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circolog.Message: for readers

refs #14
This commit is contained in:
boyska 2019-03-24 19:54:41 +01:00
rodzic 85ccd65543
commit aeceda5caa
4 zmienionych plików z 38 dodań i 17 usunięć

Wyświetl plik

@ -11,12 +11,12 @@ import (
"strconv"
"time"
"git.lattuga.net/boyska/circolog"
"git.lattuga.net/boyska/circolog/filtering"
"git.lattuga.net/boyska/circolog/formatter"
"github.com/gorilla/websocket"
isatty "github.com/mattn/go-isatty"
"github.com/mgutz/ansi"
"gopkg.in/mcuadros/go-syslog.v2/format"
"gopkg.in/mgo.v2/bson"
)
@ -112,7 +112,7 @@ func main() {
log.Println("close:", err)
return
}
var parsed format.LogParts
var parsed circolog.Message
if err := bson.Unmarshal(serialized, &parsed); err != nil {
log.Println("invalid BSON", err)
continue

Wyświetl plik

@ -11,7 +11,6 @@ import (
"git.lattuga.net/boyska/circolog"
"git.lattuga.net/boyska/circolog/formatter"
"github.com/gorilla/websocket"
"gopkg.in/mcuadros/go-syslog.v2/format"
)
func setupHTTP(hub circolog.Hub) *http.ServeMux {
@ -100,7 +99,7 @@ func getHTTPHandler(hub circolog.Hub) http.HandlerFunc {
opts.Nofollow = true
client := circolog.Client{
Messages: make(chan format.LogParts, 20),
Messages: make(chan circolog.Message, 20),
Options: opts,
}
hub.Register <- client
@ -141,7 +140,7 @@ func getWSHandler(hub circolog.Hub) http.HandlerFunc {
return
}
client := circolog.Client{
Messages: make(chan format.LogParts, 20),
Messages: make(chan circolog.Message, 20),
Options: opts,
}
hub.Register <- client

Wyświetl plik

@ -8,13 +8,13 @@ import (
"text/template"
"time"
"git.lattuga.net/boyska/circolog"
"github.com/mgutz/ansi"
"gopkg.in/mcuadros/go-syslog.v2/format"
"gopkg.in/mgo.v2/bson"
)
// Formatter is an interface, so that multiple implementations can exist
type Formatter func(format.LogParts) string
type Formatter func(circolog.Message) string
var tmplFuncs template.FuncMap
var syslogTmpl *template.Template
@ -56,11 +56,11 @@ func init() {
},
}
syslogTmpl = template.Must(template.New("syslog").Funcs(tmplFuncs).Parse(
"{{color \"yellow\" (rfc822 (index . \"timestamp\")) }} {{index . \"hostname\"}} " +
"{{index . \"app_name\" | autoColor}}" +
"{{color \"yellow\" (rfc822 (index . \"time\")) }} {{index . \"hostname\"}} " +
"{{index . \"prog\" | autoColor}}" +
"{{ if (ne (index . \"proc_id\") \"-\")}}[{{index . \"proc_id\"}}]{{end}}: " +
"{{ sevName (index . \"severity\") }} " +
"{{index . \"message\"}}",
"{{ sevName (index . \"sev\") }} " +
"{{index . \"msg\"}}",
))
}
@ -87,7 +87,7 @@ func (rf Format) String() string {
return ""
}
func (rf Format) WriteFormatted(w io.Writer, msg format.LogParts) error {
func (rf Format) WriteFormatted(w io.Writer, msg circolog.Message) error {
return WriteFormatted(w, rf, msg)
}
@ -110,7 +110,7 @@ const (
FormatBSON = iota
)
func WriteFormatted(w io.Writer, f Format, msg format.LogParts) error {
func WriteFormatted(w io.Writer, f Format, msg circolog.Message) error {
switch f {
case FormatSyslog:
return syslogTmpl.Execute(w, msg)

30
hub.go
Wyświetl plik

@ -10,13 +10,19 @@ import (
"gopkg.in/mcuadros/go-syslog.v2/format"
)
// Message is currently an alias for format.Logparts, but this is only temporary; sooner or later, a real struct will be used
// The advantage of having an explicit Message is to clear out what data we are sending to circolog "readers"
// This is not necessarily (and not in practice) the same structure that we receive from logging programs
type Message format.LogParts
// Client represent a client connected via websocket. Its most important field is the messages channel, where
// new messages are sent.
type Client struct {
Messages chan format.LogParts // only hub should write/close this
Messages chan Message // only hub should write/close this
Options ClientOptions
}
// ClientOptions is a struct containing connection options for every reader
type ClientOptions struct {
BacklogLength int // how many past messages the client wants to receive upon connection
Nofollow bool // if Nofollow is true, the hub will not keep this client permanently. Rather, it will send every message to "Messages" and close the channel. Use this if you want to get the messages one-shot
@ -100,7 +106,7 @@ func (h *Hub) register(cl Client) {
item := buf.Value
if item != nil {
select { // send with short timeout
case cl.Messages <- item.(format.LogParts):
case cl.Messages <- item.(Message):
break
case <-time.After(500 * time.Millisecond):
close(cl.Messages)
@ -117,6 +123,21 @@ func (h *Hub) register(cl Client) {
}
}
// logEntryToMessage converts messages received from writers to the format we promise to readers
func logEntryToMessage(orig format.LogParts) Message {
m := Message{}
// it currently only supports RFC5424. TODO: support RFC3164
m["prog"] = orig["app_name"]
m["client"] = orig["client"]
m["hostname"] = orig["hostname"]
m["proc_id"] = orig["proc_id"]
m["msg"] = orig["message"]
m["facility"] = orig["facility"]
m["time"] = orig["timestamp"]
m["sev"] = orig["severity"]
return m
}
// Run is hub main loop; keeps everything going
func (h *Hub) Run() {
active := true
@ -133,11 +154,12 @@ func (h *Hub) Run() {
}
case msg := <-h.LogMessages:
if active == true && filter.Validate(msg) {
h.circbuf.Value = msg
newmsg := logEntryToMessage(msg)
h.circbuf.Value = newmsg
h.circbuf = h.circbuf.Next()
for client := range h.clients {
select { // send without blocking
case client.Messages <- msg:
case client.Messages <- newmsg:
break
default:
break