-
Notifications
You must be signed in to change notification settings - Fork 2
/
rules.go
172 lines (159 loc) · 4.11 KB
/
rules.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
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
161
162
163
164
165
166
167
168
169
170
171
172
package core
import (
"encoding/json"
"fmt"
"io/ioutil"
"os"
"path/filepath"
"strings"
"github.com/fsnotify/fsnotify"
"github.com/hexbotio/hex/models"
"gopkg.in/yaml.v2"
)
func Rules(rules *map[string]models.Rule, config models.Config) {
if config.RulesDir != "" {
if DirExists(config.RulesDir) {
go watchRules(config, rules)
ruleList := []string{}
err := filepath.Walk(config.RulesDir, func(path string, f os.FileInfo, err error) error {
if !f.IsDir() && isConfig(f.Name()) {
ruleList = append(ruleList, path)
}
return nil
})
if err != nil {
config.Logger.Error("Loading Rules Directory" + " - " + err.Error())
}
for _, file := range ruleList {
addRule(file, *rules, config)
}
} else {
fmt.Println("ERROR: The rules directory does not exist.")
os.Exit(1)
}
}
}
func addRule(ruleFile string, rules map[string]models.Rule, config models.Config) {
if _, exists := rules[ruleFile]; !exists {
if isConfig(ruleFile) {
config.Logger.Info("Loading Rule " + ruleFile)
rules[ruleFile] = readRule(ruleFile, config)
}
}
}
func reloadRule(ruleFile string, rules map[string]models.Rule, config models.Config) {
if isConfig(ruleFile) {
config.Logger.Info("Reloading Rule " + ruleFile)
rules[ruleFile] = readRule(ruleFile, config)
}
}
func removeRule(ruleFile string, rules map[string]models.Rule, config models.Config) {
if _, chk := rules[ruleFile]; chk {
config.Logger.Info("Removing Rule " + ruleFile)
delete(rules, ruleFile)
}
}
func readRule(ruleFile string, config models.Config) (rule models.Rule) {
rule = models.Rule{
Active: true,
Debug: false,
Format: false,
Hide: false,
ACL: "*",
OutputFailOnly: false,
OutputOnChange: false,
}
if FileExists(ruleFile) {
file, err := ioutil.ReadFile(ruleFile)
if err != nil {
config.Logger.Error("Add Rule File Read " + ruleFile + " - " + err.Error())
rule.Active = false
return rule
}
ruleType := fileType(ruleFile)
if ruleType == "json" {
err = json.Unmarshal(file, &rule)
if err != nil {
config.Logger.Error("Add Rule json Unmarshal " + ruleFile + " - " + err.Error())
rule.Active = false
return rule
}
} else if ruleType == "yaml" {
err = yaml.Unmarshal(file, &rule)
if err != nil {
config.Logger.Error("Add Rule yaml Unmarshal " + ruleFile + " - " + err.Error())
rule.Active = false
return rule
}
} else {
return rule
}
for i := 0; i < len(rule.Actions); i++ {
rule.Actions[i].Type = ResolvePluginName(rule.Actions[i].Type)
}
// no need to sub action.config as this happens at matcher time
}
rule.Id = ruleFile
return rule
}
func watchRules(config models.Config, rules *map[string]models.Rule) {
watcher, err := fsnotify.NewWatcher()
if err != nil {
config.Logger.Error("File Watcher" + " - " + err.Error())
}
defer watcher.Close()
done := make(chan bool)
go func() {
for {
select {
case event := <-watcher.Events:
if event.Op&fsnotify.Create == fsnotify.Create {
addRule(event.Name, *rules, config)
}
if event.Op&fsnotify.Remove == fsnotify.Remove {
removeRule(event.Name, *rules, config)
}
if event.Op&fsnotify.Write == fsnotify.Write {
reloadRule(event.Name, *rules, config)
}
if event.Op&fsnotify.Rename == fsnotify.Rename {
removeRule(event.Name, *rules, config)
}
if event.Op&fsnotify.Chmod == fsnotify.Chmod {
reloadRule(event.Name, *rules, config)
}
case err := <-watcher.Errors:
config.Logger.Error("Rule Load" + " - " + err.Error())
}
}
}()
err = watcher.Add(config.RulesDir)
if err != nil {
config.Logger.Error("File Watcher Add" + " - " + err.Error())
}
<-done
}
func isConfig(file string) bool {
if strings.HasSuffix(file, ".json") {
return true
}
if strings.HasSuffix(file, ".yaml") {
return true
}
if strings.HasSuffix(file, ".yml") {
return true
}
return false
}
func fileType(file string) string {
if strings.HasSuffix(file, ".json") {
return "json"
}
if strings.HasSuffix(file, ".yaml") {
return "yaml"
}
if strings.HasSuffix(file, ".yml") {
return "yaml"
}
return ""
}