HTTP/2 - nghttp2 server and golang 1.6 client

README.md

You need to run the build.sh to build the server and start it with ./server 0.0.0.0 3000 1 server.key server.crt. Assuming you've generated server.key and server.crt. If not, follow the instructions on http://www.akadia.com/services/ssh_test_certificate.html.

Once you've the server started, you can either use curl (with http2 support) or run the client with go run client.go. If you want to see debug logs of the underlying http2 implementation, run it as GODEBUG=http2debug=2 go run client.go.

build.sh

g++ -g -std=c++11 -o server -L/usr/local/opt/openssl/lib -I/usr/local/opt/openssl/include hello.cpp -lnghttp2_asio -lboost_system -lssl -lcrypto -lpthread

client.go

package main

import (
    "fmt"
    "io/ioutil"
    "log"
    "net/http"
    "crypto/tls"
    "golang.org/x/net/http2"
)

func main() {
    client := http.Client{
        // InsecureTLSDial is temporary and will likely be
        // replaced by a different API later.
        Transport: &http2.Transport{
            TLSClientConfig: &tls.Config{InsecureSkipVerify: true},
        },
    }

    resp, err := client.Get("https://localhost:3000/")
    if err != nil {
        log.Fatal(err)
    }

    body, err := ioutil.ReadAll(resp.Body)
    if err != nil {
        log.Fatal(err)
    }

    fmt.Println(string(body))
}

hello.cpp

/*
 * nghttp2 - HTTP/2 C Library
 *
 * Copyright (c) 2014 Tatsuhiro Tsujikawa
 *
 * Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sublicense, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 *
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */
// We wrote this code based on the original code which has the
// following license:
//
// main.cpp
// ~~~~~~~~
//
// Copyright (c) 2003-2013 Christopher M. Kohlhoff (chris at kohlhoff dot com)
//
// Distributed under the Boost Software License, Version 1.0. (See accompanying
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
//

#include <iostream>
#include <string>

#include <nghttp2/asio_http2_server.h>

using namespace nghttp2::asio_http2;
using namespace nghttp2::asio_http2::server;

int main(int argc, char *argv[]) {
  try {
    // Check command line arguments.
    if (argc < 4) {
      std::cerr
          << "Usage: asio-sv <address> <port> <threads> [<private-key-file> "
          << "<cert-file>]\n";
      return 1;
    }

    boost::system::error_code ec;

    std::string addr = argv[1];
    std::string port = argv[2];
    std::size_t num_threads = std::stoi(argv[3]);

    http2 server;

    server.num_threads(num_threads);

    server.handle("/", [](const request &req, const response &res) {
      res.write_head(200, {{"foo", {"bar"}}});
      res.end("hello, world\n");
    });
    server.handle("/secret/", [](const request &req, const response &res) {
      res.write_head(200);
      res.end("under construction!\n");
    });
    server.handle("/push", [](const request &req, const response &res) {
      boost::system::error_code ec;
      auto push = res.push(ec, "GET", "/push/1");
      if (!ec) {
        push->write_head(200);
        push->end("server push FTW!\n");
      }

      res.write_head(200);
      res.end("you'll receive server push!\n");
    });
    server.handle("/delay", [](const request &req, const response &res) {
      res.write_head(200);

      auto timer = std::make_shared<boost::asio::deadline_timer>(
          res.io_service(), boost::posix_time::seconds(3));
      auto closed = std::make_shared<bool>();

      res.on_close([timer, closed](uint32_t error_code) {
        timer->cancel();
        *closed = true;
      });

      timer->async_wait([&res, closed](const boost::system::error_code &ec) {
        if (ec || *closed) {
          return;
        }

        res.end("finally!\n");
      });
    });
    server.handle("/trailer", [](const request &req, const response &res) {
      // send trailer part.
      res.write_head(200, {{"trailers", {"digest"}}});

      std::string body = "nghttp2 FTW!\n";
      auto left = std::make_shared<size_t>(body.size());

      res.end([&res, body, left](uint8_t *dst, std::size_t len,
                                 uint32_t *data_flags) {
        auto n = std::min(len, *left);
        std::copy_n(body.c_str() + (body.size() - *left), n, dst);
        *left -= n;
        if (*left == 0) {
          *data_flags |=
              NGHTTP2_DATA_FLAG_EOF | NGHTTP2_DATA_FLAG_NO_END_STREAM;
          // RFC 3230 Instance Digests in HTTP.  The digest value is
          // SHA-256 message digest of body.
          res.write_trailer(
              {{"digest",
                {"SHA-256=qqXqskW7F3ueBSvmZRCiSwl2ym4HRO0M/pvQCBlSDis="}}});
        }
        return n;
      });
    });

    if (argc >= 6) {
      boost::asio::ssl::context tls(boost::asio::ssl::context::sslv23);
      tls.use_private_key_file(argv[4], boost::asio::ssl::context::pem);
      tls.use_certificate_chain_file(argv[5]);

      configure_tls_context_easy(ec, tls);

      if (server.listen_and_serve(ec, tls, addr, port)) {
        std::cerr << "error: " << ec.message() << std::endl;
      }
    } else {
      if (server.listen_and_serve(ec, addr, port)) {
        std::cerr << "error: " << ec.message() << std::endl;
      }
    }
  } catch (std::exception &e) {
    std::cerr << "exception: " << e.what() << "\n";
  }

  return 0;
}