如何使用ktor客户端设置HttpServletResponse的正文

import io.ktor.client.HttpClient
import io.ktor.client.request.get
import io.ktor.client.request.headers
import io.ktor.client.request.post
import io.ktor.client.request.url
import io.ktor.client.statement.HttpResponse
import io.ktor.http.HttpHeaders
import io.ktor.http.HttpMethod
import io.ktor.http.HttpStatusCode

suspend fun main() {
    val client = HttpClient()
    
    // 发送GET请求
    val getResponse: HttpResponse = client.get {
        url("https://example.com/api")
        headers {
            append(HttpHeaders.ContentType, "application/json")
        }
    }
    
    if (getResponse.status == HttpStatusCode.OK) {
        val responseBody = getResponse.readText()
        // 处理响应正文
        // ...
    }
    
    // 发送POST请求
    val postResponse: HttpResponse = client.post {
        url("https://example.com/api")
        headers {
            append(HttpHeaders.ContentType, "application/json")
        }
        body = "request body"
    }
    
    if (postResponse.status == HttpStatusCode.OK) {
        val responseBody = postResponse.readText()
        // 处理响应正文
        // ...
    }
    
    client.close()
}