private static LazyUri MaybeAddAdditionalQueryParameters(LazyUri url, WebRequestOptions options)
{
bool cloned = false;
if (options != null && options.AdditionalQueryParameters != null)
{
foreach (var item in Flatten(options.AdditionalQueryParameters))
{
if (!cloned)
{
cloned = true;
url = url.Clone();
}
url.AppendQueryParameter(item.Key, ToString(item.Value));
}
}
return(url);
}
internal static async Task <HttpResponseInfo> SendAsync(this LazyUri url, WebRequestOptions options, HttpRequestMessageBox messageBox, bool alwaysCatchAndForbidRedirects = false, bool keepResponseAliveOnError = false, bool synchronous = false)
{
HttpUtils.EnsureInitialized();
if (!synchronous)
{
await Utils.CheckLocalFileAccessAsync(url);
}
Utils.RaiseWebRequestEvent(url, false);
HttpResponseMessage result = null;
LazyUri previousResponse2 = null;
try
{
if (options == WebRequestOptions.DefaultOptions)
{
throw new ArgumentException();
}
if (options.WaitBefore.Ticks != 0 && !synchronous)
{
await TaskEx.Delay(options.WaitBefore);
}
LazyUri previousResponse1 = null;
previousResponse2 = url.Clone();
previousResponse2 = MaybeAddAdditionalQueryParameters(previousResponse2, options);
var redirectIndex = 0;
while (true)
{
#if WEBCLIENT
HttpContent requestContent = null;
#endif
var message = messageBox?.PrebuiltRequest ?? CreateRequestInternal(previousResponse2, options, true, redirectIndex
#if WEBCLIENT
, out requestContent
#endif
);
if (messageBox != null)
{
messageBox.Dispose();
messageBox.Message = message;
}
#if WEBCLIENT
if (requestContent != null)
{
if (requestContent.ContentType != null)
{
message.ContentType = requestContent.ContentType;
}
if (requestContent.ContentDisposition != null)
{
message.Headers["Content-Disposition"] = requestContent.ContentDisposition;
}
using (var req = await message.GetRequestStreamAsync())
{
await requestContent.CopyToAsync(req);
}
}
result = (HttpWebResponse)await message.GetResponseAsync();
#else
message.Properties["ShamanURL"] = url;
if (options.CustomHttpClient != null)
{
result = await options.CustomHttpClient.SendAsync(message, HttpCompletionOption.ResponseHeadersRead);
}
else
{
if (defaultHttpClient == null)
{
defaultHttpClient = CreateHttpClient();
}
result = messageBox?.PrebuiltResponse ?? await defaultHttpClient.SendAsync(message, HttpCompletionOption.ResponseHeadersRead);
}
#endif
#if !WEBCLIENT
if (result.Content != null && result.Content.Headers.ContentType != null && result.Content.Headers.ContentType.CharSet == "utf8")
{
result.Content.Headers.ContentType.CharSet = "utf-8";
}
#endif
if ((int)result.StatusCode >= 400)
{
if (!keepResponseAliveOnError)
{
result.Dispose();
}
// Hackish, change purpose of enumeration type
throw new WebException("The web server returned: " + result.StatusCode.ToString(), (WebExceptionStatus)result.StatusCode);
}
#if WEBCLIENT
var zz = result.Headers["Location"];
var redirectUrlNative = zz != null?HttpUtils.GetAbsoluteUri(url.PathConsistentUrl, zz) : null;
#else
var redirectUrlNative = result.Headers.Location;
#endif
if (redirectUrlNative == null)
{
return(new HttpResponseInfo()
{
RespondingUrl = previousResponse2, Response = result
});
}
else
{
if (alwaysCatchAndForbidRedirects)
{
return new HttpResponseInfo()
{
Response = result, RespondingUrl = previousResponse2, Exception = new WebException("Unexpected redirect", HttpUtils.Error_UnexpectedRedirect)
}
}
;
result.Dispose();
var redirectUrl = new LazyUri(redirectUrlNative);
if (!redirectUrl.IsAbsoluteUri)
{
redirectUrl = new LazyUri(new Uri(previousResponse2.PathConsistentUrl, redirectUrlNative));
}
if (options != null && !options.AllowRedirects)
{
throw new WebException("Unexpected redirect was received.", HttpUtils.Error_UnexpectedRedirect);
}
if (redirectIndex == Configuration_MaximumNumberOfRedirects)
{
throw new WebException("The maximum number of redirects has been reached.", HttpUtils.Error_MaximumNumberOfRedirectsExceeded);
}
if (!(redirectIndex == 0 && options != null && (options.PostData != null || options.PostString != null)))
{
if ((
(previousResponse1 != null && HttpUtils.UrisEqual(redirectUrl.PathAndQueryConsistentUrl, previousResponse1.PathAndQueryConsistentUrl)) ||
HttpUtils.UrisEqual(redirectUrl, previousResponse2)))
{
if (url.GetFragmentParameter("$allow-same-redirect") == "1")
{
if (!synchronous)
{
#if NET35
await TaskEx.Delay(Configuration_SameRedirectDelayTimeMs);
#else
await Task.Delay(Configuration_SameRedirectDelayTimeMs);
#endif
}
}
else
{
throw new WebException("The server isn't redirecting the requested resource properly.", HttpUtils.Error_RedirectLoopDetected);
}
}
}
previousResponse1 = previousResponse2;
previousResponse2 = redirectUrl;
redirectIndex++;
}
}
}
catch (Exception ex)
{
var orig = ex;
#if !WEBCLIENT
var hre = ex as HttpRequestException;
if (hre != null && hre.InnerException != null)
{
ex = hre.InnerException;
}
#endif
if (alwaysCatchAndForbidRedirects)
{
return new HttpResponseInfo()
{
Exception = ex, Response = result, RespondingUrl = previousResponse2
}
}
;
else if (ex == orig)
{
throw;
}
else
{
throw ex.Rethrow();
}
}
}