http post is not working using cUrl (libcurl)

Question

I'm making simple http post request using libcurl to index.php file on my web server that has the following simple code writing post data to a file

if (isset($_POST['abc'])){
    $log="abc.log";
    $h=fopen($log,"w");
    fwrite($h,$_POST['abc']);
    fclose($h);
}  

while my written c++ code implementing http post request is the following

    CURL *curl;
    CURLcode res;
    curl=curl_easy_init();
    string url=AnsiString("http://127.0.0.1/curl/index.php?abc=123").c_str();
    string data="abc=3434";
    if (curl) {

        curl_easy_setopt(curl, CURLOPT_POST, 1);
        curl_easy_setopt(curl, CURLOPT_POSTFIELDS,AnsiString("abc=3434").c_str());
        curl_easy_setopt(curl, CURLOPT_URL,AnsiString("http://127.0.0.1/curl/index.php").c_str());
        res=curl_easy_perform(curl);
        curl_easy_cleanup(curl);
    }

First, posting is enabled curl_easy_setopt(curl, CURLOPT_POST, 1);

Second, if I debug this code i get CURL_OK status in res (return value) and also TCP 127.0.1:80 will be established everytime i run the code monitoring via netstat -ano 15 but the file abc.log is empty

What's wrong with this?? Haven't you any idea pointing me to the right way?

Thank you in advance!

Answer 1

Sending CURLOPT_POSTFIELDSIZE helped!
curl_easy_setopt(curl, CURLOPT_POSTFIELDSIZE,data.Length());

Apache log says it's ok you've sent POST

127.0.0.1 - - [03/Mar/2012:17:39:06 +0500] "POST /curl/post.php HTTP/1.1" 200 -