gateway/gateway-ujes-support/src/main/scala/com/webank/wedatasphere/linkis/gateway/ujes/parser/EntranceRequestGatewayParser.scala

/*
 * Copyright 2019 WeBank
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.webank.wedatasphere.linkis.gateway.ujes.parser

import com.webank.wedatasphere.linkis.common.ServiceInstance
import com.webank.wedatasphere.linkis.gateway.http.GatewayContext
import com.webank.wedatasphere.linkis.gateway.parser.AbstractGatewayParser
import com.webank.wedatasphere.linkis.gateway.ujes.parser.EntranceExecutionGatewayParser._
import com.webank.wedatasphere.linkis.protocol.constants.TaskConstant
import com.webank.wedatasphere.linkis.protocol.utils.ZuulEntranceUtils
import org.springframework.stereotype.Component

/**
  * created by cooperyang on 2019/5/15.
  */
@Component
class EntranceRequestGatewayParser extends AbstractGatewayParser {
  override def shouldContainRequestBody(gatewayContext: GatewayContext): Boolean = false

  override def parse(gatewayContext: GatewayContext): Unit = gatewayContext.getRequest.getRequestURI match {
    case EntranceRequestGatewayParser.ENTRANCE_REQUEST_REGEX(version, execId) =>
      if(sendResponseWhenNotMatchVersion(gatewayContext, version)) return
      val moduleInfo = ZuulEntranceUtils.parseExecID(execId)
      val serviceInstance = if(moduleInfo.length == 3) ServiceInstance(moduleInfo(0), moduleInfo(1))
      else {
        gatewayContext.getGatewayRoute.getParams.put(TaskConstant.REQUESTAPPLICATIONNAME, moduleInfo(0))
        ServiceInstance(moduleInfo(1), moduleInfo(2))
      }
      gatewayContext.getGatewayRoute.setServiceInstance(serviceInstance)
    case _ =>
  }
}

object EntranceRequestGatewayParser {
  val ENTRANCE_REQUEST_REGEX = (ENTRANCE_HEADER + "([^/]+)/.+").r
}