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/*
* Copyright (C) 2014 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.ws
import java.util.Random
import okhttp3.TestUtil.repeat
import okhttp3.internal.code
import okhttp3.internal.format
import okhttp3.internal.ws.WebSocketProtocol.OPCODE_BINARY
import okhttp3.internal.ws.WebSocketProtocol.OPCODE_TEXT
import okhttp3.internal.ws.WebSocketProtocol.PAYLOAD_BYTE_MAX
import okhttp3.internal.ws.WebSocketProtocol.PAYLOAD_SHORT_MAX
import okio.Buffer
import okio.ByteString
import okio.ByteString.Companion.EMPTY
import okio.ByteString.Companion.decodeHex
import okio.ByteString.Companion.encodeUtf8
import okio.ByteString.Companion.toByteString
import org.assertj.core.api.Assertions.assertThat
import org.junit.jupiter.api.Assertions.fail
import org.junit.jupiter.api.Test
import org.junit.jupiter.api.extension.AfterEachCallback
import org.junit.jupiter.api.extension.ExtensionContext
import org.junit.jupiter.api.extension.RegisterExtension
class WebSocketWriterTest {
private val data = Buffer()
private val random = Random(0)
/**
* Check all data as verified inside of the test. We do this in an AfterEachCallback so that
* exceptions thrown from the test do not cause this check to fail.
*/
@RegisterExtension
val noDataLeftBehind = AfterEachCallback { context: ExtensionContext ->
if (context.executionException.isPresent) return@AfterEachCallback
assertThat(data.readByteString().hex())
.overridingErrorMessage("Data not empty")
.isEqualTo("")
}
// Mutually exclusive. Use the one corresponding to the peer whose behavior you wish to test.
private val serverWriter = WebSocketWriter(
isClient = false,
sink = data,
random = random,
perMessageDeflate = false,
noContextTakeover = false,
minimumDeflateSize = 0L
)
private val clientWriter = WebSocketWriter(
isClient = true,
sink = data,
random = random,
perMessageDeflate = false,
noContextTakeover = false,
minimumDeflateSize = 0L
)
@Test fun serverTextMessage() {
serverWriter.writeMessageFrame(OPCODE_TEXT, "Hello".encodeUtf8())
assertData("810548656c6c6f")
}
@Test fun serverCompressedTextMessage() {
val serverWriter = WebSocketWriter(
false, data, random, true, false, 0L
)
serverWriter.writeMessageFrame(OPCODE_TEXT, "Hello".encodeUtf8())
assertData("c107f248cdc9c90700")
}
@Test fun serverSmallBufferedPayloadWrittenAsOneFrame() {
val length = 5
val payload: ByteString = (binaryData(length))
serverWriter.writeMessageFrame(OPCODE_TEXT, payload)
assertData("8105")
assertData(payload)
}
@Test fun serverLargeBufferedPayloadWrittenAsOneFrame() {
val length = 12345
val payload: ByteString = (binaryData(length))
serverWriter.writeMessageFrame(OPCODE_TEXT, payload)
assertData("817e")
assertData(format("%04x", length))
assertData(payload)
}
@Test fun clientTextMessage() {
clientWriter.writeMessageFrame(OPCODE_TEXT, "Hello".encodeUtf8())
assertData("818560b420bb28d14cd70f")
}
@Test fun clientCompressedTextMessage() {
val clientWriter = WebSocketWriter(
false, data, random, true, false, 0L
)
clientWriter.writeMessageFrame(OPCODE_TEXT, "Hello".encodeUtf8())
assertData("c107f248cdc9c90700")
}
@Test fun serverBinaryMessage() {
val payload = ("60b420bb3851d9d47acb933dbe70399bf6c92da33af01d4fb770e98c0325f41d3ebaf8986da71" +
"2c82bcd4d554bf0b54023c2").decodeHex()
serverWriter.writeMessageFrame(OPCODE_BINARY, payload)
assertData("8232")
assertData(payload)
}
@Test fun serverMessageLengthShort() {
// Create a payload which will overflow the normal payload byte size.
val payload = Buffer()
while (payload.completeSegmentByteCount() <= PAYLOAD_BYTE_MAX) {
payload.writeByte('0'.code)
}
serverWriter.writeMessageFrame(OPCODE_BINARY, payload.snapshot())
// Write directly to the unbuffered sink. This ensures it will become single frame.
assertData("827e") // 'e' == 4-byte follow-up length.
assertData(format("%04X", payload.completeSegmentByteCount()))
assertData(payload.readByteString())
}
@Test fun serverMessageLengthLong() {
// Create a payload which will overflow the normal and short payload byte size.
val payload = Buffer()
while (payload.completeSegmentByteCount() <= PAYLOAD_SHORT_MAX) {
payload.writeByte('0'.code)
}
serverWriter.writeMessageFrame(OPCODE_BINARY, payload.snapshot())
// Write directly to the unbuffered sink. This ensures it will become single frame.
assertData("827f") // 'f' == 16-byte follow-up length.
assertData(format("%016X", payload.size))
assertData(payload.readByteString())
}
@Test fun clientBinary() {
val payload = ("60b420bb3851d9d47acb933dbe70399bf6c92da33af01d4fb770e98c0325f41d3ebaf8986da71" +
"2c82bcd4d554bf0b54023c2").decodeHex()
clientWriter.writeMessageFrame(OPCODE_BINARY, payload)
assertData("82b2")
assertData("60b420bb")
assertData(
"0000000058e5f96f1a7fb386dec41920967d0d185a443df4d7c4c9376391d4a65e0ed8230d1332734b796dee2" +
"b4495fb4376"
)
}
@Test fun serverEmptyClose() {
serverWriter.writeClose(0, null)
assertData("8800")
}
@Test fun serverCloseWithCode() {
serverWriter.writeClose(1001, null)
assertData("880203e9")
}
@Test fun serverCloseWithCodeAndReason() {
serverWriter.writeClose(1001, "Hello".encodeUtf8())
assertData("880703e948656c6c6f")
}
@Test fun clientEmptyClose() {
clientWriter.writeClose(0, null)
assertData("888060b420bb")
}
@Test fun clientCloseWithCode() {
clientWriter.writeClose(1001, null)
assertData("888260b420bb635d")
}
@Test fun clientCloseWithCodeAndReason() {
clientWriter.writeClose(1001, "Hello".encodeUtf8())
assertData("888760b420bb635d68de0cd84f")
}
@Test fun closeWithOnlyReasonThrows() {
clientWriter.writeClose(0, "Hello".encodeUtf8())
assertData("888760b420bb60b468de0cd84f")
}
@Test fun closeCodeOutOfRangeThrows() {
try {
clientWriter.writeClose(98724976, "Hello".encodeUtf8())
fail()
} catch (e: IllegalArgumentException) {
assertThat(e.message).isEqualTo("Code must be in range [1000,5000): 98724976")
}
}
@Test fun closeReservedThrows() {
try {
clientWriter.writeClose(1005, "Hello".encodeUtf8())
fail()
} catch (e: IllegalArgumentException) {
assertThat(e.message).isEqualTo("Code 1005 is reserved and may not be used.")
}
}
@Test fun serverEmptyPing() {
serverWriter.writePing(EMPTY)
assertData("8900")
}
@Test fun clientEmptyPing() {
clientWriter.writePing(EMPTY)
assertData("898060b420bb")
}
@Test fun serverPingWithPayload() {
serverWriter.writePing("Hello".encodeUtf8())
assertData("890548656c6c6f")
}
@Test fun clientPingWithPayload() {
clientWriter.writePing("Hello".encodeUtf8())
assertData("898560b420bb28d14cd70f")
}
@Test fun serverEmptyPong() {
serverWriter.writePong(EMPTY)
assertData("8a00")
}
@Test fun clientEmptyPong() {
clientWriter.writePong(EMPTY)
assertData("8a8060b420bb")
}
@Test fun serverPongWithPayload() {
serverWriter.writePong("Hello".encodeUtf8())
assertData("8a0548656c6c6f")
}
@Test fun clientPongWithPayload() {
clientWriter.writePong("Hello".encodeUtf8())
assertData("8a8560b420bb28d14cd70f")
}
@Test fun pingTooLongThrows() {
try {
serverWriter.writePing(binaryData(1000))
fail()
} catch (e: IllegalArgumentException) {
assertThat(e.message).isEqualTo(
"Payload size must be less than or equal to 125"
)
}
}
@Test fun pongTooLongThrows() {
try {
serverWriter.writePong((binaryData(1000)))
fail()
} catch (e: IllegalArgumentException) {
assertThat(e.message).isEqualTo(
"Payload size must be less than or equal to 125"
)
}
}
@Test fun closeTooLongThrows() {
try {
val longReason: ByteString = repeat('X', 124).encodeUtf8()
serverWriter.writeClose(1000, longReason)
fail()
} catch (e: IllegalArgumentException) {
assertThat(e.message).isEqualTo(
"Payload size must be less than or equal to 125"
)
}
}
private fun assertData(hex: String) {
assertData(hex.decodeHex())
}
private fun assertData(expected: ByteString) {
val actual = data.readByteString(Math.min(expected.size.toLong(), data.size))
assertThat(actual).isEqualTo(expected)
}
companion object {
private fun binaryData(length: Int): ByteString {
val junk = ByteArray(length)
Random(0).nextBytes(junk)
return junk.toByteString()
}
}
}
