/usr/share/gocode/src/github.com/influxdata/influxdb/services/httpd/service.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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 | package httpd // import "github.com/influxdata/influxdb/services/httpd"
import (
"crypto/tls"
"fmt"
"io"
"log"
"net"
"net/http"
"os"
"path"
"runtime"
"strings"
"syscall"
"time"
"github.com/influxdata/influxdb/models"
)
// statistics gathered by the httpd package.
const (
statRequest = "req" // Number of HTTP requests served
statQueryRequest = "queryReq" // Number of query requests served
statWriteRequest = "writeReq" // Number of write requests serverd
statPingRequest = "pingReq" // Number of ping requests served
statStatusRequest = "statusReq" // Number of status requests served
statWriteRequestBytesReceived = "writeReqBytes" // Sum of all bytes in write requests
statQueryRequestBytesTransmitted = "queryRespBytes" // Sum of all bytes returned in query reponses
statPointsWrittenOK = "pointsWrittenOK" // Number of points written OK
statPointsWrittenDropped = "pointsWrittenDropped" // Number of points dropped by the storage engine
statPointsWrittenFail = "pointsWrittenFail" // Number of points that failed to be written
statAuthFail = "authFail" // Number of authentication failures
statRequestDuration = "reqDurationNs" // Number of (wall-time) nanoseconds spent inside requests
statQueryRequestDuration = "queryReqDurationNs" // Number of (wall-time) nanoseconds spent inside query requests
statWriteRequestDuration = "writeReqDurationNs" // Number of (wall-time) nanoseconds spent inside write requests
statRequestsActive = "reqActive" // Number of currently active requests
statWriteRequestsActive = "writeReqActive" // Number of currently active write requests
statClientError = "clientError" // Number of HTTP responses due to client error
statServerError = "serverError" // Number of HTTP responses due to server error
)
// Service manages the listener and handler for an HTTP endpoint.
type Service struct {
ln net.Listener
addr string
https bool
cert string
key string
limit int
err chan error
unixSocket bool
bindSocket string
unixSocketListener net.Listener
Handler *Handler
Logger *log.Logger
}
// NewService returns a new instance of Service.
func NewService(c Config) *Service {
s := &Service{
addr: c.BindAddress,
https: c.HTTPSEnabled,
cert: c.HTTPSCertificate,
key: c.HTTPSPrivateKey,
limit: c.MaxConnectionLimit,
err: make(chan error),
unixSocket: c.UnixSocketEnabled,
bindSocket: c.BindSocket,
Handler: NewHandler(c),
Logger: log.New(os.Stderr, "[httpd] ", log.LstdFlags),
}
if s.key == "" {
s.key = s.cert
}
s.Handler.Logger = s.Logger
return s
}
// Open starts the service
func (s *Service) Open() error {
s.Logger.Println("Starting HTTP service")
s.Logger.Println("Authentication enabled:", s.Handler.Config.AuthEnabled)
// Open listener.
if s.https {
cert, err := tls.LoadX509KeyPair(s.cert, s.key)
if err != nil {
return err
}
listener, err := tls.Listen("tcp", s.addr, &tls.Config{
Certificates: []tls.Certificate{cert},
})
if err != nil {
return err
}
s.Logger.Println("Listening on HTTPS:", listener.Addr().String())
s.ln = listener
} else {
listener, err := net.Listen("tcp", s.addr)
if err != nil {
return err
}
s.Logger.Println("Listening on HTTP:", listener.Addr().String())
s.ln = listener
}
// Open unix socket listener.
if s.unixSocket {
if runtime.GOOS == "windows" {
return fmt.Errorf("unable to use unix socket on windows")
}
if err := os.MkdirAll(path.Dir(s.bindSocket), 0777); err != nil {
return err
}
if err := syscall.Unlink(s.bindSocket); err != nil && !os.IsNotExist(err) {
return err
}
listener, err := net.Listen("unix", s.bindSocket)
if err != nil {
return err
}
s.Logger.Println("Listening on unix socket:", listener.Addr().String())
s.unixSocketListener = listener
go s.serveUnixSocket()
}
// Enforce a connection limit if one has been given.
if s.limit > 0 {
s.ln = LimitListener(s.ln, s.limit)
}
// wait for the listeners to start
timeout := time.Now().Add(time.Second)
for {
if s.ln.Addr() != nil {
break
}
if time.Now().After(timeout) {
return fmt.Errorf("unable to open without http listener running")
}
time.Sleep(10 * time.Millisecond)
}
// Begin listening for requests in a separate goroutine.
go s.serveTCP()
return nil
}
// Close closes the underlying listener.
func (s *Service) Close() error {
if s.ln != nil {
if err := s.ln.Close(); err != nil {
return err
}
}
if s.unixSocketListener != nil {
if err := s.unixSocketListener.Close(); err != nil {
return err
}
}
return nil
}
// SetLogOutput sets the writer to which all logs are written. It must not be
// called after Open is called.
func (s *Service) SetLogOutput(w io.Writer) {
l := log.New(w, "[httpd] ", log.LstdFlags)
s.Logger = l
s.Handler.Logger = l
}
// Err returns a channel for fatal errors that occur on the listener.
func (s *Service) Err() <-chan error { return s.err }
// Addr returns the listener's address. Returns nil if listener is closed.
func (s *Service) Addr() net.Addr {
if s.ln != nil {
return s.ln.Addr()
}
return nil
}
// Statistics returns statistics for periodic monitoring.
func (s *Service) Statistics(tags map[string]string) []models.Statistic {
return s.Handler.Statistics(models.NewTags(map[string]string{"bind": s.addr}).Merge(tags).Map())
}
// serveTCP serves the handler from the TCP listener.
func (s *Service) serveTCP() {
s.serve(s.ln)
}
// serveUnixSocket serves the handler from the unix socket listener.
func (s *Service) serveUnixSocket() {
s.serve(s.unixSocketListener)
}
// serve serves the handler from the listener.
func (s *Service) serve(listener net.Listener) {
// The listener was closed so exit
// See https://github.com/golang/go/issues/4373
err := http.Serve(listener, s.Handler)
if err != nil && !strings.Contains(err.Error(), "closed") {
s.err <- fmt.Errorf("listener failed: addr=%s, err=%s", s.Addr(), err)
}
}
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