sample.kt

import okhttp3.*
import okhttp3.MediaType.Companion.toMediaTypeOrNull
import java.io.IOException

// Inner interceptor that simulates a failure
class FailingInterceptor : Interceptor {
    override fun intercept(chain: Interceptor.Chain): Response {
        throw IOException("Simulated network error from FailingInterceptor")
    }
}

// Outer interceptor that catches IOExceptions from inner interceptors
class CatchingInterceptor : Interceptor {
    override fun intercept(chain: Interceptor.Chain): Response {
        return try {
            chain.proceed(chain.request())
        } catch (e: IOException) {
            println("Caught IOException in CatchingInterceptor: ${e.message}")
            // Return a dummy response or rethrow as needed
            Response.Builder()
                .request(chain.request())
                .protocol(Protocol.HTTP_1_1)
                .code(500) // Internal Server Error
                .message("Intercepted Exception")
                .body(ResponseBody.create("text/plain".toMediaTypeOrNull(), "Error handled"))
                .build()
        }
    }
}

// Usage
fun main() {
    val client = OkHttpClient.Builder()
        .addInterceptor(CatchingInterceptor()) // Outer
        .addInterceptor(FailingInterceptor())  // Inner
        .build()

    val request = Request.Builder()
        .url("http://localhost/") // URL won't be used because the failure is simulated
        .build()

    val response = client.newCall(request).execute()
    println("Response: ${response.code} - ${response.body?.string()}")
}