Using Zend_Http_Client to send json POST - php

Question

I'm trying to send a json object as a POST command using the following:
$uri = "http://amore-luce.com/product_create";
$product = $observer->getEvent()->getProduct();
$json = Mage::helper('core')->jsonEncode($product);
Mage::log(" Json={$json}", null,'product-updates.txt');
// new HTTP request to some HTTP address
$client = new Zend_Http_Client('http://amore-luce.com/product_create');
// set some parameters
$client->setParameterPost('product', $json);
// POST request
$response = $client->request(Zend_Http_Client::POST);
When I view the $json the data is there and all looks good - however the POST is not sending the json data. I'm capturing it using a simple email form that should send me the response:
<?php
$webhookContent = "";
$ref = "";
$webhook = fopen('php://input' , 'rb');
while (!feof($webhook)) {
$webhookContent .= fread($webhook, 4096);
}
fclose($webhook);
$headers = array();
foreach($_SERVER as $key => $value) {
if (substr($key, 0, 5) <> 'HTTP_') {
continue;
}
$header = str_replace(' ', '-', ucwords(str_replace('_', ' ', strtolower(substr($key, 5)))));
$headers[$header] = $value;
}
foreach ($headers as $header => $value) {
$ref .= "$header: $value <br />\n";
}
$post = file_get_contents('php://input');
$to = "address#my-email.com"; //the address the email is being sent to
$subject = "This is the subject"; //the subject of the message
$msg = "This is the message - Webhook content: ".$webhookContent." This is url: ".$ref; //the message of the email
mail($to, $subject, $msg, 'From: PHP Scriptv2 <noreply#domain.com>'); //send the email.
echo ($_SERVER['HTTP_REFERER']."<br>".$_SERVER['REQUEST_URI']);
?>
This page works with other json POST requests I've sent to it. I'm fairly new at sending POST requests so any help would be greatly appreciated.

Answer 1

Try change :
$client->setParameterPost('product', $json);
to :
$client->setHeaders('Content-type','application/json');
$client->setParameterPost('product', $json);
or use:
$client->setRawData($json, 'application/json');

Answer 2

So Update / Answer changing how I did it to these lines of code:
$uri = "http://requestb.in/p6p4syp6";
$product = $observer->getEvent()->getProduct();
$json = Mage::helper('core')->jsonEncode($product);
Mage::log(" Json={$json}", null,'product-updates.txt');
$client = new Zend_Http_Client($uri);
$client->setRawData($json, null)->request('POST');
Changing the SetRawData($json, null) was the bit - using SetRawDate($json, 'application/json') caused it to fail.
Thanks Voodoo417 - I'll also try your suggestion and see if that lets me set the correct type