Re-Open #2945: AppSync realtime endpoint URL is not correct for AWS China regions

[wulianer]

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• I have searched for duplicate or closed issues and discussions.

Language and Async Model

Kotlin

Amplify Categories

GraphQL API

Gradle script dependencies

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Environment information

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Please include any relevant guides or documentation you're referencing

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Describe the bug

The latest 2.24.1 release note claims that it fixes the bug in ticket #2945 but actually it still exists.

This is the AppSync Endpoint URL (good for query/mutation methods):

https://6zjgfa5z5zh4ndlhyz12345678.appsync-api.cn-northwest-1.amazonaws.com.cn

This is the realtime Endpoint that the SDK 2.24.1 tries to access:

wss://6zjgfa5z5zh4ndlhyz12345678.appsync-api.cn-northwest-1.amazonaws.com.cn/graphql//realtime

which is not correct. It returns 404 and causes subscription failure.

The correct URL should be sth like this:

wss://6zjgfa5z5zh4ndlhyz12345678.appsync-realtime-api.cn-northwest-1.amazonaws.com.cn/graphql

Reproduction steps (if applicable)

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Code Snippet

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Log output

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amplifyconfiguration.json

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GraphQL Schema

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Additional information and screenshots

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[tylerjroach]

Thank you for the report. We will take a look

[vincetran]

@wulianer Can you provide a code snippet showing how you configured the CN region? I verified that the regex correctly identifies https://6zjgfa5z5zh4ndlhyz12345678.appsync-api.cn-northwest-1.amazonaws.com.cn as a "standard" endpoint and should generate the appsync-realtime-api domain but for some reason it's hitting the "custom" endpoint logic.

The smoking gun is this part of the endpoint that it's trying to hit: /graphql//realtime

The URL of the endpoint when it goes into the regex should not have a trailing / -- if you tried to test https://6zjgfa5z5zh4ndlhyz12345678.appsync-api.cn-northwest-1.amazonaws.com.cn/graphql/ it would fail and generate wss://6zjgfa5z5zh4ndlhyz12345678.appsync-api.cn-northwest-1.amazonaws.com.cn/graphql//realtime

[wulianer]

Thanks for the reply. Yes I did find the trailing / in my endpoint and after removing it, it works now.

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