/
main.go
152 lines (127 loc) · 3.73 KB
/
main.go
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package main
import (
"crypto/rand"
"fmt"
"io"
"net"
"time"
"github.com/Sirupsen/logrus"
"github.com/augustoroman/speedtester/speedtest"
"github.com/dustin/go-humanize"
"gopkg.in/alecthomas/kingpin.v2"
)
func randomize(b []byte) {
logrus.Printf("Randomizing %s buffer", humanize.IBytes(uint64(len(b))))
rand.Read(b)
}
func main() {
download := kingpin.Command("download", "Check download speed from server.")
downloadServer := download.Arg("server", "Server address, including port").String()
upload := kingpin.Command("upload", "Check upload speed from server.")
uploadServer := upload.Arg("server", "Server address, including port").String()
serve := kingpin.Command("serve", "Start a server that clients can connect to.")
serveAddr := serve.Flag("addr", "Address to serve on.").Default(":5555").String()
chunkSize := kingpin.Flag("chunk-size", "Size of each buffer chunk").Short('c').Default("64KB").Bytes()
bufferSize := kingpin.Flag("buffer-size", "Total buffer size").Short('s').Default("16MiB").Bytes()
cmd := kingpin.Parse()
megaBuffer := make([]byte, *bufferSize)
numChunks := int(*bufferSize / *chunkSize)
buffers := make(chan []byte, numChunks+10)
for i := 0; i < numChunks; i++ {
buffers <- megaBuffer[int(*chunkSize)*i : int(*chunkSize)*(i+1)]
}
switch cmd {
case serve.FullCommand():
randomize(megaBuffer)
(server{buffers, *serveAddr}).run()
case upload.FullCommand():
randomize(megaBuffer)
doUpload(buffers, *uploadServer)
case download.FullCommand():
doDownload(buffers, *downloadServer)
}
}
func doUpload(buffers chan []byte, addr string) {
conn, err := net.Dial("tcp", addr)
if err != nil {
logrus.Fatalf("Cannot connect to %v: %v", addr, err)
}
logrus.Printf("Connected to %s: Uploading", addr)
io.WriteString(conn, "upload")
stats := newLogger(fmt.Sprintf("Server %v", addr))
if err := speedtest.Provide(conn, buffers, buffers, stats); err != nil {
logrus.Fatal(err)
}
stats <- speedtest.Stats{} // flush the last entry.
close(stats)
logrus.Print("Done")
}
func doDownload(buffers chan []byte, addr string) {
conn, err := net.Dial("tcp", addr)
if err != nil {
logrus.Fatalf("Cannot connect to %v: %v", addr, err)
}
logrus.Printf("Connected to %s: Downloading", addr)
io.WriteString(conn, "download")
stats := newLogger(fmt.Sprintf("Server %v", addr))
if err := speedtest.Consume(conn, buffers, buffers, stats); err != nil {
logrus.Fatal(err)
}
stats <- speedtest.Stats{} // flush the last entry.
close(stats)
logrus.Print("Done")
}
type server struct {
buffers chan []byte
addr string
}
func (s server) run() {
l, err := net.Listen("tcp", s.addr)
if err != nil {
logrus.Fatal(err)
}
logrus.Printf("Listening on %s", s.addr)
for {
conn, err := l.Accept()
if err != nil {
logrus.Errorf("Connection failure: %v", err)
continue
}
go s.handleConn(conn)
}
}
func (s server) handleConn(c net.Conn) {
client := fmt.Sprintf("Client %v", c.RemoteAddr())
logrus.Printf("%s: Connected", client)
defer c.Close()
stats := newLogger(client)
defer close(stats)
// for {
var op [256]byte
n, err := c.Read(op[:])
if err != nil {
logrus.Errorf("%s: failure: %v", client, err)
return
}
switch string(op[:n]) {
case "bye":
logrus.Printf("%s: goodbye", client)
return
case "upload":
if err := speedtest.Consume(c, s.buffers, s.buffers, stats); err != nil {
logrus.Errorf("%s: failed upload: %v", client, err)
return
}
case "download":
if err := speedtest.Provide(c, s.buffers, s.buffers, stats); err != nil {
logrus.Errorf("%s: failed download: %v", client, err)
return
}
}
// }
}
func newLogger(prefix string) chan speedtest.Stats {
stats := make(chan speedtest.Stats) // unbuffered
go speedtest.Report(prefix, time.Second, stats)
return stats
}