pingora 0.8.0

A framework to build fast, reliable and programmable networked systems at Internet scale.
Documentation 
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// Copyright 2026 Cloudflare, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

use async_trait::async_trait;
use bytes::Bytes;
use http::{Response, StatusCode};
use log::debug;
use once_cell::sync::Lazy;
use pingora_timeout::timeout;
use prometheus::{register_int_counter, IntCounter};
use std::sync::Arc;
use std::time::Duration;
use tokio::io::{AsyncReadExt, AsyncWriteExt};

use pingora::apps::http_app::ServeHttp;
use pingora::apps::ServerApp;
use pingora::protocols::http::ServerSession;
use pingora::protocols::Stream;
use pingora::server::ShutdownWatch;

static REQ_COUNTER: Lazy<IntCounter> =
    Lazy::new(|| register_int_counter!("reg_counter", "Number of requests").unwrap());

#[derive(Clone)]
pub struct EchoApp;

#[async_trait]
impl ServerApp for EchoApp {
    async fn process_new(
        self: &Arc<Self>,
        mut io: Stream,
        _shutdown: &ShutdownWatch,
    ) -> Option<Stream> {
        let mut buf = [0; 1024];
        loop {
            let n = io.read(&mut buf).await.unwrap();
            if n == 0 {
                debug!("session closing");
                return None;
            }
            io.write_all(&buf[0..n]).await.unwrap();
            io.flush().await.unwrap();
        }
    }
}

pub struct HttpEchoApp;

#[async_trait]
impl ServeHttp for HttpEchoApp {
    async fn response(&self, http_stream: &mut ServerSession) -> Response<Vec<u8>> {
        REQ_COUNTER.inc();
        // read timeout of 2s
        let read_timeout = 2000;
        let body = match timeout(
            Duration::from_millis(read_timeout),
            http_stream.read_request_body(),
        )
        .await
        {
            Ok(res) => match res.unwrap() {
                Some(bytes) => bytes,
                None => Bytes::from("no body!"),
            },
            Err(_) => {
                panic!("Timed out after {:?}ms", read_timeout);
            }
        };

        Response::builder()
            .status(StatusCode::OK)
            .header(http::header::CONTENT_TYPE, "text/html")
            .header(http::header::CONTENT_LENGTH, body.len())
            .body(body.to_vec())
            .unwrap()
    }
}