Curl: Put request with postfields libcurl c++

From: Zaid Amir <z.alamir_at_genie-soft.com>
Date: Mon, 2 Nov 2009 09:26:56 +0200

I am somewhat new to libcurl and I was recently faced with a problem that I
hope someone can have the answer to it. My problem is that I'm supposed to
send a PUT request to a website and that request should also include an XML
as raw data. The problem is I can't seem to be able to configure my read
callback to read from a string if that is actually how its done. Basically
I'm trying to send this request to Amazon S3 to enable their new versioning
feature, and as described by Amazon, I am supposed to do something like
this:

PUT /?versioning HTTP/1.1

Host: bucket.s3.amazonaws.com

Date: Wed, 12 Oct 2009 17:50:00 GMT

Authorization: AWS 15B4D3461F177624206A:xQE0diMbLRepdf3YB+FIEXAMPLE=

Content-Type: text/plain

Content-Length: 124

</VersioningConfiguration>

Now the first part of the request is straight forward and I don't really
have any problem with it; the xml data part however is giving me nightmares
as I have tried almost everything to make it work, I even tried adding it
manually via the HTTPHEADER and it did not work.

And as I mentioned above, I tried reading the data directly from a string
although I don't think it's the right approach but still here is my
READFUNCTION:

size_t readTextCallback(void* ptr,size_t size, size_t nmemb, void* stream)

{

#ifdef _DEBUG

cout << "read_data being called" << endl;

#endif

string* strptrdst = static_cast<string*>(ptr);

strptrdst = static_cast<string*>(stream);

return nmemb*size;

}

Now for some reason, when I use a read function Curl keeps calling the
function until the request gets terminated by the remote host.

Can someone please help..

Regards