func createAttachment(stream *spdystream.Stream) (*os.File, error) {
if stream.IsFinished() {
return nil, fmt.Errorf("stream already finished")
}
socketFds, socketErr := syscall.Socketpair(syscall.AF_LOCAL, syscall.SOCK_STREAM|syscall.FD_CLOEXEC, 0)
if socketErr != nil {
return nil, socketErr
}
pipe := os.NewFile(uintptr(socketFds[1]), "")
defer pipe.Close()
conn, connErr := net.FileConn(pipe)
if connErr != nil {
return nil, connErr
}
go func() {
io.Copy(conn, stream)
conn.Close()
}()
go func() {
io.Copy(stream, conn)
}()
return os.NewFile(uintptr(socketFds[0]), ""), nil
}
func createStreamMessage(stream *spdystream.Stream, mode int, streamChans streamChanProvider, ret libchan.Sender) (*libchan.Message, error) {
dataString := stream.Headers()["Data"]
if len(dataString) != 1 {
if len(dataString) == 0 {
return nil, fmt.Errorf("Stream(%s) is missing data header", stream)
} else {
return nil, fmt.Errorf("Stream(%s) has multiple data headers", stream)
}
}
data, decodeErr := base64.URLEncoding.DecodeString(dataString[0])
if decodeErr != nil {
return nil, decodeErr
}
var attach *os.File
if !stream.IsFinished() {
socketFds, socketErr := syscall.Socketpair(syscall.AF_LOCAL, syscall.SOCK_STREAM|syscall.FD_CLOEXEC, 0)
if socketErr != nil {
return nil, socketErr
}
attach = os.NewFile(uintptr(socketFds[0]), "")
conn, connErr := net.FileConn(os.NewFile(uintptr(socketFds[1]), ""))
if connErr != nil {
return nil, connErr
}
go func() {
io.Copy(conn, stream)
}()
go func() {
io.Copy(stream, conn)
}()
}
retSender := ret
if retSender == nil || libchan.RetPipe.Equals(retSender) {
retSender = &StreamSender{stream: stream, streamChans: streamChans}
}
if mode&libchan.Ret == 0 {
retSender.Close()
}
return &libchan.Message{
Data: data,
Fd: attach,
Ret: retSender,
}, nil
}
func createStreamMessage(stream *spdystream.Stream, mode int, streamChans streamChanProvider, ret beam.Sender) (*beam.Message, error) {
verbString := stream.Headers()["Verb"]
if len(verbString) != 1 {
if len(verbString) == 0 {
return nil, fmt.Errorf("Stream(%s) is missing verb header", stream)
} else {
return nil, fmt.Errorf("Stream(%s) has multiple verb headers", stream)
}
}
verb, verbOk := verbs[verbString[0]]
if !verbOk {
return nil, fmt.Errorf("Unknown verb: %s", verbString[0])
}
var args []string
argString := stream.Headers()["Args"]
if len(argString) > 1 {
return nil, fmt.Errorf("Stream(%s) has multiple args headers", stream)
}
if len(argString) == 1 {
var err error
args, err = decodeArgs(argString[0])
if err != nil {
return nil, err
}
}
var attach *os.File
if !stream.IsFinished() {
socketFds, socketErr := syscall.Socketpair(syscall.AF_LOCAL, syscall.SOCK_STREAM|syscall.FD_CLOEXEC, 0)
if socketErr != nil {
return nil, socketErr
}
attach = os.NewFile(uintptr(socketFds[0]), "")
conn, connErr := net.FileConn(os.NewFile(uintptr(socketFds[1]), ""))
if connErr != nil {
return nil, connErr
}
go func() {
io.Copy(conn, stream)
}()
go func() {
io.Copy(stream, conn)
}()
}
retSender := ret
if retSender == nil || beam.RetPipe.Equals(retSender) {
retSender = &StreamSender{stream: stream, streamChans: streamChans}
}
if mode&beam.Ret == 0 {
retSender.Close()
}
return &beam.Message{
Verb: verb,
Args: args,
Att: attach,
Ret: retSender,
}, nil
}
