httpwebrequest time for the operation expired

[courtlanda]

I use C++CLI in MVS 2015 Community (NET 4)

My program works in the flow. The shape flow is the result and the designs are calculated. There's a static class that works from httpwebrequest. Exactly (part of class)

Announcement:

ref class http abstract sealed
{
public:
    static String^ httpGet(String^, http_params^);
    static String^ httpPost(String^, String^, http_params^);
};

Part of the definition

String^ http::httpGet(String^ url, http_params ^params)
{
    HttpWebRequest ^HReq = dynamic_cast<HttpWebRequest^>(WebRequest::Create(url));
    HReq->Method = L"GET";
    HReq->ProtocolVersion = HttpVersion::Version11;
    HReq->KeepAlive = false;
    HReq->Referer = params->referer;
    HReq->Timeout = 10000;
    HReq->UserAgent = L"Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/47.0.2526.106 Safari/537.36";
    HReq->CookieContainer = params->cookie;
    HReq->Accept = L"*/*"; 
    HReq->Headers->Add(L"Accept-Language", L"ru-RU,ru;q=0.8,en-US;q=0.6,en;q=0.4");
    HReq->Headers->Add(L"Accept-Encoding", L"gzip,deflate,sdch");
    HReq->AutomaticDecompression = DecompressionMethods::GZip;
    HReq->AllowAutoRedirect = params->is_loc;
    if (params->is_loc)
        HReq->MaximumAutomaticRedirections = 10;
HttpWebResponse ^HRes = dynamic_cast&lt;HttpWebResponse^&gt;(HReq-&gt;GetResponse());

Stream ^res_stream = HRes-&gt;GetResponseStream();

StreamReader ^ StR = gcnew StreamReader(res_stream);
String ^res = StR-&gt;ReadToEnd();
StR-&gt;Close();

res_stream-&gt;Close();

HRes-&gt;Close();

return res;

}
String^ http::httpPost(String^ url, String^ data, http_params ^params)

{

HttpWebRequest ^HReq = dynamic_cast<HttpWebRequest^>(WebRequest::Create(url));

HReq->Method = L"POST";

HReq->ServicePoint->ConnectionLeaseTimeout = 0;

HReq->ProtocolVersion = HttpVersion::Version11;

HReq->ServicePoint->Expect100Continue = false;

HReq->KeepAlive = false;

HReq->Referer = params->referer;

HReq->Timeout = 10000;

HReq->Accept = L"/";

HReq->Headers->Add(L"Accept-Language",L"ru-RU,ru;q=0.8,en-US;q=0.6,en;q=0.4");

HReq->Headers->Add(L"Accept-Encoding", L"gzip,deflate,sdch");

HReq->AutomaticDecompression = DecompressionMethods::GZip;

HReq->UserAgent = L"Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/47.0.2526.106 Safari/537.36";

HReq->CookieContainer = params->cookie;

HReq->AllowAutoRedirect = params->is_loc;

if (params->is_loc)

HReq->MaximumAutomaticRedirections = 10;

HReq->ContentType = "application/x-www-form-urlencoded";

array <Byte> ^dd = Encoding::UTF8->GetBytes(data);

HReq->ContentLength = dd->Length;
Stream ^srtwr = HReq-&gt;GetRequestStream();
srtwr-&gt;Write(dd, 0, dd-&gt;Length);
srtwr-&gt;Close();


String ^res;
HttpWebResponse ^HRes = dynamic_cast&lt;HttpWebResponse^&gt;(HReq-&gt;GetResponse());

srtwr = HRes-&gt;GetResponseStream();

StreamReader ^StR = gcnew StreamReader(srtwr, Encoding::UTF8);

res = StR-&gt;ReadToEnd();


StR-&gt;Close();

srtwr-&gt;Close();

HRes-&gt;Close();

return res;

}

The problem is, it's a early problem.

Stream ^srtwr = HReq->GetRequestStream();

or

srtwr = HRes->GetResponseStream();

Never mind, get or post

Exemption

The exception of the type "System.Net.WebException" arose in System.dll, but not
Additional information was processed in the user code: Time
Operation expectations expired

Sometimes it works normally, sometimes this exception happens all the time.

[Avante]

Exemption and second attempt. Networks, they do, sometimes they don't work.