// ListenAndServe binds the server to the given UDP interface.
func (u *UDPServer) ListenAndServe(iface string) error {
addr, err := net.ResolveUDPAddr("udp", iface)
if err != nil {
log.Printf("Failed resolve UDP address %s: %s", iface, err)
return err
}
conn, err := net.ListenUDP("udp", addr)
if err != nil {
log.Printf("Failed set up UDP listener at address %s: %s", addr, err)
return err
}
var bp client.BatchPoints
buf := make([]byte, udpBufferSize)
go func() {
for {
_, _, err := conn.ReadFromUDP(buf)
if err != nil {
log.Printf("Failed read UDP message: %s.", err)
continue
}
dec := json.NewDecoder(bytes.NewReader(buf))
if err := dec.Decode(&bp); err != nil {
log.Printf("Failed decode JSON UDP message")
continue
}
points, err := influxdb.NormalizeBatchPoints(bp)
if err != nil {
log.Printf("Failed normalize batch points")
continue
}
if msgIndex, err := u.writer.WriteSeries(bp.Database, bp.RetentionPolicy, points); err != nil {
log.Printf("Server write failed. Message index was %d: %s", msgIndex, err)
}
}
}()
return nil
}
func TestNormalizeBatchPoints(t *testing.T) {
now := time.Now()
tests := []struct {
name string
bp client.BatchPoints
p []influxdb.Point
err string
}{
{
name: "default",
bp: client.BatchPoints{
Points: []client.Point{
{Name: "cpu", Tags: map[string]string{"region": "useast"}, Timestamp: now, Fields: map[string]interface{}{"value": 1.0}},
},
},
p: []influxdb.Point{
{Name: "cpu", Tags: map[string]string{"region": "useast"}, Timestamp: now, Fields: map[string]interface{}{"value": 1.0}},
},
},
{
name: "merge timestamp",
bp: client.BatchPoints{
Timestamp: now,
Points: []client.Point{
{Name: "cpu", Tags: map[string]string{"region": "useast"}, Fields: map[string]interface{}{"value": 1.0}},
},
},
p: []influxdb.Point{
{Name: "cpu", Tags: map[string]string{"region": "useast"}, Timestamp: now, Fields: map[string]interface{}{"value": 1.0}},
},
},
{
name: "merge tags",
bp: client.BatchPoints{
Tags: map[string]string{"day": "monday"},
Points: []client.Point{
{Name: "cpu", Tags: map[string]string{"region": "useast"}, Timestamp: now, Fields: map[string]interface{}{"value": 1.0}},
{Name: "memory", Timestamp: now, Fields: map[string]interface{}{"value": 2.0}},
},
},
p: []influxdb.Point{
{Name: "cpu", Tags: map[string]string{"day": "monday", "region": "useast"}, Timestamp: now, Fields: map[string]interface{}{"value": 1.0}},
{Name: "memory", Tags: map[string]string{"day": "monday"}, Timestamp: now, Fields: map[string]interface{}{"value": 2.0}},
},
},
}
for _, test := range tests {
t.Logf("running test %q", test.name)
p, e := influxdb.NormalizeBatchPoints(test.bp)
if test.err == "" && e != nil {
t.Errorf("unexpected error %v", e)
} else if test.err != "" && e == nil {
t.Errorf("expected error %s, got <nil>", test.err)
} else if e != nil && test.err != e.Error() {
t.Errorf("unexpected error. expected: %s, got %v", test.err, e)
}
if !reflect.DeepEqual(p, test.p) {
t.Logf("expected: %+v", test.p)
t.Logf("got: %+v", p)
t.Error("failed to normalize.")
}
}
}
// serveWrite receives incoming series data and writes it to the database.
func (h *Handler) serveWrite(w http.ResponseWriter, r *http.Request, user *influxdb.User) {
var bp client.BatchPoints
var dec *json.Decoder
if h.WriteTrace {
b, err := ioutil.ReadAll(r.Body)
if err != nil {
h.Logger.Print("write handler failed to read bytes from request body")
} else {
h.Logger.Printf("write body received by handler: %s", string(b))
}
dec = json.NewDecoder(strings.NewReader(string(b)))
} else {
dec = json.NewDecoder(r.Body)
defer r.Body.Close()
}
var writeError = func(result influxdb.Result, statusCode int) {
w.WriteHeader(statusCode)
w.Header().Add("content-type", "application/json")
_ = json.NewEncoder(w).Encode(&result)
return
}
if err := dec.Decode(&bp); err != nil {
if err.Error() == "EOF" {
w.WriteHeader(http.StatusOK)
return
}
writeError(influxdb.Result{Err: err}, http.StatusInternalServerError)
return
}
if bp.Database == "" {
writeError(influxdb.Result{Err: fmt.Errorf("database is required")}, http.StatusInternalServerError)
return
}
if !h.server.DatabaseExists(bp.Database) {
writeError(influxdb.Result{Err: fmt.Errorf("database not found: %q", bp.Database)}, http.StatusNotFound)
return
}
if h.requireAuthentication && user == nil {
writeError(influxdb.Result{Err: fmt.Errorf("user is required to write to database %q", bp.Database)}, http.StatusUnauthorized)
return
}
if h.requireAuthentication && !user.Authorize(influxql.WritePrivilege, bp.Database) {
writeError(influxdb.Result{Err: fmt.Errorf("%q user is not authorized to write to database %q", user.Name, bp.Database)}, http.StatusUnauthorized)
return
}
points, err := influxdb.NormalizeBatchPoints(bp)
if err != nil {
writeError(influxdb.Result{Err: err}, http.StatusInternalServerError)
return
}
if index, err := h.server.WriteSeries(bp.Database, bp.RetentionPolicy, points); err != nil {
writeError(influxdb.Result{Err: err}, http.StatusInternalServerError)
return
} else {
w.Header().Add("X-InfluxDB-Index", fmt.Sprintf("%d", index))
}
}