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use anyhow::{Context, Result};
use futures::stream::{select_all, unfold};
use http_body_util::Either;
use http_body_util::Full;
use hyper::header::{CONTENT_LENGTH, TRANSFER_ENCODING};
use hyper::server::conn::http1;
use hyper::server::conn::http2;
use hyper::service::service_fn;
use hyper::{Request, Response};
use hyper_util::rt::TokioIo;
use owo_colors::OwoColorize;
use std::net::SocketAddr;
use std::sync::Arc;
use tokio::net::TcpListener;
use tokio::task::LocalSet;
use tracing::{error, info};
use crate::delayed_body::DelayedBody;
use crate::execute_delay;
use crate::http::chunked_body_wire_size;
use crate::http::{request_head_size, response_head_size};
use crate::PORT_COUNTERS;
use crate::REQUESTS;
use crate::REQUEST_BYTES;
use crate::RESPONSES;
use crate::RESPONSE_BYTES;
use crate::create_listener;
use crate::options::Options;
use crate::pretty::collect_request;
use crate::pretty::PrettyPrint;
use crate::ServerConfig;
use futures::StreamExt;
async fn tokio_srv(
id: usize,
addrs: Vec<SocketAddr>,
std_listeners: Vec<std::net::TcpListener>,
config: Arc<ServerConfig>,
opts: &Options,
local: Option<&LocalSet>,
) -> Result<()> {
// Convert std listeners to tokio listeners
let listeners: Vec<TcpListener> = std_listeners
.into_iter()
.map(|l| TcpListener::from_std(l))
.collect::<std::result::Result<Vec<_>, std::io::Error>>()
.context("Failed to convert std listeners to tokio listeners")?;
info!("Thread {} listening on {:?}", id, addrs);
// Create futures
let mut all_listeners = select_all(listeners.into_iter().map(|l| {
let port = l.local_addr().unwrap().port();
Box::pin(unfold(l, move |listener| async move {
match listener.accept().await {
Ok((tcp_stream, _)) => Some((Ok((tcp_stream, port)), listener)),
Err(e) => Some((Err(e), listener)),
}
}))
}));
loop {
tokio::select! {
incoming = all_listeners.next() => {
match incoming {
Some(Ok((tcp_stream, port))) => {
let io = TokioIo::new(tcp_stream);
let config = config.clone();
let use_http2 = opts.http2;
let verbose = opts.verbose;
let delay = opts.delay;
let body_delay = opts.body_delay;
let meter = opts.meter;
let task = async move {
let service = service_fn(move |req: Request<hyper::body::Incoming>| {
let config = config.clone();
async move {
let (head_size, is_chunked) = if meter {
let hs = request_head_size(&req);
let chunked = req
.headers()
.get(TRANSFER_ENCODING)
.and_then(|v| v.to_str().ok())
.map(|s| s.contains("chunked"))
.unwrap_or(false);
(hs, chunked)
} else {
(0, false)
};
// Collect request body if metering or verbose mode is enabled
let collected_req = if meter || verbose > 0 {
collect_request(req).await.ok()
} else {
None
};
if meter {
let req_bytes_total = if let Some(ref req) = collected_req {
let body_bytes = req.0.body().len();
// For chunked encoding, calculate the wire format overhead
let body_size = if is_chunked {
chunked_body_wire_size(body_bytes)
} else {
body_bytes
};
head_size + body_size
} else {
head_size
};
REQUESTS.add(1);
REQUEST_BYTES.add(req_bytes_total);
let entry = PORT_COUNTERS.entry(port).or_default();
entry.requests.add(1);
entry.request_bytes.add(req_bytes_total);
}
if verbose > 0 {
if let Some(ref req) = collected_req {
println!("↩ {}:\n{}", "request".bold(), req.0.pretty(verbose));
if let Some(ref trailers) = req.1 {
println!("{}", trailers.pretty(verbose));
}
}
}
let mut builder = Response::builder().status(config.status);
// Add configured headers
for (k, v) in &config.headers {
builder = builder.header(k, v);
}
// Always add Content-Length
if !config.body.is_empty() {
builder = builder.header(CONTENT_LENGTH, config.body.len());
}
if let Some(delay) = delay {
execute_delay(delay).await;
}
let body = match body_delay {
Some(delay) => {
Either::Left(DelayedBody::new(Full::new(config.body.clone()), delay))
}
None => Either::Right(Full::new(config.body.clone())),
};
let resp = builder.body(body);
if let Ok(ref resp) = resp {
if meter {
let head_size = response_head_size(resp, config.body.len());
let res_bytes_total = head_size + config.body.len();
RESPONSES.add(1);
RESPONSE_BYTES.add(res_bytes_total);
let entry = PORT_COUNTERS.entry(port).or_default();
entry.responses.add(1);
entry.response_bytes.add(res_bytes_total);
}
if verbose > 0 {
// Create a response with Bytes body for printing
let mut print_builder = Response::builder().status(resp.status());
for (k, v) in resp.headers() {
print_builder = print_builder.header(k, v);
}
let print_resp = print_builder.body(config.body.clone()).unwrap();
println!("↪ {}:\n{}", "response".bold(), print_resp.pretty(verbose));
}
}
resp
}
});
let result = if use_http2 {
http2::Builder::new(hyper_util::rt::TokioExecutor::new())
.serve_connection(io, service)
.await
} else {
http1::Builder::new().serve_connection(io, service).await
};
if let Err(err) = result {
let protocol = if use_http2 { "HTTP/2" } else { "HTTP/1.1" };
error!("Error serving {} connection: {:?}", protocol, err);
}
};
if let Some(local) = local {
local.spawn_local(task);
} else {
tokio::task::spawn(task);
}
},
Some(Err(e)) => {
error!("Thread {} accept error on listener: {}", id, e);
}
None => {
error!("Thread {} all listeners closed", id);
break;
}
}
}
}
}
Ok(())
}
pub fn run_thread(
id: usize,
addr: Vec<SocketAddr>,
config: Arc<ServerConfig>,
opts: &Options,
) -> Result<()> {
// Standard Tokio single-thread runtime - create socket with SO_REUSEPORT
let std_listeners: Vec<std::net::TcpListener> = addr
.iter()
.map(|a| create_listener(a.clone(), opts))
.collect::<Result<Vec<_>>>()?;
let mut builder = tokio::runtime::Builder::new_current_thread();
let rt = builder
.enable_all()
.thread_name(format!("thread-{}", id))
.build()?;
rt.block_on(tokio_srv(id, addr, std_listeners, config, opts, None))
}
pub fn run_thread_local(
id: usize,
addr: Vec<SocketAddr>,
config: Arc<ServerConfig>,
opts: &Options,
) -> Result<()> {
// Standard Tokio single-thread runtime - create socket with SO_REUSEPORT
let std_listeners: Vec<std::net::TcpListener> = addr
.iter()
.map(|a| create_listener(a.clone(), opts))
.collect::<Result<Vec<_>>>()?;
let mut builder = tokio::runtime::Builder::new_current_thread();
let rt = builder
.enable_all()
.thread_name(format!("thread-{}", id))
.build()?;
rt.block_on(async move {
let local = LocalSet::new();
local
.run_until(tokio_srv(
id,
addr,
std_listeners,
config,
opts,
Some(&local),
))
.await
})
}