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
|
package server
import (
_ "embed"
"encoding/json"
"html/template"
"log"
"net/http"
"net/url"
"os"
"strings"
"time"
"github.com/benbusby/farside/db"
"github.com/benbusby/farside/services"
)
//go:embed index.html
var indexHTML string
//go:embed route.html
var routeHTML string
type indexData struct {
LastUpdated time.Time
ServiceList []services.Service
}
type routeData struct {
InstanceURL string
}
func home(w http.ResponseWriter, r *http.Request) {
serviceList := db.GetServiceList()
data := indexData{
LastUpdated: db.LastUpdate,
ServiceList: serviceList,
}
tmpl, err := template.New("").Parse(indexHTML)
if err != nil {
log.Println(err)
http.Error(w, "Error parsing template", http.StatusInternalServerError)
return
}
w.Header().Set("Content-Type", "text/html")
err = tmpl.Execute(w, data)
if err != nil {
log.Println(err)
http.Error(w, "Error executing template", http.StatusInternalServerError)
}
}
func state(w http.ResponseWriter, r *http.Request) {
storedServices := db.GetServiceList()
jsonData, _ := json.Marshal(storedServices)
w.Header().Set("Content-Type", "application/json")
_, _ = w.Write(jsonData)
}
func baseRouting(w http.ResponseWriter, r *http.Request) {
routing(w, r, false)
}
func jsRouting(w http.ResponseWriter, r *http.Request) {
r.URL.Path = strings.Replace(r.URL.Path, "/_", "", 1)
routing(w, r, true)
}
func routing(w http.ResponseWriter, r *http.Request, jsEnabled bool) {
value := r.PathValue("routing")
if len(value) == 0 {
value = r.URL.Path
}
url, _ := url.Parse(value)
path := strings.TrimPrefix(url.Path, "/")
segments := strings.Split(path, "/")
target, err := services.MatchRequest(segments[0])
if err != nil {
log.Printf("Error during match request: %v\n", err)
http.Error(w, "No routing found for "+target, http.StatusBadRequest)
return
}
instance, err := db.GetInstance(target)
if err != nil {
log.Printf("Error fetching instance from db: %v\n", err)
http.Error(
w,
"Error fetching instance for "+target,
http.StatusInternalServerError)
return
}
if len(segments) > 1 {
targetPath := strings.Join(segments[1:], "/")
instance = instance + "/" + targetPath
}
w.Header().Set("Cache-Control", "no-store, no-cache, must-revalidate, max-age=0")
w.Header().Set("Pragma", "no-cache")
w.Header().Set("Expires", "0")
if jsEnabled {
data := routeData{
InstanceURL: instance,
}
tmpl, _ := template.New("").Parse(routeHTML)
w.Header().Set("Content-Type", "text/html")
_ = tmpl.Execute(w, data)
} else {
http.Redirect(w, r, instance, http.StatusFound)
}
}
func RunServer() {
mux := http.NewServeMux()
mux.HandleFunc("/{$}", home)
mux.HandleFunc("/state/{$}", state)
mux.HandleFunc("/{routing...}", baseRouting)
mux.HandleFunc("/_/{routing...}", jsRouting)
port := os.Getenv("FARSIDE_PORT")
if len(port) == 0 {
port = "4001"
}
log.Println("Starting server on http://localhost:" + port)
err := http.ListenAndServe(":"+port, mux)
if err != nil {
log.Fatal(err)
}
}
|
