Hi Jeff:
Thanks for responding,let me make sure I understand, are you saying do the
following:

/* libcurl callback function */
extern "C" size_t * write_data(void *source ,size_t,size ,size_t nmemb ,void
*userData);

extern "C" size_t * write_data(void *source ,size_t size ,size_t nmemb ,void
  *userData)
{
   size_t * retval;
   return retval;
}

Just out of curiosity is this because I am passing in the address of the
function write_data in the CURLOPT_WRITEFUNCTION

Thanks again for your help
SK

>From: Jeff Phillips <jeff_at_seasideresearch.com>
>Reply-To: jeff_at_seasideresearch.com, libcurl development
><curl-library_at_cool.haxx.se>
>To: libcurl development <curl-library_at_cool.haxx.se>
>Subject: Re: Issue With curl_easy_perform
>Date: Fri, 31 Mar 2006 17:14:07 -0800 (PST)
>
>Hello Saikat,
>
>Your implementation of write_data should return size *
>nmemb, so that libcurl knows that your application has
>processed the data.
>
>Take care,
>Jeff Phillips
>
>--- Saikat Kanjilal <sxk1969_at_hotmail.com> wrote:
>
> > Hello All:
> > I am trying to use libcurl to do a simple http_post,
> > I have the code below,
> > everything works like a charm except that
> > curl_easy_perform keeps popping up
> > this window, I have a callback function that I have
> > written using
> > CURLOPT_WRITEFUNCTION but that still does not make
> > the dos window completely
> > go away, any help on this would be much appreciated.
> > I have been struggling
> > with this for a day or so, any ideas??
> >
> >
> >
> > /* libcurl callback function */
> > extern "C" size_t write_data(void *source ,size_t
> > size ,size_t nmemb ,void
> > *userData);
> >
> > extern "C" size_t write_data(void *source ,size_t
> > size ,size_t nmemb ,void
> > *userData)
> > {
> > size_t retval=0;
> > std::cout<<"Inside write_data\n";
> > return retval;
> > }
> >
> >
> > int MyClass::uploadFile(std::string URL,std::string
> > path)
> > {
> > CURL *curl;
> > CURLcode res;
> >
> > struct curl_httppost *formpost=NULL;
> > struct curl_httppost *lastptr=NULL;
> > struct curl_slist *headerlist=NULL;
> > char buf[] = "Expect:";
> > bool delFile = false;
> >
> > curl_global_init(CURL_GLOBAL_ALL);
> >
> > /* Fill in the file upload field */
> > curl_formadd(&formpost,
> > &lastptr,
> > CURLFORM_COPYNAME, "sendfile",
> > CURLFORM_FILE, path.c_str(),
> > CURLFORM_END);
> >
> > /* Fill in the filename field */
> > curl_formadd(&formpost,
> > &lastptr,
> > CURLFORM_COPYNAME, "filename",
> > CURLFORM_COPYCONTENTS, path.c_str(),
> > CURLFORM_END);
> >
> >
> > /* Fill in the submit field too, even if this is
> > rarely needed */
> > curl_formadd(&formpost,
> > &lastptr,
> > CURLFORM_COPYNAME, "submit",
> > CURLFORM_COPYCONTENTS, "send",
> > CURLFORM_END);
> >
> > curl = curl_easy_init();
> >
> > /* initalize custom header list (stating that
> > Expect: 100-continue is not
> > wanted */
> > headerlist = curl_slist_append(headerlist, buf);
> >
> > /* if we have a handle proceed with the transaction
> > */
> > if(curl)
> > {
> > curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION,
> > &write_data);
> >
> > /* what URL that receives this POST */
> > curl_easy_setopt(curl, CURLOPT_URL, URL.c_str());
> > curl_easy_setopt(curl, CURLOPT_HTTPPOST,
> > formpost);
> > res = curl_easy_perform(curl);
> >
> > /* if the file was transported successfully we
> > need to delete
> > the file else wait a while and try to upload
> > */
> > if (res==CURLE_OK)
> > delFile=true;
> > else
> > {
> > /* if we are here we wait
> > and try the upload again till we are
> > successful
> > for now we set this to 2 minutes
> > later it will be configurable
> > */
> > Sleep(120000);
> > uploadFile(URL,path);
> > }
> >
> >
> > /* cleanup */
> > curl_easy_cleanup(curl);
> >
> > /* then cleanup the formpost chain */
> > curl_formfree(formpost);
> >
> > /* free slist */
> > curl_slist_free_all (headerlist);
> > }
> >
> > if (delFile)
> > DeleteLog(path);
> > return res;
> > }
> >
> > Thanks Again
> >
> >
> >
>
Received on 2006-04-01