Step 1 in the x.commerce demo application

step1.php

F3::route('POST /cart_order',
	function() {

                //gets the schema URI, parses it
		$json_schema = Web::http('GET '.F3::get('SESSION.cart_uri'));
		error_log($json_schema);
		$avro_schema  = AvroSchema::parse($json_schema);
		$datum_writer = new AvroIODatumWriter($avro_schema);
		$write_io     = new AvroStringIO();
		$encoder      = new AvroIOBinaryEncoder($write_io);

		$ch = curl_init();

		//get around php magic quotes if needed
		//for JSON_decode to work, encode the message body
		if(get_magic_quotes_gpc()){
		  $d = stripslashes($_POST['json_message']);
		}else{
		  $d = $_POST['json_message'];
		}
		$message = json_decode($d, true);

		$datum_writer->write($message, $encoder);

                //gets the topic on which the message is sent
		curl_setopt($ch, CURLOPT_URL, F3::get('SESSION.cart_topic') );
		// pure evil! just for the sake of this example.
		curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false); 

                //sets method (POST) and headers for the request
		curl_setopt($ch, CURLOPT_HEADER, true); 
		curl_setopt($ch, CURLOPT_RETURNTRANSFER, true); 
		curl_setopt($ch, CURLOPT_TIMEOUT, 10); 
		curl_setopt($ch, CURLOPT_POST, true); 
		curl_setopt($ch, CURLOPT_HTTPHEADER, 
		    array("Content-Type: avro/json"
		         ,"Authorization: ".F3::get('SESSION.cart_token')
		    	 ,"X-XC-MESSAGE-GUID-CONTINUATION: "
                         //the next two are the ones you can generate for this guide
		    	 ,"X-XC-WORKFLOW-ID: "   . F3::get('wf_id')
                       	 ,"X-XC-TRANSACTION-ID: " . F3::get('transaction_id')
		         ,"X-XC-SCHEMA-VERSION: " . F3::get('SESSION.cart_ver')));

                //send the curl POST
		curl_setopt($ch, CURLOPT_POSTFIELDS, $write_io->string());
		$response = curl_exec($ch);
		echo $response;
	}
);