Part 3. 编写 Client 端

上一节中,我们编写完成了 server 端,现在让我们来编写我们的 client 端并调用我们的 server 端。

首先,创建一个文件 src/bin/client.rs,输入以下内容:

use lazy_static::lazy_static;
use std::net::SocketAddr;

lazy_static! {
    static ref CLIENT: volo_gen::volo::example::ItemServiceClient = {
        let addr: SocketAddr = "127.0.0.1:8080".parse().unwrap();
        volo_gen::volo::example::ItemServiceClientBuilder::new("volo-example")
            .address(addr)
            .build()
    };
}

#[volo::main]
async fn main() {
    let req = volo_gen::volo::example::GetItemRequest { id: 1024 };
    let resp = CLIENT.clone().get_item(req).await;
    match resp {
        Ok(info) => tracing::info!("{:?}", info),
        Err(e) => tracing::error!("{:?}", e),
    }
}

然后,在 Cargo.toml 文件中加入所需的依赖,加入后的文件如下:

[package]
name = "volo-example"
version = "0.1.0"
edition = "2021"

# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html

[dependencies]
anyhow = "1"
async-trait = "0.1"
lazy_static = "1"
tokio = { version = "1", features = ["full"] }
tracing = "0.1"
prost = "0.11"

pilota = "*"
volo =  "*"        # we recommend to use the latest framework version for new features and bug fixes
volo-grpc =  "*"  # we recommend to use the latest framework version for new features and bug fixes

volo-gen = { path = "./volo-gen" }

[profile.release]
opt-level = 3
debug = true
debug-assertions = false
overflow-checks = false
lto = true
panic = 'unwind'
incremental = false
codegen-units = 1
rpath = false

[workspace]
members = ["volo-gen"]
resolver = "2"

接着,新建一个 terminal,执行以下命令,把我们的 server 端跑起来:

$ cargo run --bin server

最后,我们再回到当前目录,执行以下命令,即可看到执行成功(这时候没有日志输出,因为我们没有给 tracing 设置 subscriber,大家可以自行选择对应的库):

$ cargo run --bin client

大功告成!


最后修改 December 2, 2022 : chore: add lark footer link (#460) (f41a884)