I'm trying to use libcurl to upload some files in a C++ program (no
wrapper, just straight libcurl). I'm feeding curl data straight from memory
via the CURLOPT_READFUNCTION and CURLOPT_READDATA options. While the
connect and transfer are fine, curl always uploads the file as (nil). I see
no way to actually set the remote filename through options either, but I
could be missing an option.

Speaking of which, the current curl_easy_setopt page on the web
(http://curl.sourceforge.net/libcurl/c/curl_easy_setopt.html - didn't check
SE or other versions) is missing sections due to bad HTML - notably
CURLOPT_READDATA and anything else near a "NOTE" section. The man pages are
fine though.

Here's a sample C program that replicates the behavior. I'm on AIX 4.3.3
using xlc as a compiler. libcurl was compiled on this box with gcc 3.2.1.
You'll need to change the destURL and userpwd values as needed, obviously.

Thanks for any help.

--- begin
ftptest.c -----------------------------------------------------------------

----
#include <stdio.h>
#include <stdlib.h>
#include <curl.h>
size_t dataSize;
size_t
readFtpData(void* ptr, size_t size, size_t nmemb, void* stream)
{
    size_t total = size * nmemb;
    if (total > dataSize)
    {
        total = dataSize;
    }
    if (total > 0)
    {
        memcpy(ptr, stream, total);
        memcpy(stream, ((char*)stream)+total, dataSize-total);
        dataSize -= total;
    }
    return total;
}
int
main(int argc, char* argv[])
{
    char* destURL = "ftp://yourhosthere/tmp/test/";
    char* userpwd = "user:passwd";
    char* data =
"asdlfjsdjfksjadkfjsdkjf;jsdkl;jfl;sdghhgadshfohyfpoyiopqypwoe\n";
    CURL* myCurl = curl_easy_init();
    curl_easy_setopt(myCurl, CURLOPT_VERBOSE, 1);
    curl_easy_setopt(myCurl, CURLOPT_NOPROGRESS, 1);
    curl_easy_setopt(myCurl, CURLOPT_URL, destURL);
    curl_easy_setopt(myCurl, CURLOPT_USERPWD, userpwd);
    curl_easy_setopt(myCurl, CURLOPT_INFILESIZE, strlen(data));
    curl_easy_setopt(myCurl, CURLOPT_UPLOAD, 1);
    curl_easy_setopt(myCurl, CURLOPT_READFUNCTION, readFtpData);
    curl_easy_setopt(myCurl, CURLOPT_READDATA, data);
    dataSize = strlen(data);
    curl_easy_perform(myCurl);
    curl_easy_cleanup(myCurl);
    return 0;
}
--- end
ftptest.c -----------------------------------------------------------------
----
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