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
|
package server
import (
"context"
"fmt"
"net"
"net/http"
"net/url"
"os"
"slices"
"time"
cfg "website/internal/config"
"website/internal/log"
"website/internal/website"
"github.com/getsentry/sentry-go"
sentryhttp "github.com/getsentry/sentry-go/http"
"github.com/pkg/errors"
"golang.org/x/net/http2"
"golang.org/x/net/http2/h2c"
)
var (
CommitSHA = "local"
ShortSHA = "local"
serverHeader = fmt.Sprintf("website (%s)", ShortSHA)
)
type Config struct {
Production bool `conf:"default:false"`
InDevServer bool `conf:"default:false"`
Root string `conf:"default:website"`
ListenAddress string `conf:"default:localhost"`
Port string `conf:"default:3000,short:p"`
}
type Server struct {
*http.Server
}
func applyDevModeOverrides(config *cfg.Config, listenAddress string) {
config.CSP.ScriptSrc = slices.Insert(config.CSP.ScriptSrc, 0, "'unsafe-inline'")
config.CSP.ConnectSrc = slices.Insert(config.CSP.ConnectSrc, 0, "'self'")
config.BaseURL = cfg.URL{
URL: &url.URL{
Scheme: "http",
Host: listenAddress,
},
}
}
func serverHeaderHandler(wrappedHandler http.Handler) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
if r.ProtoMajor >= 2 && r.Header.Get("Host") != "" {
// net/http does this for HTTP/1.1, but not h2c
// TODO: check with HTTP/2.0 (i.e. with TLS)
r.Host = r.Header.Get("Host")
r.Header.Del("Host")
}
w.Header().Set("Server", serverHeader)
wrappedHandler.ServeHTTP(w, r)
})
}
func New(runtimeConfig *Config) (*Server, error) {
var err error
config, err := cfg.GetConfig()
if err != nil {
return nil, errors.WithMessage(err, "error parsing configuration file")
}
listenAddress := net.JoinHostPort(runtimeConfig.ListenAddress, runtimeConfig.Port)
env := "development"
if runtimeConfig.Production {
env = "production"
} else {
applyDevModeOverrides(config, listenAddress)
}
err = sentry.Init(sentry.ClientOptions{
EnableTracing: true,
TracesSampleRate: 1.0,
Dsn: os.Getenv("SENTRY_DSN"),
Release: CommitSHA,
Environment: env,
})
if err != nil {
return nil, errors.WithMessage(err, "could not set up sentry")
}
defer sentry.Flush(2 * time.Second)
sentryHandler := sentryhttp.New(sentryhttp.Options{
Repanic: true,
})
top := http.NewServeMux()
mux, err := website.NewMux(config, runtimeConfig.Root)
if err != nil {
return nil, errors.Wrap(err, "could not create website mux")
}
log.Debug("binding main handler to", "host", listenAddress)
hostname := config.BaseURL.Hostname()
top.Handle(hostname+"/", mux)
top.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
newURL := config.BaseURL.JoinPath(r.URL.String())
http.Redirect(w, r, newURL.String(), 301)
})
top.HandleFunc("/health", func(w http.ResponseWriter, _ *http.Request) {
w.WriteHeader(http.StatusNoContent)
})
return &Server{
&http.Server{
Addr: listenAddress,
ReadHeaderTimeout: 1 * time.Minute,
Handler: http.MaxBytesHandler(h2c.NewHandler(
sentryHandler.Handle(
serverHeaderHandler(
wrapHandlerWithLogging(top),
),
),
&http2.Server{
IdleTimeout: 15 * time.Minute,
},
), 0),
},
}, nil
}
func (s *Server) Start() error {
if err := s.ListenAndServe(); err != http.ErrServerClosed {
return errors.Wrap(err, "error creating/closing server")
}
return nil
}
func (s *Server) Stop() chan struct{} {
log.Debug("stop called")
idleConnsClosed := make(chan struct{})
go func() {
log.Debug("shutting down server")
ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
defer cancel()
err := s.Server.Shutdown(ctx)
log.Debug("server shut down")
if err != nil {
// Error from closing listeners, or context timeout:
log.Warn("HTTP server Shutdown", "error", err)
}
close(idleConnsClosed)
}()
return idleConnsClosed
}
|