curl WRITEFUNCTION and classes

handle must be a static member function. You can pass a pointer to the instance of Filter as last argument by using CURLOPT_WRITEDATA

class Filter{ private:    std::string content_;    static size_t handle(char * data, size_t size, size_t nmemb, void * p);    size_t handle_impl(char * data, size_t size, size_t nmemb);};size_t Filter::handle(char * data, size_t size, size_t nmemb, void * p){    return static_cast<Filter*>(p)->handle_impl(data, size, nmemb);}size_t Filter::handle_impl(char* data, size_t size, size_t nmemb){    content_.append(data, size * nmemb);    return size * nmemb;}int main(){   // curl initialization... should be done in a constructor   Filter f;   curl_easy_setopt(curl, CURLOPT_WRITEDATA, &f);   curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, &Filter::handle);   // curl cleanup... should be done in a destructor   return 0;}

string temp;curl_easy_setopt(curl,CURLOPT_WRITEFUNCTION,handle);curl_easy_setopt(curl,CURLOPT_WRITEDATA,&temp);size_t Filter::handle(void *ptr, size_t size, size_t nmemb, string stream){    string temp(static_cast<const char*>(ptr), size * nmemb);    stream = temp;    return size*nmemb;}

thats how i got it to work.. this will save the website to the string named temp.

I am using curlpp:

std::stringstream result;request.setOpt(cURLpp::Options::WriteStream(&result));request.perform();

this will save the reply webserver to the stringstream named result.