// NewStreamReader returns a reader, which replays all the data generated by sw.
//
// The returned reader may be passed to Response.SetBodyStream.
//
// Close must be called on the returned reader after all the required data
// has been read. Otherwise goroutine leak may occur.
//
// See also Response.SetBodyStreamWriter.
func NewStreamReader(sw StreamWriter) io.ReadCloser {
	pc := fasthttputil.NewPipeConns()
	pw := pc.Conn1()
	pr := pc.Conn2()

	var bw *bufio.Writer
	v := streamWriterBufPool.Get()
	if v == nil {
		bw = bufio.NewWriter(pw)
	} else {
		bw = v.(*bufio.Writer)
		bw.Reset(pw)
	}

	go func() {
		defer func() {
			if r := recover(); r != nil {
				defaultLogger.Printf("panic in StreamWriter: %s\nStack trace:\n%s", r, debug.Stack())
			}
		}()

		sw(bw)
		bw.Flush()
		pw.Close()

		streamWriterBufPool.Put(bw)
	}()

	return pr
}
Exemple #2
0
func packFile(
	writer *tar.Writer, buffer *bufio.Writer, filePath string,
	relativePath string, info os.FileInfo) error {
	link := ""
	var err error
	if info.Mode()&os.ModeSymlink != 0 {
		link, err = os.Readlink(filePath)
		if err != nil {
			return err
		}
	}

	header, err := tar.FileInfoHeader(info, link)
	if err != nil {
		return err
	}

	// Build up the name of the file in the tar archive.
	header.Name = relativePath
	if runtime.GOOS == "windows" {
		if strings.Contains(header.Name, "/") {
			return fmt.Errorf("Forward slash in path when running on windows")
		}
		header.Name = strings.Replace(header.Name, string(os.PathSeparator), "/", -1)
	}
	if info.IsDir() && !strings.HasSuffix(header.Name, "/") {
		header.Name += "/"
	}

	err = writer.WriteHeader(header)
	if err != nil {
		return err
	}

	if header.Typeflag == tar.TypeReg {
		// Regular file. Write its contents.
		file, err := os.Open(filePath)
		if err != nil {
			return err
		}

		buffer.Reset(writer)
		_, err = io.Copy(buffer, file)
		if err != nil {
			file.Close()
			return err
		}
		err = file.Close()
		if err != nil {
			return err
		}
		err = buffer.Flush()
		if err != nil {
			return err
		}
	}
	return nil
}
Exemple #3
0
func addDockerfileToTar(srcPath string, tarWriter *tar.Writer, tmpWriter *bufio.Writer) error {
	fi, err := os.Lstat(srcPath)
	if err != nil {
		log.Errorf("Can't get file info: %s, error: %s", srcPath, err)
		return err
	}

	dockerfileToUpload := fileToUpload
	if fi.Mode().IsDir() {
		dockerfileToUpload = folderToUpload
	}

	tmpl, err := template.New("Dockerfile").Parse(dockerfileToUpload)
	if err != nil {
		return err
	}

	var buf bytes.Buffer
	if err := tmpl.Execute(&buf, struct {
		Src string
	}{
		Src: filepath.Base(srcPath),
	}); err != nil {
		log.Errorf("Can't execute template to upload: %s", err)
		return err
	}

	hdr, err := tar.FileInfoHeader(fi, "")
	if err != nil {
		log.Errorf("Can't get file info header: %s, error: %s", srcPath, err)
		return err
	}

	hdr.Name = DOCKERFILE
	hdr.Mode = 0100644 // Regular file + rw-r--r--
	hdr.Size = int64(buf.Len())
	hdr.ModTime = time.Now()
	hdr.Typeflag = tar.TypeReg
	hdr.Linkname = ""

	if err := tarWriter.WriteHeader(hdr); err != nil {
		log.Errorf("Can't write tar header: %s", err)
		return err
	}

	tmpWriter.Reset(tarWriter)
	defer tmpWriter.Reset(nil)
	if _, err := io.Copy(tmpWriter, &buf); err != nil {
		log.Errorf("Can't write Dockerfile to tar: %s", err)
		return err
	}
	if err := tmpWriter.Flush(); err != nil {
		log.Errorf("Can't flush Dockerfile to tar: %s", err)
		return err
	}

	return nil
}
Exemple #4
0
func (wpool *WriterPool) Put(writer *bufio.Writer) error {
	writer.Reset(nil)
	select {
	case wpool.buf <- writer:
	default:
		return errors.New("poolfull")
	}
	return nil
}
Exemple #5
0
func main() {
	var rp sync.Pool
	var wp sync.Pool

	for i := 0; i < 1024; i++ {
		rb := new([]byte)
		*rb = make([]byte, 2048)
		rp.Put(rb)
	}

	var counter uint32
	log.Fatal(nsk.ListenAndServe(":8000", func(conn *net.TCPConn) {

		var s string
		var c uint32
		var rb *[]byte
		var w *bufio.Writer

		if v := wp.Get(); v != nil {
			w = v.(*bufio.Writer)
			w.Reset(conn)
		} else {
			w = bufio.NewWriter(conn)
		}

		if v := rp.Get(); v != nil {
			rb = v.(*[]byte)
		} else {
			rb = new([]byte)
			*rb = make([]byte, 2048)
		}

		n, err := conn.Read(*rb)
		if err != nil || n <= 0 {
			goto E
		}

		c = atomic.AddUint32(&counter, 1)
		s = strconv.FormatUint(uint64(c), 10)

		w.WriteString("HTTP/1.1 200 OK\r\n")
		w.WriteString("Connection: close\r\n")
		w.WriteString(fmt.Sprintf("Content-Length: %d\r\n\r\n", len(s)))
		w.WriteString(s)
		w.Flush()

	E:
		conn.Close()
		rp.Put(rb)
		wp.Put(w)
	}))

}
Exemple #6
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// writeBackupStreamFromTarAndSaveMutatedFiles reads data from a tar stream and
// writes it to a backup stream, and also saves any files that will be mutated
// by the import layer process to a backup location.
func writeBackupStreamFromTarAndSaveMutatedFiles(buf *bufio.Writer, w io.Writer, t *tar.Reader, hdr *tar.Header, root string) (nextHdr *tar.Header, err error) {
	var bcdBackup *os.File
	var bcdBackupWriter *winio.BackupFileWriter
	if backupPath, ok := mutatedFiles[hdr.Name]; ok {
		bcdBackup, err = os.Create(filepath.Join(root, backupPath))
		if err != nil {
			return nil, err
		}
		defer func() {
			cerr := bcdBackup.Close()
			if err == nil {
				err = cerr
			}
		}()

		bcdBackupWriter = winio.NewBackupFileWriter(bcdBackup, false)
		defer func() {
			cerr := bcdBackupWriter.Close()
			if err == nil {
				err = cerr
			}
		}()

		buf.Reset(io.MultiWriter(w, bcdBackupWriter))
	} else {
		buf.Reset(w)
	}

	defer func() {
		ferr := buf.Flush()
		if err == nil {
			err = ferr
		}
	}()

	return backuptar.WriteBackupStreamFromTarFile(buf, t, hdr)
}
Exemple #7
0
// NewStreamReader returns a reader, which replays all the data generated by sw.
//
// The returned reader may be passed to Response.SetBodyStream.
//
// Close must be called on the returned reader after all the required data
// has been read. Otherwise goroutine leak may occur.
//
// See also Response.SetBodyStreamWriter.
func NewStreamReader(sw StreamWriter) io.ReadCloser {
	pc := fasthttputil.NewPipeConns()
	pw := pc.Conn1()
	pr := pc.Conn2()

	var bw *bufio.Writer
	v := streamWriterBufPool.Get()
	if v == nil {
		bw = bufio.NewWriter(pw)
	} else {
		bw = v.(*bufio.Writer)
		bw.Reset(pw)
	}

	go func() {
		sw(bw)
		bw.Flush()
		pw.Close()

		streamWriterBufPool.Put(bw)
	}()

	return pr
}
Exemple #8
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func putBufioWriter(bw *bufio.Writer) {
	bw.Reset(nil)
	if pool := bufioWriterPool(bw.Available()); pool != nil {
		pool.Put(bw)
	}
}
Exemple #9
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func (bcl *BufferedConnListener) putBufioWriter(bw *bufio.Writer) {
	bw.Reset(nil)
	bcl.bufioWriterPool.Put(bw)
}
Exemple #10
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func PutBufioWriter(pool *sync.Pool, bw *bufio.Writer) {
	bw.Reset(nil)
	pool.Put(bw)
}
Exemple #11
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func releaseWriter(s *Server, w *bufio.Writer) {
	w.Reset(nil)
	s.writerPool.Put(w)
}
Exemple #12
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func putBufioWriter(w *bufio.Writer) {
	w.Reset(nil)
	bufioWriterPool.Put(w)
}
Exemple #13
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func putBufioWriter(bw *bufio.Writer) {
	bw.Reset(nil)
	bufioWriterPool.Put(bw)
}
Exemple #14
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func releaseWriter(ctx *RequestCtx, w *bufio.Writer) {
	w.Reset(nil)
	ctx.s.writerPool.Put(w)
}
Exemple #15
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// Put puts the bufio.Writer back into the pool.
func (bufPool *BufioWriterPool) Put(b *bufio.Writer) {
	b.Reset(nil)
	bufPool.pool.Put(b)
}
Exemple #16
0
func addTarFile(path, name string, tw *tar.Writer, twBuf *bufio.Writer) error {
	fi, err := os.Lstat(path)
	if err != nil {
		return err
	}

	link := ""
	if fi.Mode()&os.ModeSymlink != 0 {
		if link, err = os.Readlink(path); err != nil {
			return err
		}
	}

	hdr, err := tar.FileInfoHeader(fi, link)
	if err != nil {
		return err
	}

	if fi.IsDir() && !strings.HasSuffix(name, "/") {
		name = name + "/"
	}

	hdr.Name = name

	stat, ok := fi.Sys().(*syscall.Stat_t)
	if ok {
		// Currently go does not fill in the major/minors
		if stat.Mode&syscall.S_IFBLK == syscall.S_IFBLK ||
			stat.Mode&syscall.S_IFCHR == syscall.S_IFCHR {
			hdr.Devmajor = int64(major(uint64(stat.Rdev)))
			hdr.Devminor = int64(minor(uint64(stat.Rdev)))
		}

	}

	capability, _ := system.Lgetxattr(path, "security.capability")
	if capability != nil {
		hdr.Xattrs = make(map[string]string)
		hdr.Xattrs["security.capability"] = string(capability)
	}

	if err := tw.WriteHeader(hdr); err != nil {
		return err
	}

	if hdr.Typeflag == tar.TypeReg {
		file, err := os.Open(path)
		if err != nil {
			return err
		}

		twBuf.Reset(tw)
		_, err = io.Copy(twBuf, file)
		file.Close()
		if err != nil {
			return err
		}
		err = twBuf.Flush()
		if err != nil {
			return err
		}
		twBuf.Reset(nil)
	}

	return nil
}
Exemple #17
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func (c *HostClient) releaseWriter(bw *bufio.Writer) {
	bw.Reset(nil)
	c.writerPool.Put(bw)
}