managed c++ - Logging into a forum with CURL (C++) -


i trying login website application in managed c++. i'm using curl this, , although i'm not receiving errors, i'm confused on how information needed check whether login successful or not. couldn't find similar issue mine unfortunately, appreciate help. 

private: system::void blogin_click ( system::object^ sender, system::eventargs^  e ) {     if ( system::string::isnullorempty ( tbusername->text ) )     {         system::string^ str = gcnew system::string ( "login failed! please enter valid username." );         system::windows::forms::messagebox::show ( str );          return;     }     if ( system::string::isnullorempty ( tbusername->text ) )     {         system::string^ str = gcnew system::string ( "login failed! please enter valid password" );         system::windows::forms::messagebox::show ( str );          return;     }      using system::runtime::interopservices::marshal;      curl_global_init ( curl_global_all );      curl* curl = curl_easy_init ();     if ( !curl )     {         curl_global_cleanup ();         return;     }      curl_easy_setopt ( curl, curlopt_ssl_verifypeer, 1l );      curl_easy_setopt ( curl, curlopt_ssl_verifyhost, 1l );        curl_easy_setopt ( curl, curlopt_useragent, "mozilla/4.0" );      curl_easy_setopt ( curl, curlopt_followlocation, 1 );     curl_easy_setopt ( curl, curlopt_url, "https://www.myurl.com/member.php?action=login" );      const char* szuser = static_cast< const char* >( marshal::stringtohglobalansi ( tbusername->text ).topointer () );     const char* szpass = static_cast< const char* >( marshal::stringtohglobalansi ( tbpassword->text ).topointer () );       curl_easy_setopt ( curl, curlopt_post, 1l );     curl_easy_setopt ( curl, curlopt_postfields, fmt::fmt ( "username=%s&password=%s", szuser, szpass ) );     //curl_easy_setopt ( curl, curlopt_userpwd, fmt::fmt ( "%s:%s", szuser, szpass ) );      std::string strdata;     curl_easy_setopt ( curl, curlopt_writefunction, writecallback );     curl_easy_setopt ( curl, curlopt_writedata, &strdata );       curlcode res = curl_easy_perform ( curl );     /* curle_ok */      if ( res != curle_ok )     {         system::windows::forms::messagebox::show ( "a error has occured during login process." );     }      marshal::freehglobal ( system::intptr ( reinterpret_cast< long long >( szuser ) ) );     marshal::freehglobal ( system::intptr ( reinterpret_cast< long long >( szpass ) ) );      /* check if suceeded here... in strdata same whether credentials right or wrong */       curl_easy_cleanup ( curl );     curl_global_cleanup (); }

also, website came "wildcard ssl" i'm not sure if matters? i'm pretty new of i'm sorry if i'm doing wrong.

distinguishing between successful login , failed 1 totally depends on reply offered server. don't know web application involved, can't provide more precise info.

secondly, using curl managed c++ project strange. have access .net framework provides http clients easier use, avoiding manual cleanup/marshaling.


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