io.specmatic.test.HttpClient.kt Maven / Gradle / Ivy
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Turn your contracts into executable specifications. Contract Driven Development - Collaboratively Design & Independently Deploy MicroServices & MicroFrontends.
package io.specmatic.test
import io.specmatic.core.*
import io.specmatic.core.HttpRequest
import io.specmatic.core.HttpResponse
import io.specmatic.core.log.HttpLogMessage
import io.specmatic.core.log.LogMessage
import io.specmatic.core.log.consoleLog
import io.specmatic.core.log.logger
import io.specmatic.core.pattern.ContractException
import io.specmatic.core.startLinesWith
import io.specmatic.core.utilities.valueMapToPlainJsonString
import io.specmatic.core.value.EmptyString
import io.specmatic.core.value.JSONObjectValue
import io.specmatic.core.value.StringValue
import io.specmatic.core.value.Value
import io.specmatic.stub.toParams
import io.ktor.client.plugins.*
import io.ktor.client.request.*
import io.ktor.client.request.forms.*
import io.ktor.client.statement.*
import io.ktor.client.utils.*
import io.ktor.http.*
import io.ktor.http.content.*
import io.ktor.util.*
import io.ktor.utils.io.charsets.*
import kotlinx.coroutines.runBlocking
import java.net.URL
import java.util.*
import java.util.zip.GZIPInputStream
// API for non-Kotlin invokers
fun createHttpClient(baseURL: String, timeout: Int) = HttpClient(baseURL, timeout)
class HttpClient(
val baseURL: String,
private val timeout: Int = 60,
private val log: (event: LogMessage) -> Unit = ::consoleLog,
private val httpClientFactory: HttpClientFactory = ApacheHttpClientFactory(timeout)
) : TestExecutor {
private val serverStateURL = "/_$APPLICATION_NAME_LOWER_CASE/state"
override fun execute(request: HttpRequest): HttpResponse {
val url = URL(request.getURL(baseURL))
val requestWithFileContent = request.loadFileContentIntoParts()
val httpLogMessage = HttpLogMessage(targetServer = baseURL)
httpLogMessage.logStartRequestTime()
logger.debug("Starting request ${request.method} ${request.path}")
return runBlocking {
httpClientFactory.create().use { ktorClient ->
val ktorResponse: io.ktor.client.statement.HttpResponse = ktorClient.request(url) {
requestWithFileContent.buildKTORRequest(this, url)
}
val outboundRequest: HttpRequest =
ktorHttpRequestToHttpRequestForLogging(ktorResponse.request, requestWithFileContent)
httpLogMessage.addRequest(outboundRequest)
ktorResponseToHttpResponse(ktorResponse).also {
httpLogMessage.addResponse(it)
log(httpLogMessage)
ktorClient.close()
}
}
}
}
override fun setServerState(serverState: Map) {
if (serverState.isEmpty()) return
val url = URL(baseURL + serverStateURL)
val startTime = Date()
runBlocking {
httpClientFactory.create().use { ktorClient ->
var endTime: Date? = null
var response: HttpResponse? = null
try {
val ktorResponse: io.ktor.client.statement.HttpResponse = ktorClient.request(url) {
this.method = HttpMethod.Post
this.contentType(ContentType.Application.Json)
this.setBody(valueMapToPlainJsonString(serverState))
}
endTime = Date()
response = ktorResponseToHttpResponse(ktorResponse)
if (ktorResponse.status != HttpStatusCode.OK)
throw Exception("API responded with ${ktorResponse.status}")
} finally {
val serverStateLog = object : LogMessage {
override fun toJSONObject(): JSONObjectValue {
val data: MutableMap = mutableMapOf(
"requestTime" to startTime.toString(),
"serverState" to valueMapToPlainJsonString(serverState)
)
if (endTime != null && response != null) {
data["endTime"] = endTime.toString()
data["response"] = response.toLogString()
}
return JSONObjectValue(data.mapValues { StringValue(it.value) }.toMap())
}
override fun toLogString(): String {
return """
# >> Request Sent At $startTime
${startLinesWith(valueMapToPlainJsonString(serverState), "# ")}
"# << Complete At $endTime"
""".trimIndent()
}
}
log(serverStateLog)
}
}
}
}
}
private fun ktorHttpRequestToHttpRequestForLogging(
request: io.ktor.client.request.HttpRequest,
specmaticRequest: HttpRequest
): HttpRequest {
val (body, formFields, multiPartFormData) =
when (request.content) {
is FormDataContent -> Triple(EmptyString, specmaticRequest.formFields, emptyList())
is TextContent -> {
val bodyValue = when (specmaticRequest.body) {
is NoBodyValue -> NoBodyValue
else -> specmaticRequest.body
}
Triple(bodyValue, emptyMap(), emptyList())
}
is MultiPartFormDataContent -> Triple(EmptyString, emptyMap(), specmaticRequest.multiPartFormData)
is EmptyContent -> Triple(EmptyString, emptyMap(), emptyList())
else -> throw ContractException("Unknown type of body content sent in the request")
}
val requestHeaders: Map = request.headers.toMap().mapValues { it.value[0] }.plus(
CONTENT_TYPE to (request.content.contentType?.toString() ?: "NOT SENT")
)
return HttpRequest(
method = request.method.value,
path = request.url.encodedPath,
headers = requestHeaders,
body = body,
queryParams = QueryParameters(paramPairs = toParams(request.url.parameters)),
formFields = formFields,
multiPartFormData = multiPartFormData
)
}
suspend fun ktorResponseToHttpResponse(ktorResponse: io.ktor.client.statement.HttpResponse): HttpResponse {
val (headers, body) = decodeBody(ktorResponse)
return HttpResponse(ktorResponse.status.value, body, headers)
}
suspend fun decodeBody(ktorResponse: io.ktor.client.statement.HttpResponse): Pair, String> {
val encoding = ktorResponse.headers["Content-Encoding"]
val headers = ktorResponse.headers.toMap().mapValues { it.value.first() }
return try {
decodeBody(ktorResponse.readBytes(), encoding, ktorResponse.charset(), headers)
} catch (e: ClientRequestException) {
decodeBody(e.response.readBytes(), encoding, ktorResponse.charset(), headers)
}
}
fun decodeBody(
bytes: ByteArray,
encoding: String?,
receivedCharset: Charset?,
headers: Map
): Pair, String> =
when (encoding) {
"gzip" -> {
Pair(
headers.minus("Content-Encoding"),
unzip(bytes, receivedCharset)
)
}
else -> Pair(headers, String(bytes))
}
fun unzip(bytes: ByteArray, receivedCharset: Charset?): String {
val charset = Charset.forName(receivedCharset?.name() ?: "UTF-8")
return GZIPInputStream(bytes.inputStream()).bufferedReader(charset).use { it.readText() }
}