Cross Origin Resource Sharing (CORS) - Explained with Example & Demo | API Gateway & Lambda

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CORS (Cross origin Resource Sharing) can be confusing. In this video, we going to tackle it once and for all! We will learn the following. Timestamps given below as well.
1. What does Cross-origin mean?
2. What is CORS (Cross Origin Resource Sharing)?
3. What is CORS Pre-Flight?
4. How does CORS work with Amazon API Gateway?
5. Simple Vs Non-Simple Cross Origin
6. Multi origin CORS using Lambda
7. Demo for all the cases above!
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TIMESTAMPS
00:00 What is CORS
01:47 Simple Vs Non-simple CORS
02:50 CORS flow with preflight check explained (DON'T SKIP)
07:07 CORS Demo with API Gateway
15:50 Multi origin CORS with Lambda
21:14 Simple CORS API Demo

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Опубликовано:

4 июл 2024

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Комментарии : 52

@cloudwithraj 3 года назад

Timestamps added since we cover lot of stuff in this video. Hope this helps your viewing experience.

@snaidu70 3 года назад

Raj, all your explanations are very good. I cannot thank you enough.

@mohammadikram687 3 года назад

Whenever i see your videos it's like jackpot of a knowledge. You are doing a great work sir🙏🙏❤️. I was confused about postman requests to my springboot Microservices in which we don't need any cors policy but now i know why we dnt need that.

@zaheer13165 3 года назад

Thanks alot dude, You explanation was so easy to follow. i got the concepts now.

@nickdube7881 2 года назад

Thank you so much. I was struggling with the CORS error between my API and my S3 bucket for days until I watched your video. I really appreciate your work!

@cloudwithraj 2 года назад

Glad it helped Nick!

@israilkarud9293 3 года назад

Great explanation ❤️

@pasumarthijahnavi123 3 года назад

I have created a load balancer for a service(spring). I am trying to use the balancer URL in my angular Proj. I am getting this Cros error. Is there any solution for this? In the spring service controller do I need to use cross-origin annotation and deploy in that particular environment (or) should I add anything else? Please help me with this :)

@carlosalvarez-cascos5225 3 года назад

Good explanation, I followed your tips. Thanks. Still I keep getting an error when requesting data from javascript to my aws REST api , with lambda in the backend. Things go well until I enable cache, still works from sometime and then it fails with your fetch "has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource. If an opaque response serves your needs, set the request's mode to 'no-cors' to fetch the resource with CORS disabled.". I just flush the cache and works again from different origins. Any idea?

@SahilKaironVlogs 2 года назад

Great video Raj. It would have been a plus if you would have added about access control expose headers. I was a little confused with that.

@sardonyx_ Год назад

What a fantastic explanation of CORS with API Gateway! Thanks Raj!! I'm sharing this with my coworkers!

@cloudwithraj Год назад

Glad it was helpful! Ty for the kind gesture of sharing with your co-workers

@vrindavaneshwari_ju_ki_kripa 3 года назад

Luv u sir. U solved my problem!!!

@betterwithrum 2 года назад

I couldn't get mine to work until the last section demo where you showed adding the header. Nothing worked until I did that.

@abhinavpratapsingh4445 2 года назад

Can't we send array of origins in access control allow origin via integration response or lambda?

@PriThVi_RedDy 2 года назад

@AgentofChange This is awesome. Can you also please share this sort of projects on Git. That is so helpful.

@harshverm776 2 года назад

Hi, When I am enabling cors the all conditions are not passing some are failing. What can I do in this case? For you all passed.

@elvissanchez2703 2 года назад

Thank you! :)

@jonbrown7962 3 года назад

Thanks for the explanation of CORS. So, in the slide, you have the browser sending the pre-flight OPTIONS request specifing the origin. Then it gets a response, then sends the get request. But in your example code, It's just sending the get request. But when you open the network tab in dev tools, it DID make the OPTIONS request. How do you get that behavior without coding it explicitly? I've got a project hitting API Gateway, but there's no options requests to begin with.

@protonb6090 Год назад

the browser is doing that part automatically, you always code for GET only and you get an OPTIONS + GET

@krugerbrent4270 2 года назад

Really good explanation! Thanks man.

@cloudwithraj 2 года назад

Thanks Mr. Darth Vader 🚀

@vishwasgupta3180 3 года назад

Great

@deepteshagrawal 2 года назад

I am confused...how at the very first place...browser has sent a Preflight check when it was not enabled for non simple requests? while for Simple request demo...it didn't and the cors is also not enabled...then it should pass the request.

@GoluKidsLearning174 2 года назад

I found it most useful video on CORS in youtube

@cloudwithraj 2 года назад

Glad it was helpful!

@fssalihb 2 года назад

you saved my life thanks, very thourogh explanation

@cloudwithraj 2 года назад

Glad it helped!

@harithzainudin9594 2 года назад

i really like the way you explain. from now onwards. looking forward for all of your video.. im new to aws and i watch a lot of your video to learn! please do more on explaination and tutorial! you get a like, subscribe and share from me! thank you so much :)

@cloudwithraj 2 года назад

Thanks Harith, so glad my videos are helping your AWS journey. Thanks for the like, sub, and share 🙏

@wangpengce6618 3 года назад

Thanks a lot! Really nice explanation.

@cloudwithraj 3 года назад

Glad it was helpful!

@cassianoperes2062 3 года назад

Pretty nice

@ngneerin 3 года назад

Please do a video on AWS HTTP API Gateway CORS, specially for cookies

@atulsinghbankoti750 4 года назад

nice explanation of CORS...

@cloudwithraj 4 года назад

Glad you liked it. Thanks for watching!

@rationalsage1084 3 года назад

Nice video. Is there a book you read to learn this stuff?

@cloudwithraj 3 года назад

I read the developer guide from AWS Michael. They are the best source of info. However, there is lot of info in the guide, I try to extract the relevant info for folks for these videos. I am glad you liked the video. Thanks for watching.

@afitani 3 года назад

Thank you. Can you please share a video for CORS configuration on HTTP API.

@cloudwithraj 3 года назад

Will keep this in mind Toyam for future videos.

@altma61 Год назад

Thanks

@cloudwithraj Год назад

Ty so much Alexandru for the super thanks. Very very appreciated. Glad that the content was helpful 🙌

@arivumanis 4 года назад

👌

@bigboss-ku3wy 4 года назад

Hey Arivu, good day to you. may I know where do you work? Your linkedin profile? I have some doubts in AWS and I'm from AP

@arivumanis 4 года назад

@@bigboss-ku3wy Hi thanks for your interest, I suggest check out the Udemy course "Rocking AWS CloudFormation, CDK with DevOps, Interview Guide " by Rajdeep Saha(same person of this RU-vid channel) which helped me a lot and he can clarify any doubts.