I'm trying to test the hyper crate which is an http client. I simply pasted the example from the github:
#![deny(warnings)]
#![warn(rust_2018_idioms)]
use std::env;
use hyper::{body::HttpBody as _, Client};
use tokio::io::{self, AsyncWriteExt as _};
// A simple type alias so as to DRY.
type Result<T> = std::result::Result<T, Box<dyn std::error::Error + Send + Sync>>;
#[tokio::main]
async fn main() -> Result<()> {
pretty_env_logger::init();
// Some simple CLI args requirements...
let url = match env::args().nth(1) {
Some(url) => url,
None => {
println!("Usage: client <url>");
return Ok(());
}
};
// HTTPS requires picking a TLS implementation, so give a better
// warning if the user tries to request an 'https' URL.
let url = url.parse::<hyper::Uri>().unwrap();
if url.scheme_str() != Some("http") {
println!("This example only works with 'http' URLs.");
return Ok(());
}
fetch_url(url).await
}
async fn fetch_url(url: hyper::Uri) -> Result<()> {
let client = Client::new();
let mut res = client.get(url).await?;
println!("Response: {}", res.status());
println!("Headers: {:#?}\n", res.headers());
// Stream the body, writing each chunk to stdout as we get it
// (instead of buffering and printing at the end).
while let Some(next) = res.data().await {
let chunk = next?;
io::stdout().write_all(&chunk).await?;
}
println!("\n\nDone!");
Ok(())
}
Here's my Cargo.toml:
[package]
name = "hyper_http_custom_transport"
version = "0.1.0"
edition = "2018"
# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
[dependencies]
hyper = "0.14"
tokio = { version = "1", features = ["full"] }
But I'm getting errors:
error[E0277]: the size for values of type `[u8]` cannot be known at compilation time
--> src/main.rs:46:25
|
46 | let chunk = next?;
| ^ doesn't have a size known at compile-time
and many others like
error[E0432]: unresolved import `hyper::Client`
--> src/main.rs:5:34
|
5 | use hyper::{body::HttpBody as _, Client};
| ^^^^^^ no `Client` in the root
What is wrong?