Did you even look for information before you posted?
There are a few examples of what I believe that you are trying to do but this one gives you everything you are asking for.
I read the concept of HTTP Client VIs. And used the POST.vi to send the data "Welcome" on URL But this given string can not received on third party specified URL. I attached the using post vi.png file. It returns the HTTP /1.1 404 not found. How can I solved this issue?
I got the solution . Now I am able to transfer the data on URL. Actually the problem is the URL was not complete. That why that error came.
Thank you ...