无法使用 scala-play 发布请求在文本区域内获取表单数据

Question

我有一个表格，里面有一个文本区域：

<form action='postCode' method='post' id="code">
<fieldset>
  <legend>Integrated Development Environment</legend>
  <p>Write your assembly code here then hit the compile button.</p>
  <p>If there are errors it will return them; if not it will send you a file.</p>
  <textarea id="example_1" style="height: 550px; width: 99%;" name="asmCode" form="code">
    // This is an IDE (Integrated Development Environment) for the EV3 robot's assembly language.


    vmthread main {
      // Put code inside here

      // This is an example:

      DATA16 C4
      MOVE16_16(262,C4)
      SOUND(TONE,50,C4,300)
      SOUND_READY
    }
  </textarea>

  <br>
  <p>Commands:
    <input type='submit' value='Compile' />
    <input type='button' value='Get Binary' />
  </p>
</fieldset>
</form>

而且我正在尝试使用发布请求从用户那里获取输入，但是每当我尝试这样做时，我只会在 textarea 中获取文本。 我的 controller 看起来像这样：

import javax.inject._
import play.api._
import play.api.mvc._

import akka.stream.Materializer
import akka.stream.scaladsl.Source
import play.api.http.ContentTypes
import play.api.libs.Comet
import play.api.libs.json._

import scala.sys.process._
import java.io._
import scala.language.postfixOps

/**
 * This controller creates an `Action` to handle HTTP requests to the
 * application's home page.
 */
@Singleton
class HomeController @Inject()(val controllerComponents: ControllerComponents) extends BaseController {

  /**
   * Create an Action to render an HTML page.
   *
   * The configuration in the `routes` file means that this method
   * will be called when the application receives a `GET` request with
   * a path of `/`.
   */
  def index() = Action { implicit request: Request[AnyContent] =>
    Ok(views.html.index())
  }

  def getCode() = Action { request =>
    var code = request.body.asFormUrlEncoded

    code.map { args =>
      val code = args("asmCode").head
      val pw = new PrintWriter(new File("asm.lms"))
      pw.write(code)
      // if(("java -jar assembler.jar asm"!!).length() > 30) {
      //   if (("java -jar assembler.jar asm"!!).substring(0,30).contains("bytes")) {
      //     println("Yeah")
      //   }
      // } else if (("java -jar assembler.jar asm"!!).contains("bytes")) {
      //     println("Yeah")
      // } else {
      //   println("no")
      // }
      println("java -jar assembler.jar asm"!!)

      if(("java -jar assembler.jar asm"!!).length() > 10){
        println("java -jar assembler.jar asm"!!)
      }
    }.getOrElse(Ok("An unknown error has occured. Whoops!"))
    Ok("")
  }
}

我的路线文件如下所示：

GET     /                           controllers.HomeController.index()
+ nocsrf
POST    /postCode                   controllers.HomeController.getCode()
GET     /assets/*file               controllers.Assets.versioned(path="/public", file: Asset)

我只是想在 textarea 中获取表单数据，但即使在我在 web 页面中发送之前编辑 textarea 的内容之后，它也总是发送相同的内容。

Answer 1

糟糕，我的打印到文件 function 无法正常工作。