c++ - HTTP request in DLL returns nothing -


i'm trying request dll (which hooked program) no matter try, hangs.

i tried use curl , winhttpclient. both did same thing differently.

curl made program hang long time , displayed nothing (that code isn't commented , contains code other stack overflow questions.)

winhttpclient returns nothing.

// dllmain.cpp : defines entry point dll application. #include "stdafx.h" //#include "winhttpclient/winhttpclient.h" #include <windows.h> #include <iostream> #include <stdio.h> #include <curl/curl.h>  using namespace std; // fix later  static size_t writecallback(void *contents, size_t size, size_t nmemb, void *userp) {     ((std::string*)userp)->append((char*)contents, size * nmemb);     return size * nmemb; }  extern "c" __declspec(dllexport) void quack();  __declspec(dllexport) void quack() {     /*winhttpclient client(l"http://www.google.com");     client.setuseragent(l"mozilla/4.0 (compatible; msie 8.0; windows nt 5.1;...)");      client.sendhttprequest();     wstring httpresponseheader = client.getresponseheader();     wstring httpresponsecontent = client.getresponsecontent();      std::string thingstr((const char*)&httpresponsecontent[0], sizeof(wchar_t) / sizeof(char)*httpresponsecontent.size());      lpcstr thing = (lpcstr)httpresponsecontent.c_str();      messageboxa(null, thing, "quack", mb_ok);*/      curl *curl;     curlcode res;     std::string readbuffer;      curl = curl_easy_init();     if (curl) {         curl_easy_setopt(curl, curlopt_url, "http://www.google.com");         curl_easy_setopt(curl, curlopt_writefunction, writecallback);         curl_easy_setopt(curl, curlopt_writedata, &readbuffer);         res = curl_easy_perform(curl);         curl_easy_cleanup(curl);     }      messageboxa(null, (lpcstr)readbuffer.c_str(), "quack", mb_ok); }  bool apientry dllmain( hmodule hmodule,                        dword  ul_reason_for_call,                        lpvoid lpreserved                      ) {     switch (ul_reason_for_call)     {         case dll_process_attach:             quack();         case dll_thread_attach:         case dll_thread_detach:         case dll_process_detach:             break;     }     return true; }

does have solution? answer or suggestion appreciated.


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