// Handles incoming requests for both TCP and UDP
func handleGraphiteTextProtocol(rcvr *receiver.Receiver, conn net.Conn, timeout int) {
defer conn.Close() // decrements graceful.TcpWg
if timeout != 0 {
conn.SetDeadline(time.Now().Add(time.Duration(timeout) * time.Second))
}
// We use the Scanner, becase it has a MaxScanTokenSize of 64K
connbuf := bufio.NewScanner(conn)
for connbuf.Scan() {
packetStr := connbuf.Text()
if name, ts, v, err := parseGraphitePacket(packetStr); err != nil {
log.Printf("handleGraphiteTextProtocol(): bad backet: %v")
} else {
rcvr.QueueDataPoint(name, ts, v)
}
if timeout != 0 {
conn.SetDeadline(time.Now().Add(time.Duration(timeout) * time.Second))
}
}
if err := connbuf.Err(); err != nil {
if !strings.Contains(err.Error(), "use of closed") {
log.Println("handleGraphiteTextProtocol(): Error reading: %v", err)
}
}
}
func handleGraphitePickleProtocol(rcvr *receiver.Receiver, conn net.Conn, timeout int) {
defer conn.Close() // decrements graceful.TcpWg
if timeout != 0 {
conn.SetDeadline(time.Now().Add(time.Duration(timeout) * time.Second))
}
// We use the Scanner, becase it has a MaxScanTokenSize of 64K
var (
name string
tstamp int64
int_value int64
value float64
err error
item interface{}
items, itemSlice, dp []interface{}
)
items, err = pickle.ListOrTuple(pickle.Unpickle(conn))
if err == nil {
for _, item = range items {
itemSlice, err = pickle.ListOrTuple(item, err)
if len(itemSlice) == 2 {
name, err = pickle.String(itemSlice[0], err)
dp, err = pickle.ListOrTuple(itemSlice[1], err)
if len(dp) == 2 {
tstamp, err = pickle.Int(dp[0], err)
if value, err = pickle.Float(dp[1], err); err != nil {
if _, ok := err.(pickle.WrongTypeError); ok {
if int_value, err = pickle.Int(dp[1], nil); err == nil {
value = float64(int_value)
}
}
}
rcvr.QueueDataPoint(name, time.Unix(tstamp, 0), value)
} else {
err = fmt.Errorf("dp wrong length: %d", len(dp))
break
}
} else {
err = fmt.Errorf("item wrong length: %d", len(itemSlice))
break
}
}
}
if timeout != 0 {
conn.SetDeadline(time.Now().Add(time.Duration(timeout) * time.Second))
}
if err != nil {
if !strings.Contains(err.Error(), "use of closed") {
log.Println("handleGraphitePickleProtocol(): Error reading: %v", err.Error())
}
}
}
func PixelHandler(rcvr *receiver.Receiver) http.HandlerFunc {
return func(w http.ResponseWriter, r *http.Request) {
defer func() {
if rc := recover(); rc != nil {
log.Printf("PixelHandler: Recovered (this request is dropped): %v", rc)
}
}()
sendPixel(w)
err := r.ParseForm()
if err != nil {
log.Printf("PixelHandler: error from ParseForm(): %v", err)
return
}
for name, vals := range r.Form {
// foo.bar.baz=12.345@1425959940
for _, valStr := range vals {
var val, ut float64
n, _ := fmt.Sscanf(valStr, "%f@%f", &val, &ut)
if n < 1 {
log.Printf("PixelHandler: error parsing %q", valStr)
return
}
var ts time.Time
if ut == 0 {
ts = time.Now()
} else {
nsec := int64(ut*1000000000) % 1000000000
ts = time.Unix(int64(ut), nsec)
}
rcvr.QueueDataPoint(misc.SanitizeName(name), ts, val)
}
}
}
}