Harsh Modawel wrote:
Hi,
I had few questions regarding the function the client should
provide to "Query the server and return the response" i.e. The client
function passed in call to xen_session_login_with_password()
session->call_func = call_func;
I see that the xen calls do pass data(input) in the XML-format while
calling this client function.
My questions are -
1) How should I use that data ? (as its already in XML format).
I can't pass it as it is to server, nor I can use xmlrpc_client_call
on it, hence was wondering, the intention ?
That data is ready to be passed to the server. Just put it as payload
in some transport and send it along. See
tools/libxen/test/test_bindings.c. Also FYI, here is example
(simplified) from xen cim providers
static int call_func(const void *data, size_t len, void *user_handle,
void *result_handle, xen_result_func result_func)
{
xen_utils_session *s = (xen_utils_session *)user_handle;
char *read_buf = NULL;
int ccode = 0;
/* Send data to xend xmlrpc server. */
if (!xen_utils_xend_post(s->socket, (char *)data, len))
return -1;
/* Read response from xend. */
ccode = xen_utils_xend_read(s->socket, &read_buf);
/* Check for errors and handle appropriately */
/* Call result_func to process response */
result_func(read_buf, strlen(read_buf), result_handle);
/* Free buffer containing result */
if (read_buf)
free(read_buf);
return ccode;
}
Regards,
Jim
2) Where should I store the result (so that XenCaller can read it). I
guess, on success I should be returning a NULL value, as the return is
stored in "error", followed by calls "if (error)".
3) In which format does that api expect the result data ? (same XML
format or should I make use of xmlrpc calls to take out the value from
the response).
4) If one knows the link/doc I should have read, then please let me know.
Regards,
-harsh
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