java - Play Framework 2.0 : "Errorjava. lang.RuntimeException : org. xml.sax.SAXParseException；行号:1；列数:1；文件过早结束

Question

XML 模板:

@(product: models.Product, productComponents: List[models.ProductComponent])
<product>
  <name>@product.name</name>
  <tomcatLocation>@product.tomcatLocation</tomcatLocation>
  <productComponents>
    @for(productComponent <- productComponents) {
     <component>
       <name>@productComponent.name</name>
       <packageName>@productComponent.packageName</packageName>
       <buildPath>@productComponent.buildPath</buildPath>
       <packageFormat>@productComponent.packageFormat</packageFormat>
       <versionAction>@productComponent.versionAction</versionAction>
       <versionFilePath>@productComponent.versionFilePath</versionFilePath>
       <versionCommand>@productComponent.versionCommand</versionCommand>
     </component>
    }
  </productComponents>
</product>

Controller Action :

public static Result upgradeProduct(String serverId, String productId) throws InterruptedException
  {
      models.Server server = models.Server.retrieveById(Long.parseLong(serverId));
      models.Product product = models.Product.retrieveById(Long.parseLong(productId));

      List<models.ProductComponent> productComponents = 
              models.ProductComponent.retrieveByProductId(Long.parseLong(productId));

      Xml renderedXmlPage = upgradeService.render(product, productComponents);

      Promise<WS.Response> upgradeStatus = 
              WS.url("http://" + server.hostIp + ":8085/upgradeProduct").setHeader("Content-Type", "text/xml").post(
                      renderedXmlPage.toString());

      String testMessage = upgradeStatus.get().getBody();

      return TODO;
  }

网络服务:

public static Result upgradeProduct()
{
  return async( WS.url(MAIN_URL).get().map(
          new Function<WS.Response, Result>() {
            public Result apply(WS.Response response)
            {
                try
                {
                    Document doc = response.asXml();
                    return ok("I WORKED");
                }
                catch(RuntimeException e)
                {
                    return ok("Error" + e.getMessage()+ "\n");
                }

            }
          })
        );
}

当我运行此操作时，抛出以下运行时异常

"Errorjava.lang.RuntimeException: org.xml.sax.SAXParseException; lineNumber: 1; columnNumber: 1; Premature end of file.".

此异常在“文档 doc = response.asXml();”处被抛出。我不知道为什么会这样？非常感谢任何帮助!

Stack Trace: 
play.libs.WS$Response.asXml(WS.java:332)
controllers.Service$1.apply(Service.java:40)
controllers.Service$1.apply(Service.java:35)
play.libs.F$Promise$2.apply(F.java:111)
play.api.libs.concurrent.STMPromise$$anonfun$map$1$$anonfun$apply$9.apply(Promise.scala:185)
scala.util.control.Exception$Catch$$anonfun$either$1.apply(Exception.scala:110)
scala.util.control.Exception$Catch$$anonfun$either$1.apply(Exception.scala:110)
scala.util.control.Exception$Catch.apply(Exception.scala:88)
scala.util.control.Exception$Catch.either(Exception.scala:110)
play.api.libs.concurrent.STMPromise.redeem(Promise.scala:166)
play.api.libs.concurrent.STMPromise$$anonfun$map$1.apply(Promise.scala:185)
play.api.libs.concurrent.STMPromise$$anonfun$map$1.apply(Promise.scala:184)
play.api.libs.concurrent.STMPromise$PromiseInvoker$$anonfun$receive$1.apply(Promise.scala:10    4)
play.api.libs.concurrent.STMPromise$PromiseInvoker$$anonfun$receive$1.apply(Promise.scala:10    3)
akka.actor.Actor$class.apply(Actor.scala:290)
play.api.libs.concurrent.STMPromise$PromiseInvoker.apply(Promise.scala:101)
akka.actor.ActorCell.invoke(ActorCell.scala:617)
akka.dispatch.Mailbox.processMailbox(Mailbox.scala:179)
akka.dispatch.Mailbox.run(Mailbox.scala:161)
akka.dispatch.ForkJoinExecutorConfigurator$MailboxExecutionTask.exec(AbstractDispatcher.scala:505)
akka.jsr166y.ForkJoinTask.doExec(ForkJoinTask.java:259)
akka.jsr166y.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:997)
akka.jsr166y.ForkJoinPool.runWorker(ForkJoinPool.java:1495)
akka.jsr166y.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:104)

Answer 1

如果我错了请更正我，但看起来您并没有从服务返回您的 xml 文档!？相反，您返回“I WORKED”，这将导致无法解析为 xml，解析器将抛出异常。