com.twitter.server.handler.SummaryHandler.scala Maven / Gradle / Ivy

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package com.twitter.server.handler

import com.twitter.finagle.Service
import com.twitter.finagle.http.{Request, Response}
import com.twitter.io.Buf
import com.twitter.server.util.HttpUtils.{expectsHtml, newOk, newResponse}
import com.twitter.util.Future

private object SummaryHandler {
  val TextResponse = "Visit twitter-server's admin pages via browser for a richer experience."

  def render(
    finagleVersion: String,
    procInfo: Seq[String]
  ): String =
    s"""
      
      
        
          
          ${
            (for (key <- procInfo) yield {
              s"""
                    
                      ${key}:
                      ...
                      ·
                    
                  """
            }).mkString("\n")
          }
          Finagle Ver: ${finagleVersion}
        
      
      
      """
}

class SummaryHandler extends Service[Request, Response] {
  import SummaryHandler._

  override def apply(req: Request): Future[Response] =
    if (!expectsHtml(req)) newOk(TextResponse) else {
     val finagleVersion = com.twitter.finagle.Init.finagleVersion

      val procInfo = Seq("jvm/uptime", "jvm/thread/count",
        "jvm/mem/current/used", "jvm/gc/msec")

      val html = render(finagleVersion, procInfo)

      newResponse(
        contentType = "text/html;charset=UTF-8",
        content = Buf.Utf8(html)
      )
    }
}