docs: rust

docs/en/05-develop/01-connect/04-rust.md

@@ -9,14 +9,14 @@ import TabItem from '@theme/TabItem';
 ## Create Project
 
 ```
-cargo new cloud_example
+cargo new --bin cloud-example
 ```
 ## Add Dependency
 
 Add dependency to `Cargo.toml`. 
 
 ```toml title="Cargo.toml"
-{{#include docs/examples/rust/cloud_example/Cargo.toml}}
+{{#include docs/examples/rust/cloud-example/Cargo.toml}}
 ```
 
 ## Config
@@ -59,7 +59,7 @@ Replace  <DSN\> with real TDengine cloud DSN. To obtain the real value, please l
 Copy following code to `main.rs`.
 
 ```rust title="main.rs"
-{{#include docs/examples/rust/cloud_example/src/main.rs}}
+{{#include docs/examples/rust/cloud-example/src/main.rs}}
 ```
 
 Then you can execute `cargo run` to test the connection.
\ No newline at end of file

docs/examples/rust/cloud_example/Cargo.toml → docs/examples/rust/cloud-example/Cargo.toml

 [package]
-name = "cloud_example"
+name = "cloud-example"
 version = "0.1.0"
 edition = "2021"
 
@@ -9,4 +9,4 @@ edition = "2021"
 [dependencies]
 libtaos = { version="0.4.5-alpha.0", features=["rest"]}
 tokio = { version = "1", features = ["full"]}
-anyhow = "*"
+anyhow = "1.0.0" 

docs/examples/rust/cloud_example/src/main.rs → docs/examples/rust/cloud-example/src/main.rs

@@ -3,7 +3,7 @@ use libtaos::*;
 
 #[tokio::main]
 async fn main() -> Result<()> {
-    let dsn = std::env::var("TDENGINE_CLOUD_DSN").unwrap();
+    let dsn = std::env::var("TDENGINE_CLOUD_DSN")?;
     let cfg = TaosCfg::from_dsn(dsn)?;
     let conn = cfg.connect()?;
     let _ = conn.query("show databases").await?;