Websocket: Invalid Handshake

[sho...@gmail.com]

Hi,

I'm new to gatling and websockets, so please bare with me on my inexperience.

I'm currently having issues getting my websocket to connect successfully. It seems to be due to the websocket handshake key received doesn't match the expected key.

I have included the logs I'm getting when running my simulation and a snippet of my script.

A basic understanding of my simulation is that I'm trying to simulate a client web application that communicates to the server through signalr. 

Here is the debug logs for the websocket connect part of my simulation (I redacted specific information).

11:11:40.381 [INFO ] i.g.h.a.w.WsConnect - Opening websocket 'gatling.http.webSocket': Scenario 'RecordedSimulation', UserId #1

11:11:40.403 [DEBUG] i.n.h.c.c.ZlibCodecFactory - -Dio.netty.noJdkZlibDecoder: false

11:11:40.404 [DEBUG] i.n.h.c.c.ZlibCodecFactory - -Dio.netty.noJdkZlibEncoder: false

11:11:40.451 [DEBUG] i.g.h.c.i.DefaultHttpClient - Installing SslHandler for wss://redacted.service.signalr.net/aspnetclient/connect?transport=webSockets&redactedParameters=1

11:11:40.501 [DEBUG] i.n.h.s.u.InsecureTrustManagerFactory - Accepting a server certificate: CN=*.service.signalr.net

11:11:40.577 [DEBUG] i.n.h.c.h.w.WebSocketClientHandshaker13 - WebSocket version 13 client handshake key: hzyAkxV1KZDGq65w38gxdg==, expected response: yYwx+PfP/pR49ZuwpnXsFoUC9P8=

11:11:40.578 [DEBUG] i.g.h.c.i.WebSocketHandler - ctx.write msg=DefaultFullHttpRequest(decodeResult: success, version: HTTP/1.1, content: UnpooledByteBufAllocator$InstrumentedUnpooledUnsafeHeapByteBuf(ridx: 0, widx: 0, cap: 0))

GET /aspnetclient/connect?transport=webSockets&redactedParameters=1 HTTP/1.1

User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/69.0.3497.100 Safari/537.36

Referer: https://redacted.azurewebsites.net/?redactedParameters=1

accept: */*

cookie: SIGNALRROUTE=redacted

origin: https://redacted.service.signalr.net

upgrade: websocket

connection: upgrade

sec-websocket-key: hzyAkxV1KZDGq65w38gxdg==

host: redacted.service.signalr.net

sec-websocket-origin: https://redacted.service.signalr.net

sec-websocket-version: 13

11:11:40.581 [DEBUG] i.n.h.s.SslHandler - [id: 0x105a7c19, L:/192.168.1.16:4859 - R:redacted.service.signalr.net/redactedIPaddress] HANDSHAKEN: TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256

11:11:40.635 [DEBUG] i.g.h.c.i.WebSocketHandler - Read msg=HttpObjectAggregator$AggregatedFullHttpResponse(decodeResult: success, version: HTTP/1.1, content: CompositeByteBuf(ridx: 0, widx: 26, cap: 26, components=1))

HTTP/1.1 404 Not Found

Date: Mon, 12 Nov 2018 19:11:39 GMT

Content-Type: text/plain

Connection: keep-alive

Vary: Accept-Encoding

Vary: Origin

Access-Control-Allow-Credentials: true

Access-Control-Allow-Origin: https://redacted.service.signalr.net

Strict-Transport-Security: max-age=15724800; includeSubDomains

content-length: 26

11:11:40.636 [DEBUG] i.g.h.c.i.WebSocketHandler - Crash

io.netty.handler.codec.http.websocketx.WebSocketHandshakeException: Invalid handshake response getStatus: 404 Not Found

        at io.netty.handler.codec.http.websocketx.WebSocketClientHandshaker13.verify(WebSocketClientHandshaker13.java:191)

        at io.netty.handler.codec.http.websocketx.WebSocketClientHandshaker.finishHandshake(WebSocketClientHandshaker.java:216)

        at io.gatling.http.client.impl.WebSocketHandler.channelRead(WebSocketHandler.java:122)

        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362)

        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348)

        at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:340)

        at io.netty.channel.ChannelInboundHandlerAdapter.channelRead(ChannelInboundHandlerAdapter.java:86)

        at io.netty.handler.codec.http.websocketx.extensions.WebSocketClientExtensionHandler.channelRead(WebSocketClientExtensionHandler.java:128)

        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362)

        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348)

        at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:340)

        at io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:102)

        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362)

        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348)

        at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:340)

        at io.netty.channel.CombinedChannelDuplexHandler$DelegatingChannelHandlerContext.fireChannelRead(CombinedChannelDuplexHandler.java:438)

        at io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:323)

        at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:297)

        at io.netty.channel.CombinedChannelDuplexHandler.channelRead(CombinedChannelDuplexHandler.java:253)

        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362)

        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348)

        at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:340)

        at io.netty.handler.ssl.SslHandler.unwrap(SslHandler.java:1429)

        at io.netty.handler.ssl.SslHandler.decodeJdkCompatible(SslHandler.java:1199)

        at io.netty.handler.ssl.SslHandler.decode(SslHandler.java:1243)

        at io.netty.handler.codec.ByteToMessageDecoder.decodeRemovalReentryProtection(ByteToMessageDecoder.java:502)

        at io.netty.handler.codec.ByteToMessageDecoder.callDecode(ByteToMessageDecoder.java:441)

        at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:278)

        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362)

        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348)

        at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:340)

        at io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1434)

        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362)

        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348)

        at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:965)

        at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:163)

        at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:644)

        at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:579)

        at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:496)

        at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:458)

        at io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:897)

        at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)

        at java.lang.Thread.run(Unknown Source)

11:11:40.638 [DEBUG] i.g.h.c.i.WebSocketHandler - channelInactive

11:11:40.644 [DEBUG] i.g.h.c.i.WebSocketHandler - Crash

io.gatling.http.client.impl.WebSocketHandler$1: Premature close

11:11:40.646 [DEBUG] i.g.h.a.w.f.WsActor - Connect failed: None:i.n.h.c.h.w.WebSocketHandshakeException: Invalid handshake response getStatus: 404 Not Found, no remaining tries, going to Crashed state and performing next action

Here's a snippet of my simulation code (I redacted specific information).

/* negotiate signalr connection and get required tokens to pass with correlation  */

// get signalr service access from website        
.exec(http("request_96")

.get("https://redacted.azurewebsites.net"+ "/signalr/negotiate?redactedParameters=1)

.headers(headers_96)

        .check(status.is(200))

        .check(

                jsonPath("$.Token")

                .find

                .saveAs("token")))

        )

// get signalr connection information
.exec(http("request_99")

.get("https:/redacted.service.signalr.net/aspnetclient" + "/negotiate?redactedParameters=1)

.headers(headers_100)

        .check(

                jsonPath("$.Connection")

                .find

                .saveAs("connection"))))

        )

        

// Connect to signalr with websocket

.exec(ws("Connect WS")

        .connect(session => "wss:/redacted.service.signalr.net/aspnetclient" + "/connect?transport=webSockets&redactedParameters=1)

            .headers(ws_headers))

        .pause(10)

        

// start signalr listener

        .exec(http("request_101")

.get("https:/redacted.service.signalr.net/aspnetclient" + "/start?transport=webSockets&redactedParameters=1)

.headers(headers_100)

        .check(

                jsonPath("$.Response")

                .find

                .is("started"))

         ))

            

//commented out ping for right now

/*    

// wait 5 minutes and then ping to keep connection open

.pause(300)

.exec(http("request_110")

.get("https:/redacted.service.signalr.net/aspnetclient" + "/ping?redactedParameters=1)

.headers(headers_100)

*/

.exec(ws("Close WS").close)

[Stéphane LANDELLE]

Hi,

Your server responded with 404 to the request Gatling sent for opening the WebSocket.

There's a chance the url you're trying to connect to is incorrect.

Stéphane Landelle

GatlingCorp CTO

slan...@gatling.io

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[sho...@gmail.com]

Thank you for the reply. It seems the issue was related to the signalr server. After an update of the server, Gatling is able to open a websocket connection.