使用ktor检查分块请求体中是否所有参数都存在

import io.ktor.application.*
import io.ktor.features.ContentTransformationException
import io.ktor.http.HttpStatusCode
import io.ktor.request.receiveStream
import io.ktor.response.respond
import io.ktor.routing.Route
import io.ktor.routing.post
import io.ktor.routing.routing

fun Application.module() {
    routing {
        post("/check-parameters") {
            try {
                val requestBody = call.receiveStream().bufferedReader().use { it.readText() }
                val parameters = parseRequestBody(requestBody)

                val requiredParameters = listOf("param1", "param2", "param3") // 期望存在的参数列表

                val missingParameters = requiredParameters.filterNot { parameters.containsKey(it) }

                if (missingParameters.isEmpty()) {
                    call.respond(HttpStatusCode.OK, "All parameters exist")
                } else {
                    call.respond(HttpStatusCode.BadRequest, "Missing parameters: ${missingParameters.joinToString(", ")}")
                }
            } catch (ex: ContentTransformationException) {
                call.respond(HttpStatusCode.BadRequest, "Invalid request body format")
            }
        }
    }
}

fun Route.parseRequestBody(requestBody: String): Map<String, String> {
    // 解析请求体数据并返回参数列表
    // 可以根据具体的请求体格式和数据结构进行解析
    // 以下代码只是一个示例，需要根据实际情况进行修改
    val parameters = mutableMapOf<String, String>()
    requestBody.split("&").forEach { parameter ->
        val (key, value) = parameter.split("=")
        parameters[key] = value
    }
    return parameters
}