Servlets 如何在Scalatra Servlet中获取请求参数？_Servlets_Scalatra

Servlets 如何在Scalatra Servlet中获取请求参数？

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Servlets 如何在Scalatra Servlet中获取请求参数？,servlets,scalatra,Servlets,Scalatra,我目前有一个工作的Scalactraservlet class MyScalatraServlet extends MyScalatraWebAppStack { get("/") { response.getWriter().println("Test") val scDate = com.example.app.ScalaDate.printDate() response.getWriter().println(scDate) val c

我目前有一个工作的Scalactraservlet

class MyScalatraServlet extends MyScalatraWebAppStack {
   get("/") {
      response.getWriter().println("Test")
      val scDate = com.example.app.ScalaDate.printDate()
      response.getWriter().println(scDate)
      val cmd = "spark-submit --jars /home/cloudera/Desktop/SparkDisc/lib/DME.jar/..../discovery_2.10-1.0.jar hdfs:/user/cloudera/sample0.txt"//hard coded file path
      val output = cmd.!! // Captures the output
      response.getWriter().println(output)
   }
}

文件路径当前是硬编码的。我可以做些什么来允许用户输入filepath参数吗？非常感谢您的帮助

使用GET或POST，您可以输入参数，如下所示：

import org.scalatra._
import scalate.ScalateSupport
import com.google.gson.Gson
import java.util.concurrent.TimeUnit
import java.util.Date

class Queue(var id: String, var act: String, var waitSec: Int) {
  override def toString = id + ", " + act + ", " + waitSec.toString
}

class MyScalatraServlet extends ScalatraServlet with ScalateSupport {

  get("/hello/:query") {
    <html>
      <body>
        <pre>
          {params("query")}
        </pre>
      </body>
    </html>
  }

  post("/hello") {

    println("A request comes: " + "%tF %<tT" format new Date)

    val jsonString = request.body
    try {
      val gson = new Gson
      val queue = gson.fromJson(jsonString, classOf[Queue])
      // for debugging
      println("Your name: " + queue)

      if (queue.act.equals("stop")) {
        println("Wait for: " + queue.waitSec.toString)
        TimeUnit.SECONDS.sleep(queue.waitSec)
      }

      response.addHeader("ACK", "GOT IT")
    } catch {
      case e: Exception =>
        e.printStackTrace
        response.addHeader("ACK", "BOOM!")
    }
  }

  notFound {
    // Try to render a ScalateTemplate if no route matched
    findTemplate(requestPath) map { path =>
      contentType = "text/html"
      layoutTemplate(path)
    } orElse serveStaticResource() getOrElse resourceNotFound()
  }
}

Exec curl如下所示：

例如，您可以替换filepath的JSON键和值。

使用GET或POST，您可以输入参数，如下所示：

import org.scalatra._
import scalate.ScalateSupport
import com.google.gson.Gson
import java.util.concurrent.TimeUnit
import java.util.Date

class Queue(var id: String, var act: String, var waitSec: Int) {
  override def toString = id + ", " + act + ", " + waitSec.toString
}

class MyScalatraServlet extends ScalatraServlet with ScalateSupport {

  get("/hello/:query") {
    <html>
      <body>
        <pre>
          {params("query")}
        </pre>
      </body>
    </html>
  }

  post("/hello") {

    println("A request comes: " + "%tF %<tT" format new Date)

    val jsonString = request.body
    try {
      val gson = new Gson
      val queue = gson.fromJson(jsonString, classOf[Queue])
      // for debugging
      println("Your name: " + queue)

      if (queue.act.equals("stop")) {
        println("Wait for: " + queue.waitSec.toString)
        TimeUnit.SECONDS.sleep(queue.waitSec)
      }

      response.addHeader("ACK", "GOT IT")
    } catch {
      case e: Exception =>
        e.printStackTrace
        response.addHeader("ACK", "BOOM!")
    }
  }

  notFound {
    // Try to render a ScalateTemplate if no route matched
    findTemplate(requestPath) map { path =>
      contentType = "text/html"
      layoutTemplate(path)
    } orElse serveStaticResource() getOrElse resourceNotFound()
  }
}

Exec curl如下所示：

例如，您可以替换filepath的JSON键和值。

使用GET或POST，您可以输入参数，如下所示：

import org.scalatra._
import scalate.ScalateSupport
import com.google.gson.Gson
import java.util.concurrent.TimeUnit
import java.util.Date

class Queue(var id: String, var act: String, var waitSec: Int) {
  override def toString = id + ", " + act + ", " + waitSec.toString
}

class MyScalatraServlet extends ScalatraServlet with ScalateSupport {

  get("/hello/:query") {
    <html>
      <body>
        <pre>
          {params("query")}
        </pre>
      </body>
    </html>
  }

  post("/hello") {

    println("A request comes: " + "%tF %<tT" format new Date)

    val jsonString = request.body
    try {
      val gson = new Gson
      val queue = gson.fromJson(jsonString, classOf[Queue])
      // for debugging
      println("Your name: " + queue)

      if (queue.act.equals("stop")) {
        println("Wait for: " + queue.waitSec.toString)
        TimeUnit.SECONDS.sleep(queue.waitSec)
      }

      response.addHeader("ACK", "GOT IT")
    } catch {
      case e: Exception =>
        e.printStackTrace
        response.addHeader("ACK", "BOOM!")
    }
  }

  notFound {
    // Try to render a ScalateTemplate if no route matched
    findTemplate(requestPath) map { path =>
      contentType = "text/html"
      layoutTemplate(path)
    } orElse serveStaticResource() getOrElse resourceNotFound()
  }
}

Exec curl如下所示：

例如，您可以替换filepath的JSON键和值。

使用GET或POST，您可以输入参数，如下所示：

import org.scalatra._
import scalate.ScalateSupport
import com.google.gson.Gson
import java.util.concurrent.TimeUnit
import java.util.Date

class Queue(var id: String, var act: String, var waitSec: Int) {
  override def toString = id + ", " + act + ", " + waitSec.toString
}

class MyScalatraServlet extends ScalatraServlet with ScalateSupport {

  get("/hello/:query") {
    <html>
      <body>
        <pre>
          {params("query")}
        </pre>
      </body>
    </html>
  }

  post("/hello") {

    println("A request comes: " + "%tF %<tT" format new Date)

    val jsonString = request.body
    try {
      val gson = new Gson
      val queue = gson.fromJson(jsonString, classOf[Queue])
      // for debugging
      println("Your name: " + queue)

      if (queue.act.equals("stop")) {
        println("Wait for: " + queue.waitSec.toString)
        TimeUnit.SECONDS.sleep(queue.waitSec)
      }

      response.addHeader("ACK", "GOT IT")
    } catch {
      case e: Exception =>
        e.printStackTrace
        response.addHeader("ACK", "BOOM!")
    }
  }

  notFound {
    // Try to render a ScalateTemplate if no route matched
    findTemplate(requestPath) map { path =>
      contentType = "text/html"
      layoutTemplate(path)
    } orElse serveStaticResource() getOrElse resourceNotFound()
  }
}

Exec curl如下所示：

例如，您可以替换filepath的JSON键和值