Question

我能够使用缓冲区处理程序获取表单数据，但它是一个void函数，我无法返回表单数据值。总共有大约4-7个表单，我不想一遍又一遍地编写相同的处理程序，因为默认函数是无效的。

HTML：

<!DOCTYPE html>
<html>    
<head><title>Login Page</title></head>
<body>
    <a href="/activateUserPage">activate user</a>
    <br/>
    <a href="/login">log in</a>
    <br/>

    <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>

的java：

import org.jboss.netty.handler.codec.http.QueryStringDecoder;
import org.vertx.java.core.Handler;
import org.vertx.java.core.Vertx;
import org.vertx.java.core.buffer.Buffer;
import org.vertx.java.core.http.HttpServer;
import org.vertx.java.core.http.HttpServerRequest;
import org.vertx.java.core.http.RouteMatcher;
import org.vertx.java.deploy.Verticle;

import java.util.Collection;
import java.util.List;
import java.util.Map;
import java.util.Set;

/**
 * Created by IntelliJ IDEA.
 * User: yao
 * Date: 1/17/13
 * Time: 2:22 PM
 */

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();

        ...

        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
                if (path.equals("/"))
                {
                    req.response.sendFile(dir + "html/loginPage.html");
                }
                ...

                /* end mapping of page urls*/

                /* start mapping of form urls */
                // login
                else if (path.equals(login))
                {
                    mainLogin();
                    getFormData(req);
                }
                ...

                /* end mapping of form urls */

                /* all other pages */
                else
                {
                    req.response.end("404 - page no exist");
                }
            }
        });

        System.out.println("vertx listening to: " + host + " " + port);
        httpServer.listen(Integer.valueOf(port), host);
    }

    ...

    private void getFormData(final HttpServerRequest req)
    {
        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(params);
                }
            }
        });
    }
}

Answer 1

现在BodyHandler由vertx提供，使用它将isExpectMultipart设置为true，您将能够读取表单属性

request.getFormAttribute("username");//to read input named username.

只需在实际处理程序之前添加此行：

router.route().handler(BodyHandler.create());

Answer 2

对于java，这非常有效：

request.expectMultiPart(true);
    request.endHandler(req->{
      String text = request.formAttributes().get("bigtext"); 
      //got it here
      //do something ...
 });

Answer 3

我到底做了什么基本上是这样的：

使用post进行ajax调用，表单中的数据需要序列化。

$.ajax
({
    type: "POST",
    url: "/login",
    data: $('#frm_login').serialize(),
    success: function(data)
...

在后端，vertx将此数据作为缓冲区接收。 rest是通过“＆amp;”拆分解析缓冲区和“=”。

Map<String, String> params = new HashMap<String, String>();
String[] paramSplits = buffer.toString().split("&");
String[] valueSplits;

if (paramSplits.length > 1)
{
    for (String param : paramSplits)
    {
        valueSplits = param.split("=");
        if (valueSplits.length > 1)
        {
            // add this check to handle empty phone number fields
            params.put(decode(valueSplits[0]), decode(valueSplits[1]));
        }
    }
}

希望这会对别人有所帮助！

Answer 4

这可以使用http请求上的formAttributes来完成。这是scala中的一个例子

  req.expectMultiPart(true) //Will expect a form
  req.endHandler({

    req.formAttributes() //This is used to access form attributes

    //some code with attributes

  })

参考：http://vertx.io/core_manual_java.html#handling-multipart-form-attributes

如何使用VERTX处理程序获取POST表单数据？

4 个答案: