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/*
* Copyright (C) 2013 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
import java.io.Closeable
import java.io.IOException
import java.net.HttpURLConnection.HTTP_MOVED_PERM
import java.net.HttpURLConnection.HTTP_MOVED_TEMP
import java.net.HttpURLConnection.HTTP_MULT_CHOICE
import java.net.HttpURLConnection.HTTP_PROXY_AUTH
import java.net.HttpURLConnection.HTTP_SEE_OTHER
import java.net.HttpURLConnection.HTTP_UNAUTHORIZED
import okhttp3.ResponseBody.Companion.asResponseBody
import okhttp3.internal.connection.Exchange
import okhttp3.internal.http.StatusLine.Companion.HTTP_PERM_REDIRECT
import okhttp3.internal.http.StatusLine.Companion.HTTP_TEMP_REDIRECT
import okhttp3.internal.http.parseChallenges
import okio.Buffer
/**
* An HTTP response. Instances of this class are not immutable: the response body is a one-shot
* value that may be consumed only once and then closed. All other properties are immutable.
*
* This class implements [Closeable]. Closing it simply closes its response body. See
* [ResponseBody] for an explanation and examples.
*/
class Response internal constructor(
/**
* The wire-level request that initiated this HTTP response. This is not necessarily the same
* request issued by the application:
*
* * It may be transformed by the HTTP client. For example, the client may copy headers like
* `Content-Length` from the request body.
* * It may be the request generated in response to an HTTP redirect or authentication
* challenge. In this case the request URL may be different than the initial request URL.
*/
@get:JvmName("request") val request: Request,
/** Returns the HTTP protocol, such as [Protocol.HTTP_1_1] or [Protocol.HTTP_1_0]. */
@get:JvmName("protocol") val protocol: Protocol,
/** Returns the HTTP status message. */
@get:JvmName("message") val message: String,
/** Returns the HTTP status code. */
@get:JvmName("code") val code: Int,
/**
* Returns the TLS handshake of the connection that carried this response, or null if the
* response was received without TLS.
*/
@get:JvmName("handshake") val handshake: Handshake?,
/** Returns the HTTP headers. */
@get:JvmName("headers") val headers: Headers,
/**
* Returns a non-null value if this response was passed to [Callback.onResponse] or returned
* from [Call.execute]. Response bodies must be [closed][ResponseBody] and may
* be consumed only once.
*
* This always returns null on responses returned from [cacheResponse], [networkResponse],
* and [priorResponse].
*/
@get:JvmName("body") val body: ResponseBody?,
/**
* Returns the raw response received from the network. Will be null if this response didn't use
* the network, such as when the response is fully cached. The body of the returned response
* should not be read.
*/
@get:JvmName("networkResponse") val networkResponse: Response?,
/**
* Returns the raw response received from the cache. Will be null if this response didn't use
* the cache. For conditional get requests the cache response and network response may both be
* non-null. The body of the returned response should not be read.
*/
@get:JvmName("cacheResponse") val cacheResponse: Response?,
/**
* Returns the response for the HTTP redirect or authorization challenge that triggered this
* response, or null if this response wasn't triggered by an automatic retry. The body of the
* returned response should not be read because it has already been consumed by the redirecting
* client.
*/
@get:JvmName("priorResponse") val priorResponse: Response?,
/**
* Returns a [timestamp][System.currentTimeMillis] taken immediately before OkHttp
* transmitted the initiating request over the network. If this response is being served from the
* cache then this is the timestamp of the original request.
*/
@get:JvmName("sentRequestAtMillis") val sentRequestAtMillis: Long,
/**
* Returns a [timestamp][System.currentTimeMillis] taken immediately after OkHttp
* received this response's headers from the network. If this response is being served from the
* cache then this is the timestamp of the original response.
*/
@get:JvmName("receivedResponseAtMillis") val receivedResponseAtMillis: Long,
@get:JvmName("exchange") internal val exchange: Exchange?
) : Closeable {
private var lazyCacheControl: CacheControl? = null
@JvmName("-deprecated_request")
@Deprecated(
message = "moved to val",
replaceWith = ReplaceWith(expression = "request"),
level = DeprecationLevel.ERROR)
fun request(): Request = request
@JvmName("-deprecated_protocol")
@Deprecated(
message = "moved to val",
replaceWith = ReplaceWith(expression = "protocol"),
level = DeprecationLevel.ERROR)
fun protocol(): Protocol = protocol
@JvmName("-deprecated_code")
@Deprecated(
message = "moved to val",
replaceWith = ReplaceWith(expression = "code"),
level = DeprecationLevel.ERROR)
fun code(): Int = code
/**
* Returns true if the code is in [200..300), which means the request was successfully received,
* understood, and accepted.
*/
val isSuccessful: Boolean
get() = code in 200..299
@JvmName("-deprecated_message")
@Deprecated(
message = "moved to val",
replaceWith = ReplaceWith(expression = "message"),
level = DeprecationLevel.ERROR)
fun message(): String = message
@JvmName("-deprecated_handshake")
@Deprecated(
message = "moved to val",
replaceWith = ReplaceWith(expression = "handshake"),
level = DeprecationLevel.ERROR)
fun handshake(): Handshake? = handshake
fun headers(name: String): List = headers.values(name)
@JvmOverloads
fun header(name: String, defaultValue: String? = null): String? = headers[name] ?: defaultValue
@JvmName("-deprecated_headers")
@Deprecated(
message = "moved to val",
replaceWith = ReplaceWith(expression = "headers"),
level = DeprecationLevel.ERROR)
fun headers(): Headers = headers
/**
* Returns the trailers after the HTTP response, which may be empty. It is an error to call this
* before the entire HTTP response body has been consumed.
*/
@Throws(IOException::class)
fun trailers(): Headers = checkNotNull(exchange) { "trailers not available" }.trailers()
/**
* Peeks up to [byteCount] bytes from the response body and returns them as a new response
* body. If fewer than [byteCount] bytes are in the response body, the full response body is
* returned. If more than [byteCount] bytes are in the response body, the returned value
* will be truncated to [byteCount] bytes.
*
* It is an error to call this method after the body has been consumed.
*
* **Warning:** this method loads the requested bytes into memory. Most applications should set
* a modest limit on `byteCount`, such as 1 MiB.
*/
@Throws(IOException::class)
fun peekBody(byteCount: Long): ResponseBody {
val peeked = body!!.source().peek()
val buffer = Buffer()
peeked.request(byteCount)
buffer.write(peeked, minOf(byteCount, peeked.buffer.size))
return buffer.asResponseBody(body.contentType(), buffer.size)
}
@JvmName("-deprecated_body")
@Deprecated(
message = "moved to val",
replaceWith = ReplaceWith(expression = "body"),
level = DeprecationLevel.ERROR)
fun body(): ResponseBody? = body
fun newBuilder(): Builder = Builder(this)
/** Returns true if this response redirects to another resource. */
val isRedirect: Boolean
get() = when (code) {
HTTP_PERM_REDIRECT, HTTP_TEMP_REDIRECT, HTTP_MULT_CHOICE, HTTP_MOVED_PERM, HTTP_MOVED_TEMP, HTTP_SEE_OTHER -> true
else -> false
}
@JvmName("-deprecated_networkResponse")
@Deprecated(
message = "moved to val",
replaceWith = ReplaceWith(expression = "networkResponse"),
level = DeprecationLevel.ERROR)
fun networkResponse(): Response? = networkResponse
@JvmName("-deprecated_cacheResponse")
@Deprecated(
message = "moved to val",
replaceWith = ReplaceWith(expression = "cacheResponse"),
level = DeprecationLevel.ERROR)
fun cacheResponse(): Response? = cacheResponse
@JvmName("-deprecated_priorResponse")
@Deprecated(
message = "moved to val",
replaceWith = ReplaceWith(expression = "priorResponse"),
level = DeprecationLevel.ERROR)
fun priorResponse(): Response? = priorResponse
/**
* Returns the RFC 7235 authorization challenges appropriate for this response's code. If the
* response code is 401 unauthorized, this returns the "WWW-Authenticate" challenges. If the
* response code is 407 proxy unauthorized, this returns the "Proxy-Authenticate" challenges.
* Otherwise this returns an empty list of challenges.
*
* If a challenge uses the `token68` variant instead of auth params, there is exactly one
* auth param in the challenge at key null. Invalid headers and challenges are ignored.
* No semantic validation is done, for example that `Basic` auth must have a `realm`
* auth param, this is up to the caller that interprets these challenges.
*/
fun challenges(): List {
return headers.parseChallenges(
when (code) {
HTTP_UNAUTHORIZED -> "WWW-Authenticate"
HTTP_PROXY_AUTH -> "Proxy-Authenticate"
else -> return emptyList()
}
)
}
/**
* Returns the cache control directives for this response. This is never null, even if this
* response contains no `Cache-Control` header.
*/
@get:JvmName("cacheControl") val cacheControl: CacheControl
get() {
var result = lazyCacheControl
if (result == null) {
result = CacheControl.parse(headers)
lazyCacheControl = result
}
return result
}
@JvmName("-deprecated_cacheControl")
@Deprecated(
message = "moved to val",
replaceWith = ReplaceWith(expression = "cacheControl"),
level = DeprecationLevel.ERROR)
fun cacheControl(): CacheControl = cacheControl
@JvmName("-deprecated_sentRequestAtMillis")
@Deprecated(
message = "moved to val",
replaceWith = ReplaceWith(expression = "sentRequestAtMillis"),
level = DeprecationLevel.ERROR)
fun sentRequestAtMillis(): Long = sentRequestAtMillis
@JvmName("-deprecated_receivedResponseAtMillis")
@Deprecated(
message = "moved to val",
replaceWith = ReplaceWith(expression = "receivedResponseAtMillis"),
level = DeprecationLevel.ERROR)
fun receivedResponseAtMillis(): Long = receivedResponseAtMillis
/**
* Closes the response body. Equivalent to `body().close()`.
*
* It is an error to close a response that is not eligible for a body. This includes the
* responses returned from [cacheResponse], [networkResponse], and [priorResponse].
*/
override fun close() {
checkNotNull(body) { "response is not eligible for a body and must not be closed" }.close()
}
override fun toString(): String =
"Response{protocol=$protocol, code=$code, message=$message, url=${request.url}}"
open class Builder {
internal var request: Request? = null
internal var protocol: Protocol? = null
internal var code = -1
internal var message: String? = null
internal var handshake: Handshake? = null
internal var headers: Headers.Builder
internal var body: ResponseBody? = null
internal var networkResponse: Response? = null
internal var cacheResponse: Response? = null
internal var priorResponse: Response? = null
internal var sentRequestAtMillis: Long = 0
internal var receivedResponseAtMillis: Long = 0
internal var exchange: Exchange? = null
constructor() {
headers = Headers.Builder()
}
internal constructor(response: Response) {
this.request = response.request
this.protocol = response.protocol
this.code = response.code
this.message = response.message
this.handshake = response.handshake
this.headers = response.headers.newBuilder()
this.body = response.body
this.networkResponse = response.networkResponse
this.cacheResponse = response.cacheResponse
this.priorResponse = response.priorResponse
this.sentRequestAtMillis = response.sentRequestAtMillis
this.receivedResponseAtMillis = response.receivedResponseAtMillis
this.exchange = response.exchange
}
open fun request(request: Request) = apply {
this.request = request
}
open fun protocol(protocol: Protocol) = apply {
this.protocol = protocol
}
open fun code(code: Int) = apply {
this.code = code
}
open fun message(message: String) = apply {
this.message = message
}
open fun handshake(handshake: Handshake?) = apply {
this.handshake = handshake
}
/**
* Sets the header named [name] to [value]. If this request already has any headers
* with that name, they are all replaced.
*/
open fun header(name: String, value: String) = apply {
headers[name] = value
}
/**
* Adds a header with [name] to [value]. Prefer this method for multiply-valued
* headers like "Set-Cookie".
*/
open fun addHeader(name: String, value: String) = apply {
headers.add(name, value)
}
/** Removes all headers named [name] on this builder. */
open fun removeHeader(name: String) = apply {
headers.removeAll(name)
}
/** Removes all headers on this builder and adds [headers]. */
open fun headers(headers: Headers) = apply {
this.headers = headers.newBuilder()
}
open fun body(body: ResponseBody?) = apply {
this.body = body
}
open fun networkResponse(networkResponse: Response?) = apply {
checkSupportResponse("networkResponse", networkResponse)
this.networkResponse = networkResponse
}
open fun cacheResponse(cacheResponse: Response?) = apply {
checkSupportResponse("cacheResponse", cacheResponse)
this.cacheResponse = cacheResponse
}
private fun checkSupportResponse(name: String, response: Response?) {
response?.apply {
require(body == null) { "$name.body != null" }
require(networkResponse == null) { "$name.networkResponse != null" }
require(cacheResponse == null) { "$name.cacheResponse != null" }
require(priorResponse == null) { "$name.priorResponse != null" }
}
}
open fun priorResponse(priorResponse: Response?) = apply {
checkPriorResponse(priorResponse)
this.priorResponse = priorResponse
}
private fun checkPriorResponse(response: Response?) {
response?.apply {
require(body == null) { "priorResponse.body != null" }
}
}
open fun sentRequestAtMillis(sentRequestAtMillis: Long) = apply {
this.sentRequestAtMillis = sentRequestAtMillis
}
open fun receivedResponseAtMillis(receivedResponseAtMillis: Long) = apply {
this.receivedResponseAtMillis = receivedResponseAtMillis
}
internal fun initExchange(deferredTrailers: Exchange) {
this.exchange = deferredTrailers
}
open fun build(): Response {
check(code >= 0) { "code < 0: $code" }
return Response(
checkNotNull(request) { "request == null" },
checkNotNull(protocol) { "protocol == null" },
checkNotNull(message) { "message == null" },
code,
handshake,
headers.build(),
body,
networkResponse,
cacheResponse,
priorResponse,
sentRequestAtMillis,
receivedResponseAtMillis,
exchange
)
}
}
}
