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/*
* Copyright © 2017-2019 AT&T, Bell Canada, Nordix Foundation
*
* 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.
*
* SPDX-License-Identifier: Apache-2.0
*/
package org.onap.ccsdk.apps.blueprintsprocessor.rest.service
import org.apache.commons.io.IOUtils
import org.apache.http.client.methods.*
import org.apache.http.entity.StringEntity
import org.apache.http.impl.client.CloseableHttpClient
import org.apache.http.impl.client.HttpClients
import org.apache.http.message.BasicHeader
import org.onap.ccsdk.apps.blueprintsprocessor.rest.utils.WebClientUtils
import org.onap.ccsdk.apps.controllerblueprints.core.BluePrintProcessorException
import org.springframework.http.HttpMethod
import java.nio.charset.Charset
interface BlueprintWebClientService {
fun defaultHeaders(): Map<String, String>
fun host(uri: String): String
fun httpClient(): CloseableHttpClient {
return HttpClients.custom()
.addInterceptorFirst(WebClientUtils.logRequest())
.addInterceptorLast(WebClientUtils.logResponse())
.build()
}
fun exchangeResource(methodType: String, path: String, request: String): String {
return this.exchangeResource(methodType, path, request, defaultHeaders())
}
fun exchangeResource(methodType: String, path: String, request: String, headers: Map<String, String>): String {
val convertedHeaders: Array<BasicHeader> = convertToBasicHeaders(headers)
return when (HttpMethod.resolve(methodType)) {
HttpMethod.DELETE -> delete(path, convertedHeaders)
HttpMethod.GET -> get(path, convertedHeaders)
HttpMethod.POST -> post(path, request, convertedHeaders)
HttpMethod.PUT -> put(path, request, convertedHeaders)
HttpMethod.PATCH -> patch(path, request, convertedHeaders)
else -> throw BluePrintProcessorException("Unsupported methodType($methodType)")
}
}
fun convertToBasicHeaders(headers: Map<String, String>): Array<BasicHeader> {
val convertedHeaders = Array<BasicHeader>(headers.size){ BasicHeader("","") }
var currentElement = 0
for ((name, value) in headers) {
convertedHeaders[currentElement++] = BasicHeader(name, value)
}
return convertedHeaders
}
fun delete(path: String, headers: Array<BasicHeader>): String {
val httpDelete = HttpDelete(host(path))
httpDelete.setHeaders(headers)
httpClient().execute(httpDelete).entity.content.use {
return IOUtils.toString(it, Charset.defaultCharset())
}
}
fun get(path: String, headers: Array<BasicHeader>): String {
val httpGet = HttpGet(host(path))
httpGet.setHeaders(headers)
httpClient().execute(httpGet).entity.content.use {
return IOUtils.toString(it, Charset.defaultCharset())
}
}
fun post(path: String, request: String, headers: Array<BasicHeader>): String {
val httpPost = HttpPost(host(path))
val entity = StringEntity(request)
httpPost.entity = entity
httpPost.setHeaders(headers)
httpClient().execute(httpPost).entity.content.use {
return IOUtils.toString(it, Charset.defaultCharset())
}
}
fun put(path: String, request: String, headers: Array<BasicHeader>): String {
val httpPut = HttpPut(host(path))
val entity = StringEntity(request)
httpPut.entity = entity
httpPut.setHeaders(headers)
httpClient().execute(httpPut).entity.content.use {
return IOUtils.toString(it, Charset.defaultCharset())
}
}
fun patch(path: String, request: String, headers: Array<BasicHeader>): String {
val httpPatch = HttpPatch(host(path))
val entity = StringEntity(request)
httpPatch.entity = entity
httpPatch.setHeaders(headers)
httpClient().execute(httpPatch).entity.content.use {
return IOUtils.toString(it, Charset.defaultCharset())
}
}
}
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