/
http_server.go
74 lines (64 loc) · 1.79 KB
/
http_server.go
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
package internal
import (
"context"
"fmt"
"github.com/prometheus/client_golang/prometheus/promhttp"
"net"
netHttp "net/http"
"sync"
)
// HttpServer serves endpoints from the given Config
type HttpServer struct {
Port int
config Config
server *netHttp.Server
}
// NewHttpServer creates a new instance of the HttpServer
func NewHttpServer(config Config) *HttpServer {
return &HttpServer{
config: config,
}
}
// Starts the HttpServer
// Returns a WaitGroup which will be released as soon as the server stops
func (s *HttpServer) Start(wg *sync.WaitGroup) {
if err := registerHealthHandler(s.config.HTTP.Health, s.config.MongoDb.URI); err != nil {
log.Fatal(err.Error())
}
registerLivelinessHandler(s.config.HTTP.Liveliness)
registerPrometheusHandler(s.config.HTTP.Prometheus)
listener, err := net.Listen("tcp", fmt.Sprintf(":%d", s.config.HTTP.Port))
if err != nil {
log.Fatal(err.Error())
}
s.Port = listener.Addr().(*net.TCPAddr).Port
s.server = &netHttp.Server{}
go func() {
defer wg.Done()
defer log.Info("Stopping server")
log.Info(fmt.Sprintf("Serving endpoint on port: %v", s.Port))
if err := s.server.Serve(listener); err != netHttp.ErrServerClosed {
log.Fatal(fmt.Sprintf("ListenAndServe(): %v", err))
}
}()
}
// Shutdown stops the running server
func (s *HttpServer) Shutdown(ctx context.Context) error {
return s.server.Shutdown(ctx)
}
func registerHealthHandler(path string, mongoUri string) error {
handler, err := RegisterHealthChecks(mongoUri)
if err != nil {
return err
}
netHttp.Handle(path, handler)
return nil
}
func registerLivelinessHandler(path string) {
netHttp.HandleFunc(path, func(w netHttp.ResponseWriter, request *netHttp.Request) {
w.WriteHeader(204)
})
}
func registerPrometheusHandler(path string) {
netHttp.Handle(path, promhttp.Handler())
}