Working with WebSockets on AWS

[@JGBSolutions]

I like the way you stay just calm and explain these things man. You got a new sub and an upvote.

[@RyanHLewis]

It is hard to stay calm when there are such cools things to do. :-D Thanks for the comment and sub!

[@abhibh1]

Best video on AWS websockets, great content, explanation!!!

[@thewisearchitect]

Very nice introduction and boiler plate demo for WebSockets on AWS. Thanks.

[@dloban]

Very good explanation, thank you! Hope to see more videos on the channel :)

[@JuriyBura]

Very well done! Well structured and up to the point!

[@P90Ez]

I tried to host my API on an EC2, it was terrible. Your tutorial helped. Thank you!

[@rajaramanv]

Great starting point for websocket implementation. Thank you!

[@RyanHLewis]

So glad to hear it! WebSockets are quite neat. :-D

[@dipikeshkumar1538]

Awesome Tutorial, very clear and to the point.

[@arpitanand6534]

Completely Agree, My Friend!

[@RyanHLewis]

Thanks so much!

[@MrHeadWorks]

3:36 PS5 stock checker 😂 Love it. Thank you for the great tutorial!

[@harymk]

how can send massage to all connected clients with out client id, or how can i use client id with out changing

[@yinko9082]

Awesome tutorial!!

[@RyanHLewis]

Thanks!

[@blanky_nap]

Recently watched your course on Pluralsicght, didn't know you have KZbin Channel 🔥

[@mrcharm767]

superb video ! more power to you brother.. why did u stop making amazing videos? your the guy we need

[@wepranaga]

nice format, I enjoy the demo

[@RyanHLewis]

Thanks so much! Glad you liked it! :-D

[@VideoAdnan]

Great video! In the browser console, why does it return 'undefined' before every response?

[@santosharakere]

Excellent demo. Thanks.

[@totsubo2000]

Superb video! Great production quality too. I'm studying system design and you really helped unblock me with a question I had around web sockets!! It would have be a cherry on top if you had written the connection id to a database and then used that to send a message. Just to show how your typical web message app handles 2 users chatting with each other ^_^

[@RyanHLewis]

Thanks so much! Glad it helped you! 😁

[@eR1cK92]

How looks your template in the websockets at response integration , I have an API wen sockets working with step function and my event needs a template and it doesn't allow receive the json

[@teosierranitro2022]

thanks, well explained!!!!!!!!

[@neilmorley5422]

Thanks for the tutorial. Really well explained and a perfect choice for a sample program. Simple , but totally effective, and covers comms in both directions.

[@augmentos]

When would NOT using a Lambda be better? What are the unknows if we use Lambda in this architecture for high volume use chat? Wish it was done with that explained, or not added. Thanks great vid.

[@ilanshtokhamer5841]

Question: Is this tutorial showing an example how to connect to a single web socket? or if multiple clients were to hit the url, there would be multiple sockets created?

[@progjr1062]

This lambda function only works for client? or can I have a server, and a client and use the lambda as bridge between them with the websocket?

[@converter]

Very clear step by step tutorial! +1

[@michaelwatkins3842]

Thanks for a very informative lesson!

[@RyanHLewis]

Glad you liked it! You're very welcome. :-D

[@omarosman7384]

Thank! Great tutorial But I am having this error: "errorMessage": "Cannot read properties of undefined (reading 'routeKey')", I think that problem is: we send the object over the socket like that: {action: "message"} so the event object which is the input for the lambda function does not have the "routeKey" key or any other keys, it just has the "action" key in the object How can we solve this?

[@spuzziboss1]

How would i implement rooms? so i can do a response to all users within one room

[@pajotrus]

quality video with the production level expected of youtubers with much bigger subscription amount. everything explained in an easy to understand way, step by step. one strange thing is that you have to specify the WebSockets ApiGateway endpoint in the lambda. We can put it in some env variable if we wanted to deploy to different stages via serverless framework, but that's still an additional thing to define. Any idea why can't they just pass it in the event or context argument of the lambda?

[@RyanHLewis]

Thanks so much for the kind word! And, you are absolutely correct about the endpoint. You could set it up as an environment variable, or make it even more flexible by using the endpoint from the event argument itself. Those are both better methods than what I did here, hardcoding it. Thanks for commenting!

[@animanamit7543]

Hi, just going through this tutorial and everytime I try to get a message back from AWS it's always "Internal server error" - I did not set up an S3 bucket because my use case doesn't require the messages to be saved. Any ideas on what it could be?

[@RyanHLewis]

Hi Animan. It sounds to me like there's an error with the Lambda. Have you looked at the logs in CloudWatch? That should tell you more about the error.

[@animanamit7543]

@@RyanHLewis So from the logs it seems that the lambda doesn't have permissions to use the execute API, and I've tried giving it the broadest permissions as well (ie /*/*/* ) but this still seems to be an issue

[@RyanHLewis]

@@animanamit7543 Hmm... and you've added the permissions like I did here? kzbin.info/www/bejne/kKbSi6OcaK-hj5o Maybe try just putting a single "*" in the "Resources" section so it will have access to execute anything. The other thing to check is typos in the policy document, and also that the policy is attached to the role that the lambda function is executing under.

[@animanamit7543]

@@RyanHLewis Yes everything looks good in terms of typos, although it won't let me add just a single * because it seems I need all field filled. This is what the JSON looks like for the inline policy, does it look correct? { "Version": "2012-10-17", "Statement": [ { "Sid": "VisualEditor0", "Effect": "Allow", "Action": "execute-api:*", "Resource": "arn:aws:execute-api:us-east-:/*/*/*" } ] }

[@RyanHLewis]

@@animanamit7543 That looks correct for the action and the resource does look okay, but clearly there's an issue. You should be able to use the asterisk. I verified in my account and it worked (saving at least, I didn't try the full access). Try this: { "Version": "2012-10-17", "Statement": [ { "Sid": "VisualEditor0", "Effect": "Allow", "Action": "execute-api:*", "Resource": "*" } ] } Or just simplify the resource like this: { "Version": "2012-10-17", "Statement": [ { "Sid": "VisualEditor0", "Effect": "Allow", "Action": "execute-api:*", "Resource": "arn:aws:execute-api:us-east-:/*" } ] } Here's some additional documentation that may be helpful: docs.aws.amazon.com/apigateway/latest/developerguide/apigateway-websocket-control-access-iam.html

[@apidas]

is aws maintain the connection between the clients and the lambda? you can just store the connection id in cache or something to send the response back to the user then

[@suryapratap3622]

Thanks a lot, I got a tutorial in one go...there are a lot of similar videos not as simpler as you have made it. @Ryan

[@principe.borodin]

I need send ordered data to websocket and receive ordered data too, but I sendo ordered data and I received random data. Can you make any idea what happens?

[@praveenkumar4644]

Is that the Form design patterns by Adam silver on the right side?

[@RyanHLewis]

Sharp eye! Actually, on the right side is "How to Solve It" by G. Polya and "High Performance Browser Networking" by Ilya Grigorik. Have you read either one?

[@zenmanproject]

This seems great for setting up a websockets server. But how about using a lambda function to connect to an existing websocket server? i.e. making a lambda websocket client. Do you have another video on that process?

[@thushan2960]

in this way can i chat with multiple instance at once ?

[@rickystah101]

i am having this error, can you help me to why routeKey is undefined? thanks { "errorType": "TypeError", "errorMessage": "Cannot read properties of undefined (reading 'routeKey')", "trace": [ "TypeError: Cannot read properties of undefined (reading 'routeKey')", " at Runtime.exports.handler (/var/task/index.js:14:44)", " at Runtime.handleOnce (file:///var/runtime/index.mjs:548:29)" ] }

[@omarosman7384]

I am having the same error We send the object over the socket like that: {action: "message"} so the event object which is the input for the lambda function does not have the "routeKey" key or any other keys, it just has the "action" key in the object Have you figured out how to solve this?

[@mayurdeore7875]

I am getting an CORS error in chrome while creating websocket object in angular project. In api gateway for Rest protocol we have option to enable CORS but don't have any for Websocket protocol. Can you please help here.

[@RyanHLewis]

Hi Mayur, websockets shouldn’t be blocked by CORS, as far as I know. Are you sure the error is actually coming from a websockets call? In my example, the websockets api and the site are not on the same origin, but there is no error. Should be the same for you.

[@mayurdeore7875]

@@RyanHLewis Yeah I am sure about it. Because it was working fine with socket.io and gives CORS error when using AWS websocket API link. Can you make a video on it as well? To use AWS websocket API from Angular application.

[@RyanHLewis]

@@mayurdeore7875 Hmm... that's interesting. I'd have to do more research on it. Unfortunately, I don't know Angular so I wouldn't be able to put a video together on it. If you find a solution for the CORS issue, please let me know!

[@bilmezonlar]

Amazing video.

[@brunonapoliribeiro8849]

great work, thanks bro

[@RyanHLewis]

Thanks so much!

[@anzo.p]

Beautiful

[@demetresaghliani9048]

That's the best video I've watched on this topic! However, I'm getting an "AccessDeniedException", even though I followed along and created and attached the inline policy to the letter. Adding AdministratorAccess fixed that, but that's obviously not a long-term solution. What's wrong?

[@RyanHLewis]

Hi Demetre, thanks so much! For the error, does it give you any additional information? Usually there's a message like "x cannot perform x on resource x". That would tell you the permission that's missing. The other thing is that it could be a typo in the resource ARN. You could try replacing that with an * and see if the works then.

[@marlonllano9677]

You're amazing man!! Could I do pretty much the same thing that you just did but with an ocpp server in python instead? thank you in advance

[@abdops]

Thanks for the great lesson. But please kill the noisy music in the background. It adds no value and it's fairly annoying.

[@RyanHLewis]

Thanks for the feedback! I'll keep it in mind in future videos.

[@phillipbell5235]

I gotta say your profile pic and the comment work perfectly together. I read it in the voice lol

[@stepheneshelman6028]

perfect!

[@vaibhavgandhi8719]

Hi Very nice tutorial, if can you please help me on cloudformation for aws websocket lambda and api that will be great help. Thanks!!!

[@bimanbd6968]

Thanks for the nice tutorial. Please don't include background music. very destructing and disturbing.

[@onemorelight2084]

Music is a distracor in this video.

[@alejosoft]

20:11 We don't give a ****.... we don't care about the message 😂

[@高瀬誠-p1i]

I noticed funny sticker ワニカニ　(Wani, Kani).

[@alanmoreno6330]

Thanks but you're not supposed to shake 8-balls

[@jiangnanlangzi2898]

Thanks, you are pretty cool!