ms/blueprintsprocessor/modules/commons/rest-lib/src/main/kotlin/org/onap/ccsdk/cds/blueprintsprocessor/rest/service/BlueprintWebClientService.kt

   1 /*
   2  * Copyright © 2017-2019 AT&T, Bell Canada, Nordix Foundation
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  *     http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16
  17 package org.onap.ccsdk.cds.blueprintsprocessor.rest.service
  18
  19 import org.apache.commons.io.IOUtils
  20 import org.apache.http.client.methods.*
  21 import org.apache.http.entity.StringEntity
  22 import org.apache.http.impl.client.CloseableHttpClient
  23 import org.apache.http.impl.client.HttpClients
  24 import org.apache.http.message.BasicHeader
  25 import org.onap.ccsdk.cds.blueprintsprocessor.rest.utils.WebClientUtils
  26 import org.onap.ccsdk.cds.controllerblueprints.core.BluePrintProcessorException
  27 import org.springframework.http.HttpMethod
  28 import java.nio.charset.Charset
  29
  30 interface BlueprintWebClientService {
  31
  32     fun defaultHeaders(): Map<String, String>
  33
  34     fun host(uri: String): String
  35
  36     fun httpClient(): CloseableHttpClient {
  37         return HttpClients.custom()
  38             .addInterceptorFirst(WebClientUtils.logRequest())
  39             .addInterceptorLast(WebClientUtils.logResponse())
  40             .build()
  41     }
  42
  43     fun exchangeResource(methodType: String, path: String, request: String): String {
  44         return this.exchangeResource(methodType, path, request, defaultHeaders())
  45     }
  46
  47     fun exchangeResource(methodType: String, path: String, request: String, headers: Map<String, String>): String {
  48         val convertedHeaders: Array<BasicHeader> = convertToBasicHeaders(headers)
  49         return when (HttpMethod.resolve(methodType)) {
  50             HttpMethod.DELETE -> delete(path, convertedHeaders)
  51             HttpMethod.GET -> get(path, convertedHeaders)
  52             HttpMethod.POST -> post(path, request, convertedHeaders)
  53             HttpMethod.PUT -> put(path, request, convertedHeaders)
  54             HttpMethod.PATCH -> patch(path, request, convertedHeaders)
  55             else -> throw BluePrintProcessorException("Unsupported methodType($methodType)")
  56         }
  57     }
  58
  59     fun convertToBasicHeaders(headers: Map<String, String>): Array<BasicHeader> {
  60         return headers.map{ BasicHeader(it.key, it.value)}.toTypedArray()
  61     }
  62
  63     fun delete(path: String, headers: Array<BasicHeader>): String {
  64         val httpDelete = HttpDelete(host(path))
  65         httpDelete.setHeaders(headers)
  66         httpClient().execute(httpDelete).entity.content.use {
  67             return IOUtils.toString(it, Charset.defaultCharset())
  68         }
  69     }
  70
  71     fun get(path: String, headers: Array<BasicHeader>): String {
  72         val httpGet = HttpGet(host(path))
  73         httpGet.setHeaders(headers)
  74         httpClient().execute(httpGet).entity.content.use {
  75             return IOUtils.toString(it, Charset.defaultCharset())
  76         }
  77     }
  78
  79     fun post(path: String, request: String, headers: Array<BasicHeader>): String {
  80         val httpPost = HttpPost(host(path))
  81         val entity = StringEntity(request)
  82         httpPost.entity = entity
  83         httpPost.setHeaders(headers)
  84         httpClient().execute(httpPost).entity.content.use {
  85             return IOUtils.toString(it, Charset.defaultCharset())
  86         }
  87     }
  88
  89     fun put(path: String, request: String, headers: Array<BasicHeader>): String {
  90         val httpPut = HttpPut(host(path))
  91         val entity = StringEntity(request)
  92         httpPut.entity = entity
  93         httpPut.setHeaders(headers)
  94         httpClient().execute(httpPut).entity.content.use {
  95             return IOUtils.toString(it, Charset.defaultCharset())
  96         }
  97     }
  98
  99     fun patch(path: String, request: String, headers: Array<BasicHeader>): String {
 100         val httpPatch = HttpPatch(host(path))
 101         val entity = StringEntity(request)
 102         httpPatch.entity = entity
 103         httpPatch.setHeaders(headers)
 104         httpClient().execute(httpPatch).entity.content.use {
 105             return IOUtils.toString(it, Charset.defaultCharset())
 106         }
 107     }
 108 }