URLLoader and HttpServletRequest with POST method: flex, java, urlloader, httpservletrequest, post, actionscript, tomcat, ssl

by: lexxwernPosted on 2009-04-16 at 00:34:19ID: 24155204

Try this:

var sendData:Object = new Object;
sendData.command = 'logIn';
sendData.user = user;
sendData.pw = password;
var vars:URLVariables = new URLVariables(sendData);
var request:URLRequest = new URLRequest();
request.url = getBaseURL()+"ui";
request.method = URLRequestMethod.POST;
request.data = vars;
userLoader = new URLLoader();
userLoader.dataFormat = URLLoaderDataFormat.VARIABLES;
userLoader.load(request);
userLoader.addEventListener(IOErrorEvent.IO_ERROR, errorHandler);
userLoader.addEventListener(Event.COMPLETE, handleLogin);

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by: palehosePosted on 2009-04-16 at 00:46:30ID: 24155252

Thanks for the quick response, however, a couple of things:

1)The URLVariables constructor takes a String.
2)Regardless, the problem is not storing the data on the client, it's receiving it at the servlet. I've checked to make sure that request has the correct data, and it does. The servlet is not getting the variables.

by: lexxwernPosted on 2009-04-16 at 00:51:13ID: 24155276

Oh I am sorry... try this:

var sendData:Object = new Object;
sendData.command = 'logIn';
sendData.user = user;
sendData.pw = password;
var request:URLRequest = new URLRequest();
request.url = getBaseURL()+"ui";
request.method = URLRequestMethod.POST;
request.data = sendData;
userLoader = new URLLoader();
userLoader.dataFormat = URLLoaderDataFormat.VARIABLES;
userLoader.load(request);
userLoader.addEventListener(IOErrorEvent.IO_ERROR, errorHandler);
userLoader.addEventListener(Event.COMPLETE, handleLogin);

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by: palehosePosted on 2009-04-16 at 01:00:30ID: 24155320

Again, this does the same thing I was already doing. The problem is not storing the data, that's fine. It has to be on the other end because the method works perfectly fine with GET.

by: lexxwernPosted on 2009-04-16 at 01:06:46ID: 24155346

Did you check if it worked or not?

Sending the data as aa URLVariable (i.e. euphemism for query string) will never work for the POST method so the way data is sent needs to be modified.

by: palehosePosted on 2009-04-16 at 01:15:20ID: 24155381

Sorry, I'm new to this, I did not know that. I did try it and I'm getting the same results (nothing on the other end). Is there another way to send the data?

by: lexxwernPosted on 2009-04-16 at 01:20:05ID: 24155409

Can you show me the JSP code for reading the POST variable as well?

Also, you should consider using HTTPServices in Flex. Sending POST data should be very easy thru that.

Here's a code sample:

<?xml version="1.0" encoding="utf-8"?>
 
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute"
xmlns="*" creationComplete="send_data()">
 
    <mx:Script>
        <![CDATA[
            private function send_data():void {
                userRequest.send();
            }
        ]]>
    </mx:Script>
 
    <mx:Form x="22" y="10" width="493">
        <mx:HBox>
            <mx:Label text="Username"/>
            <mx:TextInput id="username"/>
        </mx:HBox>
        <mx:HBox>
            <mx:Label text="Email Address"/>
            <mx:TextInput id="emailaddress"/>
        </mx:HBox>
        <mx:Button label="Submit" click="send_data()"/>
    </mx:Form>
 
    <mx:DataGrid id="dgUserRequest" x="22" y="128" dataProvider="{userRequest.lastResult.users.user}">
        <mx:columns>
            <mx:DataGridColumn headerText="User ID" dataField="userid"/>
            <mx:DataGridColumn headerText="User Name" dataField="username"/>
        </mx:columns>
    </mx:DataGrid>
 
    <mx:TextInput x="22" y="292" id="selectedemailaddress"
        text="{dgUserRequest.selectedItem.emailaddress}"/>
 
    <mx:HTTPService id="userRequest" url="http://localhost/myproj/request_post2.php" useProxy="false" method="POST">
        <mx:request xmlns="">
            <username>{username.text}</username>
            <emailaddress>{emailaddress.text}</emailaddress>
        </mx:request>
    </mx:HTTPService>
 
</mx:Application>

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by: palehosePosted on 2009-04-16 at 01:40:06ID: 24155525

Here's my doPost function. As for using HTTPService, all I'm getting is a parse error when I try to use it.

public void doPost(HttpServletRequest request,
                      HttpServletResponse response)
        throws IOException, ServletException
{
	try {
		Class.forName("com.mysql.jdbc.Driver");
		con = DriverManager.getConnection(url, "root", "");
		stmt = con.createStatement();
		
		PrintWriter out = response.getWriter();
		BufferedReader reader = request.getReader();
		
		Enumeration e = request.getHeaderNames();
		while(e.hasMoreElements()) {
			String s = (String) e.nextElement();
			System.out.println(s + ": " + request.getHeader(s));
		}
	
		String command = request.getParameter("command");
		//String user = request.getParameter("user");
 
		System.out.println("POST command: "+command);
		//System.out.println("user: "+user);
 
		if (command==null) {
		// No command
		response.setContentType("text/html");
		out.println("<body>");
		out.println("No command <p>");
		out.println("</body>");
		return;
		}
		
		if(command.equals("logIn")) {
			String username = request.getParameter("user");
			String password = request.getParameter("pw");
			String uid = "";
			
			System.out.println(username);
			System.out.println(password);
			
			String query = "SELECT * FROM users WHERE username='" + username + "'";
			ResultSet rs = stmt.executeQuery(query);
 
			while(rs.next()) {
				System.out.println(rs.getString("password"));
				if(password.equals(rs.getString("password"))) {
					uid = rs.getString("userid");
				}
			}
			
			out.println(uid);
			
		} 
		stmt.close();
		con.close();
	} catch(Exception e) {
		e.printStackTrace();
	}
}

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by: palehosePosted on 2009-04-16 at 13:32:28ID: 24162281

So the header does include the Object.

From the header:
Referer: https://localhost:8443/app/app.swf
Content-type: application/x-www-form-urlencoded
Content-length: 15

[object Object]

I don't think it should be sent with that content type, so it sends the Object and not that string. What content type should it be using, so I can just read the bytes?

by: lexxwernPosted on 2009-04-16 at 21:23:54ID: 24164896

Content type looks fine to me.

Did you include you form input valus as an object as the HTTPService.request object?

by: palehosePosted on 2009-04-16 at 21:29:29ID: 24164919

I ended up just sending some XML code and parsing it on the other end. I think it has something to do with the Java, and I don't really have the time to figure it out, unfortunately.

Thanks for the help, I'll give you the points anyway.

by: lexxwernPosted on 2009-04-16 at 21:34:46ID: 24164943

Ok.. I understand your time constraints..

Question

URLLoader and HttpServletRequest with POST method

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