Perl: Programatically set POST param using REST::Client module - perl

Question

I've built a REST Server and now I want to rapidly test it from a Perl Client, using REST::Client module.
It works fine if I perform GET Request (explicitly setting parameters in the URL) but I can't figure out how to set those params in POST Requests.
This is how my code looks like:
#!/usr/bin/perl
use strict;
use warnings;
use REST::Client;
my $client = REST::Client->new();
my $request_url = 'http://myHost:6633/my_operation';
$client->POST($request_url);
print $client->responseContent();
I've tried with something similar to:
$client->addHeader ('my_param' , 'my value');
But it's clearly wrong since I don't want to set an HTTP predefined Header but a request parameter.
Thank you!

Answer 1

It quite straight forward. However, you need to know what kind of content the server expects. That will typically either be XML or JSON.
F.ex. this works with a server that can understand the JSON in the second parameter, if you tell it what it is in the header in the third parameter.
$client->POST('http://localhost:3000/user/0/', '{ "name": "phluks" }', { "Content-type" => 'application/json'});

Answer 2

The REST module accepts a body content parameter, but I found to make it work with a string of parameters, you need to set a proper content type.
So the following code works for me:
$params = $client->buildQuery([username => $args{username},
password => $args{password}]);
$ret = $client->POST('api/rest/0.001/login', substr($params, 1),
{'Content-type' => 'application/x-www-form-urlencoded'});

Answer 3

I've not used the REST module, but looking at the POST function, it accepts a body content parameter, try creating a string of the parameters and send that within the function
$client->POST($request_url, "my_param=my+value");
print $client->responseContent();