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/*
* 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.platform
import java.lang.reflect.InvocationHandler
import java.lang.reflect.InvocationTargetException
import java.lang.reflect.Method
import java.lang.reflect.Proxy
import javax.net.ssl.SSLSocket
import okhttp3.Protocol
/** OpenJDK 8 with `org.mortbay.jetty.alpn:alpn-boot` in the boot class path. */
class Jdk8WithJettyBootPlatform(
private val putMethod: Method,
private val getMethod: Method,
private val removeMethod: Method,
private val clientProviderClass: Class<*>,
private val serverProviderClass: Class<*>
) : Platform() {
override fun configureTlsExtensions(
sslSocket: SSLSocket,
hostname: String?,
protocols: List
) {
val names = alpnProtocolNames(protocols)
try {
val alpnProvider = Proxy.newProxyInstance(Platform::class.java.classLoader,
arrayOf(clientProviderClass, serverProviderClass), AlpnProvider(names))
putMethod.invoke(null, sslSocket, alpnProvider)
} catch (e: InvocationTargetException) {
throw AssertionError("failed to set ALPN", e)
} catch (e: IllegalAccessException) {
throw AssertionError("failed to set ALPN", e)
}
}
override fun afterHandshake(sslSocket: SSLSocket) {
try {
removeMethod.invoke(null, sslSocket)
} catch (e: IllegalAccessException) {
throw AssertionError("failed to remove ALPN", e)
} catch (e: InvocationTargetException) {
throw AssertionError("failed to remove ALPN", e)
}
}
override fun getSelectedProtocol(sslSocket: SSLSocket): String? {
try {
val provider = Proxy.getInvocationHandler(getMethod.invoke(null, sslSocket)) as AlpnProvider
if (!provider.unsupported && provider.selected == null) {
log("ALPN callback dropped: HTTP/2 is disabled. " + "Is alpn-boot on the boot class path?")
return null
}
return if (provider.unsupported) null else provider.selected
} catch (e: InvocationTargetException) {
throw AssertionError("failed to get ALPN selected protocol", e)
} catch (e: IllegalAccessException) {
throw AssertionError("failed to get ALPN selected protocol", e)
}
}
/**
* Handle the methods of ALPN's ClientProvider and ServerProvider without a compile-time
* dependency on those interfaces.
*/
private class AlpnProvider(
/** This peer's supported protocols. */
private val protocols: List
) : InvocationHandler {
/** Set when remote peer notifies ALPN is unsupported. */
var unsupported: Boolean = false
/** The protocol the server selected. */
var selected: String? = null
@Throws(Throwable::class)
override fun invoke(proxy: Any, method: Method, args: Array?): Any? {
val callArgs = args ?: arrayOf()
val methodName = method.name
val returnType = method.returnType
if (methodName == "supports" && Boolean::class.javaPrimitiveType == returnType) {
return true // ALPN is supported.
} else if (methodName == "unsupported" && Void.TYPE == returnType) {
this.unsupported = true // Peer doesn't support ALPN.
return null
} else if (methodName == "protocols" && callArgs.isEmpty()) {
return protocols // Client advertises these protocols.
} else if ((methodName == "selectProtocol" || methodName == "select") &&
String::class.java == returnType && callArgs.size == 1 && callArgs[0] is List<*>) {
val peerProtocols = callArgs[0] as List<*>
// Pick the first known protocol the peer advertises.
for (i in 0..peerProtocols.size) {
val protocol = peerProtocols[i] as String
if (protocol in protocols) {
selected = protocol
return selected
}
}
selected = protocols[0] // On no intersection, try peer's first protocol.
return selected
} else if ((methodName == "protocolSelected" || methodName == "selected") && callArgs.size == 1) {
this.selected = callArgs[0] as String // Server selected this protocol.
return null
} else {
return method.invoke(this, *callArgs)
}
}
}
companion object {
fun buildIfSupported(): Platform? {
val jvmVersion = System.getProperty("java.specification.version", "unknown")
try {
// 1.8, 9, 10, 11, 12 etc
val version = jvmVersion.toInt()
if (version >= 9) return null
} catch (_: NumberFormatException) {
// expected on >= JDK 9
}
// Find Jetty's ALPN extension for OpenJDK.
try {
val alpnClassName = "org.eclipse.jetty.alpn.ALPN"
val alpnClass = Class.forName(alpnClassName, true, null)
val providerClass = Class.forName("$alpnClassName\$Provider", true, null)
val clientProviderClass = Class.forName("$alpnClassName\$ClientProvider", true, null)
val serverProviderClass = Class.forName("$alpnClassName\$ServerProvider", true, null)
val putMethod = alpnClass.getMethod("put", SSLSocket::class.java, providerClass)
val getMethod = alpnClass.getMethod("get", SSLSocket::class.java)
val removeMethod = alpnClass.getMethod("remove", SSLSocket::class.java)
return Jdk8WithJettyBootPlatform(
putMethod, getMethod, removeMethod, clientProviderClass, serverProviderClass)
} catch (_: ClassNotFoundException) {
} catch (_: NoSuchMethodException) {
}
return null
}
}
}
