How to get the data from a "post" form?

Yao

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Jan 17, 2013, 6:18:03 PM1/17/13

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here is the html:

<!DOCTYPE html>
<html><head><title>Login Page</title></head>
<body>
    <form id='login' action='/login' method='post'>
        <fieldset >
            <legend>Login</legend>
            <input type='hidden' name='submitted' id='submitted' value='1'/>

            <label for='username' >UserName*:</label>
            <input type='text' name='username' id='username'  maxlength="50" />

            <label for='password' >Password*:</label>
            <input type='password' name='password' id='password' maxlength="50" />

            <input type='submit' name='Submit' value='Submit' />
        </fieldset>
    </form>
</body>
</html>

here is the java code:

public class Main extends Verticle
{
    @Override
    public void start() throws Exception
    {
        System.out.println("starting the vertx stuff");
        final String host = "localhost";
        final String port = "8181";

        Vertx vertx = Vertx.newVertx();
        HttpServer httpServer = vertx.createHttpServer();
...
        final String login = "/login";
...       
       
        httpServer.requestHandler(new Handler<HttpServerRequest>()
        {
            public void handle(HttpServerRequest req)
            {
                String path = req.path;

                /* start mapping of page urls*/
                // redirect user to the login page
...
                /* start mapping of form urls */
                // login
                else if (path.equals(login))
                {
                    mainLogin();
                    String username = req.params().get("username");
                    String password = req.params().get("password");
                    req.response.end("user=" + username + " password=" + password);
                }
...
        System.out.println("vertx listening to: " + host + " " + port);
        httpServer.listen(Integer.valueOf(port), host);
    }

Every time i enter username/password, they both come up as null. what am i doing wrong?

Yao

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Jan 17, 2013, 6:58:56 PM1/17/13

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http://stackoverflow.com/questions/14390322/how-to-get-post-form-data-using-vertx-handlers

same question in SO for readability.

Tim Fox

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Jan 18, 2013, 3:10:39 AM1/18/13

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It's a common misconception (mainly because other web frameworks blur the distinction) that form attributes somehow magically map to parameters of the request. This is not true when multipart form encoding is used.

Take a look at the formupload module for how to do this.

--

Yao

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Jan 18, 2013, 9:30:35 AM1/18/13

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Hi Tim,

I managed to find some snippets online and I could get the POST form parameters using this:

req.bodyHandler(new Handler<Buffer>()
        {
            @Override
            public void handle(Buffer buff)
            {
                String contentType = req.headers().get("Content-Type");
                if ("application/x-www-form-urlencoded".equals(contentType))
                {
                    QueryStringDecoder qsd = new QueryStringDecoder(buff.toString(), false);
                    Map<String, List<String>> params = qsd.getParameters();
                    System.out.println("inside getFormData() --> " + params);
                }
            }
        });

The problem I am stuck now at is that the handle function "void". I have several forms that requires these params to be returned, any advice?

Usually use Spring, first time with Vertx.

Tim Fox

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Jan 18, 2013, 10:17:40 AM1/18/13

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I definitely recommend using mod-formupload - it will handle this for you.

--

Yao Jiang

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Jan 18, 2013, 10:29:28 AM1/18/13

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alright, i will try that out. thanks!

> --
>
>

Paulo Lopes

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Jan 24, 2013, 3:42:20 AM1/24/13

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Hi,

I was playing with mod-formupload and it does not integrate "as good as it could" with Groovy, I would like to contribute to it and allow the usage of the groovy Closures instead of Handlers and use the Groovy Vertx and HttpRequest objects.

My question is, do you have any guidelines for this? Should i create a separate package for it and extend the original classes or can i just extend the mod classes to have matching method signatures that accept groovy Closures and Groovy Vertx/HttpRequest objects?