[bug] Unable to load custom URI scheme

[SauvageThomas]

Describe the bug

Hi,

I would like to process images in Rust, then send them to the front to display them. From the example, it seems that a custom scheme protocol would be a good solution.

The problem, is that I'm completly unable to use it. I've looked at the streaming example in this repository, but I still can't make it work.

I'm using an that contains the URI photo://localhost/ and the image does not load and there is an error inside the console :

Reproduction

fn main() {
    tauri::Builder::default()
        .register_uri_scheme_protocol("photo", move |app, request| {
            println!("request: {:?}", request);
            ResponseBuilder::new()
                .mimetype("image/jpeg")
                .body(Vec::new())
        })
        .run(tauri::generate_context!())
        .expect("error while running tauri application");
}

<script setup>

import {ref} from 'vue'

const src = ref("photo://localhost/");
</script>

<template>
  <img :src="src"/>
</template>

<style scoped>

</style>

Expected behavior

No error in the console

Full tauri info output

cargo tauri info

[✔] Environment
    - OS: Windows 10.0.22631 X64
    ✔ WebView2: 124.0.2478.97
    ✔ MSVC: 
        - Visual Studio Build Tools�2019
        - Visual Studio Community 2022
    ✔ rustc: 1.78.0 (9b00956e5 2024-04-29)
    ✔ cargo: 1.78.0 (54d8815d0 2024-03-26)
    ✔ rustup: 1.27.1 (54dd3d00f 2024-04-24)
    ✔ Rust toolchain: stable-x86_64-pc-windows-msvc (environment override by RUSTUP_TOOLCHAIN)
    - node: 21.7.3
    - yarn: 1.22.22
    - npm: 10.5.0

[-] Packages
    - tauri [RUST]: 1.6.7
    - tauri-build [RUST]: 1.5.2
    - wry [RUST]: 0.24.10
    - tao [RUST]: 0.16.9
    - tauri-cli [RUST]: 1.5.11
    - @tauri-apps/api [NPM]: 1.5.3
    - @tauri-apps/cli [NPM]: 1.5.11

[-] App
    - build-type: bundle
    - CSP: unset
    - distDir: ../dist
    - devPath: http://localhost:1420/
    - framework: Vue.js
    - bundler: Vite

Stack trace

Failed to load resource: net::ERR_UNKNOWN_URL_SCHEME

Additional context

I even installed Pisano, as it was linked in a previous issue, but when running it I have the same issue.

[amaury-tobias]

Using register_asynchronous_uri_scheme_protocol and on font side Axios and got this error

On macOS work but if I select the request on the network panel from the debugger the app crashes with a : thread 'tokio-runtime-worker' panicked similar to #9177

[FabianLars]

@SauvageThomas the issue is that you're using the wrong url. On Windows it will be http://photo.localhost/ (https in v1). You may want to use tauri's convertFileSrc method to handle this and the url encoding.

@amaury-tobias I just assume it's the same issue and this is just another instance of chromium being confused and sending a generic cors error because it doesn't know better (though tbf in this case the cors error isn't even completely incorrect)

[SauvageThomas]

Thanks a lot for the quick answer, it works like a charm now