Hi curlpp geek:

I read the source code of the example05.cpp(Function functor for
WriteFunction example), the callback WriteMemoryCallback must be
declared static, otherwise it won't link...

So it acts like a class member use a static function pointer only
based on curl but not curlpp, such as

static size_t
WriteFunction(char *ptr, size_t size, size_t nmemb, std::string *stream)
{
 if (stream == NULL)
 {
   return 0;
 }

 stream->append(ptr, size * nmemb);
 cout << ptr << endl;

 return size * nmemb;
}

void *
CGI::Print()
{
 curl_easy_setopt(this->curl, CURLOPT_WRITEDATA, &this->buffer);
 curl_easy_setopt(this->curl, CURLOPT_WRITEFUNCTION, WriteFunction);

 return NULL;
}

When I even know the callback functor can not use a member function
pointer, I still modified the example05.cpp to see whether it work or
not, such as:

size_t
Callback::WriteMemoryCallback(char* ptr, size_t size, size_t nmemb)
{
 size_t realsize = size * nmemb;

 this->m_pBuffer = (char*) this->Realloc(this->m_pBuffer,
this->m_Size + realsize);

 if (this->m_pBuffer == NULL) {
   realsize = 0;
 }

 memcpy(&(this->m_pBuffer[this->m_Size]), ptr, realsize);
 this->m_Size += realsize;

 return realsize;
};

void Callback::print()
{
 cURLpp::Types::WriteFunctionFunctor functor(this->*WriteMemoryCallback);
 cURLpp::Options::WriteFunction *test = new
cURLpp::Options::WriteFunction(functor);
 this->request.setOpt(test);
 this->request.perform();

 std::cout << "Content: " << std::endl << this->m_pBuffer << std::endl;
}

And yes '((Callback*)this)->Callback::WriteMemoryCallback' cannot be
used as a member pointer, since it is of type '<unresolved overloaded
function type>'

So the C++ wrapper of curl still can not make callback functor to use
the member function pointer, right?

sirtoozee

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