/// <summary>
/// Asynchronously sends a request to the specified url.
/// </summary>
/// <param name="url">The URL.</param>
/// <param name="param">The request parameters.</param>
/// <param name="accept">The content types to accept.</param>
/// <returns></returns>
public async Task <HttpResponseMessage> SendAsync(Uri url, RequestParams param,
string accept)
{
var newParams = param ?? new RequestParams();
while (true)
{
// Store params
m_url = url;
m_accept = accept;
HttpResponseMessage response = null;
try
{
var request = GetHttpRequest(newParams);
response = await GetHttpResponseAsync(GetHttpClientHandler(), request).
ConfigureAwait(false);
EnsureSuccessStatusCode(response);
}
catch (HttpWebClientServiceException)
{
// Seems pointless but prevents the exception from getting wrapped again
throw;
}
catch (HttpRequestException ex)
{
// Strip a layer of exceptions if a web exception occurred
if (ex.InnerException is WebException)
{
throw HttpWebClientServiceException.HttpWebClientException(url,
ex.InnerException);
}
// Throw default exception if no response
if (response == null)
{
throw HttpWebClientServiceException.Exception(url, ex);
}
// Throw for 404, 500, etc.
if (response.StatusCode != HttpStatusCode.Redirect && response.
StatusCode != HttpStatusCode.MovedPermanently)
{
throw HttpWebClientServiceException.HttpWebClientException(url, ex,
response.StatusCode);
}
}
catch (TaskCanceledException ex)
{
// We throw a request timeout if the task gets cancelled due to the
// timeout setting
throw HttpWebClientServiceException.HttpWebClientException(url,
new HttpRequestException(ex.Message), HttpStatusCode.RequestTimeout);
}
catch (Exception ex)
{
throw HttpWebClientServiceException.Exception(url, ex);
}
if (response.StatusCode != HttpStatusCode.Redirect && response.StatusCode !=
HttpStatusCode.MovedPermanently)
{
return(response);
}
// When the address has been redirected, connects to the redirection
Uri target = response.Headers.Location;
response.Dispose();
if (m_redirectsRemaining-- <= 0)
{
throw HttpWebClientServiceException.RedirectsExceededException(m_url);
}
m_referrer = m_url;
m_url = new Uri(m_url, target);
url = m_url;
}
}
/// <summary>
/// Asynchronously sends a request to the specified url.
/// </summary>
/// <param name="url">The URL.</param>
/// <param name="method">The method.</param>
/// <param name="postData">The post data.</param>
/// <param name="dataCompression">The data compression.</param>
/// <param name="acceptEncoded">if set to <c>true</c> accept encoded response.</param>
/// <param name="accept">The accept.</param>
/// <returns></returns>
public async Task <HttpResponseMessage> SendAsync(Uri url, HttpMethod method, HttpPostData postData,
DataCompression dataCompression,
bool acceptEncoded, string accept)
{
while (true)
{
// Store params
m_url = url;
m_accept = accept;
m_postData = postData;
m_method = postData == null || method == null ? HttpMethod.Get : method;
m_dataCompression = postData == null ? DataCompression.None : dataCompression;
m_acceptEncoded = acceptEncoded;
HttpResponseMessage response = null;
try
{
HttpClientHandler httpClientHandler = GetHttpClientHandler();
HttpRequestMessage request = GetHttpRequest();
response = await GetHttpResponseAsync(httpClientHandler, request).ConfigureAwait(false);
EnsureSuccessStatusCode(response);
}
catch (HttpWebClientServiceException)
{
throw;
}
catch (HttpRequestException ex)
{
if (ex.InnerException is WebException)
{
throw HttpWebClientServiceException.HttpWebClientException(url, ex.InnerException);
}
if (response == null)
{
throw HttpWebClientServiceException.Exception(url, ex);
}
if (response.StatusCode != HttpStatusCode.Redirect && response.StatusCode != HttpStatusCode.MovedPermanently)
{
throw HttpWebClientServiceException.HttpWebClientException(url, ex, response.StatusCode);
}
}
catch (WebException ex)
{
// We should not get a WebException here but keep this as extra precaution
throw HttpWebClientServiceException.HttpWebClientException(url, ex);
}
catch (TaskCanceledException ex)
{
// We throw a request timeout if the task gets cancelled due to the timeout setting
throw HttpWebClientServiceException.HttpWebClientException(url, new HttpRequestException(ex.Message),
HttpStatusCode.RequestTimeout);
}
catch (Exception ex)
{
throw HttpWebClientServiceException.Exception(url, ex);
}
if (response.StatusCode != HttpStatusCode.Redirect && response.StatusCode != HttpStatusCode.MovedPermanently)
{
return(response);
}
// When the address has been redirected, connects to the redirection
Uri target = response.Headers.Location;
response.Dispose();
if (m_redirectsRemaining-- <= 0)
{
throw HttpWebClientServiceException.RedirectsExceededException(m_url);
}
m_referrer = m_url;
m_url = new Uri(m_url, target);
url = m_url;
}
}
