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/*-
* ============LICENSE_START=======================================================
* VID
* ================================================================================
* Copyright (C) 2017 - 2019 AT&T Intellectual Property. All rights reserved.
* ================================================================================
* 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.
* ============LICENSE_END=========================================================
*/
package org.onap.vid.client
import io.joshworks.restclient.http.Headers
import io.joshworks.restclient.http.HttpResponse
import org.apache.commons.io.IOUtils
import org.apache.http.HttpVersion
import org.apache.http.message.BasicHttpResponse
import java.io.InputStream
import java.nio.charset.StandardCharsets
/// Patch NPE in joshworks's Unirest HttpResponse::getBody when getRawBody is null
fun <T> patched(httpResponse: HttpResponse<T>) =
if (willGetBodyTriggerNPE(httpResponse)) HttpResponsePatch(httpResponse) else httpResponse
private fun <T> willGetBodyTriggerNPE(httpResponse: HttpResponse<T>) =
httpResponse.rawBody == null || httpResponse.rawBody.available() == 0
private val dummyHttpResponse = BasicHttpResponse(HttpVersion.HTTP_1_1, 200, "ok")
fun extractRawAsString(response: HttpResponse<*>?): String {
try {
if (response == null || response.rawBody==null) return ""
response.rawBody.reset()
return IOUtils.toString(response.rawBody, StandardCharsets.UTF_8.name())
} catch (e: Exception) {
//Nothing to do here
}
return ""
}
/**
* This class inherits HttpResponse to have compatible interface,
* but implementation is done through delegation to another
* instance.
* For that, it's enough to pass dummy values to HttpResponse's
* constructor, as parent HttpResponse methods won't be used,
* only overridden.
*/
private class HttpResponsePatch<T>(private val delegatee: HttpResponse<T>) : HttpResponse<T>(
dummyHttpResponse, null, null
) {
override fun getBody(): T? = if (willGetBodyTriggerNPE(delegatee)) null else delegatee.body
override fun getHeaders(): Headers? = delegatee.headers
override fun getStatus() = delegatee.status
override fun isSuccessful() = delegatee.isSuccessful
override fun getStatusText(): String? = delegatee.statusText
override fun getRawBody(): InputStream? = delegatee.rawBody
}
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