jQuery Ajax 调用 Twitter Finagle 服务器

Question

我正在努力获取从网页发送到我的服务器的 JSON 字符串。

在网页中，我执行以下操作:

  $.ajax({
     type: "POST",
     url: url,
     data: JSON.stringify(formData),
     contentType: "application/json; charset=utf-8",
     dataType: "json",
     success: function(msg) {
       // TODO: Listen for server ok.
       alert(msg);
       }

在服务器端，我的 Scala 代码如下所示:

import com.twitter.finagle.Service
import com.twitter.finagle.builder.Server
import com.twitter.finagle.builder.ServerBuilder
import com.twitter.finagle.http._
import com.twitter.util.Future
import java.lang.String
import java.net.InetSocketAddress
import org.jboss.netty.buffer.ChannelBuffers
import org.jboss.netty.util.CharsetUtil.UTF_8

/**
 *
 */
object HttpServerExample {
  def main(args: Array[String]) {

    class EchoService extends Service[Request, Response] {
      def apply(request: Request) = {
        println(request.getContent());

        val response = Response()
        response.setContentType(MediaType.Html, UTF_8.name)
        val responseContent: String = "Thanks"
        response.setContent(ChannelBuffers.copiedBuffer(responseContent, UTF_8))
        Future.value(response)
      }
    }

    val echoServer: Server = ServerBuilder()
      .codec(RichHttp[Request](Http()))
      .bindTo(new InetSocketAddress("127.0.0.1",8080))
      .name("EchoServer")
      .build(new EchoService())

   }
}

由于某种原因，请求内容为空。

如果我将 ajax 调用更改为:

 $.ajax({
     type: "POST",
     url: url,
     data: formData,
      success: function(msg) {
       // TODO: Listen for server ok.
       alert(msg);
       }

然后我就可以获取数据作为参数。

如何获取服务器上的 JSON 字符串？是我发送错误还是接收错误？

Answer 1

而不是:

 $.ajax({
     type: "POST",
     url: url,
     data: JSON.stringify(formData),
     contentType: "application/json; charset=utf-8",
     dataType: "json",
     success: function(msg) {
       // TODO: Listen for server ok.
       alert(msg);
       }

我现在使用的是:

   $.post(url,
      JSON.stringify(formData),
      function(msg) {
         // TODO: Listen for server ok. If this is successfull.... clear the form
         alert(msg);
      },
      "json");