Accesssing web service within Unity

Unity Engine
1

I’m currently working on a web app that needs to acquire information from an online database. I’m trying to access a SOAP web service with an HTTP POST request using XML. So far I’ve been trying to use WWW and WWWForm class to do this, but I haven’t been able to find any proper examples to guide me. Does anyone have an example or ideas (or some thread that’s already been answered that I did not see) to send an HTTP POST request in properly formed XML within Unity Javascript?

The example of the HTTP POST request format:

POST /Service.asmx HTTP/1.1
Host: [url]www.websitedata.com[/url]
Content-Type: application/soap+xml; charset=utf-8
Content-Length: length
<?xml version="1.0" encoding="utf-8"?>
<soap12:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:soap12="http://www.w3.org/2003/05/soap-envelope">
<soap12:Body>
<GetData xmlns="www.websitedatacom">
<userToken>string</userToken>
<symbol>string</symbol>
<startDate>dateTime</startDate>
<endDate>dateTime</endDate>
<IncludeHeaderOrSchema>boolean</IncludeHeaderOrSchema>
</GetData>
<?/soap12:Body>
</soap: Envelope>

Any help you can provide would be appreciated as I’m still fairly new to this. Thanks!

2

I am not at my pc right now but I will post some code when I get in today. The WWW class has an overloaded method to call a URL and allows you to pass in a hashtable of HTTP header values and I think a string or some data bytes. Works perfect with our web services. Again sorry for the lack of solid memory set it up a while ago and haven’t thought much of it since.

3

Here is en example version of my code. The XML is actually something useful in the real thing and could be replaced with JSON or whatever.

		System.Text.UTF8Encoding encoding = new System.Text.UTF8Encoding();
		Hashtable postHeader = new Hashtable();

		string xmlPostData = "<?xml version=\"1.0\"?>";
		
		postHeader.Add("Content-Type", "application/x-www-form-urlencoded");
		postHeader.Add("Content-Length", xmlPostData.Length);
		postHeader.Add("Connection", "Keep-Alive");
		postHeader.Add("Pragma", "no-cache");
		
		return new WWW("http://somewhere.org", encoding.GetBytes(xmlPostData), postHeader);
4

Thanks Michael, that helps a lot. We were looking for an example like that, so we can work with that. I’ll post if I have any more issues.

5

So I got everything working, the code is sending and receiving information from the online database, however, when I built the program to a web player, it did not send out the request, or there was no response (not sure where I would check this at).

So is there a different way to do HTTP POST requests if you’re working inside a web player? or something that needs to be altered? here is a sample of my code for the request, maybe it just involves tweaking something to work outside of the unity editor.

static function GetUserToken ()
{
	var encoding = new System.Text.UTF8Encoding();
	var postHeader = new Hashtable();
	
	var xmlPostData = "<?xml version=\"1.0\" encoding=\"utf-8\"?>" + 
	"<soap:Envelope xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" xmlns:xsd=\"http://www.w3.org/2001/XMLSchema\" xmlns:soap=\"http://schemas.xmlsoap.org/soap/envelope/\">" + 
	  "<soap:Body>" +
	    "<GetUserToken xmlns=\"http://ws.historicaloptiondata.com/\">" +
	      "<LogonId>" + userName + "</LogonId>"+
	      "<Password>" + password + "</Password>" +
	    "</GetUserToken>" +
	  "</soap:Body>" +
	"</soap:Envelope>";
	
	postHeader.Add("Content-Type", "text/xml");
	postHeader.Add("Content-Length", xmlPostData.Length); 
	postHeader.Add("SOAPAction", "http://" + HOSTADDRESS + "/GetUserToken");

	return new WWW(HOSTADDRESS, encoding.GetBytes(xmlPostData), postHeader);
	
}
6

This manual page explains how to access the log files when using a webplayer.

7

I talked to a fellow programmer and he mentioned to me where to find it in the Console logs. the error I was receiving was:

You are trying to load data from a www stream which had the following error when downloading.
Failed downloading ws.historicaloptiondata.com
UnityEngine.WWW:get_data()
UnityEngine.WWW:get_data()

not too descriptive. I wasn’t sure if there is some sort of security issues I have to disable to allow data streams or something. or if there is something the website would need to change on their end to allow website streaming data.