectLocation = redirectLocation;
}
else
{
fullRedirectLocation = new Uri(currentResourceLocation, redirectLocation);
}
currentResourceLocation = fullRedirectLocation;
stopwatch = Stopwatch.StartNew();
task = _client.GetAsync(currentResourceLocation);
using (var response = task.Result)
{
stopwatch.Stop();
var outcome = new HttpOutcome(
currentResourceLocation,
response.RequestMessage.Method,
response.StatusCode,
response.ReasonPhrase,
stopwatch.Elapsed);
outcomes.Add(outcome);
requiresRedirect = IsRedirect(response);
if (requiresRedirect)
{
redirectLocation = response.Headers.Location;
}
else
{
// This the final response
var result = new HttpResult(outcomes);
page = pageFactory.Create <T>(this, response, result);
}
}
}
SetCurrentPage(page);
var lastOutcome = outcomes[outcomes.Count - 1];
if (lastOutcome.StatusCode != expectedStatusCode)
{
var result = new HttpResult(outcomes);
throw new HttpOutcomeException(result, expectedStatusCode);
}
// Validate that the final address matches the page
if (page.IsOn(currentResourceLocation) == false)
{
var result = new HttpResult(outcomes);
throw new HttpOutcomeException(result, page.TargetLocation);
}
return(page);
}