/// <exception cref="Apache.Http.Client.ClientProtocolException"></exception>
private static HttpHost DetermineTarget(IHttpUriRequest request)
{
// A null target may be acceptable if there is a default target.
// Otherwise, the null target is detected in the director.
HttpHost target = null;
URI requestURI = request.GetURI();
if (requestURI.IsAbsolute())
{
target = URIUtils.ExtractHost(requestURI);
if (target == null)
{
throw new ClientProtocolException("URI does not specify a valid host name: " + requestURI
);
}
}
return(target);
}
/// <exception cref="System.IO.IOException"></exception>
/// <exception cref="Apache.Http.HttpException"></exception>
public virtual CloseableHttpResponse Execute(HttpRoute route, HttpRequestWrapper
request, HttpClientContext context, HttpExecutionAware execAware)
{
Args.NotNull(route, "HTTP route");
Args.NotNull(request, "HTTP request");
Args.NotNull(context, "HTTP context");
IList <URI> redirectLocations = context.GetRedirectLocations();
if (redirectLocations != null)
{
redirectLocations.Clear();
}
RequestConfig config = context.GetRequestConfig();
int maxRedirects = config.GetMaxRedirects() > 0 ? config.GetMaxRedirects() : 50;
HttpRoute currentRoute = route;
HttpRequestWrapper currentRequest = request;
for (int redirectCount = 0; ;)
{
CloseableHttpResponse response = requestExecutor.Execute(currentRoute, currentRequest
, context, execAware);
try
{
if (config.IsRedirectsEnabled() && this.redirectStrategy.IsRedirected(currentRequest
, response, context))
{
if (redirectCount >= maxRedirects)
{
throw new RedirectException("Maximum redirects (" + maxRedirects + ") exceeded");
}
redirectCount++;
IHttpRequest redirect = this.redirectStrategy.GetRedirect(currentRequest, response
, context);
if (!redirect.HeaderIterator().HasNext())
{
IHttpRequest original = request.GetOriginal();
redirect.SetHeaders(original.GetAllHeaders());
}
currentRequest = HttpRequestWrapper.Wrap(redirect);
if (currentRequest is HttpEntityEnclosingRequest)
{
Proxies.EnhanceEntity((HttpEntityEnclosingRequest)currentRequest);
}
URI uri = currentRequest.GetURI();
HttpHost newTarget = URIUtils.ExtractHost(uri);
if (newTarget == null)
{
throw new ProtocolException("Redirect URI does not specify a valid host name: " +
uri);
}
// Reset virtual host and auth states if redirecting to another host
if (!currentRoute.GetTargetHost().Equals(newTarget))
{
AuthState targetAuthState = context.GetTargetAuthState();
if (targetAuthState != null)
{
this.log.Debug("Resetting target auth state");
targetAuthState.Reset();
}
AuthState proxyAuthState = context.GetProxyAuthState();
if (proxyAuthState != null)
{
AuthScheme authScheme = proxyAuthState.GetAuthScheme();
if (authScheme != null && authScheme.IsConnectionBased())
{
this.log.Debug("Resetting proxy auth state");
proxyAuthState.Reset();
}
}
}
currentRoute = this.routePlanner.DetermineRoute(newTarget, currentRequest, context
);
if (this.log.IsDebugEnabled())
{
this.log.Debug("Redirecting to '" + uri + "' via " + currentRoute);
}
EntityUtils.Consume(response.GetEntity());
response.Close();
}
else
{
return(response);
}
}
catch (RuntimeException ex)
{
response.Close();
throw;
}
catch (IOException ex)
{
response.Close();
throw;
}
catch (HttpException ex)
{
// Protocol exception related to a direct.
// The underlying connection may still be salvaged.
try
{
EntityUtils.Consume(response.GetEntity());
}
catch (IOException ioex)
{
this.log.Debug("I/O error while releasing connection", ioex);
}
finally
{
response.Close();
}
throw;
}
}
}