mirror of
https://source.quilibrium.com/quilibrium/ceremonyclient.git
synced 2024-11-15 04:35:17 +00:00
95 lines
2.9 KiB
Go
95 lines
2.9 KiB
Go
package quicreuse
|
|
|
|
import (
|
|
"bufio"
|
|
"fmt"
|
|
"io"
|
|
"os"
|
|
"time"
|
|
|
|
golog "github.com/ipfs/go-log/v2"
|
|
"github.com/klauspost/compress/zstd"
|
|
"github.com/quic-go/quic-go"
|
|
"github.com/quic-go/quic-go/logging"
|
|
"github.com/quic-go/quic-go/qlog"
|
|
)
|
|
|
|
var log = golog.Logger("quic-utils")
|
|
|
|
// QLOGTracer holds a qlog tracer dir, if qlogging is enabled (enabled using the QLOGDIR environment variable).
|
|
// Otherwise it is an empty string.
|
|
var qlogTracerDir string
|
|
|
|
func init() {
|
|
qlogTracerDir = os.Getenv("QLOGDIR")
|
|
}
|
|
|
|
func qloggerForDir(qlogDir string, p logging.Perspective, ci quic.ConnectionID) *logging.ConnectionTracer {
|
|
// create the QLOGDIR, if it doesn't exist
|
|
if err := os.MkdirAll(qlogDir, 0777); err != nil {
|
|
log.Errorf("creating the QLOGDIR failed: %s", err)
|
|
return nil
|
|
}
|
|
return qlog.NewConnectionTracer(newQlogger(qlogDir, p, ci), p, ci)
|
|
}
|
|
|
|
// The qlogger logs qlog events to a temporary file: .<name>.qlog.swp.
|
|
// When it is closed, it compresses the temporary file and saves it as <name>.qlog.zst.
|
|
// It is not possible to compress on the fly, as compression algorithms keep a lot of internal state,
|
|
// which can easily exhaust the host system's memory when running a few hundred QUIC connections in parallel.
|
|
type qlogger struct {
|
|
f *os.File // QLOGDIR/.log_xxx.qlog.swp
|
|
filename string // QLOGDIR/log_xxx.qlog.zst
|
|
*bufio.Writer // buffering the f
|
|
}
|
|
|
|
func newQlogger(qlogDir string, role logging.Perspective, connID quic.ConnectionID) io.WriteCloser {
|
|
t := time.Now().UTC().Format("2006-01-02T15-04-05.999999999UTC")
|
|
r := "server"
|
|
if role == logging.PerspectiveClient {
|
|
r = "client"
|
|
}
|
|
finalFilename := fmt.Sprintf("%s%clog_%s_%s_%s.qlog.zst", qlogDir, os.PathSeparator, t, r, connID)
|
|
filename := fmt.Sprintf("%s%c.log_%s_%s_%s.qlog.swp", qlogDir, os.PathSeparator, t, r, connID)
|
|
f, err := os.Create(filename)
|
|
if err != nil {
|
|
log.Errorf("unable to create qlog file %s: %s", filename, err)
|
|
return nil
|
|
}
|
|
return &qlogger{
|
|
f: f,
|
|
filename: finalFilename,
|
|
// The size of a qlog file for a raw file download is ~2/3 of the amount of data transferred.
|
|
// bufio.NewWriter creates a buffer with a buffer of only 4 kB, leading to a large number of syscalls.
|
|
Writer: bufio.NewWriterSize(f, 128<<10),
|
|
}
|
|
}
|
|
|
|
func (l *qlogger) Close() error {
|
|
defer os.Remove(l.f.Name())
|
|
defer l.f.Close()
|
|
if err := l.Writer.Flush(); err != nil {
|
|
return err
|
|
}
|
|
if _, err := l.f.Seek(0, io.SeekStart); err != nil { // set the read position to the beginning of the file
|
|
return err
|
|
}
|
|
f, err := os.Create(l.filename)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
defer f.Close()
|
|
buf := bufio.NewWriterSize(f, 128<<10)
|
|
c, err := zstd.NewWriter(buf, zstd.WithEncoderLevel(zstd.SpeedFastest), zstd.WithWindowSize(32*1024))
|
|
if err != nil {
|
|
return err
|
|
}
|
|
if _, err := io.Copy(c, l.f); err != nil {
|
|
return err
|
|
}
|
|
if err := c.Close(); err != nil {
|
|
return err
|
|
}
|
|
return buf.Flush()
|
|
}
|