func sendfile(c *net.TCPConn, f *os.File, fi os.FileInfo) {
sockFile, err := c.File()
if err != nil {
fmt.Fprint(c, Error(fmt.Sprintf("couldn't get file sock: %x", err)))
}
syscall.Sendfile(int(sockFile.Fd()), int(f.Fd()), nil, int(fi.Size()))
}
// sendFile copies the contents of r to c using the sendfile
// system call to minimize copies.
//
// if handled == true, sendFile returns the number of bytes copied and any
// non-EOF error.
//
// if handled == false, sendFile performed no work.
func sendFile(c *netFD, r io.Reader) (written int64, err error, handled bool) {
var remain int64 = 1 << 62 // by default, copy until EOF
lr, ok := r.(*io.LimitedReader)
if ok {
remain, r = lr.N, lr.R
if remain <= 0 {
return 0, nil, true
}
}
f, ok := r.(*os.File)
if !ok {
return 0, nil, false
}
if err := c.writeLock(); err != nil {
return 0, err, true
}
defer c.writeUnlock()
dst := c.sysfd
src := int(f.Fd())
for remain > 0 {
n := maxSendfileSize
if int64(n) > remain {
n = int(remain)
}
n, err1 := syscall.Sendfile(dst, src, nil, n)
if n > 0 {
written += int64(n)
remain -= int64(n)
}
if n == 0 && err1 == nil {
break
}
if err1 == syscall.EAGAIN {
if err1 = c.pd.WaitWrite(); err1 == nil {
continue
}
}
if err1 != nil {
// This includes syscall.ENOSYS (no kernel
// support) and syscall.EINVAL (fd types which
// don't implement sendfile)
err = err1
break
}
}
if lr != nil {
lr.N = remain
}
if err != nil {
err = os.NewSyscallError("sendfile", err)
}
return written, err, written > 0
}
// sendFile copies the contents of r to c using the sendfile
// system call to minimize copies.
//
// if handled == true, sendFile returns the number of bytes copied and any
// non-EOF error.
//
// if handled == false, sendFile performed no work.
func sendFile(c *netFD, r io.Reader) (written int64, err error, handled bool) {
var remain int64 = 1 << 62 // by default, copy until EOF
lr, ok := r.(*io.LimitedReader)
if ok {
remain, r = lr.N, lr.R
if remain <= 0 {
return 0, nil, true
}
}
f, ok := r.(*os.File)
if !ok {
return 0, nil, false
}
c.wio.Lock()
defer c.wio.Unlock()
if err := c.incref(false); err != nil {
return 0, err, true
}
defer c.decref()
dst := c.sysfd
src := int(f.Fd())
for remain > 0 {
n := maxSendfileSize
if int64(n) > remain {
n = int(remain)
}
n, err1 := syscall.Sendfile(dst, src, nil, n)
if n > 0 {
written += int64(n)
remain -= int64(n)
}
if n == 0 && err1 == nil {
break
}
if err1 == syscall.EAGAIN && c.wdeadline >= 0 {
if err1 = pollserver.WaitWrite(c); err1 == nil {
continue
}
}
if err1 != nil {
// This includes syscall.ENOSYS (no kernel
// support) and syscall.EINVAL (fd types which
// don't implement sendfile together)
err = &OpError{"sendfile", c.net, c.raddr, err1}
break
}
}
if lr != nil {
lr.N = remain
}
return written, err, written > 0
}
func doCopyFile(fin, fout fileish, fi os.FileInfo) error {
size := fi.Size()
var offset int64
for offset < size {
// sendfile is funny; it only copies up to maxint
// bytes at a time, but takes an int64 offset.
count := size - offset
if count > maxcp {
count = maxcp
}
if _, err := syscall.Sendfile(int(fout.Fd()), int(fin.Fd()), &offset, int(count)); err != nil {
return err
}
}
return nil
}
func sendFile(conn *net.TCPConn, fn string, offset int64) {
f, err := os.Open(fn)
if err != nil {
fmt.Println(err.Error())
return
}
nf, err := conn.File()
if err != nil {
fmt.Println(err.Error())
return
}
dst := nf.Fd()
for i := 0; i < 1000000; i++ {
_, err = syscall.Sendfile(int(dst), int(f.Fd()), &offset, 1033)
if err != nil {
fmt.Println(err.Error())
break
}
}
conn.CloseWrite()
}
// sendFile copies the contents of r to c using the sendfile
// system call to minimize copies.
//
// if handled == true, sendFile returns the number of bytes copied and any
// non-EOF error.
//
// if handled == false, sendFile performed no work.
func sendFile(c *netFD, r io.Reader) (written int64, err error, handled bool) {
// FreeBSD uses 0 as the "until EOF" value. If you pass in more bytes than the
// file contains, it will loop back to the beginning ad nauseam until it's sent
// exactly the number of bytes told to. As such, we need to know exactly how many
// bytes to send.
var remain int64 = 0
lr, ok := r.(*io.LimitedReader)
if ok {
remain, r = lr.N, lr.R
if remain <= 0 {
return 0, nil, true
}
}
f, ok := r.(*os.File)
if !ok {
return 0, nil, false
}
if remain == 0 {
fi, err := f.Stat()
if err != nil {
return 0, err, false
}
remain = fi.Size()
}
// The other quirk with FreeBSD's sendfile implementation is that it doesn't
// use the current position of the file -- if you pass it offset 0, it starts
// from offset 0. There's no way to tell it "start from current position", so
// we have to manage that explicitly.
pos, err := f.Seek(0, os.SEEK_CUR)
if err != nil {
return 0, err, false
}
if err := c.writeLock(); err != nil {
return 0, err, true
}
defer c.writeUnlock()
dst := c.sysfd
src := int(f.Fd())
for remain > 0 {
n := maxSendfileSize
if int64(n) > remain {
n = int(remain)
}
pos1 := pos
n, err1 := syscall.Sendfile(dst, src, &pos1, n)
if n > 0 {
pos += int64(n)
written += int64(n)
remain -= int64(n)
}
if n == 0 && err1 == nil {
break
}
if err1 == syscall.EAGAIN {
if err1 = c.pd.waitWrite(); err1 == nil {
continue
}
}
if err1 == syscall.EINTR {
continue
}
if err1 != nil {
// This includes syscall.ENOSYS (no kernel
// support) and syscall.EINVAL (fd types which
// don't implement sendfile)
err = err1
break
}
}
if lr != nil {
lr.N = remain
}
if err != nil {
err = os.NewSyscallError("sendfile", err)
}
return written, err, written > 0
}
// sendFile copies the contents of r to c using the sendfile
// system call to minimize copies.
//
// if handled == true, sendFile returns the number of bytes copied and any
// non-EOF error.
//
// if handled == false, sendFile performed no work.
func sendFile(c *netFD, r io.Reader) (written int64, err error, handled bool) {
var remain int64 = 1 << 62 // by default, copy until EOF
lr, ok := r.(*io.LimitedReader)
if ok {
remain, r = lr.N, lr.R
if remain <= 0 {
return 0, nil, true
}
}
f, ok := r.(*os.File)
if !ok {
return 0, nil, false
}
c.wio.Lock()
defer c.wio.Unlock()
c.incref()
defer c.decref()
if c.wdeadline_delta > 0 {
// This is a little odd that we're setting the timeout
// for the entire file but Write has the same issue
// (if one slurps the whole file into memory and
// do one large Write). At least they're consistent.
c.wdeadline = pollserver.Now() + c.wdeadline_delta
} else {
c.wdeadline = 0
}
dst := c.sysfd
src := f.Fd()
for remain > 0 {
n := maxSendfileSize
if int64(n) > remain {
n = int(remain)
}
n, errno := syscall.Sendfile(dst, src, nil, n)
if n > 0 {
written += int64(n)
remain -= int64(n)
}
if n == 0 && errno == 0 {
break
}
if errno == syscall.EAGAIN && c.wdeadline >= 0 {
pollserver.WaitWrite(c)
continue
}
if errno != 0 {
// This includes syscall.ENOSYS (no kernel
// support) and syscall.EINVAL (fd types which
// don't implement sendfile together)
err = &OpError{"sendfile", c.net, c.raddr, os.Errno(errno)}
break
}
}
if lr != nil {
lr.N = remain
}
return written, err, written > 0
}
func handle(conn net.Conn) {
var rerr, werr error
var wrote int
buf := make([]byte, 32*1024)
wrote, werr = conn.Write([]byte(headers))
if werr != nil {
log.Fatal("Error writing headers", werr)
}
if wrote != len([]byte(headers)) {
log.Fatal("Error: Wrote ", wrote, " headers bytes. Expected ", len([]byte(headers)))
}
outfile, ferr := conn.(*net.TCPConn).File()
if ferr != nil {
log.Fatal("Error getting conn fd", ferr)
}
outfd := int(outfile.Fd())
if outfd >= offsetsz {
growOffset(outfd)
}
currOffset := &offset[outfd]
for *currOffset < size {
wrote, werr = syscall.Sendfile(outfd, srcfd, currOffset, int(size))
if werr != nil {
log.Fatal("Sendfile error:", werr)
}
//log.Println("Sendfile wrote ", wrote)
}
//log.Println(outfd, ": Sendfile wrote: ", write)
offset[outfd] = 0
werr = conn.(*net.TCPConn).CloseWrite()
if werr != nil {
log.Println("Error on CloseWrite", werr)
}
// Consume input
for {
_, rerr = conn.Read(buf)
if rerr == io.EOF {
break
} else if rerr != nil {
log.Println("Error consuming read input: ", rerr)
break
}
}
werr = outfile.Close()
if werr != nil {
log.Println("Error on outfile Close", werr)
}
werr = conn.Close()
if werr != nil {
log.Println("Error on Close", werr)
}
}