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
|
package db
import (
"encoding/json"
"fmt"
"io"
"log"
"net/http"
"os"
"slices"
"strings"
"time"
"github.com/benbusby/farside/services"
"github.com/robfig/cron/v3"
)
const defaultPrimary = "https://farside.link/state"
const defaultCFPrimary = "https://cf.farside.link/state"
var LastUpdate time.Time
var skipInstanceChecks = []string{
"searx",
"searxng",
}
func InitCronTasks() {
log.Println("Initializing cron tasks...")
updateServiceList()
cronDisabled := os.Getenv("FARSIDE_CRON")
if len(cronDisabled) == 0 || cronDisabled == "1" {
c := cron.New()
c.AddFunc("@every 10m", queryServiceInstances)
c.AddFunc("@daily", updateServiceList)
c.Start()
}
queryServiceInstances()
}
func updateServiceList() {
fileName := services.GetServicesFileName()
_, _ = services.FetchServicesFile(fileName)
services.InitializeServices()
}
func queryServiceInstances() {
log.Println("Starting instance queries...")
isPrimary := os.Getenv("FARSIDE_PRIMARY")
if len(isPrimary) == 0 || isPrimary != "1" {
remoteServices, err := fetchInstancesFromPrimary()
if err != nil {
log.Println("Unable to fetch instances from primary", err)
}
for _, service := range remoteServices {
SetInstances(service.Type, service.Instances)
}
LastUpdate = time.Now().UTC()
return
}
for _, service := range services.ServiceList {
canSkip := slices.Contains[[]string, string](skipInstanceChecks, service.Type)
fmt.Printf("===== %s =====\n", service.Type)
var instances []string
for _, instance := range service.Instances {
testURL := strings.ReplaceAll(
service.TestURL,
"<%=query%>",
"current+weather")
available := queryServiceInstance(
instance,
testURL,
canSkip)
if available {
instances = append(instances, instance)
}
}
SetInstances(service.Type, instances)
}
LastUpdate = time.Now().UTC()
}
func fetchInstancesFromPrimary() ([]services.Service, error) {
primaryURL := defaultPrimary
useCF := os.Getenv("FARSIDE_CF_ENABLED")
if len(useCF) > 0 && useCF == "1" {
primaryURL = defaultCFPrimary
}
resp, err := http.Get(primaryURL)
if err != nil {
return nil, err
}
defer resp.Body.Close()
bodyBytes, err := io.ReadAll(resp.Body)
if err != nil {
return nil, err
}
var serviceList []services.Service
err = json.Unmarshal(bodyBytes, &serviceList)
return serviceList, err
}
func queryServiceInstance(instance, testURL string, canSkipCheck bool) bool {
testMode := os.Getenv("FARSIDE_TEST")
if len(testMode) > 0 && testMode == "1" {
return true
}
if canSkipCheck {
fmt.Printf(" [INFO] Adding %s\n", instance)
return true
}
ua := "Mozilla/5.0 (compatible; Farside/1.0.0; +https://farside.link)"
url := instance + testURL
req, err := http.NewRequest(http.MethodGet, url, nil)
if err != nil {
fmt.Println(" [ERRO] Failed to create new http request!", err)
return false
}
req.Header.Set("User-Agent", ua)
client := &http.Client{
Timeout: 10 * time.Second,
}
resp, err := client.Do(req)
if err != nil {
fmt.Println(" [ERRO] Error fetching instance:", err)
return false
} else if resp.StatusCode != http.StatusOK {
fmt.Printf(" [WARN] Received non-200 status for %s\n", url)
return false
} else {
fmt.Printf(" [INFO] Received 200 status for %s\n", url)
}
return true
}
|
