/usr/share/gocode/src/github.com/influxdata/influxdb/services/opentsdb/handler.go is in golang-github-influxdb-influxdb-dev 1.1.1+dfsg1-4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 | package opentsdb
import (
"bufio"
"compress/gzip"
"encoding/json"
"errors"
"io"
"log"
"net"
"net/http"
"sync"
"sync/atomic"
"time"
"github.com/influxdata/influxdb"
"github.com/influxdata/influxdb/models"
)
// Handler is an http.Handler for the service.
type Handler struct {
Database string
RetentionPolicy string
PointsWriter interface {
WritePoints(database, retentionPolicy string, consistencyLevel models.ConsistencyLevel, points []models.Point) error
}
Logger *log.Logger
stats *Statistics
}
func (h *Handler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
switch r.URL.Path {
case "/api/metadata/put":
w.WriteHeader(http.StatusNoContent)
case "/api/put":
h.servePut(w, r)
default:
http.NotFound(w, r)
}
}
// ServeHTTP implements OpenTSDB's HTTP /api/put endpoint
func (h *Handler) servePut(w http.ResponseWriter, r *http.Request) {
defer r.Body.Close()
// Require POST method.
if r.Method != "POST" {
http.Error(w, http.StatusText(http.StatusMethodNotAllowed), http.StatusMethodNotAllowed)
return
}
// Wrap reader if it's gzip encoded.
var br *bufio.Reader
if r.Header.Get("Content-Encoding") == "gzip" {
zr, err := gzip.NewReader(r.Body)
if err != nil {
http.Error(w, "could not read gzip, "+err.Error(), http.StatusBadRequest)
return
}
br = bufio.NewReader(zr)
} else {
br = bufio.NewReader(r.Body)
}
// Lookahead at the first byte.
f, err := br.Peek(1)
if err != nil || len(f) != 1 {
http.Error(w, "peek error: "+err.Error(), http.StatusBadRequest)
return
}
// Peek to see if this is a JSON array.
var multi bool
switch f[0] {
case '{':
case '[':
multi = true
default:
http.Error(w, "expected JSON array or hash", http.StatusBadRequest)
return
}
// Decode JSON data into slice of points.
dps := make([]point, 1)
if dec := json.NewDecoder(br); multi {
if err = dec.Decode(&dps); err != nil {
http.Error(w, "json array decode error", http.StatusBadRequest)
return
}
} else {
if err = dec.Decode(&dps[0]); err != nil {
http.Error(w, "json object decode error", http.StatusBadRequest)
return
}
}
// Convert points into TSDB points.
points := make([]models.Point, 0, len(dps))
for i := range dps {
p := dps[i]
// Convert timestamp to Go time.
// If time value is over a billion then it's microseconds.
var ts time.Time
if p.Time < 10000000000 {
ts = time.Unix(p.Time, 0)
} else {
ts = time.Unix(p.Time/1000, (p.Time%1000)*1000)
}
pt, err := models.NewPoint(p.Metric, models.NewTags(p.Tags), map[string]interface{}{"value": p.Value}, ts)
if err != nil {
h.Logger.Printf("Dropping point %v: %v", p.Metric, err)
if h.stats != nil {
atomic.AddInt64(&h.stats.InvalidDroppedPoints, 1)
}
continue
}
points = append(points, pt)
}
// Write points.
if err := h.PointsWriter.WritePoints(h.Database, h.RetentionPolicy, models.ConsistencyLevelAny, points); influxdb.IsClientError(err) {
h.Logger.Println("write series error: ", err)
http.Error(w, "write series error: "+err.Error(), http.StatusBadRequest)
return
} else if err != nil {
h.Logger.Println("write series error: ", err)
http.Error(w, "write series error: "+err.Error(), http.StatusInternalServerError)
return
}
w.WriteHeader(http.StatusNoContent)
}
// chanListener represents a listener that receives connections through a channel.
type chanListener struct {
addr net.Addr
ch chan net.Conn
done chan struct{}
closer sync.Once // closer ensures that Close is idempotent.
}
// newChanListener returns a new instance of chanListener.
func newChanListener(addr net.Addr) *chanListener {
return &chanListener{
addr: addr,
ch: make(chan net.Conn),
done: make(chan struct{}),
}
}
func (ln *chanListener) Accept() (net.Conn, error) {
errClosed := errors.New("network connection closed")
select {
case <-ln.done:
return nil, errClosed
case conn, ok := <-ln.ch:
if !ok {
return nil, errClosed
}
return conn, nil
}
}
// Close closes the connection channel.
func (ln *chanListener) Close() error {
ln.closer.Do(func() {
close(ln.done)
})
return nil
}
// Addr returns the network address of the listener.
func (ln *chanListener) Addr() net.Addr { return ln.addr }
// readerConn represents a net.Conn with an assignable reader.
type readerConn struct {
net.Conn
r io.Reader
}
// Read implements the io.Reader interface.
func (conn *readerConn) Read(b []byte) (n int, err error) { return conn.r.Read(b) }
// point represents an incoming JSON data point.
type point struct {
Metric string `json:"metric"`
Time int64 `json:"timestamp"`
Value float64 `json:"value"`
Tags map[string]string `json:"tags,omitempty"`
}
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