okhttp3.internal.http.RealInterceptorChain.kt Maven / Gradle / Ivy
The newest version!
/*
* Copyright (C) 2016 Square, Inc.
*
* 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.
*/
package okhttp3.internal.http
import java.io.IOException
import java.util.concurrent.TimeUnit
import okhttp3.Call
import okhttp3.Connection
import okhttp3.Interceptor
import okhttp3.Request
import okhttp3.Response
import okhttp3.internal.checkDuration
import okhttp3.internal.connection.Exchange
import okhttp3.internal.connection.RealCall
/**
* A concrete interceptor chain that carries the entire interceptor chain: all application
* interceptors, the OkHttp core, all network interceptors, and finally the network caller.
*
* If the chain is for an application interceptor then [exchange] must be null. Otherwise it is for
* a network interceptor and [exchange] must be non-null.
*/
class RealInterceptorChain(
internal val call: RealCall,
private val interceptors: List,
private val index: Int,
internal val exchange: Exchange?,
internal val request: Request,
internal val connectTimeoutMillis: Int,
internal val readTimeoutMillis: Int,
internal val writeTimeoutMillis: Int
) : Interceptor.Chain {
private var calls: Int = 0
internal fun copy(
index: Int = this.index,
exchange: Exchange? = this.exchange,
request: Request = this.request,
connectTimeoutMillis: Int = this.connectTimeoutMillis,
readTimeoutMillis: Int = this.readTimeoutMillis,
writeTimeoutMillis: Int = this.writeTimeoutMillis
) = RealInterceptorChain(call, interceptors, index, exchange, request, connectTimeoutMillis,
readTimeoutMillis, writeTimeoutMillis)
override fun connection(): Connection? = exchange?.connection
override fun connectTimeoutMillis(): Int = connectTimeoutMillis
override fun withConnectTimeout(timeout: Int, unit: TimeUnit): Interceptor.Chain {
check(exchange == null) { "Timeouts can't be adjusted in a network interceptor" }
return copy(connectTimeoutMillis = checkDuration("connectTimeout", timeout.toLong(), unit))
}
override fun readTimeoutMillis(): Int = readTimeoutMillis
override fun withReadTimeout(timeout: Int, unit: TimeUnit): Interceptor.Chain {
check(exchange == null) { "Timeouts can't be adjusted in a network interceptor" }
return copy(readTimeoutMillis = checkDuration("readTimeout", timeout.toLong(), unit))
}
override fun writeTimeoutMillis(): Int = writeTimeoutMillis
override fun withWriteTimeout(timeout: Int, unit: TimeUnit): Interceptor.Chain {
check(exchange == null) { "Timeouts can't be adjusted in a network interceptor" }
return copy(writeTimeoutMillis = checkDuration("writeTimeout", timeout.toLong(), unit))
}
override fun call(): Call = call
override fun request(): Request = request
@Throws(IOException::class)
override fun proceed(request: Request): Response {
check(index < interceptors.size)
calls++
if (exchange != null) {
check(exchange.finder.sameHostAndPort(request.url)) {
"network interceptor ${interceptors[index - 1]} must retain the same host and port"
}
check(calls == 1) {
"network interceptor ${interceptors[index - 1]} must call proceed() exactly once"
}
}
// Call the next interceptor in the chain.
val next = copy(index = index + 1, request = request)
val interceptor = interceptors[index]
@Suppress("USELESS_ELVIS")
val response = interceptor.intercept(next) ?: throw NullPointerException(
"interceptor $interceptor returned null")
if (exchange != null) {
check(index + 1 >= interceptors.size || next.calls == 1) {
"network interceptor $interceptor must call proceed() exactly once"
}
}
check(response.body != null) { "interceptor $interceptor returned a response with no body" }
return response
}
}