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use std::convert::TryFrom;
use async_std::io::BufReader;
use isahc::config::Configurable;
use isahc::{http, ResponseExt};
use crate::Config;
use super::{async_trait, Body, Error, HttpClient, Request, Response};
#[derive(Debug)]
pub struct IsahcClient {
client: isahc::HttpClient,
config: Config,
}
impl Default for IsahcClient {
fn default() -> Self {
Self::new()
}
}
impl IsahcClient {
pub fn new() -> Self {
Self::from_client(isahc::HttpClient::new().unwrap())
}
pub fn from_client(client: isahc::HttpClient) -> Self {
Self {
client,
config: Config::default(),
}
}
}
#[async_trait]
impl HttpClient for IsahcClient {
async fn send(&self, mut req: Request) -> Result<Response, Error> {
let mut builder = http::Request::builder()
.uri(req.url().as_str())
.method(http::Method::from_bytes(req.method().to_string().as_bytes()).unwrap());
for (name, value) in req.iter() {
builder = builder.header(name.as_str(), value.as_str());
}
let body = req.take_body();
let body = match body.len() {
Some(len) => isahc::Body::from_reader_sized(body, len as u64),
None => isahc::Body::from_reader(body),
};
let request = builder.body(body).unwrap();
let res = self.client.send_async(request).await.map_err(Error::from)?;
let maybe_metrics = res.metrics().cloned();
let (parts, body) = res.into_parts();
let body = Body::from_reader(BufReader::new(body), None);
let mut response = http_types::Response::new(parts.status.as_u16());
for (name, value) in &parts.headers {
response.append_header(name.as_str(), value.to_str().unwrap());
}
if let Some(metrics) = maybe_metrics {
response.ext_mut().insert(metrics);
}
response.set_body(body);
Ok(response)
}
fn set_config(&mut self, config: Config) -> http_types::Result<()> {
let mut builder =
isahc::HttpClient::builder().max_connections_per_host(config.max_connections_per_host);
if !config.http_keep_alive {
builder = builder.connection_cache_size(0);
}
if config.tcp_no_delay {
builder = builder.tcp_nodelay();
}
if let Some(timeout) = config.timeout {
builder = builder.timeout(timeout);
}
self.client = builder.build()?;
self.config = config;
Ok(())
}
fn config(&self) -> &Config {
&self.config
}
}
impl TryFrom<Config> for IsahcClient {
type Error = isahc::Error;
fn try_from(config: Config) -> Result<Self, Self::Error> {
let mut builder = isahc::HttpClient::builder();
if !config.http_keep_alive {
builder = builder.connection_cache_size(0);
}
if config.tcp_no_delay {
builder = builder.tcp_nodelay();
}
if let Some(timeout) = config.timeout {
builder = builder.timeout(timeout);
}
Ok(Self {
client: builder.build()?,
config,
})
}
}
#[cfg(test)]
mod tests {
use super::*;
use async_std::prelude::*;
use async_std::task;
use http_types::url::Url;
use http_types::Result;
use std::time::Duration;
fn build_test_request(url: Url) -> Request {
let mut req = Request::new(http_types::Method::Post, url);
req.set_body("hello");
req.append_header("test", "value");
req
}
#[async_std::test]
async fn basic_functionality() -> Result<()> {
let port = portpicker::pick_unused_port().unwrap();
let mut app = tide::new();
app.at("/").all(|mut r: tide::Request<()>| async move {
let mut response = tide::Response::new(http_types::StatusCode::Ok);
response.set_body(r.body_bytes().await.unwrap());
Ok(response)
});
let server = task::spawn(async move {
app.listen(("localhost", port)).await?;
Result::Ok(())
});
let client = task::spawn(async move {
task::sleep(Duration::from_millis(100)).await;
let request =
build_test_request(Url::parse(&format!("http://localhost:{}/", port)).unwrap());
let mut response: Response = IsahcClient::new().send(request).await?;
assert_eq!(response.body_string().await.unwrap(), "hello");
Ok(())
});
server.race(client).await?;
Ok(())
}
}