package main
import (
"bufio"
"crypto/md5"
"errors"
"flag"
"fmt"
"io"
"io/ioutil"
"log"
"mime/multipart"
"net/http"
"os"
"strconv"
"strings"
"sync"
_ "net/http/pprof"
"github.com/lucas-clemente/quic-go"
"github.com/lucas-clemente/quic-go/http3"
"github.com/lucas-clemente/quic-go/internal/testdata"
"github.com/lucas-clemente/quic-go/internal/utils"
"github.com/lucas-clemente/quic-go/logging"
"github.com/lucas-clemente/quic-go/qlog"
"github.com/lucas-clemente/quic-go/quictrace"
)
type binds []string
func (b binds) String() string {
return strings.Join(b, ",")
}
func (b *binds) Set(v string) error {
*b = strings.Split(v, ",")
return nil
}
// Size is needed by the /demo/upload handler to determine the size of the uploaded file
type Size interface {
Size() int64
}
// See https://en.wikipedia.org/wiki/Lehmer_random_number_generator
func generatePRData(l int) []byte {
res := make([]byte, l)
seed := uint64(1)
for i := 0; i < l; i++ {
seed = seed * 48271 % 2147483647
res[i] = byte(seed)
}
return res
}
var tracer quictrace.Tracer
func init() {
tracer = quictrace.NewTracer()
}
func exportTraces() error {
traces := tracer.GetAllTraces()
if len(traces) != 1 {
return errors.New("expected exactly one trace")
}
for _, trace := range traces {
f, err := os.Create("trace.qtr")
if err != nil {
return err
}
if _, err := f.Write(trace); err != nil {
return err
}
f.Close()
fmt.Println("Wrote trace to", f.Name())
}
return nil
}
type tracingHandler struct {
handler http.Handler
}
var _ http.Handler = &tracingHandler{}
func (h *tracingHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
h.handler.ServeHTTP(w, r)
if err := exportTraces(); err != nil {
log.Fatal(err)
}
}
func setupHandler(www string, trace bool) http.Handler {
mux := http.NewServeMux()
if len(www) > 0 {
mux.Handle("/", http.FileServer(http.Dir(www)))
} else {
mux.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
fmt.Printf("%#v\n", r)
const maxSize = 1 << 30 // 1 GB
num, err := strconv.ParseInt(strings.ReplaceAll(r.RequestURI, "/", ""), 10, 64)
if err != nil || num <= 0 || num > maxSize {
w.WriteHeader(400)
return
}
w.Write(generatePRData(int(num)))
})
}
mux.HandleFunc("/demo/tile", func(w http.ResponseWriter, r *http.Request) {
// Small 40x40 png
w.Write([]byte{
0x89, 0x50, 0x4e, 0x47, 0x0d, 0x0a, 0x1a, 0x0a, 0x00, 0x00, 0x00, 0x0d,
0x49, 0x48, 0x44, 0x52, 0x00, 0x00, 0x00, 0x28, 0x00, 0x00, 0x00, 0x28,
0x01, 0x03, 0x00, 0x00, 0x00, 0xb6, 0x30, 0x2a, 0x2e, 0x00, 0x00, 0x00,
0x03, 0x50, 0x4c, 0x54, 0x45, 0x5a, 0xc3, 0x5a, 0xad, 0x38, 0xaa, 0xdb,
0x00, 0x00, 0x00, 0x0b, 0x49, 0x44, 0x41, 0x54, 0x78, 0x01, 0x63, 0x18,
0x61, 0x00, 0x00, 0x00, 0xf0, 0x00, 0x01, 0xe2, 0xb8, 0x75, 0x22, 0x00,
0x00, 0x00, 0x00, 0x49, 0x45, 0x4e, 0x44, 0xae, 0x42, 0x60, 0x82,
})
})
mux.HandleFunc("/demo/tiles", func(w http.ResponseWriter, r *http.Request) {
io.WriteString(w, "")
for i := 0; i < 200; i++ {
fmt.Fprintf(w, `
`, i)
}
io.WriteString(w, "")
})
mux.HandleFunc("/demo/echo", func(w http.ResponseWriter, r *http.Request) {
body, err := ioutil.ReadAll(r.Body)
if err != nil {
fmt.Printf("error reading body while handling /echo: %s\n", err.Error())
}
w.Write(body)
})
// accept file uploads and return the MD5 of the uploaded file
// maximum accepted file size is 1 GB
mux.HandleFunc("/demo/upload", func(w http.ResponseWriter, r *http.Request) {
if r.Method == http.MethodPost {
err := r.ParseMultipartForm(1 << 30) // 1 GB
if err == nil {
var file multipart.File
file, _, err = r.FormFile("uploadfile")
if err == nil {
var size int64
if sizeInterface, ok := file.(Size); ok {
size = sizeInterface.Size()
b := make([]byte, size)
file.Read(b)
md5 := md5.Sum(b)
fmt.Fprintf(w, "%x", md5)
return
}
err = errors.New("couldn't get uploaded file size")
}
}
if err != nil {
utils.DefaultLogger.Infof("Error receiving upload: %#v", err)
}
}
io.WriteString(w, ``)
})
if !trace {
return mux
}
return &tracingHandler{handler: mux}
}
func main() {
// defer profile.Start().Stop()
go func() {
log.Println(http.ListenAndServe("localhost:6060", nil))
}()
// runtime.SetBlockProfileRate(1)
verbose := flag.Bool("v", false, "verbose")
bs := binds{}
flag.Var(&bs, "bind", "bind to")
www := flag.String("www", "", "www data")
tcp := flag.Bool("tcp", false, "also listen on TCP")
trace := flag.Bool("trace", false, "enable quic-trace")
enableQlog := flag.Bool("qlog", false, "output a qlog (in the same directory)")
flag.Parse()
logger := utils.DefaultLogger
if *verbose {
logger.SetLogLevel(utils.LogLevelDebug)
} else {
logger.SetLogLevel(utils.LogLevelInfo)
}
logger.SetLogTimeFormat("")
if len(bs) == 0 {
bs = binds{"localhost:6121"}
}
handler := setupHandler(*www, *trace)
quicConf := &quic.Config{}
if *trace {
quicConf.QuicTracer = tracer
}
if *enableQlog {
quicConf.Tracer = qlog.NewTracer(func(_ logging.Perspective, connID []byte) io.WriteCloser {
filename := fmt.Sprintf("server_%x.qlog", connID)
f, err := os.Create(filename)
if err != nil {
log.Fatal(err)
}
log.Printf("Creating qlog file %s.\n", filename)
return utils.NewBufferedWriteCloser(bufio.NewWriter(f), f)
})
}
var wg sync.WaitGroup
wg.Add(len(bs))
for _, b := range bs {
bCap := b
go func() {
var err error
if *tcp {
certFile, keyFile := testdata.GetCertificatePaths()
err = http3.ListenAndServe(bCap, certFile, keyFile, nil)
} else {
server := http3.Server{
Server: &http.Server{Handler: handler, Addr: bCap},
QuicConfig: quicConf,
}
err = server.ListenAndServeTLS(testdata.GetCertificatePaths())
}
if err != nil {
fmt.Println(err)
}
wg.Done()
}()
}
wg.Wait()
}