Added "5.14 Using C++ non-static functions for callbacks?"

Updated: Feb 18, 2008 (http://curl.haxx.se/docs/faq.html)

Updated: Sep 24, 2008 (http://curl.haxx.se/docs/faq.html)

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  5.11 How do I make libcurl not receive the whole HTTP response?

  5.12 Can I make libcurl fake or hide my real IP address?

  5.13 How do I stop an ongoing transfer?

  5.14 Using C++ non-static functions for callbacks?

 6. License Issues

  6.1 I have a GPL program, can I use the libcurl library?

  If you're using the multi interface, you also stop a transfer by removing

  the particular easy handle from the multi stack.

  5.14 Using C++ non-static functions for callbacks?

  libcurl is a C library, it doesn't know anything about C++ member functions.

  You can overcome this "limitation" with a relative ease using a static

  member function that is passed a pointer to the class:

     // f is the pointer to your object.

     static YourClass::staticFunction(void *buffer, size_t sz, size_t n, void *f)

     {

       // Call non-static member function.

       static_cast<YourClass*>(f)->nonStaticFunction();

     }

     // This is how you pass pointer to the static function:

     curl_easy_setopt(hcurl, CURLOPT_WRITEFUNCTION, YourClass:staticFunction);

     curl_easy_setopt(hcurl, CURLOPT_WRITEDATA, this);

6. License Issues

  Curl and libcurl are released under a MIT/X derivate license. The license is