[macOS] APP crash when a web custom protocol request is aborted before or during response

[idootop]

Describe the bug

When initiating a register_uri_scheme_protocol request from the web side, if the web aborts the request before or during the response, the macOS APP crashes.

Reproduction

• Register a register_asynchronous_uri_scheme_protocol.
• From the web side, initiate a request using this protocol and abort the request before the response.
• The APP crashes 100% of the time.

Expected behavior

• Before responding, the responder should check if the request has been canceled. If the request has been canceled, do not send the response.
• Or, during the response, catch exceptions to prevent the APP from crashing and quitting abruptly when the request is terminated.

Full tauri info output

[✔] Environment
    - OS: Mac OS 13.6.3 X64
    ✔ Xcode Command Line Tools: installed
    ✔ rustc: 1.76.0 (07dca489a 2024-02-04)
    ✔ cargo: 1.76.0 (c84b36747 2024-01-18)
    ✔ rustup: 1.26.0 (5af9b9484 2023-04-05)
    ✔ Rust toolchain: stable-x86_64-apple-darwin (default)
    - node: 18.17.1
    - pnpm: 8.15.4
    - npm: 9.6.7

[-] Packages
    - tauri [RUST]: 2.0.0-beta.10
    - tauri-build [RUST]: 2.0.0-beta.8
    - wry [RUST]: 0.37.0
    - tao [RUST]: 0.26.1
    - @tauri-apps/api [NPM]: 2.0.0-beta.5
    - @tauri-apps/cli [NPM]: 2.0.0-beta.9

[-] App
    - build-type: bundle
    - CSP: default-src x-http: x-https: blob: data: filesystem: ws: http: https: 'unsafe-eval' 'unsafe-inline'
    - frontendDist: ../feiyu/dist
    - devUrl: http://localhost:3000/

Stack trace

thread 'tokio-runtime-worker' panicked at /Users/mac/.cargo/registry/src/index.crates.io-6f17d22bba15001f/wry-0.37.0/src/wkwebview/mod.rs:262:28:
Uncaught exception <NSException: 0x10428cf30>

Additional context

Related code:

wry/src/wkwebview/mod.rs

Line 272 in 5789bf7

let () = msg_send![task, didReceiveResponse: response];

Related issue: tauri-apps/tauri#9177

[morajabi]

Seems like this is the cause of #1142?

[morajabi]

Do you have an idea on how to fix this issue?

[FabianLars]

#1214

[darkskygit]

any update? this bug prevents me from developing on a Mac and requires me to develop in a Windows virtual machine

[FabianLars]

@darkskygit Would you happen to have a minimal reproduction example (or any kind of reproduction)?

[darkskygit]

@darkskygit Would you happen to have a minimal reproduction example (or any kind of reproduction)?

https://github.com/darkskygit/tauri-custom-uri-schema-crash

the latest commit will make tauri crash in mac

[FabianLars]

Does this only happen with http / https and other known/native schemes? WKWebView does not allow registering schemes that it already handles by default so it makes sense if it crashes then.

[darkskygit]

Does this only happen with http / https and other known/native schemes? WKWebView does not allow registering schemes that it already handles by default so it makes sense if it crashes then.

i tried to register a custom schema, and it indeed no longer causes a crash
Is there any other way to forward requests under certain paths (e.g., /api/*) to Rust? Using custom paths or invoke requires a lot of changes to the front-end code, and registering http:// works well on windows

[FabianLars]

Not that i know of. Windows also only works by accident here. Once we drop win7 support tauri will use a different api for the custom protocol which would break your implementation.

After that you could use the request intercept api we currently use on windows for the custom protocol of course (example) but there's no equivalent on linux/macos as long as we're stuck with the current webviews.

[darkskygit]

Not that i know of. Windows also only works by accident here. Once we drop win7 support tauri will use a different api for the custom protocol which would break your implementation.

After that you could use the request intercept api we currently use on windows for the custom protocol of course (example) but there's no equivalent on linux/macos as long as we're stuck with the current webviews.

if it is not possible to register a custom protocol for http under linux/macos, how does tauri respond to static files?
can I use the same method to register a custom handler?
my current implementation can also return frontend static assets, so it is acceptable for my custom handler to respond to all requests but not only /api/*