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//
// sfive
//
// sfive - spreadspace streaming statistics suite is a generic
// statistic collection tool for streaming server infrastuctures.
// The system collects and stores meta data like number of views
// and throughput from a number of streaming servers and stores
// it in a global data store.
// The data acquisition is designed to be generic and extensible in
// order to support different streaming software.
// sfive also contains tools and applications to filter and visualize
// live and recorded data.
//
//
// Copyright (C) 2014-2017 Christian Pointner <equinox@spreadspace.org>
// Markus Grüneis <gimpf@gimpf.org>
//
// This file is part of sfive.
//
// sfive is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License version 3
// as published by the Free Software Foundation.
//
// sfive is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with sfive. If not, see <http://www.gnu.org/licenses/>.
//
package sfive
import (
"bytes"
"io"
"net"
)
const (
PipegramMessageSizeLimit = 1024 * 1024 // TODO: is this really needed?
)
//
// Unix Socket Interface (streams)
//
func (srv Server) pipeHandle(conn net.Conn) {
defer conn.Close()
dec, err := NewStatefulDecoder(conn)
if err != nil {
s5l.Printf("pipe: failed to read init message: %v\n", err)
return
}
slug := dec.Slug()
s5l.Printf("pipe: new connection: %s\n", slug)
defer func() {
s5l.Printf("pipe(%s): connection closed\n", slug)
}()
for {
update, err := dec.Decode()
if err != nil {
if err == io.EOF {
break
}
// TODO: send NACK?
opErr, isOpErr := err.(*net.OpError)
if isOpErr && opErr.Temporary() {
s5l.Printf("pipe(%s): failed to read data message: %v (temporary error)\n", slug, err)
} else {
s5l.Printf("pipe(%s): failed to read data message: %v\n", slug, err)
break
}
}
if err = srv.Ingest(update); err != nil {
s5l.Printf("pipe(%s): failed to store data: %v\n", slug, err)
// TODO: send NACK?
break
}
// TODO: send ACK?
}
}
func (srv Server) ServePipe(pipePath string) {
ln, err := net.Listen("unix", pipePath)
if err != nil {
s5l.Printf("pipe: failed to connect: %v", err)
return
}
defer ln.Close()
for {
conn, err := ln.Accept()
if err != nil {
s5l.Printf("pipe: failed accept: %v", err)
// ignore
continue
}
go srv.pipeHandle(conn)
}
}
//
// Unix Socket Interface (datagrams)
//
func (srv Server) pipegramHandle(pconn net.PacketConn) {
buffer := make([]byte, PipegramMessageSizeLimit)
for {
n, _, err := pconn.ReadFrom(buffer)
if err != nil {
s5l.Printf("pipegram: failed read: %v", err)
continue
}
data := buffer[0:n]
update, err := NewStatelessDecoder(bytes.NewReader(data)).Decode()
if err != nil {
s5l.Printf("pipegram: failed to decode data message: %v\n", err)
continue
}
if err = srv.Ingest(update); err != nil {
s5l.Printf("pipegram: failed to store data: %v\n", err)
}
}
}
func (srv Server) ServePipegram(pipePath string) {
pconn, err := net.ListenPacket("unixgram", pipePath)
if err != nil {
s5l.Printf("pipegram: failed to listen: %v", err)
return
}
defer pconn.Close()
srv.pipegramHandle(pconn)
}
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