mirror of https://github.com/stjepang/smol
60 lines
1.7 KiB
Rust
60 lines
1.7 KiB
Rust
//! An HTTP+TLS client based on `async-h1` and `async-native-tls`.
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//!
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//! Run with:
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//!
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//! ```
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//! cargo run --example async-h1-client
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//! ```
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use anyhow::{bail, Context as _, Error, Result};
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use async_net::TcpStream;
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use blocking::block_on;
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use futures::prelude::*;
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use http_types::{Method, Request, Response};
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use url::Url;
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/// Sends a request and fetches the response.
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async fn fetch(req: Request) -> Result<Response> {
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// Figure out the host and the port.
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let host = req.url().host().context("cannot parse host")?.to_string();
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let port = req
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.url()
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.port_or_known_default()
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.context("cannot guess port")?;
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// Connect to the host.
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let addr = format!("{}:{}", host, port);
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let stream = TcpStream::connect(addr).await?;
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// Send the request and wait for the response.
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let resp = match req.url().scheme() {
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"http" => async_h1::connect(stream, req).await.map_err(Error::msg)?,
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"https" => {
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// In case of HTTPS, establish a secure TLS connection first.
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let stream = async_native_tls::connect(&host, stream).await?;
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async_h1::connect(stream, req).await.map_err(Error::msg)?
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}
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scheme => bail!("unsupported scheme: {}", scheme),
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};
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Ok(resp)
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}
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fn main() -> Result<()> {
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block_on(async {
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// Create a request.
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let addr = "https://www.rust-lang.org";
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let req = Request::new(Method::Get, Url::parse(addr)?);
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// Fetch the response.
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let mut resp = fetch(req).await?;
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println!("{:#?}", resp);
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// Read the message body.
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let mut body = Vec::new();
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resp.read_to_end(&mut body).await?;
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println!("{}", String::from_utf8_lossy(&body));
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Ok(())
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})
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}
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