the problem with using tauri Rust Commands

[hanxiaohuivc]

Hi everyone. I encountered a problem when using ‘Rust Commands’.
The problem is that I pass a parameter from js to rust and return a result. The code is as follows:
function rustwebapi() {
invoke('jstorustwebapi', {invokeMessage:'https://jsonplaceholder.typicode.com/posts/2' })
.then((message) => {
let textId = document.getElementById('#rustwebapi');
textId.val(JSON.stringify(message));
})
}

My rust code is as follows：

async fn get_post_as_string2(url: String) -> Result<String, Box> {
println!("get_post_as_string2:{}", url);
let s = reqwest::get(&url).await?.text().await?;
println!("get_post_as_string2:{}", s);
Ok(s)
}

async fn some_other_function(invoke_message: String) -> Option {
let webapistr = get_post_as_string2(invoke_message).await.unwrap();
Some(webapistr.into())
}

#[tauri::command]
async fn jstorustwebapi(invoke_message: String) -> Result<String, String> {
let result: Option = some_other_function(invoke_message).await;
if let Some(message) = result {
Ok(message.into())
} else {
Err("No result".into())
}
}

But when calling, the following error is returned:
thread'tokio-runtime-worker' panicked at'not currently running on a Tokio 0.2.x runtime.', C:\Users\hanxi.cargo\registry\src\github.com-1ecc6299db9ec823\tokio-0.2.25\ src\runtime\handle.rs:118:28
note: run with RUST_BACKTRACE=1 environment variable to display a backtrace

How to solve the problems? Thank you.

[FabianLars]

Hey. This error most likely stems from your specific rust code (in your jstorustwebapi command) and not from tauri itself. So either your code or one of your dependencies in rust is trying to use a heavily outdated version of tokio.
So check your rust code and dependencies and if you can't find it, please edit your question to show us your jstorustwebapi command code in rust.

[hanxiaohuivc]

My rust code is as follows, I am in the process of learning, so the rust code may be messy:

async fn get_post_as_string2(url: String) -> Result<String, Box> {
println!("get_post_as_string2:{}", url);
let s = reqwest::get(&url).await?.text().await?;
println!("get_post_as_string2:{}", s);
Ok(s)
}

async fn some_other_function(invoke_message: String) -> Option {
let webapistr = get_post_as_string2(invoke_message).await.unwrap();
Some(webapistr.into())
}

#[tauri::command]
async fn jstorustwebapi(invoke_message: String) -> Result<String, String> {
let result: Option = some_other_function(invoke_message).await;
if let Some(message) = result {
Ok(message.into())
} else {
Err("No result".into())
}
}

[hanxiaohuivc]

tokio = { version = "0.2", features = ["full"] }

[FabianLars]

i asked for the reqwest version :P But yeah tokio itself needs to be at version 1.x too (1.10 is the latest version i think).

You can also use this to check which dependencies are outdated: https://github.com/kbknapp/cargo-outdated

[hanxiaohuivc]

reqwest = { version = "0.10", features = ["json"] }

[FabianLars]

replace those with:

tokio = { version = "1.10", features = ["full"] }
reqwest = { version = "0.11", features = ["json"] }

and you should be good to go, if you don't have other dependencies like that :D

[hanxiaohuivc]

Hello. According to your guidance, my code can run normally, thank you very much. In addition, I have encountered some problems using tauri in linux, can you please pay attention to it? #2498 (comment)

[hanxiaohuivc]

@FabianLars According to your guidance, my code can run normally, thank you very much.
FabianLarstokio = { version = "1.10", features = ["full"] }
reqwest = { version = "0.11", features = ["json"] }