c# - Why HttpClient blocks forever with chunked encoding? -

here's simple code snippet:

var httpmessage = new httprequestmessage(httpmethod.get, "https://google.com")) var task = client.sendasync(httpmessage, httpcompletionoption.responseheadersread); var response = await task; 

this code works fine. when replace custom server gives me chunked encoding "await task" hangs forever.

i've got backing code working through streamsocket , know server works fine. read http headers, parse incoming chunks e.t.c. problem why httpclient hangs chunked encoding?

update:

i forgot mention i'm using customhttphandler allow untrusted certificates.

/// <summary> ///     httpmessagehandler lets use windows runtime ihttpfilter types /// </summary> public class customhttpclienthandler : httpmessagehandler {     static readonly list<chainvalidationresult> allowedcertificateerrors =         new list<chainvalidationresult>(){             chainvalidationresult.expired,             chainvalidationresult.untrusted,             chainvalidationresult.invalidname,         };      private static readonly version noversion = new version(0, 0);     private static readonly version version10 = new version(1, 0);     private static readonly version version11 = new version(1, 1);     private static readonly version version20 = new version(2, 0);     private readonly rt.httpclient _client;     private bool _disposed = false;      public customhttpclienthandler()     {         var filter = new httpbaseprotocolfilter();         foreach (var error in allowedcertificateerrors)             filter.ignorableservercertificateerrors.add(error);          _client = new rt.httpclient(filter);     }      protected override async task<httpresponsemessage> sendasync(httprequestmessage request, cancellationtoken cancellationtoken)     {         checkdisposed();          var rtmessage = await converthttprequestmessagetort(request, cancellationtoken).configureawait(false);         var resp = await _client.sendrequestasync(rtmessage).astask(cancellationtoken).configureawait(false);         var netresp = await convertrtresponsemessagetonet(request, resp, cancellationtoken).configureawait(false);          return netresp;     }      internal static async task<rt.httprequestmessage> converthttprequestmessagetort(httprequestmessage message, cancellationtoken token)     {         var rt = new rt.httprequestmessage()         {             method = new rt.httpmethod(message.method.method),             content = await getcontentfromnet(message.content).configureawait(false),             requesturi = message.requesturi,         };          copyheaders(message.headers, rt.headers);          foreach (var prop in message.properties)             rt.properties.add(prop);          return rt;     }      internal static void copyheaders(ienumerable<keyvaluepair<string, ienumerable<string>>> source, idictionary<string, string> destination)     {         var headers = kvp in source                       val in kvp.value                       select new keyvaluepair<string, string>(kvp.key, val);         destination.clear();         foreach (var header in headers)             destination.add(header);     }      internal static async task<rt.ihttpcontent> getcontentfromnet(httpcontent content)     {         if (content == null)             return null;          rt.ihttpcontent c;         if (content stringcontent)             c = new rt.httpstringcontent(await content.readasstringasync().configureawait(false),                  windows.storage.streams.unicodeencoding.utf8);         else         {             var stream = await content.readasstreamasync().configureawait(false);             c = new rt.httpstreamcontent(stream.asinputstream());         }          copyheaders(content.headers, c.headers);          return c;     }      internal static async task<httpcontent> getnetcontentfromrt(rt.ihttpcontent content, cancellationtoken token)     {         if (content == null)             return null;          var str = await content.readasinputstreamasync().astask(token).configureawait(false);          var c = new streamcontent(str.asstreamforread());          foreach (var header in content.headers)             c.headers.tryaddwithoutvalidation(header.key, header.value);          return c;     }      internal static async task<httpresponsemessage> convertrtresponsemessagetonet(httprequestmessage request, rt.httpresponsemessage message, cancellationtoken token)     {         var resp = new httpresponsemessage((httpstatuscode)(int)message.statuscode)         {             reasonphrase = message.reasonphrase,             requestmessage = request,             content = await getnetcontentfromrt(message.content, token).configureawait(false),             version = getversionfromenum(message.version),         };          foreach (var header in message.headers)             resp.headers.tryaddwithoutvalidation(header.key, header.value);          return resp;     }      internal static version getversionfromenum(rt.httpversion version)     {         switch (version)         {             case rt.httpversion.none:                 return noversion;             case rt.httpversion.http10:                 return version10;             case rt.httpversion.http11:                 return version11;             case rt.httpversion.http20:                 return version20;             default:                 throw new argumentoutofrangeexception("version");         }     }      private void checkdisposed()     {         if (_disposed)             throw new objectdisposedexception("winrthttpclienthandler");     }      protected override void dispose(bool disposing)     {         if (disposing && !_disposed)         {             _client.dispose();              _disposed = true;         }          base.dispose(disposing);     } } 

update:

on desktop use httpwebrequest communicate server. winrt don't have option allow self-signed certificates httpwebrequest that's why switched httpclient