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我想在远程Linux服务器上设置一个播放框架。在POST请求服务器错误'播放框架2.4.3'
- 服务器：Linux操作系统Ubuntu 14.04
- Framwork：播放2.4.3
- 数据库：的Postgres 9.3.11
- 应用：Android手机
- 本地PC： Windows 8.1
我在本地PC上开发了后端，一切都像魅力一样，当我在路由器中打开端口9000时，我可以通过移动应用程序访问后端。
“这接缝大，什么这个帅哥那么问题？'”
嗯，我真的想用我的本地PC主办这个后端，所以我租了一个服务器上运行Linux操作系统。
我然后就到后台上传到服务器，创建相同的登录凭据，以数据库为本地，下载的Java 1.8，并的Postgres 9.3
我解雇了在服务器后端，和一切似乎都好。我可以输入http://serverip:9000，我可以看到与本地相同的主页。 到目前为止，如此好的。
然后我试图通过一个POST请求表单添加一个人到数据库，这也在本地PC上工作。
当我在服务器上提交相同的表单时，我重定向到主页面，就像本地一样，但是当我查看serverlog时，它说它向数据库添加了“null”。
好吧，我想，奇怪的是，我开始在数据库中手动添加一些人。我正在使用coffeescript在主页面（索引）中显示数据库中的所有人员列表。
在添加一些手动数据并从数据库中删除空对象后，该脚本正确地在主页面上列出了数据库中的人员。
这使我相信该程序实际上与数据库建立连接，并可以从中获取内容，为什么它不能插入？我也注意到GET请求可以工作，但POST请求不能。
我调查了一些，我做了一个getPerson（）函数，这是一个post请求，是的 - 从数据库中获取一个人。我制作一个表单，并尝试查看服务器是否可以从数据库中获得一个人。在浏览器窗口中，我现在收到错误消息。
Ok wtf ??然后我继续查看serverlog，而不是我的surprice，有关于HttpErrorHandlerExceptions的大量错误消息？
似乎所有的GET请求都在服务器上工作，但所有POST请求都没有。
有没有人知道该怎么做？我在这里亏本，我找不到任何类似的问题。请记住，这在我的个人电脑本地运行非常好，当我播放我自己的Windows PC时。看起来好像这里还有一个linux问题呢？
浏览器的错误信息
Execution exception
[NullPointerException: null]
In /home/kristian/Backend/target/scala-2.10/routes/main/router/Routes.scala:347
344 // @LINE:9
345 case controllers_Application_getPerson3_route(params) =>
346 call {
347 controllers_Application_getPerson3_invoker.call(Application_1.getPerson())
348 }
349
350 // @LINE:10
351 case controllers_Application_getPersons4_route(params) =>
352 call {
服务器后端登录
[error] - play.core.server.netty.PlayDefaultUpstreamHandler - Cannot invoke the action
java.lang.NullPointerException: null
at controllers.Application.getPerson(Application.java:52) ~[classes/:na]
at router.Routes$$anonfun$routes$1$$anonfun$applyOrElse$4$$anonfun$apply$4.apply(Routes.scala:347) ~[classes/:na]
at router.Routes$$anonfun$routes$1$$anonfun$applyOrElse$4$$anonfun$apply$4.apply(Routes.scala:347) ~[classes/:na]
at play.core.routing.HandlerInvokerFactory$$anon$4.resultCall(HandlerInvoker.scala:136) ~[play_2.10-2.4.3.jar:2.4.3]
at play.core.routing.HandlerInvokerFactory$JavaActionInvokerFactory$$anon$14$$anon$3$$anon$1.invocation(HandlerInvoker.scala:127) ~[play_2.10-2.4.3.jar:2.4.3]
at play.core.j.JavaAction$$anon$1.call(JavaAction.scala:70) ~[play_2.10-2.4.3.jar:2.4.3]
at play.http.DefaultHttpRequestHandler$1.call(DefaultHttpRequestHandler.java:20) ~[play_2.10-2.4.3.jar:2.4.3]
at play.db.jpa.TransactionalAction.lambda$call$5(TransactionalAction.java:19) ~[play-java-jpa_2.10-2.4.3.jar:2.4.3]
at play.db.jpa.DefaultJPAApi.withTransaction(DefaultJPAApi.java:136) ~[play-java-jpa_2.10-2.4.3.jar:2.4.3]
at play.db.jpa.JPA.withTransaction(JPA.java:159) ~[play-java-jpa_2.10-2.4.3.jar:2.4.3]
at play.db.jpa.TransactionalAction.call(TransactionalAction.java:16) ~[play-java-jpa_2.10-2.4.3.jar:2.4.3]
at play.core.j.JavaAction$$anonfun$7.apply(JavaAction.scala:94) ~[play_2.10-2.4.3.jar:2.4.3]
at play.core.j.JavaAction$$anonfun$7.apply(JavaAction.scala:94) ~[play_2.10-2.4.3.jar:2.4.3]
at scala.concurrent.impl.Future$PromiseCompletingRunnable.liftedTree1$1(Future.scala:24) ~[scala-library-2.10.5.jar:na]
at scala.concurrent.impl.Future$PromiseCompletingRunnable.run(Future.scala:24) ~[scala-library-2.10.5.jar:na]
at play.core.j.HttpExecutionContext$$anon$2.run(HttpExecutionContext.scala:40) ~[play_2.10-2.4.3.jar:2.4.3]
at play.api.libs.iteratee.Execution$trampoline$.execute(Execution.scala:70) ~[play-iteratees_2.10-2.4.3.jar:2.4.3]
at play.core.j.HttpExecutionContext.execute(HttpExecutionContext.scala:32) ~[play_2.10-2.4.3.jar:2.4.3]
at scala.concurrent.impl.Future$.apply(Future.scala:31) ~[scala-library-2.10.5.jar:na]
at scala.concurrent.Future$.apply(Future.scala:485) ~[scala-library-2.10.5.jar:na]
at play.core.j.JavaAction.apply(JavaAction.scala:94) ~[play_2.10-2.4.3.jar:2.4.3]
at play.api.mvc.Action$$anonfun$apply$1$$anonfun$apply$4$$anonfun$apply$5.apply(Action.scala:105) ~[play_2.10-2.4.3.jar:2.4.3]
at play.api.mvc.Action$$anonfun$apply$1$$anonfun$apply$4$$anonfun$apply$5.apply(Action.scala:105) ~[play_2.10-2.4.3.jar:2.4.3]
at play.utils.Threads$.withContextClassLoader(Threads.scala:21) ~[play_2.10-2.4.3.jar:2.4.3]
at play.api.mvc.Action$$anonfun$apply$1$$anonfun$apply$4.apply(Action.scala:104) ~[play_2.10-2.4.3.jar:2.4.3]
at play.api.mvc.Action$$anonfun$apply$1$$anonfun$apply$4.apply(Action.scala:103) ~[play_2.10-2.4.3.jar:2.4.3]
at scala.Option.map(Option.scala:145) ~[scala-library-2.10.5.jar:na]
at play.api.mvc.Action$$anonfun$apply$1.apply(Action.scala:103) ~[play_2.10-2.4.3.jar:2.4.3]
at play.api.mvc.Action$$anonfun$apply$1.apply(Action.scala:96) ~[play_2.10-2.4.3.jar:2.4.3]
at play.api.libs.iteratee.Iteratee$$anonfun$mapM$1.apply(Iteratee.scala:524) ~[play-iteratees_2.10-2.4.3.jar:2.4.3]
at play.api.libs.iteratee.Iteratee$$anonfun$mapM$1.apply(Iteratee.scala:524) ~[play-iteratees_2.10-2.4.3.jar:2.4.3]
at play.api.libs.iteratee.Iteratee$$anonfun$flatMapM$1.apply(Iteratee.scala:560) ~[play-iteratees_2.10-2.4.3.jar:2.4.3]
at play.api.libs.iteratee.Iteratee$$anonfun$flatMapM$1.apply(Iteratee.scala:560) ~[play-iteratees_2.10-2.4.3.jar:2.4.3]
at play.api.libs.iteratee.Iteratee$$anonfun$flatMap$1$$anonfun$apply$14.apply(Iteratee.scala:537) ~[play-iteratees_2.10-2.4.3.jar:2.4.3]
at play.api.libs.iteratee.Iteratee$$anonfun$flatMap$1$$anonfun$apply$14.apply(Iteratee.scala:537) ~[play-iteratees_2.10-2.4.3.jar:2.4.3]
at scala.concurrent.impl.Future$PromiseCompletingRunnable.liftedTree1$1(Future.scala:24) ~[scala-library-2.10.5.jar:na]
at scala.concurrent.impl.Future$PromiseCompletingRunnable.run(Future.scala:24) ~[scala-library-2.10.5.jar:na]
at akka.dispatch.TaskInvocation.run(AbstractDispatcher.scala:40) [akka-actor_2.10-2.3.13.jar:na]
at akka.dispatch.ForkJoinExecutorConfigurator$AkkaForkJoinTask.exec(AbstractDispatcher.scala:397) [akka-actor_2.10-2.3.13.jar:na]
at scala.concurrent.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260) [scala-library-2.10.5.jar:na]
at scala.concurrent.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1339) [scala-library-2.10.5.jar:na]
at scala.concurrent.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979) [scala-library-2.10.5.jar:na]
at scala.concurrent.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107) [scala-library-2.10.5.jar:na]
[error] - application -
! @6phn3n8in - Internal server error, for (POST) [/foundperson] ->
play.api.http.HttpErrorHandlerExceptions$$anon$1: Execution exception[[NullPointerException: null]]
at play.api.http.HttpErrorHandlerExceptions$.throwableToUsefulException(HttpErrorHandler.scala:265) ~[play_2.10-2.4.3.jar:2.4.3]
at play.api.http.DefaultHttpErrorHandler.onServerError(HttpErrorHandler.scala:191) ~[play_2.10-2.4.3.jar:2.4.3]
at play.api.GlobalSettings$class.onError(GlobalSettings.scala:179) [play_2.10-2.4.3.jar:2.4.3]
at play.api.DefaultGlobal$.onError(GlobalSettings.scala:212) [play_2.10-2.4.3.jar:2.4.3]
at play.api.http.GlobalSettingsHttpErrorHandler.onServerError(HttpErrorHandler.scala:94) [play_2.10-2.4.3.jar:2.4.3]
at play.core.server.netty.PlayDefaultUpstreamHandler$$anonfun$3.applyOrElse(PlayDefaultUpstreamHandler.scala:273) [play-netty-server_2.10-2.4.3.jar:2.4.3]
at play.core.server.netty.PlayDefaultUpstreamHandler$$anonfun$3.applyOrElse(PlayDefaultUpstreamHandler.scala:269) [play-netty-server_2.10-2.4.3.jar:2.4.3]
at scala.concurrent.Future$$anonfun$recoverWith$1.apply(Future.scala:344) [scala-library-2.10.5.jar:na]
at scala.concurrent.Future$$anonfun$recoverWith$1.apply(Future.scala:343) [scala-library-2.10.5.jar:na]
at scala.concurrent.impl.CallbackRunnable.run(Promise.scala:32) [scala-library-2.10.5.jar:na]
at play.api.libs.iteratee.Execution$trampoline$.executeScheduled(Execution.scala:109) [play-iteratees_2.10-2.4.3.jar:2.4.3]
at play.api.libs.iteratee.Execution$trampoline$.execute(Execution.scala:71) [play-iteratees_2.10-2.4.3.jar:2.4.3]
at scala.concurrent.impl.CallbackRunnable.executeWithValue(Promise.scala:40) [scala-library-2.10.5.jar:na]
at scala.concurrent.impl.Promise$DefaultPromise.tryComplete(Promise.scala:248) [scala-library-2.10.5.jar:na]
at scala.concurrent.Promise$class.complete(Promise.scala:55) [scala-library-2.10.5.jar:na]
at scala.concurrent.impl.Promise$DefaultPromise.complete(Promise.scala:153) [scala-library-2.10.5.jar:na]
at scala.concurrent.impl.Future$PromiseCompletingRunnable.run(Future.scala:23) [scala-library-2.10.5.jar:na]
at akka.dispatch.TaskInvocation.run(AbstractDispatcher.scala:40) [akka-actor_2.10-2.3.13.jar:na]
at akka.dispatch.ForkJoinExecutorConfigurator$AkkaForkJoinTask.exec(AbstractDispatcher.scala:397) [akka-actor_2.10-2.3.13.jar:na]
at scala.concurrent.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260) [scala-library-2.10.5.jar:na]
at scala.concurrent.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1339) [scala-library-2.10.5.jar:na]
at scala.concurrent.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979) [scala-library-2.10.5.jar:na]
at scala.concurrent.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107) [scala-library-2.10.5.jar:na]
Caused by: java.lang.NullPointerException: null
at controllers.Application.getPerson(Application.java:52) ~[classes/:na]
at router.Routes$$anonfun$routes$1$$anonfun$applyOrElse$4$$anonfun$apply$4.apply(Routes.scala:347) ~[classes/:na]
at router.Routes$$anonfun$routes$1$$anonfun$applyOrElse$4$$anonfun$apply$4.apply(Routes.scala:347) ~[classes/:na]
at play.core.routing.HandlerInvokerFactory$$anon$4.resultCall(HandlerInvoker.scala:136) ~[play_2.10-2.4.3.jar:2.4.3]
at play.core.routing.HandlerInvokerFactory$JavaActionInvokerFactory$$anon$14$$anon$3$$anon$1.invocation(HandlerInvoker.scala:127) ~[play_2.10-2.4.3.jar:2.4.3]
at play.core.j.JavaAction$$anon$1.call(JavaAction.scala:70) ~[play_2.10-2.4.3.jar:2.4.3]
at play.http.DefaultHttpRequestHandler$1.call(DefaultHttpRequestHandler.java:20) ~[play_2.10-2.4.3.jar:2.4.3]
at play.db.jpa.TransactionalAction.lambda$call$5(TransactionalAction.java:19) ~[play-java-jpa_2.10-2.4.3.jar:2.4.3]
at play.db.jpa.DefaultJPAApi.withTransaction(DefaultJPAApi.java:136) ~[play-java-jpa_2.10-2.4.3.jar:2.4.3]
at play.db.jpa.JPA.withTransaction(JPA.java:159) ~[play-java-jpa_2.10-2.4.3.jar:2.4.3]
at play.db.jpa.TransactionalAction.call(TransactionalAction.java:16) ~[play-java-jpa_2.10-2.4.3.jar:2.4.3]
at play.core.j.JavaAction$$anonfun$7.apply(JavaAction.scala:94) ~[play_2.10-2.4.3.jar:2.4.3]
at play.core.j.JavaAction$$anonfun$7.apply(JavaAction.scala:94) ~[play_2.10-2.4.3.jar:2.4.3]
at scala.concurrent.impl.Future$PromiseCompletingRunnable.liftedTree1$1(Future.scala:24) [scala-library-2.10.5.jar:na]
at scala.concurrent.impl.Future$PromiseCompletingRunnable.run(Future.scala:24) [scala-library-2.10.5.jar:na]
at play.core.j.HttpExecutionContext$$anon$2.run(HttpExecutionContext.scala:40) ~[play_2.10-2.4.3.jar:2.4.3]
at play.api.libs.iteratee.Execution$trampoline$.execute(Execution.scala:70) [play-iteratees_2.10-2.4.3.jar:2.4.3]
at play.core.j.HttpExecutionContext.execute(HttpExecutionContext.scala:32) ~[play_2.10-2.4.3.jar:2.4.3]
at scala.concurrent.impl.Future$.apply(Future.scala:31) ~[scala-library-2.10.5.jar:na]
at scala.concurrent.Future$.apply(Future.scala:485) ~[scala-library-2.10.5.jar:na]
at play.core.j.JavaAction.apply(JavaAction.scala:94) ~[play_2.10-2.4.3.jar:2.4.3]
at play.api.mvc.Action$$anonfun$apply$1$$anonfun$apply$4$$anonfun$apply$5.apply(Action.scala:105) ~[play_2.10-2.4.3.jar:2.4.3]
at play.api.mvc.Action$$anonfun$apply$1$$anonfun$apply$4$$anonfun$apply$5.apply(Action.scala:105) ~[play_2.10-2.4.3.jar:2.4.3]
at play.utils.Threads$.withContextClassLoader(Threads.scala:21) ~[play_2.10-2.4.3.jar:2.4.3]
at play.api.mvc.Action$$anonfun$apply$1$$anonfun$apply$4.apply(Action.scala:104) ~[play_2.10-2.4.3.jar:2.4.3]
at play.api.mvc.Action$$anonfun$apply$1$$anonfun$apply$4.apply(Action.scala:103) ~[play_2.10-2.4.3.jar:2.4.3]
at scala.Option.map(Option.scala:145) ~[scala-library-2.10.5.jar:na]
at play.api.mvc.Action$$anonfun$apply$1.apply(Action.scala:103) ~[play_2.10-2.4.3.jar:2.4.3]
at play.api.mvc.Action$$anonfun$apply$1.apply(Action.scala:96) ~[play_2.10-2.4.3.jar:2.4.3]
at play.api.libs.iteratee.Iteratee$$anonfun$mapM$1.apply(Iteratee.scala:524) ~[play-iteratees_2.10-2.4.3.jar:2.4.3]
at play.api.libs.iteratee.Iteratee$$anonfun$mapM$1.apply(Iteratee.scala:524) ~[play-iteratees_2.10-2.4.3.jar:2.4.3]
at play.api.libs.iteratee.Iteratee$$anonfun$flatMapM$1.apply(Iteratee.scala:560) ~[play-iteratees_2.10-2.4.3.jar:2.4.3]
at play.api.libs.iteratee.Iteratee$$anonfun$flatMapM$1.apply(Iteratee.scala:560) ~[play-iteratees_2.10-2.4.3.jar:2.4.3]
at play.api.libs.iteratee.Iteratee$$anonfun$flatMap$1$$anonfun$apply$14.apply(Iteratee.scala:537) ~[play-iteratees_2.10-2.4.3.jar:2.4.3]
at play.api.libs.iteratee.Iteratee$$anonfun$flatMap$1$$anonfun$apply$14.apply(Iteratee.scala:537) ~[play-iteratees_2.10-2.4.3.jar:2.4.3]
at scala.concurrent.impl.Future$PromiseCompletingRunnable.liftedTree1$1(Future.scala:24) [scala-library-2.10.5.jar:na]
at scala.concurrent.impl.Future$PromiseCompletingRunnable.run(Future.scala:24) [scala-library-2.10.5.jar:na]
... 6 common frames omitted
指数文件
<article>Insert to database/register:</article>
<form method="POST" action="@routes.Application.addPerson()">
<table>
<tr>
<td>
<article>Firstname</article>
</td>
<td>
<button>Add Person</button>
</td>
</tr>
</table>
</form>
<form method="POST" action="@routes.Application.getPerson()">
<article>Get person:</article>
<table>
<tr>
<td>
<article>Firstname</article>
</td>
</tr>
<tr>
<td>
<input type="text" name="firstname"/>
</td>
<td>
<button>Get person</button>
</td>
</tr>
</table>
个
的路由文件
# Routes
# This file defines all application routes (Higher priority routes first)
# ~~~~
# Home page
GET / controllers.Application.index()
POST /person controllers.Application.addPerson()
GET /persons controllers.Application.getPersons
# Map static resources from the /public folder to the /assets URL path
GET /assets/*file controllers.Assets.at(path="/public", file)
的addPerson的（）在应用文件
@Transactional
public Result addPerson() {
Person person = Form.form(Person.class).bindFromRequest().get();
JPA.em().persist(person);
return redirect(routes.Application.index());
}
@Transactional(readOnly = true)
public Result getPersons() {
List<Person> persons = (List<Person>) JPA.em().createQuery("select p from Person p").getResultList();
for(Person p : persons){
System.out.println("Success: " + p.firstname);
}
return ok(toJson(persons));
}
@Transactional(readOnly = true)
public Result getPerson() {
Person findPerson = Form.form(Person.class).bindFromRequest().get();
List<Person> persons = (List<Person>) JPA.em().createQuery("select p from Person p").getResultList();
for(Person p : persons){
if(p.firstname.equals(findPerson.firstname)) {
System.out.println("Success: " + p.firstname);
}
}
return ok(toJson(findPerson));
}
的的CoffeeScript
$ ->
$.get "/persons", (persons) ->
$.each persons, (index, person) ->
$("#persons").append $("<li>").text person.firstname